CN104514539A

CN104514539A - Drilling System and Method for Predicting Vibration in an Underground Drilling Operation

Info

Publication number: CN104514539A
Application number: CN201410498377.4A
Authority: CN
Inventors: 马克·埃尔斯沃思·瓦塞尔
Original assignee: APS Technology Inc
Current assignee: APS Technology Inc
Priority date: 2013-09-25
Filing date: 2014-09-25
Publication date: 2015-04-15
Also published as: US20150083493A1; GB201416776D0; GB2518981B; CA2864549A1; GB2518981A

Abstract

The invention relates to a drilling system and a method for predicting vibration in an underground drilling operation. A drilling system and associated systems and methods for monitoring, controlling, and predicting vibration of a drilling operation are provided. The vibration information can include axial, lateral or torsional vibration of a drill string.

Description

Drilling system and the method for predicting the vibration in subsurface drilling operation

Technical field

The present invention relates to a kind of drilling system for subsurface boring, and relate more specifically to a kind of method for monitoring the vibration of drilling operation, control and predict.

Background technology

Hole in the stratum that the subsurface boring of such as combustion gas, oil or geothermal drilling and so on is usually directed to penetratingly depths, the end.This boring to be referred to as " drill string " usually to be formed assembly by drill bit being connected to the long tube section being referred to as " drilling rod " is formed.Drill string extends to the bottom of boring from earth's surface.Bit, makes drill bit be advanced in soil, thus forms boring.In rotary drilling, by rotating described drill bit at earth's surface place rotary drill column.High pressure drilling mud is pumped across the inner passage in drill string and is pumped out by drill bit by the pump at earth's surface place.Drilling mud lubricates drill bit, and rinses the landwaste from the path of drill bit.In some cases, the mud of flowing is also for the drill motor being usually referred to as " MTR " provides power, and this MTR rotates again this drill bit.Under any circumstance, drilling mud all flows back into earth's surface by the circular passage formed between drill string and the surface of boring.Generally speaking, the penetration rate be drilled in stratum when drill bit is high as far as possible, when the vibration of drilling system is low as far as possible simultaneously, obtains best probing.Penetration rate (" ROP ") is the function of multiple variable, and described multiple variable comprises rotary speed and the pressure of the drill (" WOB ") of drill bit.Drilling environment and especially hard rock probing can be incorporated in drill string by sizable vibration and impact, this has negative effect for probing performance.

By the rotation of drill bit, for making the instability etc. in the pumping of the motor of bit, drilling mud, drill string introduce vibration.Vibration can cause the premature failure of multiple parts of drill string, the too early blunt of drill bit, or can cause the serious damage of drilling system parts.Drillstring vibrations comprises axial vibration, oscillation crosswise and twisting vibration." axial vibration " refers to along the vibration on the direction of drillstring axis." oscillation crosswise " refers to the vibration perpendicular to drillstring axis.Oscillation crosswise occurs because drill string rotates in a curved condition usually.Two other reasons of oscillation crosswise are " forward " and " oppositely " or " reversion " whirling motion." whirling motion " refers to drill bit except rotating around himself axis also around situation about circling of holing.In backward whirling, drill bit circles along the direction contrary with the direction of rotation of drill bit." twisting vibration " that merit attention equally in subsurface boring is normally referred to as the result of the situation of " stick slip ".Stick slip occurs in situations, and the lower tubular section of drill bit and drill string is temporarily stopped the rotation (that is, blocking), and the upper tubular section of drill string continues to rotate simultaneously, thus causes drill string " distortion ", and after this, viscous element " slip " also rotates again.Usually, drill bit will be overrun when it removes distortion.

Multiple systems can be used for obtaining and processing the information relevant to drilling operation, this can contribute to improving drilling efficiency.Have developed such system, described system can receive information from the sensor near drill bit and process described information, and subsequently described information is sent to surface equipment.The vibration of bottom hole assembly can or be determined or determine at earth's surface place to other system during probing stroke in down-hole.Many systems in this system utilize finite element technique and/or finite difference theory to help analyze the drilling data comprising vibration information.

Summary of the invention

The embodiment of present disclosure comprises the method be in particular on permanent computer-readable medium, computer program and the system for predicting the vibration information of the drilling system for having drill string.Described drill string comprises the drill bit being configured to form boring during drilling operation in pedostratigraphy.Whether no matter implement via computer program or perform via system, described method all comprises the following steps: that described drilling system component information comprises one or more characteristics of described drill string via computer processor access drilling system component information; With the expection operation information being used for described drilling operation via the access of described computer processor, described expection operation information comprises the rotary speed of at least the pressure of the drill (WOB), described drill bit, bore diameter and vibration damping coefficient.Additional step comprises to be predicted the vibration information for described drill string via described computer processor, and prediction vibration information comprises at least for the amplitude of each in the axial vibration of described drill string, oscillation crosswise and twisting vibration.The prediction carried out described vibration information is carried out based on the energy balance of the described drill string according to the described expection operation information operation for described drilling operation and described drilling system component information.

Another embodiment of present disclosure is a kind of drilling system, and described drilling system is configured in pedostratigraphy, form boring during drilling operation.Described drilling system can comprise the drill string of supporting drill bit, and described drill configurations becomes to limit described boring.Described drilling system can comprise at least one calculation element, and at least one calculation element described comprises storage area, described storage area stores drilling system component information, and described drilling system component information comprises one or more characteristics of described drill string.Described storage area also comprises the expection operation information for described drilling operation, and described expection operation information comprises the rotary speed of at least the pressure of the drill (WOB), described drill bit, bore diameter and vibration damping coefficient.Described drilling system also comprises the computer processor communicated with at least one storage area, described computer processor is configured to predict the vibration information for described drill string, and prediction vibration information comprises at least for the amplitude of each in the axial vibration of described drill string, oscillation crosswise and twisting vibration.Can carry out based on the energy balance of the described drill string according to the described expection operation information operation for described drilling operation and described drilling system component information the prediction that described vibration information carries out.

Accompanying drawing explanation

Best understanding will be obtained when reading by reference to the accompanying drawings for the aforementioned summary of the illustrated embodiment of the application and following detailed description.For the object that the application is described, show illustrative embodiment in the view.But, it is to be understood that the application is not limited to shown precision architecture and means.In the view:

Fig. 1 is the schematic diagram of the subsurface boring system of embodiment according to present disclosure;

Fig. 2 A be in FIG shown in drilling system in the block diagram of calculation element that uses;

Fig. 2 B shows the block diagram of one or more calculation element of the drilling system shown in Fig. 1 and the network in drilling data storehouse;

Fig. 3 A shows the block diagram of the method according to the drilling system shown in the application drawing 1 of the embodiment of present disclosure;

Fig. 3 B shows the block diagram setting up the method for drilling system model of the embodiment according to present disclosure;

Fig. 4 shows the block diagram for revising the method for drilling system model based on the difference between prediction vibration information and measuring vibrations information;

Fig. 5 show according to the embodiment of present disclosure for revising drilling system model to reduce the block diagram of the method for the deviation predicted between vibration with measuring vibrations; With

Fig. 6 shows for the drilling system shown in application drawing 1 to obtain required penetration rate and to avoid the block diagram of the method for overvibration;

Fig. 7 is the display generated according to the illustrative computer showing the energy balance of the drilling system of the amplitude of the function as input load of present disclosure;

Fig. 8 is the display of the Practical computer teaching of exemplary vibrations model shape curve for generating according to present disclosure;

Fig. 9 is the display of the Practical computer teaching for the exemplary critical speed figure generated according to present disclosure.

Detailed description of the invention

With reference to Fig. 1, drilling system or drilling equipment 1 are configured in pedostratigraphy 3, get out boring 2 during drilling operation.Drilling system 1 comprises drill string 4, drilling data system 12 and at least one calculation element 200 for forming boring 2 in pedostratigraphy 3.This calculation element 200 can be trooped the one or more drilling operations application of (host) such as software application and so on, and described one or more drilling operation application construction becomes to perform multiple for the method for monitoring drilling operation, control drilling operation, predict and/or predict the vibration information relevant with the drill string 4 used in drilling operation the vibration information relevant to drilling operation.This calculation element 200 cooperates to perform described multiple method herein with drilling data system 12 and one or more software application.Although boring 2 is depicted as vertical boring, system and method described herein can be used for directional drilling operation, that is, horizontal drilling.Such as, drill string 4 can be configured in pedostratigraphy 3, form such boring 2, and described boring 2 is along the direction orientation transverse to the vertical axis in the earth's surface 11 with pedostratigraphy 3.

Continue with reference to Fig. 1, drilling system or drilling equipment 1 comprise the boring tower 9 supported by earth's surface 11.This boring tower 9 supports drill string 4.Drill string 4 has top 4a, bottom 4b, be arranged at the top contact (sub) 45 at the 4a place, top of drill string 4 and be arranged at the bottom hole assembly 6 at 4b place, bottom of drill string 4.Bottom hole assembly 6 comprises top 6a and bottom 6b.Drill bit 8 is attached to the bottom 6b of bottom hole assembly 6.Drilling system 1 has prime mover (prime mover) (not shown) of such as top drive or rotation platform and so on, and it is configured to rotary drill column 4 to control the moment of torsion on the rotary speed (PRM) of drill bit 8 and this drill bit 8.The rotation of drill string 4 and drill bit 8 limits boring 2 thus.By convention, pump 10 is configured to the inner passage that is pumped across by the fluid 14 of such as drilling mud and so in drill string 4 downwards.After being that drill bit 8 place is left, the drilling mud 16 returned upwards passes through the circular passage between boring 2 and drill string 4 be formed in pedostratigraphy 3 and flow to earth's surface 11.Such as the MTR 40 of spiral positive displacement pump or " Monot (Moineau) formula " pump and so on can be incorporated in bottom hole assembly 6.MTR by by pump and the flowing being centered around the drilling mud 14 around the drill string 4 in above-mentioned circular passage drive.

Drilling operation as used in this article refers to the one or more probing strokes limiting boring 2.Such as, drilling operation can comprise vertical section for limiting boring 2 the first probing stroke, for limiting the second probing stroke of the bending section of boring 2 and the 3rd probing stroke for the horizontal segment that limits boring 2.Possible more than the probing stroke of three.For the drilling operation of difficulty, for the object of hydrocarbon extraction, can complete and reach 10-15 probing stroke to limit boring 2.Should recognize, one or more bottom hole assembly can be used for each and drill stroke accordingly.System as described in this article, method, software application can be used for performing following method, and described method is monitored the vibration information in drilling operation, control and predicted and monitors the vibration information of the specific probing stroke in drilling operation, control and predict.

In the illustrated embodiment, calculation element 200 can be trooped following software application, and described software application is configured to utilize the vibration information of drilling system model to drill string 4 to predict, as by further describing hereinafter.This vibration information can comprise the axial vibration information of drill string 4, oscillation crosswise information and twisting vibration information, and the model shape of each in the particularly axial vibration of drill string 4, oscillation crosswise and twisting vibration and frequency.Should recognize, vibration mode shape representation is along the relative displacement of drill string.As the improvement for existing system, software application described herein can be predicted above-mentioned vibration information based on drill string geometry, based on expection drilling operation (such as, expection the pressure of the drill, brill rotary speed and flow velocity), applied probing load is predicted.When predicting vibration information, software application considers to determine vibration severity (severity) based on the finite element technique of frequency domain type to energy balance, as further described hereinafter.Compared with the software application utilized based on the multiple finite element technique of time-domain, the software application based on the energy balance of drilling system 1 obtains the improvement of significant processing time.As hereinafter discuss, the ability revising prediction vibration information based on the real time data from drilling operation of software application result in drilling equipment operator or design of drill person can to its respond more accurate and drilling operation information accurately.During drilling operation, software application described herein can be used for predicting the rig dysfunction (dysfunction) of expection, such as component wear and replace caused possible loss man-hour by parts, and can determine that the probing set point improved is to avoid occurring described rig dysfunction further.In addition, software application can be predicted the vibration information of drill string 4, access represents the data of measuring vibrations of drill string 4, and revises this prediction vibration information when predicting and there are differences between vibration information and measuring vibrations, as by being described in further detail below.

With reference to Fig. 1, drilling system 1 can comprise multiple sensor, and described multiple sensor arrangement becomes the drilling data measured during drilling operation and be used for using in method described in this article.Drilling data can comprise expection operating parameter, such as, for the expection operating parameter of WOB, rotary speed (RPM) and bit rotation velocity (RPM).In the illustrated embodiment, drill string top contact 45 comprises the one or more sensors for measuring drilling data.Such as, described one or more sensor can be strain gauge 48, and described strain gauge 48 measures axial load (or sling load), bending load and torsional load on top contact 45.This top contact 45 sensor also comprises three axis accelerometer 49, and the vibration at the 4a place, top of this three axis accelerometer 49 pairs of drill strings 4 senses.

Continue with reference to Fig. 1, bottom hole assembly 6 can also comprise one or more sensor, and described one or more sensor arrangement becomes to measure the drilling parameter in boring 2.In addition, this bottom hole assembly 6 involving vibrations analytical system 46, the information relevant with drilling operation that this vibration analysis system 46 is configured to based on obtaining from the sensor in boring determines various vibration parameters.Detailed description will be made further hereinafter to vibration analysis module.The form that bottom hole assembly sensor can be strain gauge, accelerometer, pressure take into account magnetometer.Such as, bottom hole assembly 6 can comprise the down-hole strain gauge 7 measuring WOB.The U.S. Patent No. 6 of " for measuring the equipment of weight on the drill bit operated in drilling well and moment of torsion " is called in name, 547,016 describes a kind of for utilizing the system of down-hole strain-ga(u)ge measurement WOB, thus, is attached to herein by the full content of this patent in the mode of reference.In addition, strain gauge 7 can be configured to measure torque-on-bit (" TOB ") and Bit bending moment (" BOB ") and WOB.In an alternative embodiment, drill string can comprise joint (non-label), and this joint combines the sensor for measuring WOB, TOB and BOB.This joint can be referred to as " WTB joint ".

In addition, bottom hole assembly sensor also can comprise at least one magnetometer 42.This magnetometer is configured to utilize the U.S. Patent No. 7 being such as called " for determining the method and system of the angular orientation of drill string " in name, 681, technology in 663 measures the instantaneous rotary speed of drill bit 8, and the full content of this United States Patent (USP) is attached to herein in the mode of reference.Bottom hole assembly sensor also can comprise the accelerometer 44 along x, y and z axes (not shown) orientation (usual scope is ± 250g), and described accelerometer 44 is configured to measure axial vibration and oscillation crosswise.Be arranged on bottom hole assembly 6 although accelerometer 44 is shown as, but what should recognize is, multiple accelerometer 44 can be installed on the multiple positions along drill string 4, make to measure the axial vibration information of the multiple positions along this drill string and oscillation crosswise information.

As mentioned above, bottom hole assembly 6 involving vibrations analytical system 46.This vibration analysis system 46 is configured to receive the data relevant with oscillation crosswise to the axial vibration of drill string 4 from accelerometer 44.Based on the data received from accelerometer, this vibration analysis system 46 can determine the measuring amplitude of the axial vibration of the position of the accelerometer on drill string 4 and model shape and the measuring amplitude of oscillation crosswise that causes due to forward and backward whirling and model shape.The measuring amplitude of the measuring amplitude of axial vibration and frequency and oscillation crosswise and frequency can be referred to as measuring vibrations information.Described measuring vibrations information can also be transferred into earth's surface 11 and be processed by drilling data system 12 and/or calculation element 200.This vibration analysis system 46 can also receive to drill string in the relevant data of the instantaneous rotary speed of magnetometer 42 position from magnetometer 42.This vibration analysis system 46 determines amplitude and the frequency of the twisting vibration caused due to stick slip subsequently.Measuring frequency and the amplitude of actual twisting vibration is determined by the difference calculated between the maximum instantaneous rotary speed of drill string in preset time section and minimum instantaneous rotary speed.Thus, measuring vibrations information can also refer to measure twisting vibration.

According to present disclosure, in order to reduce the data transmission for vibration information, drilling data can be grouped into scope and the plian value for representing the data in these scopes.Such as, Oscillation Amplitude can be reported into 0,1,2 or 3 to represent normal vibration, high vibration, judder or threshold vibration respectively.One for reporting that the method for frequency is the value of giving such as vibration frequency by numeral 1 to 10, make value 1 represent the frequency be in 0 to 100Hz scope, numerical value 2 represents the frequency etc. be in 101 to 200Hz scope.Vibration mode, by distributing numeral 1 to 3, makes such as numerical value 1 represent axial vibration, and 2 represent oscillation crosswise, and 3 represent that twisting vibration is reported.If only the vibration data of this abbreviation is sent to earth's surface, then such as can perform being arranged in the processor in bottom hole assembly 6 with at least some data analysis of the Fourier analysis that backward whirling frequency is used for determining that bore diameter is combined and so on.{ note: current, we do not do like this, but considered implementing it in the future }

Bottom hole assembly sensor also can comprise at least the first pressure sensor 51 and the second pressure sensor 52, and the pressure of the drilling mud of the drilling system parts flow through in boring 2 measured by described first pressure sensor 51 and described second pressure sensor 52.Such as, the pressure that (along boring downwards) flows through the pressure of the drilling mud of drill string 4 and the drilling mud along the annular gap upwards flowed through between drill hole wall and drill string 4 of holing measured respectively by the first pressure sensor 51 and the second pressure sensor 52.Differential pressure is considered to the pressure differential holed between the drilling mud flowed downward and the drilling mud upwards flowed along holing in edge.Sometimes, differential pressure can be considered to leave the pressure in shaft bottom and the difference between the pressure in shaft bottom, as is known in the art.Pressure information can be transferred into drilling data acquisition system 12 and/or calculation element 200.In the illustrated embodiment, the first pressure sensor 51 and the second pressure sensor 52 can be bonded in vibration analysis system 46.

In addition, drilling system 1 also can comprise the one or more sensors be arranged on boring tower 9.Such as, drilling system can comprise sling load sensor 30 for determining WOB and the additional sensor 32 for the drill string rotating speed that senses drill string 4.The suspended weights of sling load sensor 30 such as by utilizing the tension force in strain-ga(u)ge measurement winch cable (non-label) to measure drill string.This cable extends through three supporting members and known lateral displacement is applied on this cable by described supporting member.The size of the lateral strain that strain-ga(u)ge measurement causes due to the tension force in cable, the size of this lateral strain is subsequently for calculating axial load and WOB.In another embodiment, electronic data recorder (EDR) can be utilized to obtain drilling data.This EDR can measure operation load at earth's surface place.Such as, EDR can utilize sensor measurement sling load (tensioning load of the drill string at earth's surface place), moment of torsion, pressure, differential pressure, rotary speed, flow.The pressure of the drill (WOB) obtains from the change calculations leaving shaft bottom to shaft bottom by sling load, drill string weight and load.Moment of torsion is measured by motor current consumption.Flow can based on the volume of pump stroke number and every stroke pumping.Differential pressure is the difference between bottom pressure and the pressure leaving shaft bottom.

As by being described in further detail below, this drilling data system 12 can be the calculation element with calculation element 200 electronic communication.This drilling data system 12 is configured to receive, process and store the multiple drilling operation information obtained from above-mentioned downhole sensor.Therefore, drilling data system 12 can comprise the multiple system and method for transmitting data between upsilonstring components and drilling data system 12.Such as, in wired pipe embodiment, the data from bottom hole assembly sensor are transferred into top contact 45.From top contact 45 sensor data and wireless telemetering art can be utilized from the data of the bottom hole assembly sensor in wired pipe systems and be transferred into drilling data system 12 or calculation element 200.A this method for wireless telemetering art is openly that the name submitted on February 20th, 2009 is called the U. S. application No.12/389 of " the synchronous telemetry from rotating element ", in 950, the full content of this U. S. application is incorporated into herein in the mode of reference.In addition, drilling system 1 can comprise mud-pressure-pulse telemetry system.Such as, mud-pulse device 5 can be incorporated in bottom hole assembly 6.This mud-pressure-pulse telemetry system by such as from the data encoding from downhole hardware of the vibration information and so on of vibration analysis system 46, and utilizes pulser 5 that coded pulse is sent to earth's surface 11.In addition, the alternate manner that drilling data can utilize such as acoustics transmission or electromagnetism to transmit and so on is sent to earth's surface.

With reference to Fig. 2 A, any applicable calculation element 200 all can be configured to software application of trooping, for monitoring vibration information, control and predicting as described herein.It will be understood that, calculation element 200 can comprise any suitable device, the example of described any suitable device comprises desk-top computer, server computational device or portable computing, such as notebook, panel computer or smart mobile phone.In representative configuration in fig. 2, calculation element 200 comprises processing section 202, storage area 204, I/O part 206 and user interface (UI) part 208.It is emphasized that the block diagram description of this calculation element 200 is exemplary and and is not intended to imply specific embodiment and/or structure.Processing section 202, storage area 204, I/O part 206 and user interface part 208 can be coupled together to allow to communicate betwixt.As should be recognized, the arbitrary parts in above-mentioned parts all can cross the device of one or more separation and/or position distributes.Such as, in processing section 202, storage area 204, I/O part 206 and user interface part 208 any one all can with drilling data system 12 electronic communication, this drilling data system 12 can be the calculation element similar to calculation element 200 as described herein as mentioned above.In addition, any one in processing section 202, storage area 204, I/O part 206 and user interface part 208 all can receive drilling data from the vibration analysis system 46 be arranged on drill string 4 and/or one or more sensor.

In multiple embodiment, I/O part 106 comprises the receiver of calculation element 200, the conveyer of calculation element 200 or for the electric power connector of wired connection or its combination.This I/O part 206 can receive and/or provide carries out to the network with such as Internet and so on the relevant information that communicates.As should be recognized, transmission and receiving function can also be provided by one or more devices of the outside being positioned at calculation element 200.Such as, I/O part 206 can be arranged on downwards one or more sensor on bottom hole assembly 6 and/or data collecting system 12 electronic communication with along holing.

Depend on exact configuration and the type of processor, storage area 204 can be volatibility (random access memory (RAM) of such as some type), non-volatile (such as read-only storage (ROM), flash memory etc.) or its combination.Calculation element 200 can comprise annex memory (such as, removable memory and/or read-only storage), described annex memory includes but not limited to tape, flash memory, smart card, CD-ROM, digital versatile disc (DVD) or other optical memory, cassette, tape, magnetic disc store or other magnetic memory apparatus, USB (USB) compatible memory or can be used for storage information and other medium any that can be accessed by calculation element 200.

Calculation element 200 can comprise user interface part 208, this user interface part 208 can comprise input unit 209 and/or display 213 (input unit 210 and display 212 not shown), and this user interface part 208 makes user can communicate with calculation element 200.User interface 208 can comprise input unit, described input unit is provided for the ability carrying out controlling calculation device 200 via the motion, visual cues (the video camera reach such as, on calculation element 200 is started) etc. of such as button, soft keyboard, mouse, sound movement controller, touch screen, calculation element 200.User interface 208 can provide output, and described output comprises visual information, such as, via the visual representation of display 213 for multiple opereating specifications of one or more drilling parameter.Other output can comprise audio-frequency information (such as, via loudspeaker), mechanical information (such as, via vibrating mechanism) or its combination.In multiple structure, user interface 208 can comprise display, touch screen, keyboard, mouse, accelerometer, motion detector, loudspeaker, microphone, video camera or its any combination.User interface 208 can also comprise the biometric information for inputting such as finger print information, retinal information, acoustic information and/or face feature information and so on to obtain any applicable device of the concrete biometric information for access computation device 200.

With reference to Fig. 2 B, show the exemplary and communication architecture be suitable for, this communication architecture can contribute to the drilling operation of monitoring drilling system 1.This exemplary architecture can comprise one or more calculation element 200,210 and 220, and each in described one or more calculation element all can via the communication network 240 shared and database 230 and drilling data acquisition system 12 electronic communication.Separate with calculation element 200 although be shown schematically as, database 230 also can be the parts of the storage area 104 of calculation element 200.Should recognize, multiple applicable alternative communication architecture can be dreamed up.When probing being controlled and monitoring and measuring application is installed on the calculation element 200 of such as above-mentioned calculation element and so on, it can transmission of information between other calculation element on the community network 240 of such as Internet and so on.For present construction, the information relevant with one or more drilling parameter can be sent to the calculation element 210 of the supplier of bottom hole assembly 6 by user 24 via network 240, or cause this transmission to occur, or as selecting the calculation element 220 via network 240, described information being passed to another third party (such as, the drilling system owner 1).Third party can check multiple opereating specifications for one or more drilling parameter as described herein via display.

The calculation element 200 described in Fig. 2 B and database 230 or such as can provide other service provider of the third party of design of drill service and so on to operate wholly or in part by any manufacturer or the supplier of such as on-the-spot drilling equipment operator, the on-the-spot owner, probing company and/or drilling system parts.As should be recognized, above-mentioned each party and/or other related side can operate any amount of corresponding computer and can utilize any amount of network internal ground of wide area network (WAN) or the LAN (LAN) comprising such as such as Internet and so on and externally communicate.Database 230 can such as storing to one or more drilling parameter, from the relevant data of multiple opereating specifications of last probing stroke, current probing stroke and the data relevant with the model for upsilonstring components.In addition, what should recognize is, as used herein " access " information that acquisition is again stored in the storage area of local computing de can be comprised, or via network, instruction is sent to remote computing device, be transferred into the storage area of local computing de for local IP access to cause information.In addition or as selecting, access can comprise accesses the information that is stored in the storage area of remote computing device.

Be back to Fig. 3 A, according to illustrated embodiment, start the method 50 being used for monitoring drilling data and the prediction vibration information for drilling operation, controlling in step 100.In step 100, user can input probing parts data.Such as, user specifies upsilonstring components, such as bottom hole assembly or measurement while drilling (" MWD ") instrument, and is applicable to the vibration mark of each this parts.Drill string and/or bottom hole assembly data are by operator's input or be stored in database 230 or in the memory of calculation element 100.Bottom hole assembly data can as mentioned above by software applications access.The data inputted in step 100 can comprise:

I () forms external diameter and the internal diameter of the drill pipe of drill string,

(ii) position of stabilizer,

(iii) length of drill string,

(iv) angle of inclination of drill string,

V () uses angle of bend when crooked joint,

(vi) material behavior, particularly modulus of elasticity, density of material, modulus of torsion and poisson's ratio,

(vii) for the characteristics of mud of vibration damping, particularly mud weight and viscosity,

(viii) along the bore diameter of the length of drilling well,

(ix) azimuth, construction speed and steering rate,

The diameter of (x) stabilizer and drill bit, and

(xi) to stratum such as move towards the information relevant with the characteristic at inclination angle and so on.

In an alternative embodiment, during step 100, the information relevant to upsilonstring components can also be upgraded by operator when adding the new pipeline section of drill string at every turn or when starting new probing stroke.

In a step 101, can be transfused in software application for the expection operation information of drilling operation and to be stored in as required in drilling data system or calculation element 100.Expection operation information can be exported at the scene or can be determined by according to drilling plan.The diameter that expection operation information comprises (i) WOB, (ii) drill string rotating speed, (iii) MTR rotary speed, (iv) hole and (v) damped coefficient arbitrarily.

In a step 102, the vibration information of software application to drill string is predicted.Prediction vibration information comprises the amplitude of each in the axial vibration of at least drill string 4, oscillation crosswise and twisting vibration.As will be described in further detail below and in figure 3b shown in, the prediction carried out vibration information is carried out based on the energy balance method of the drill string operated according to the expection operation information for drilling operation and drilling system component information.In addition, predict that vibration information can comprise frequency and model shape information.During step 102, software application also can start the one or more analyses for using in forecast model discussed hereinafter.Especially, software application can carry out static buckling analysis to determine the bending information of bottom hole assembly 6.Described bending information comprises the bottom hole assembly amount of deflection, lateral force, moment of deflection and the nominal bend stress along the length of bottom hole assembly that calculate.Software application also performs so-called " forecast analysis ", and wherein, it utilizes bending analysis information will carry out probing direction to drill string and predicts.

At step 104, software application to be warned boundary based on the vibration calculated for specific upsilonstring components of the vibration information by the sensor measurement in vibration analysis system 46.Such as, as hereinafter discuss, based on predictive mode shape, software application can determine which kind of magnitude of the measuring vibrations in accelerometer position can cause overvibration in the drill string position of crucial upsilonstring components.

In step 106, drilling operation proceeds or starts this drilling operation.Such as, such as step 100 to 104 and so on one or morely can be activated in first step, to contribute to working out drilling plan and to help planned well bottom component before drilling operation.

In step 108, software application can receive drilling data from drilling equipment surface sensor.In step 109, software application can receive drilling data from downhole sensor.Should recognize, drilling equipment earth's surface drilling data and down hole drill data can be stored in the computer storage in drilling data system 12 and/or calculation element 200.Drilling data from drilling equipment surface sensor and downhole sensor can be sent to drilling data system 12 by communication system.Drilling data from surface sensor is preferably continuously transferred to described system 12.As long as down hole drill data to be sent to earth's surface (preferably at least often several minutes), just the drilling data from downhole sensor is sent to drilling data system 12.Software application can access drilling equipment earth's surface drilling data and down hole drill data subsequently.No matter whether software application accesses or receives drilling data, and drilling data all can be used continuously by software application during drilling operation.

In step 110, drilling data and drilling state can be transferred into remote computing device, such as remote computing device 210 (Fig. 2 B).The user not being arranged in group drilling equipment scene can such as by signing in calculation element 210 and accessing this drilling data via the communication network 240 of such as Internet and so on and download and check described data.In step 112, software application determines whether any one being input in the drilling parameter in software application changes.If drilling parameter changes, therefore software application just upgrades drilling data.In addition, if drilling parameter not yet changes, then in square frame 114, selectable loss performance evaluation can be run, described selectable loss performance evaluation such as with the U.S. Patent No. 8,453 be attached in the mode of reference herein, it is similar to lose performance evaluation disclosed in 764.Process control can be transferred and the method 701 shown in Fig. 5 can be activated, as by being described in further detail below.

Turn to Fig. 3 B, Fig. 3 B shows a kind of method 70 for predicting the vibration information of drilling system.Should recognize, this aspect of method 70 can be performed by before above-mentioned steps 100 to 102 or together with it.Fig. 3 B shows and how can develop and in drilling operation, use drilling system model.Therefore, each step of method 70 all without the need to on-the-spot at drilling equipment or perform during drilling operation, but can be carried out before drilling operation.

Continue Fig. 3 B, method 70 starts by utilizing finite element technique to limit drilling system model in step 260, as described in further detail below.In step 260, described method can comprise access drilling system parts data.Described drilling system parts data comprises one or more characteristics of the drill string usually used in FEM (finite element) model.Described one or more characteristic of drill string comprises drill string geometric data.Drill string geometric data comprises the diameter of the external diameter of drill pipe that forms drill string and internal diameter, the position of stabilizer, the length of drill string, the angle of inclination of drill string, angle of bend, stabilizer and drill bit when using crooked joint.Drill string geometric data also comprises the material behavior of upsilonstring components, particularly modulus of elasticity, density of material, modulus of torsion and poisson's ratio, and the vibration damping coefficient of characteristic based on drilling mud characteristic, described drilling mud characteristic particularly mud weight and viscosity.In step 262, software application may have access to drill hole information.Drill hole information can comprise along the bore diameter of length of boring, azimuth, construction speed, steering rate, to stratum such as move towards the information relevant with the characteristic at inclination angle and so on.

Continue Fig. 3 B, in step 266 is to 272, the parts of drilling system model are utilized the finite element system of such as ANSYS and/or LISA and so on to process further.In step 274 is to 280, perform static buckling analysis and so-called forecast analysis.In step 282, based on the bending information determined in step 274-280, software application determines whether the power at drill bit place balances.In step 282, software application can determine whether the lateral force on drill bit equals zero.Such as, if the power on drill bit lack of equilibrium, then described model shows to contact with (in described model) drill hole wall.If described power uneven, then process control be transferred to step 284 and change the curvature of boring, and operating procedure 272 to 282 again, until obtain balance in step 282.

In step 286 is to 294, the vibration information of software application to drill string is predicted.In step 286, software application Vibration on Start-up analysis operation.Such as, software application Vibration on Start-up model analysis.Prediction vibration information comprises the amplitude of the axial vibration of drill string, oscillation crosswise and twisting vibration.In addition, the frequency for axial vibration, oscillation crosswise and twisting vibration and model shape is worked out.The prediction carried out vibration information is carried out based on the energy balance of the drill string according to the operation of expection operation information and drilling system component information, as by being described in further detail below.

In step 288, software application can the probing exciting force of first Confirming model upsilonstring components.In step 289, the probing exciting force determined is applied to this model by software application.Such as, known Vibrating Load can be applied to drill string based on the expection operation load of drill string and frequency by software application.

In step 209, software application applied energy balance method, to determine the vibration information along drill string, particularly determines the amplitude along the axial vibration of drill string, oscillation crosswise and twisting vibration.Utilize energy balance method, consider the energy dissipated due to the vibration of drilling system parts during drilling operation, prediction vibration information is based on the analysis carried out the energy being supplied to drilling operation of function as the one or more power being applied to drill string.The ENERGY E S (J) supplied to drilling system calculates by following equalities:

(1)E _S＝q·π·Cosβ·∫y(x)·dx

In formula,

Q is the distributed force (N) along drill string,

β is phase angle (radian), and

Y (x) is the displacement (mm) of the length along drill string.

The ENERGY E D (J) dissipated from drilling system due to damping etc. calculates by following equalities:

(2) ED=π kbY ², in formula,

K is spring rate,

B is damped coefficient (N s/m), and

Y is displacement (mm).

The ENERGY E S supplied graphically illustrated as displacement or amplitude as the function of input load is shown in Figure 7 with the ENERGY E D dissipated.Suppose that supplied energy is equal with dissipated energy, software application can be predicted the amplitude of the vibration under given input load (or the displacement in equation).Based on the hypothesis that energy is balanced, software application utilizes the amplitude of following equalities to axial vibration to predict:

(3) Ym=(F _oπ S _z)/(δ w ²) H _na, in formula,

Ym is amplitude peak for axial vibration or displacement (mm),

F _ototal power (N),

S _zbe magnification factor, it is restricted to and represents the degree of approach of required frequency for the natural frequency of the structure of such as upsilonstring components and so on,

δ is displacement (mm),

W is angular velocity (radian per second), and

Hna is the relative mode shape efficiency factor for axial vibration.

As can be seen from above-mentioned equation, software application is based on showing for the relative mode shape efficiency (H along the axial vibration of drill string, oscillation crosswise and twisting vibration _n) information vibration information is predicted.This model shape efficiency is for there being how many energy from applied load to enter into measuring of vibration.Such as, this mode efficiencies for semi girder when being the highest by load applying to the first mode when free end of this semi girder, this is because this vibration is maximum.Load applying to the fixed end of this beam be result in be 0 the mode efficiencies factor, this is owing to there is not any displacement in this position.

In step 290, when considering bit whirl, software application can also be predicted the amplitude of vibration.Utilize above-mentioned energy balance method, software application utilizes the amplitude of following equalities to oscillation crosswise to predict:

(4) Yo=(Y _b. π S _z)/(δ w ²) H _nl, in formula

Yo is amplitude peak or the displacement (mm) of oscillation crosswise,

Y _bdisplacement (mm),

S _zbe magnification factor as above, δ is displacement (mm),

W is angular velocity (radian per second), and

H _nlthe relative mode shape efficiency factor for oscillation crosswise, as mentioned above.

In step 290, consider drill bit moment, software application can also be predicted the amplitude of vibration.Utilize above-mentioned energy balance method, software application utilizes the amplitude of following equalities to twisting vibration to predict:

(5) θ _m=(M _b. π S _z)/(δ w ²) Hnt, in formula

θ _mit is the maximum angular displacement (radian per second) for twisting vibration

M _bmoment of deflection (N-m),

S _zamplification factor as above,

δ is displacement (mm)

W is angular velocity (radian per second),

Hn is as above for the relative mode shape efficiency factor of oscillation crosswise.

In step 290, when energy balance method carried out prediction to the amplitude of axial vibration, oscillation crosswise and twisting vibration, in step 292, the exportable Oscillation Amplitude for a series of bit rotation velocity of software application.Process control can be transferred to step 294.In step 294, software application can determine the critical speed of drill string.Determine that the step of critical speed comprises the critical speed of the function determined as the load be applied on drill string.Should recognize, software application can by prediction vibration information be used for a series of critical speeds of drilling operation, a series of WOB, rotary speed, flow and torque value and be associated.

According to another embodiment of present disclosure, software application is configured to upgrade this drilling system as required.First software application by limiting drill string and during drilling operation and unaltered data of holes drilled works out drilling system model.Drill string and data of holes drilled are stored in the computer storage of calculation element 200.When drilling operation continues and specific drilling conditions changes, drill string and data of holes drilled are modified and again analyze.Such as, the drilling parameter changed during drilling comprises bit rotation velocity, WOB, angle of inclination, the degree of depth, azimuth, mud weight and bore diameter.Software application based on the measurement based on surface sensor and downhole sensor of drilling operation parameter instantaneous value access and/or receive the operation information upgraded.Such as, the operation information of the renewal of software application accessible storage in the storage area of data collecting system and/or calculation element.The operation information upgraded automatically can be carried out measuring and is stored in memory, or as selection, the operation information upgraded can obtain via independent system and can be the data manually inputted in calculation element via user interface, and described data are stored for access.Based on the operating parameter upgraded, software application calculates the critical speed being used for sequence of operations situation.Software application can also set up for each in axial vibration, oscillation crosswise and twisting vibration measuring vibrations information and prediction vibration information model shape.As shown in FIG. 4, the model shape under software application can cause user interface display to be in any given combination of RPM and WOB.In addition, software application can cause user interface to show critical speed on critical speed figure.As shown in FIG. 5, software application causes bit rotation velocity (RPM) to be presented in x-axis, and causes WOB to be presented in y-axis.

Turn to Fig. 4, according to another embodiment of present disclosure, as shown in integrating step 102 (method 70), software application performs vibration analysis, in described vibration analysis, it to following parameters predict the natural frequency of the drill string in (i) axial mode, transverse mode and torsional mode and (ii) drill string, MTR (if existence) critical speed and excite the critical speed of drill bit of these frequencies, as previously mentioned.Software application can when actual critical speed be shifted from predicted critical speed, and regulate described drilling system model, the critical speed that drilling system model can be experienced drill string carries out correct Prediction.As can finding in the diagram, software application executing method 300, the described method 300 predicted critical speed that can be in during practical operation under bit rotation velocity (RPM) shows this predicted critical speed and does not cause regulating this probing to be model when resonance.If do not predict at drilling system model and run into critical speed under the bit rotation velocity residing for resonance, then can regulate described drilling system model equally subsequently.What should recognize is, can complete after successfully eliminating high vibration the adjustment that critical speed is carried out based on the analysis relative with actual critical speed carried out predicted critical speed, described height vibration causes probing property loss of energy, as integrating step 114 hereinbefore discuss.

Continue Fig. 4, software application determines whether predicted critical speed exceeds scheduled volume with the difference measuring critical speed first in a step 330.If so, in step 332, software application just determines whether the vibration mode be associated with critical speed is associated with axial vibration pattern, lateral vibration mode or torsional vibration mode.If critical speed is associated with torsional mode or axial mode, so in step 334, software application just determines whether imagination MTR residing RPM that operates when not running into prediction resonance is on the low side of predicted critical speed band.If so, so just in step 336, be just lowered until critical speed is no longer predicted by the motor RPM that this model uses.This considers the motor compared with the situation described in the specification file for motor with different per gallon revolutions (RPG).Motor specification lists the RPG be at room temperature under unloaded condition usually.If determining motor RPM is on the upper end of predicted critical speed band, so just in step 338, motor RPM is increased, until this critical speed is no longer predicted.If do not use MTR, so just in step 340, software application determination predicted critical speed is higher or low than the speed residing for drill bit running.If it is higher, just in step 342, reduce drill string stiffness, until this critical speed is no longer predicted.If it is lower, so just in step 344, drill string stiffness is increased, until this critical speed is no longer predicted.

If this critical speed is associated with lateral vibration mode, so just in step 346, whether software application determination oscillation crosswise is because drill bit, MTR or drill string oscillation crosswise caused.If lateral vibration mode is associated with drill string, so just in step 348, software application determine imagine drill string operate when not running into resonance residing RPM be in predicted critical speed band low side or high-end on.If it be in high-end on, so in step 350, reduce the drill string speed used in the model, if or unsuccessful, just increase stabilizer external diameter.If it is on low side, so just in step 352, increase the bore size used in the model, if or unsuccessful, just reduce the external diameter of stabilizer.

If lateral vibration mode is associated with MTR, so in step 354, software application determine imagine MTR operate when not running into resonance residing RPM be in predicted critical speed band low side or high-end on.If it be in high-end on, so in step 356, improve the MTR speed that uses in the model, until this critical speed is no longer predicted.If it is on low side, so in step 358, reduce the MTR speed used in the model, until this critical speed is no longer predicted.If lateral vibration mode is associated with drill bit, so in step 360, software application determine imagine drill bit will operate residing RPM be in critical speed band low side or high-end on.If it be in high-end on, so just in step 362, reduce bit speed, until this critical speed is no longer predicted.If it is on low side, so just in step 364, increase bit speed, until this critical speed is no longer predicted.

As mentioned above, software application can be predicted the vibration of drilling stroke future based on the real time information obtained during current probing stroke.Such as, software application can be predicted vibration information based on when pre-test operation or real-time parameter.Software application can utilize said method to predict based on the vibration of instantaneous value to each the element place along drill string of following parameters, described parameter is: (i) WOB, and the diameter that (ii) drill bit RPM, (iii) MTR RPM, (iv) hole, (v) angle of inclination, (vi) azimuth, (vii) build speed and (viii) steering rate.For the object predicted vibration, WOB preferably utilizes top drive joint 45 to be determined by earth's surface measurement, as previously mentioned, although can use down-hole strain gauge as previously mentioned.Drill bit RPM adds MTR RPM to determine preferably by by drill string RPM.Drill string RPM preferably utilizes RPM sensor 32 to carry out based on earth's surface measurement.MTR RPM preferably utilizes the curve of motor flow to motor RPM or RPM/ flow factor to carry out based on mud flow rate.The diameter of boring preferably utilizes in above-mentioned U.S. Patent No. 8,453, and the method described in 764 is determined by backward whirling frequency, although also can use assumed value, equally as previously mentioned.Angle of inclination and azimuth are determined preferably by the accelerometer 44 in bottom hole assembly 6 and magnetometer 42, as previously mentioned.Build speed preferably to determine based on the change in angle of inclination.Steering rate is determined by the change in azimuth.Preferably, the information about WOB, drill string RPM and MTR RPM is automatically sent to processor 202.Transferred to processor 202 about angle of inclination and azimuthal information and from the data (the backward whirling frequency when down-hole performs Fourier analysis) of lateral vibration acceleration meter at regular intervals by by mud-pressure-pulse telemetry system or wired pipeline or other transmission system, or be transferred to processor 202 when being employed to require or when being triggered by event.Based on afore-mentioned, software application calculates during drilling operation along the vibration frequency (amplitude is formerly determined) at the every bit place of drill string.As mentioned above, software application can cause user interface display for the image of the model shape of current operating situation, and as shown in Figure 5, the image of the vibration mode shape of display drill string, this is in fact the Relative Vibration amplitude along drill string.

According to present disclosure, three vibration exciting forces are used for predicting vibration level: (i) vibrates exciting force, its value measures WOB, and the speed that its frequency equals drill bit is multiplied by the quantity (this power puts on the center line of drill bit and excites axial vibration) of the blade/gear wheel (cone) on drill bit, (ii) oscillating force, its value measures WOB, and the quantity of the wheel blade (or blade) that its frequency equals on drill bit is multiplied by bit speed (this power puts on the outer radius of drill bit and forms the moment of deflection exciting oscillation crosswise), (iii) oscillating force, its value is the out-of-balance force gone out based on the property calculation of MTR, as previously mentioned, and its frequency equals N (n+1), in formula, N is the rotary speed of rotor and n is the quantity of epitrochanterian rotor blade (lobe).

Measure above-mentioned with reference to the Oscillation Amplitude in equation or displacement in the position of the vibrating sensor of such as accelerometer and so on.But, the vibration of the importantly position of the crucial upsilonstring components of such as MWD instrument and so on for operator.At step 104, software application is determined for the ratio between the Oscillation Amplitude at sensing station place near each vibration mode and the Oscillation Amplitude at critical component place.Analysis is at step 104 carried out based on prediction vibration mode shape and the known location as the upsilonstring components of this key inputted in the model.Based on the inputted vibration limit for these parts, the vibration at software application determination sensor place, described vibration reaches its limit by causing the vibration at parts place.Software application can cause calculation element to start high vibration alarming when the vibration at sensor place arrives related limit.Such as, if the maximum vibration that MWD instrument should be subjected to is 5g, and model shape analysis shows, for oscillation crosswise, the Oscillation Amplitude at sensor #1 place and the ratio of MWD instrument are 1.5-namely, the Oscillation Amplitude at MWD instrument place is 1.5 amplitudes being multiplied by sensor #1 place, then software when the measurement oscillation crosswise at sensor #1 place is more than 1.33g, can notify that operator exists high vibration at MWD instrument place.This extrapolation can represent that multiple positions execution of multiple crucial upsilonstring components, each position all have the vibration mark of himself.Except predicting the vibration of the length along drill string under current operating situation to infer except the measuring vibrations amplitude of other position of drill string, software application can also be predicted based on the vibration of expectation operating conditions to the length along drill string.Software application can determine whether the change in the operating parameter of such as RPM or WOB and so on is vibrated impact subsequently.

Software application can cause user interface to show critical speed figure in computer display, as shown in FIG. 5 and as further discussed below.As mentioned above, critical speed can show following message, and described information shows that the combination of WOB and the drill string rotating speed avoided is to avoid occurring high axis or lateral vibration or stick slip.Software application can cause user interface to show to comprise the critical speed figure of following message, and described information shows should by the combination of the WOB that avoids and MTR rotary speed.Critical speed figure can be used as the guide for setting drilling parameter.

Turn to Fig. 5, according to another embodiment of present disclosure, software application can determine whether exceeding predetermined threshold for the difference between the prediction vibration of any one in the axial vibration at sensing station place, oscillation crosswise or twisting vibration and measuring vibrations.As response, software application revises this drilling system model, until described difference is reduced to lower than predetermined threshold by changing the operating parameter input used in drilling system model according to predetermined system (hierarchy).This exemplary system is depicted in the method 701 shown in Fig. 5.When software application from downhole sensor receive drilling data time, software application by the measuring vibrations magnitude at sensing station place compared with the prediction vibration level at same position place.Based on the analysis performed by software application as above, drilling data system 12, calculation element 200, and/or database 230 can comprise stored therein: the measurement axial vibration of the position of (i) downhole sensor, measure oscillation crosswise and measure twisting vibration, (ii) by software application predict for axial vibration, the resonance frequency of oscillation crosswise and twisting vibration, (iii) based on the real time operational parameter predicted by software application for axial vibration, the model shape of oscillation crosswise and twisting vibration, (iv) axial vibration of each point in the total length along drill string predicted by software application, the magnitude of oscillation crosswise and twisting vibration.This information is for determining that how consistent prediction vibration information is with measuring vibrations information.

Continue Fig. 5, using method 701, in the method 701, the system of attempting in the parameter changed is preferably MTR rotary speed, succeeded by WOB, succeeded by bore size.In step 700, judge measuring vibrations and predict whether the deviation between vibrating exceeds predetermined threshold amount.If exceeded, just in step 702 is to 712, attempt MTR rotary speed the increasing progressively and successively decreasing in the excursion that regulation allows carrying out using in drilling system model, until described deviation is declined to become lower than described threshold amount.If do not have the value of MTR rotary speed to cause discussed vibration deviation to be declined to become lower than described threshold amount in permission excursion, then the MTR rotary speed used in drilling system model is modified to and makes described deviation reduce at most but do not cause the deviation between predicted value and measured value vibrated for another to exceed the numerical value of threshold amount by software application.

If described deviation is not reduced to lower than threshold amount by the change of MTR rotary speed, then in step 714-724, reduce in the excursion that regulation allows subsequently and increase the WOB used in drilling system model, until described deviation is lowered into lower than described threshold amount.If do not have the value of WOB to cause measuring vibrations in the excursion allowed and predict that the deviation between vibrating is lowered into lower than described threshold amount, then the WOB used in the model is modified to and makes described deviation reduce at most but do not cause the deviation between predicted value and measured value vibrated for another to exceed the numerical value of described threshold amount by software application.

If described deviation is not reduced to lower than described threshold amount by the change of WOB, then in step 726-736, reduce in the excursion that regulation allows subsequently and increase the supposition bore size that uses in the model---whether described scope can be considered to suspect and violent wash away situation, when this violent wash away situation, diameter can be the twice of predicted size---until deviation is lowered into lower than described threshold amount.If the numerical value of bore size causes this deviation to be lowered into lower than described threshold amount, and do not cause the deviation in another vibration to exceed described threshold amount, so just new bore size value is reflected to this model correction.If do not have the numerical value of bore size to cause measuring vibrations in permission excursion and predict that the deviation between vibrating is lowered into lower than described threshold amount, then the bore size used in the model is modified to and makes described deviation reduce at most but do not cause the deviation in another vibration level to exceed the numerical value of described threshold amount by software.As selection, substitute utilize above-mentioned continuous univariate method, software application can be programmed to utilize such as field mouth (Taguichi) method to perform multivariable minimization.In addition, if the change of MTR RPB, WOB and bore diameter is not individually or be lowered into lower than described threshold value in the mode combined by described deviation, whether then can require further study to determine in inputting one or more is invalid, or whether down-hole has problems, such as, junk (such as bit slug) in the drill bit of blunt, boring or excessive (chunked out) motor (rubber caves in).

Should recognize, other system can be used for revise drilling system model.Such as, if be such as attached to U.S. Patent No. 8 herein in the mode of reference, 453, after success described in 764 alleviates high vibration (step 114 in such as Fig. 3 A), being performed by software application will the step of prediction vibration compared with measuring vibrations, described in the result that alleviates for guiding the correction carried out the drilling system model for predicting described vibration.As by by one of ordinary skill in the art recognize, if attempt carrying out to alleviate be unsuccessful or if to alleviate not be required, then can not utilize the method alleviating and vibrated caused loss performance by height.

Referring now to Fig. 6, according to an embodiment again of present disclosure, software application determines whether to obtain best probing performance automatically, and recommends when not yet obtaining best probing performance.Generally speaking, drill bit RPM is higher and WOB is larger, then the penetration rate be drilled in stratum by drill bit is higher, thus causes drilling more fast.But increase drill bit RPM and WOB and can increase vibration, this can shorten the service life of bottom hole assembly parts.The initial step 900 performing one or more probing tests is comprised, the database compared with drill string and drill bit RPM with WOB that described probing test is performed to obtain ROP for making drilling efficiency method for optimizing 901.In addition, in step 900, described probing test can start from the prerun analysis utilizing software application to carry out drilling operation.Described prerun analysis can be used for designing following bottom hole assembly, and described bottom hole assembly will get out plan drilling well, has enough large intensity for planning drilling well and to avoiding the critical speed occurred to predict during drilling operation.During analytic process in advance, the parts of drill string can be moved or change to obtain estimated performance.Change can comprise interpolation, delete or mobile stabilizer, select drill bit and the power section of regulation MTR, bending position and angle of bend based on vibrational excitation and performance.Based on described analysis, setting initial probing component information and drilling operation parameter.

In step 902, software application can determine one group of drilling parameter, and described one group of drilling parameter part can be optimized ROP based on the prediction vibration level carried out at probing duration of test and probing results of property and can not produce overvibration.As selection, software application can produce figure display, and described figure shows the prediction axial vibration relative with WOB and the measurement penetration rate relative with WOB.Utilize these figures to show, operator selectable selects the WOB that can not cause excessive axial vibration by causing maximum penetration rate.For other vibration mode, similar figure can be produced.In addition, during step 902, the critical speed of software application determination drill string also determines the operation whether operation under the drill string/bit rotation velocity producing the highest ROP based on probing experimental data and WOB will cause under critical speed subsequently.As selection, software application can be predicted the magnitude of the vibration at the critical component place under drill string/drill bit RPM and WOB producing the highest ROP in drill string, to determine whether operation in this condition will cause the overvibration of critical component.Under any circumstance, if software application predicts vibration problem under the operating conditions causing the highest ROP, then it will check the height vibration under other operating conditions obtaining data in probing test subsequently, until it determines the operating conditions that can not run into high vibration by causing the highest ROP.Software application operates drill string under suggestion operations person subsequently should being produced the highest ROP in expection and can not running into the drill string/bit rotation velocity of overvibration and WOB.Drilling operation is by proceed under the drilling parameter of predetermined group that makes ROP optimize.

In step 904, drilling operation proceeds under this group operating parameter of being advised by software application.Drilling operation can proceed until change drilling conditions.Change can comprise the change, vibration increase etc. of bit wear, different stratigraphic types, angle of inclination, azimuth, the degree of depth.In step 906, software application will periodically access the drilling data from downhole sensor and surface sensor, as mentioned above.

In step 908, software application will determine that whether measuring vibrations information is consistent with prediction vibration information.If software application determines that measuring vibrations information is inconsistent or mate with prediction vibration information in step 908, then process control be transferred to step 910 and will revise drilling system model.If software application determines that measuring vibrations information is consistent with prediction vibration information in step 908, then process control is transferred to step 912.Thus, the drilling system model being utilized renewal performs by the optimization of drilling parameter, and the drilling system model of described renewal is predicted vibration based on the real time data from downhole sensor.

In step 912, software application is such as by determining whether whether drill stem operation exceed maximum value for this parts based on whether being high from the vibration in the drilling data determination drill string of downhole sensor close to the vibration at new critical speed or critical component place.If software application determines that described vibration is high, then process control is transferred to step 902, and step 902 is repeatedly performed to 910, and software application determines another group operating parameter, and another group operating parameter described will cause the highest expection ROP and can not run into overvibration.If software application determination vibration data is low in step 912, then process control is transferred to square frame 914.

Based on the data from ROP sensor 34, in step 914, software application determines whether ROP has departed from the desired value based on probing test.If departed from, software application just can advise performing further probing test to set up the new database with WOB and ROP that drill string/drill bit RPM is relative.

For the object that above-mentioned optimization method 901 is described, assuming that probing test produces following ROP data (for the sake of simplicity, assuming that do not have MTR, making drill bit RPM be identical with drill string RPM):

WOB, pound	200RPM	300RPM
			10k	10 feet per minute clocks (fpm)	20fpm
20k	15fpm	25fpm
			30k	20fpm	30fpm
40k	25fpm	33fpm

Table 1

Whether software application will be able to cause drilling system operate under critical speed or cause overvibration to be predicted at critical component place to operating drill string under 40k WOB and 300RPM (the highest ROP point in experimental data).If this process determines that operating drill string under 40k WOB and 300RPM (the highest ROP point in experimental data) does not cause critical speed or overvibration, then software application can cause computer system to the suggestion operated under user is presented at 40k WOB and 300RPM.After this, one group of drilling data (or adding the new pipeline section of drilling rod) that each acquisition is new, software application just will (i) when the prediction of the corresponding position of sensor is vibrated not consistent with measuring vibrations, drilling system model is revised, and (ii) determines whether vibration is excessive.Software application can utilize revised drilling system model to determine that whether this vibration is excessive in the vibration being determined critical component place by deduction measuring vibrations.

If this process determines that in some positions the vibration of drill string has become excessive, this process just carries out prediction to the vibration being in 30k WOB and 300RPM (the second high ROP point from probing experimental data) and suggestion operations person forwards those operating positions to, until it predicts overvibration under those situations.After this, get another group drilling data (and revising this model possibly), software application is just by being again back to and the highest ROP (40kWOB/300RPM) and whether the initial operation situation that do not run into overvibration is predicted safely at every turn.If software never predicts and is back to initial operation situation is safe, but in some positions, it determines that vibration has become excessive again, then the vibration under two groups of parameters that it causes third high ROP by being in---20kWOB/300RPM and 40k WOB/200RPM---is predicted and shown which causes lower prediction vibration.

In some embodiments, replace the change that only suggestion operations person makes operating parameter, the method automatic adjustment operation parameter automatically to operate under the situation causing maximum probing performance.

According to another embodiment of present disclosure, replace ROP to be used as to optimize basis, software can utilize mechanical ratio energy (" MSE ") but not the efficiency of ROP to probing is predicted.Can such as SPE/I ADC drill meeting SPE/IADC 92194 (2005) in F.Dupriest and W.Koederitz " can carry out mechanical ratio Real-Time Monitoring maximum drilling rate (Maximizing Drill Rates With Real-Time Surveillance of MechanicalSpecific Energy " and driller SCTE of U.S. AADE-05-NTCE-66 (2005) in W.Koederitz and J.Weis " the real-time execution (A Real-TimeImplementation Of MSE) of MSE " described in calculate MSE, each section in described document is all fully incorporated in herein in the mode of reference.For the object calculating MSE, software obtains the numerical value of ROP from one or more probing test, as mentioned above, and at the moment of torsion that each probing duration of test measures.Calculate based on these, this process can propose the suggestion of bit rotation velocity and WOB to revise the numerical value producing the highest MSE value to user/operator.

Although with reference to describing the present invention for the concrete grammar of monitoring the vibration in drill string, the present invention can be suitable for utilizing other method to carry out monitoring vibration based on instruction herein.Such as, although utilized MTR rotary drilling to describe the present invention, the rig that it is also applicable to pure rotary drilling, control loop (steerable system), rotation control loop (rotary steerablesystem), high-pressure spray probing and self-propelled drilling system and is driven by electro-motor and air motor.Therefore, the present invention can concrete manifestation and can not deviate from its spirit or base attribute in other specific forms, and therefore, when showing scope of the present invention, should with reference to claims but not aforementioned specification be described.

Claims

1. the method for predicting the vibration information of the drilling system for having drill string, described drill string comprises the drill bit being configured to form boring during drilling operation in pedostratigraphy, and described method is performed by computer and comprises the following steps:

Via computer processor access drilling system component information, described drilling system component information comprises one or more characteristics of described drill string;

Be used for the expection operation information of described drilling operation via the access of described computer processor, described expection operation information comprises the rotary speed of at least the pressure of the drill (WOB), described drill bit, bore diameter and vibration damping coefficient; And

Via described computer processor, the vibration information for described drill string is predicted, prediction vibration information comprises at least for the amplitude of each in the axial vibration of described drill string, oscillation crosswise and twisting vibration, and the prediction carried out described vibration information is carried out based on the energy balance of the described drill string according to the described expection operation information operation for described drilling operation and described drilling system component information.

2. method according to claim 1, wherein, the step predicted vibration information comprises the amplitude of each in the described oscillation crosswise determining described drill string, described axial vibration and described twisting vibration, wherein, the energy being supplied to drilling operation is equal with the energy dissipated due to the vibration of described drilling system parts during described drilling operation.

3. method according to claim 1, wherein, limit model to the step that vibration information is predicted, described model is the FEM (finite element) model of the frequency domain type described energy balance being applied to described drill string.

4. method according to claim 3, wherein, described prediction vibration information comprises the model shape at least one in axial vibration, oscillation crosswise and twisting vibration.

5. method according to claim 1, also comprises the step determining the critical speed of described drill string based on the described expection operation information of described drill string and described prediction vibration information.

6. method according to claim 6, wherein, determines that the step of the described critical speed of described drill string comprises and determines described critical speed based at least one in the pressure of the drill and rotary speed.

7. method according to claim 1, wherein, described one or more characteristic of described drill string comprises the position of the stabilizer on drill string geometry, the material behavior of described drill string, described drill string and quantity, the angle of inclination of described drill string and drill bit geometry.

8. method according to claim 1, also comprises the step receiving described drilling system component information via communication system.

9. method according to claim 1, also comprises via the step of communication system reception for the described expection operation information of described drilling operation.

10. a drilling system, described drilling system is configured in pedostratigraphy, form boring during drilling operation, and described drilling system comprises:

The drill string of supporting drill bit, described drill configurations becomes to limit described boring;

At least one calculation element, at least one calculation element described comprises storage area, described storage area stores drilling system component information, described drilling system component information comprises one or more characteristics of described drill string, described storage area also comprises the expection operation information for described drilling operation, and described expection operation information comprises the rotary speed of at least the pressure of the drill (WOB), described drill bit, bore diameter and vibration damping coefficient; And

The computer processor communicated with described storage area, described computer processor is configured to predict the vibration information for described drill string, prediction vibration information comprises at least for the amplitude of each in the axial vibration of described drill string, oscillation crosswise and twisting vibration, wherein, the prediction carried out described vibration information is carried out based on the energy balance of the described drill string according to the described expection operation information operation for described drilling operation and described drilling system component information.

11. drilling systems according to claim 10, wherein, the prediction that vibration information carries out is carried out based on for the amplitude of each in the described oscillation crosswise of described drill string, described axial vibration and described twisting vibration, wherein, the energy being supplied to described drilling operation with during described drilling operation due to as be applied to described drill string one or more power function described drilling system parts vibration and the energy dissipated is equal.

12. drilling systems according to claim 10, wherein, described prediction vibration information is by carrying out the FEM (finite element) model of function application in described drill string based on frequency domain type of described energy balance as the one or more power being applied to described drill string.

13. drilling systems according to claim 10, wherein, described prediction vibration is for along the model shape of at least one in the axial vibration of described drill string, oscillation crosswise and twisting vibration.

14. drilling systems according to claim 10, wherein, the described one or more characteristic in described drill string comprises the position of the stabilizer on drill string geometry, the material behavior of described drill string, described drill string and quantity, the angle of inclination of described drill string and drill bit geometry.