CN116335635A - Storage type logging time depth acquisition method and device suitable for multiple conveying tools - Google Patents

Abstract

The invention discloses a storage type logging time depth acquisition method and device suitable for various conveying tools, and relates to the field of logging control. The post-measurement data processing module comprises a movement interval judging module, a clock synchronizing module, a drilling tool management module B, a leakage depth finding module, a depth recalibration module, a secondary depth correcting module and a time depth deriving module. The method comprises a drilling tool conveying type real-time well depth acquisition method, a drilling tool conveying type well depth after-measurement acquisition method, well depth after-measurement acquisition without a depth acquisition scene and continuous oil pipe conveying type well depth after-measurement acquisition. The invention provides various depth correction methods, error data correction, depth leakage recovery and other functions, and can realize construction operation of various storage type logging scenes.

Description

Storage type logging time depth acquisition method and device suitable for multiple conveying tools

Technical Field

The invention relates to the field of logging control, in particular to a storage type logging time depth acquisition method and device suitable for various conveying tools.

Background

Storage logging is a logging technology which is emerging recently and mainly consists of three parts: the underground measuring unit is responsible for collecting and storing time-engineering measuring data at equal time intervals in the construction process; the ground depth measuring unit is used for measuring and storing time-depth data of the instrument entering the well in the construction process; the data processing unit after logging is responsible for combining the data of 'time-engineering measurement' stored underground and the data of 'time-depth' generated by the ground unit by taking time as an intermediate medium to form a 'depth-engineering measurement' curve, is a new process different from the traditional cable logging and drilling tool conveying cable logging, is matched with various conveying tools, is suitable for logging operations of high-inclination wells and ultra-long horizontal wells with severe well conditions, and is popular with oilfield users.

The current storage type well depth measuring technology of drilling tool conveying mode in the market is mostly improved based on a general drilling depth system, a photoelectric encoder is directly arranged on a central shaft of a winch drum of a drilling machine, the photoelectric encoder is driven to rotate through shaft rotation to generate pulse counts, and the obtained pulse counts are converted into hook up-down displacement by matching with a hook height calibration file, wherein the hook height calibration method is generally two: indirect and direct processes.

The indirect calibration method is to generate a pulse count-hook height calibration file based on a round calculation model by acquiring parameters such as winch parameters of a drilling machine and the diameter of a large rope (1), wherein the specific calibration parameters are shown in figure 1.

The photoelectric encoder is arranged on the central shaft of the winch drum, and the winch drumThe photoelectric encoder generates a pulse count every revolution of the drum (2), so that each increment of the pulse count represents a certain rope length. Because the large ropes are wound on the roller in a multi-layer overlapped manner, the diameter of the large rope circle wound on the roller is not constant, as shown in figure 1, the length L of the rope wound in the j-th layer large rope winding roller in a circle _j (length of ABC in FIG. 1) is calculated as formula (1).

Wherein: j is the layer number of the large rope, and is respectively 1,2,3 and … … from inside to outside

r is the rope radius.

R _j For the distance from each layer of the large rope to the axis of the roller, the distance is obtained from the following figure 1:

wherein R is the radius of the roller.

Such that each increment ΔL of the pulse count value of the photoelectric encoder _j Not representing the same rope length, the relationship being

Wherein: m is the total number of pulses generated by one revolution of the photoelectric encoder.

When j=1, the length of the rope wound into the drum is as shown in formula (4)

LΔL ₁ *n (4)

Where n is a pulse count value, the higher the hook height, the greater the value. The length of the big rope which is rolled into the roller after the big rope is fully paved on the first layer is shown as (5)

L ₁ ＝ΔL ₁ m(X-X ₀ ) (5)

Wherein X is the number of turns of each layer of large rope，X ₀ Is the number of turns of the large rope remaining on the drum when the hook height is equal to 0.

When j >1, the length of the large rope wound into the roller is as shown in (6)

L＝L _j-1 +ΔL _j [n-(j-2)mX-mX ₀ ] (6)

In which L _j-1 After the j-1 layer of large ropes are fully paved on the roller, the length of the large ropes wound into the roller is shown as (7)

The relationship between the hook height H and the rope length L wound into the drum is shown in formula (8).

Wherein a is the number of large ropes wound by the pulley block of the upper end of the big hook.

The above is an algorithmic description of an indirect calibration method.

The direct calibration method is to use a tape measure to measure the position of the initial point of the big rope wound on the winch drum and the critical point of the layer change of the big rope to respectively perform pulse counting collection and big hook height measurement in the process of measuring the big hook from the drilling floor surface to the highest point, and finally generate a pulse counting-big hook height calibration file.

Because of the influence of the load-bearing state change of the large rope and the roller wire arrangement, the measurement result has certain errors, such as the phenomenon of the height drift of the large hook, regardless of the direct calibration method or the indirect calibration method.

In the process of tripping, when the hook is connected with the drilling tool string to run, the hook is heavy-load, and the rope is in a fully-tightened state; when the big hook runs in a no-load mode, the big hook is lightly loaded, and the big rope is in a relatively loose state. When the next stroke is hooked up, the photoelectric encoder generates small deviation in the total pulse count in the opposite directions of the up and down strokes, and the deviation directions generated by each stroke are consistent. After the big hook is lifted up for a plurality of times, the phenomenon that the value of the big hook at a low point is not reset due to the accumulation of deviation is called big hook height drift. If the influence of the hook height drift phenomenon is not considered during the on-site depth measurement, the measured depth data error becomes larger and larger.

In order to reduce measurement errors and eliminate accumulated errors in the construction process, the common practice is to require a drilling crew to provide a drilling tool table, to require the drilling crew to drop down strictly according to the drilling tool table sequence, and to require the height of the drill string to be consistent every time the drill string is fastened. But in the work progress, on the one hand the unordered problem of transferring of well team drilling tool appears, on the other hand in the open hole well work progress, in order to guarantee safety use three formula slips instrument to sit card drilling tool string generally, the uniformity of card height is sat at every turn hardly guaranteed like this.

In order to extract the instrument well depth data from the hook displacement data, the load bearing state of the hook, whether the string of drilling tools is hung or not, needs to be monitored on site. The common practice is to install a big rope tension sensor or a pressure transmitter at the dead rope end of the big rope to collect the hanging weight value of the big hook, judge the bearing state of the big hook in a mode of setting a middle threshold, and convert the big hook displacement data when the big hook is connected with a drilling tool to be the instrument well entering depth data.

In the field construction process, when the logging instrument and the drilling tool string are blocked, the number of drilling tools near the wellhead is small, the hook hanging weight value is jumped to cause misjudgment of the hook bearing state, so that the problems of loss or dislocation of measured well depth data and the like are caused.

The on-site hardware faults (such as signal line breakage of a large well site truck, damage of a depth acquisition box and the like) cause the interruption of depth data acquisition, if a drilling tool is in the process of hanging the drilling tool to lift and log, the operation cannot be stopped in time, particularly for a measuring instrument comprising an open leg structure in a downhole instrument combination, once the instrument is opened for upper measurement, the instrument is not allowed to be lowered again, otherwise, the instrument is damaged, safety accidents are caused, and when the situation occurs, the depth data measurement of a current column is lost.

In addition, for the storage type well logging technology, the clocks of the underground measuring unit and the clocks of the ground depth measuring unit are mutually independent in the well logging process, the time setting operation is needed before the instrument enters the well, namely, the clocks of the underground measuring unit and the clocks of the ground depth measuring unit are synchronized, so that the synchronism of the data of the underground measuring unit and the clocks of the ground depth measuring unit after the measurement can be ensured, but because the working environments of the underground unit and the ground unit are different, particularly for a high-temperature well, an ultra-deep well and a well with longer working time, the phenomenon of clock asynchronism can be inevitably caused after the two independent units are operated for a longer time, and the deep matching inevitably has a problem after the measurement is directly carried out.

Besides the storage type well logging process by using the drilling tool conveying mode, the storage type well cementation quality well logging is popular in the present time, a well logging instrument is hung at the lower end of the continuous oil pipe through an adapter, two chains which rotate vertically and reversely are adopted to drive an injection head to control the lifting of the continuous oil pipe, the well logging instrument is conveyed to a deep well to perform well logging operation by means of the strength and toughness of the continuous oil pipe, a depth measuring device is generally arranged between a roller and a gooseneck, a direct contact mode of a measuring wheel and the continuous oil pipe is adopted, linear motion of the continuous oil pipe is converted into circular motion of the measuring wheel by means of friction force between the measuring wheel and the gooseneck, and further, pulse counting generated by rotation of the measuring wheel is recorded by a photoelectric encoder arranged at the center of the measuring wheel to realize depth measurement.

In the process of pushing a logging instrument, the coiled tubing is affected by self counter force and friction force, the coiled tubing is in an approximately sinusoidal buckling state in a shaft, so that depth data measured by the method is not the actual logging depth of the instrument, but the logging length of the coiled tubing, the phase difference between the depth data and the logging length of the coiled tubing is larger and larger along with the increase of the well depth, and the deep matching between the measured time-depth data and the downhole data is problematic.

In summary, when the drill rod is used for conveying, the depth measurement process is measured by taking a single-column drilling tool as a unit section; when the continuous oil pipe is used for conveying operation, the depth measurement can be continuous, but the local depth is still greatly error due to the influence of the factors, so that the depth data directly measured by the two modes can be used after the depth correction is needed, and the depth correction formula is shown as a formula (9).

h _co ＝P+[(L _re /L _ce )*(h-P)] (9)

For drill pipe conveyance: p is the actual depth of the current drilling tool starting to be lifted when the drill rod to be hung is detached from the slip, L _re For the actual length of the current drill (both parameters can be obtained directly from the drill string), L _ce The length is measured after the photoelectric encoder converts; h is the instrument depth converted by the photoelectric encoder at each moment;

For coiled tubing conveyed storage type well cementation quality logging, P is the real-time depth of the corresponding sleeve port when the measured magnetic positioning joint hoop peak is, L _re For the actual length of the current cementing casing (both parameters can be obtained directly from the cementing casing table), L _ce The depth is measured after the photoelectric encoder converts; h is the instrument depth converted by the photoelectric encoder at each moment;

the storage type logging construction site has complex working conditions and a plurality of factors influencing accurate depth measurement, and a deep data acquisition method and device applicable to storage type logging integration under various conveying tools and various complex working conditions are urgently needed.

In the description of the method and the device for processing the time-depth data of the well logging equipment in the Chinese patent literature (application number: CN 201410429511.5), a great deal of space is used for describing the judgment of the state of the hook slip, namely judging whether the bottom end of the hook is connected with a drilling tool in a hanging way: when the big hook is connected with the drilling tool, the big hook and the underground instrument synchronously move, and the measured depth data are effective data; when the large hook is in idle load, the drilling tool string is clamped at the wellhead, and at the moment, the large hook moves anyway, and the downhole instrument is stationary. If the slip-setting state is judged in error, the error of missing measurement of effective data or false recognition of invalid data can occur, so in the patent document, a quite complex large hook slip-setting judging method is described, even a video monitoring means is introduced, the invention can only acquire effective depth data in the measuring process, and the consideration of factors affecting the accuracy, the effectiveness and the data integrity of the depth measurement in the field operation process is not mentioned. For example, the problem of loss of depth data segments caused by faults of a data acquisition system in the process of operation is solved by the influence of error accumulation caused by the height drift of a large hook in the process of conveying a drill rod, the problem of asynchronous underground and ground system clocks after long-time high-temperature well operation is solved, the problem of larger depth measurement errors caused by calibration model defects is solved, and the problems of down-hole disorder of a drilling tool, conveying type depth acquisition of a continuous oil pipe machine and the like are solved.

The invention can solve the problems of judging the state of the slip, asynchronous clocks of the underground and ground systems and retrieving lost depth data by a visual method of drawing a curve after measurement and dragging a mouse; the method for calculating the repeated depth of the corrected calibration model after measurement can reduce the influences of the depth measurement errors and the accumulated errors generated by the height drift of the hook as much as possible, can also solve the problem of disorder of the descending of the drilling tool in a sequencing mode, and simultaneously, the system also provides a method for acquiring the time-depth data of other conveying tools such as a continuous oil pipe.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a storage type logging time deep acquisition method and device suitable for various conveying tools, which not only can easily and simply acquire logging instrument time deep data in the storage type logging construction process, but also can solve the problems of measurement dislocation, leakage, larger error and the like of the depth data caused by abnormal working conditions commonly occurring in a construction site.

The invention aims at being completed by the following technical scheme: the storage type logging time depth acquisition device for various conveying tools comprises a data acquisition module, a depth calibration module, an abnormality monitoring module, a drilling tool management module A, a real-time depth correction module, a data storage module and a post-measurement data processing module, wherein the data acquisition module acquires pulse counts of a photoelectric encoder and voltage values of a hook hanging weight sensor through a ground depth acquisition box; the depth calibration module is used for converting the depth calibration file into a hook height displacement and a hook hanging weight value; the abnormal monitoring module is used for alarming abnormal working conditions in the logging construction process in real time; the drilling tool management module A judges a drilling tool movement section by using a mode of setting a hook sling weight threshold value, and converts the hook height displacement in the drilling tool movement section into instrument well entering depth data; the real-time depth correction module corrects depth of the instrument well depth data in real time by matching with a drilling tool table, and eliminates accumulated errors; the data storage module is used for storing the original acquired data and the well depth data converted by the drilling tool management module A in real time, and the measured data processing module is used for performing secondary editing on the original acquired data and the converted well depth data in the data storage module when abnormal working conditions occur.

As a further technical scheme, the measured data processing module comprises a movement interval judging module, a clock synchronization module, a drilling tool management module B, a leakage depth finding module, a depth recalibration module, a secondary depth correcting module and a time depth deriving module, wherein the movement interval judging module is used for judging and correcting the movement interval of the drilling tool by matching with the drilling tool management module B so as to enable the well depth data of the instrument generated by conversion to be more complete; the clock synchronization module is used for synchronizing the movement interval of the ground drilling tool and the movement interval of the downhole instrument, so that the time depth data generated by conversion is real and reliable; the leakage depth retrieving module is used for generating segmented time depth data of the current drill string length according to the on-site tripping tool motion model by means of a drill tool table; the depth recalibration module is used for reconverting the time-depth data acquired originally according to the depth calibration file which is revised currently to generate the logging depth of the instrument, and the drilling tool table can be used for repeatedly operating for a plurality of times to enable the depth measurement error to be smaller and more accord with the measurement practice; the secondary depth correction module is used for correcting depth again of the converted data after depth recalibration, and is also used for correcting depth with inconsistent drilling tool descending mixing sequence and drilling tool setting height in the construction process; the time depth export module is used for generating a time depth data file for time depth matching of downhole data according to specific data format standards.

The acquisition method adopting the acquisition device comprises at least one of the following sub-methods:

sub-method A: drilling tool conveying type real-time well depth acquisition: firstly, converting the acquired pulse count and sling sensor data into hook height and sling value through a depth calibration table, and judging the hook bearing state through a sling threshold setting mode; when judging that the hook is in a state of hanging a drilling tool string, converting the current hook height value into deep data when the instrument enters a well, generating a motion information table from a measurement result of each drilling string in the tripping process, and finally guiding out by utilizing a drilling tool table deep correcting function;

sub-method B: drilling tool conveying type well depth after measurement is obtained: storing all the hook height and the sling weight data in the real-time measurement process, simulating the construction process by a modeling mode after measurement, rapidly generating deep data and a motion information table when a segmented instrument enters a well, manually correcting the content of the wrong motion information table, automatically filling a missing depth data segment, synchronizing the underground time and the ground time deep data clock, and leading out a time deep data file for drilling tool table depth correction after the deep data editing in the whole well segment is completed;

sub-method C: drilling tool conveying type well depth after measurement is obtained: recording and storing an original pulse count value and a suspended weight sensor data acquired in real time on site, recalculating time-depth data of a full measurement section according to a corrected depth calibration file in a data modeling mode after measurement, repeating the process of the depth recalculation method for a plurality of times until a depth measurement error reaches a set value, correcting the initial position of the time-depth data in each movement section by the depth recalculation method, automatically supplementing the lost depth data section, synchronizing a downhole time-depth data clock with the ground, and leading out a time-depth data file of drilling tool table depth correction after the completion of the editing of the time-depth data of the full well section;

Sub-method D: and (3) obtaining the well depth after measurement of the scene without depth acquisition: accurately judging all movement interval sections in the well logging process by using the suspended weight data and the underground data after well logging, automatically supplementing the missing depth data sections by combining a drilling tool table to generate relatively accurate time depth data, simultaneously generating a movement information table by using a measurement result of each drill string in the tripping process, and finally deriving by using the depth correcting function of the drilling tool table;

sub-method E: coiled tubing conveying type well depth after measurement is obtained: after measurement, firstly, carrying out multiple depth recalculation on pulse counts of a photoelectric encoder which are collected and stored in real time on site according to a measuring wheel correction model, then carrying out depth correction by combining underground CCL data and a well cementation casing table, judging each casing section by using the characteristic of the underground CCL section hoop peak value through a method of setting a threshold, and then carrying out one-to-one correspondence with the casing data in the casing table so as to realize the depth correction of the casing table;

for the sub-methods A, B and C, before logging, performing depth calibration according to a direct calibration method or an indirect calibration method, generating a corresponding relation table of pulse count values and large hook displacement, and simultaneously introducing the drill tool sequence table to be used as a depth calibration basis;

for the sub-method E, the length equivalent of each pulse count is generated using the measurement wheel circumference and the number of pulses for one revolution of the photoelectric encoder.

As a further technical scheme, the method for automatically filling the missing depth data segments comprises the following steps: in a single-column drilling tool movement interval, the winch drum rotates at a constant speed basically, a pulse count value generated by rotation of the photoelectric encoder is in a linear relation with time, and when a large rope is wound after being fully arranged on the drum, the large hook height generated by conversion of the pulse count value according to a depth calibration table is in a fold line relation with time, and the automatic compensation of a lost depth data section is realized by combining the model with a drilling tool table.

As a further technical scheme, the method for synchronizing the underground time-depth data clock with the ground comprises the following steps: and the underground data time is taken as a reference in a graphical mode, and the ground time depth data is translated, so that the underground data clock is synchronous with the ground time depth data clock.

As a further technical scheme, in the sub-methods B, C and D, when applied to well cementation quality logging operation, the downhole CCL data and the well cementation casing table are utilized to further perform depth correction processing on the time depth data file from which the drilling tool table is derived, so as to improve the accuracy of time depth measurement.

As a further technical solution, the depth recalculation method includes the following steps:

step one: collecting and storing pulse count and the sling voltage value in real time, and entering a step two;

Step two: drawing a pulse count, a sling voltage curve and a downhole data curve by taking time as an abscissa, and entering a step three;

step three: judging whether the underground instrument is synchronous with the ground clock, if so, entering a step five, and if not, entering a step four;

step four: taking the underground curve as a reference, realizing clock synchronization by using the translational pulse count and the sling voltage curve, and entering a step five;

step five: judging whether the pulse counting data segment is lost, if yes, entering a step six, and if no, entering a step seven;

step six: filling the pulse counting curve in a drawing mode, and entering a step seven;

step seven: jumping to an initial data bar, and entering a step eight;

step eight: judging whether the sling voltage value is larger than a preset threshold value, if so, entering a step nine, if not, checking whether the current data reach the end of the data, if so, entering a step ten, if not, jumping to the next data and restarting the step eight;

step nine: acquiring drilling tool movement section data, checking whether the current data reach the end of the data, if so, entering a step ten, and if not, jumping to the next piece of data and restarting the step eight;

Step ten: calculating pulse count in a motion interval according to the calibration file to generate depth data, and entering a step eleven;

step eleven: judging whether the difference value between the actual length of the drilling tool and the length of the drilling tool is smaller than a preset threshold value, if so, entering a step twelve, if not, correcting the calibration model, and returning to the step ten;

step twelve: and performing deep correction on the storage depth according to the drilling tool table.

The beneficial effects of the invention are as follows:

1. the problems of judging the state of the slip, asynchronous clocks of the underground and ground systems and retrieving lost depth data can be solved by a visual method of drawing a curve after measurement and dragging a mouse;

2. the method for calculating the repeated depth of the corrected calibration model after measurement can reduce the influences of the depth measurement error and the accumulated error generated by the height drift of the hook as much as possible, and can also solve the problem of disorder in the descending of the drilling tool by using a sequencing mode;

3. meanwhile, the system also provides a time depth data acquisition method of other conveying tools such as a continuous oil pipe, and the like, which can be suitable for time depth acquisition of logging equipment of various conveying tools and has strong universality.

Drawings

Fig. 1 is a schematic structural view of a winch drum according to the present invention.

FIG. 2 is a schematic diagram of a real-time well depth measurement system according to the present invention.

FIG. 3 is a schematic diagram of a time-depth data post-measurement processing module according to the present invention.

FIG. 4 is a comprehensive flow chart of time-depth data acquisition in the present invention.

Fig. 5a is a graph of pulse count versus time for a single motion segment in accordance with the present invention.

Fig. 5b is a graph of hook height versus time for a single range of motion in accordance with the present invention.

FIG. 6 is a schematic diagram of the process of synchronizing downhole and surface data clocks in accordance with the present invention.

FIG. 7 is a schematic diagram of a well cementation quality storage type logging casing depth correction process in the invention.

FIG. 8 is a schematic diagram of a process for recalculating measured depth data according to the present invention.

FIG. 9 is a schematic diagram of a casing table depth calibration process for coiled tubing conveyed storage type well cementation quality logging in accordance with the present invention.

FIG. 10 is a flow chart of the post-measurement deep data processing core algorithm according to the present invention.

Reference numerals illustrate: a large rope 1 and a roller 2.

Detailed Description

The invention will be described in detail below with reference to the attached drawings:

examples: as shown in figure 2, the storage type logging time depth acquisition device for various conveying tools comprises a data acquisition module, a depth calibration module, an abnormality monitoring module, a drilling tool management module A, a real-time depth correction module, a data storage module and a post-measurement data processing module. Referring to fig. 3, the post-measurement data processing module comprises a movement interval judging module, a clock synchronization module, a drilling tool management module B, a loss depth finding module, a depth recalibration module, a secondary depth correcting module and a time depth deriving module.

Further, the data acquisition module acquires pulse counts of the photoelectric encoder and voltage values of the hook hanging weight sensor through the ground depth acquisition box. The depth calibration module utilizes a depth calibration file generated before construction operation and converts the depth calibration file into a hook height displacement and a hook hanging weight value. The abnormal monitoring module can alarm abnormal working conditions in the logging construction process in real time, so that a field operator can find out abnormality in time. The drilling tool management module A judges a drilling tool movement section in a mode of setting a hook hanging weight threshold value, converts hook height displacement in the drilling tool movement section into instrument well depth data, and the instrument well depth data are matched with the drilling tool table to conduct real-time depth correction by the real-time depth correction module, so that accumulated errors are eliminated, the data storage module can store original acquisition data and well depth data converted by the drilling tool management module A in real time, and the measured data processing module can conduct secondary editing on the original acquisition data and the converted well depth data in the data storage module when abnormal working conditions occur.

Further, the measured data processing module can perform secondary editing on the depth data stored in the real-time depth measurement process. And the movement section judging module is matched with the drilling tool management module B to judge and correct the movement section of the drilling tool, so that the converted instrument well depth data are more complete. The clock synchronization module can synchronize the movement interval of the ground drilling tool and the movement interval of the downhole instrument, so that the time depth data generated by conversion is real and reliable. The lost depth retrieval module can generate segmented time depth data of the current drill string length according to the on-site tripping tool motion model by means of the drill string table. The depth recalibration module can convert the original acquired time-depth data into the depth of the instrument entering the well according to the current recalibrated depth calibration file, and the drilling tool can be operated repeatedly for a plurality of times, so that the depth measurement error is smaller, and the method is more suitable for measurement practice. The secondary depth correction module is used for correcting depth again for the converted data after depth recalibration, and the secondary depth correction module also has depth correction functions of inconsistent drilling tool descending mixing sequence and drilling tool setting height in the construction process. The time depth export module may generate a time depth data file for time depth matching of downhole data according to specific data format criteria.

The acquisition method adopting the acquisition device comprises at least one of the following sub-methods:

sub-method A: drilling tool conveying type real-time well depth acquisition: firstly, converting the acquired pulse count and sling sensor data into hook height and sling value through a depth calibration table, and judging the hook bearing state through a sling threshold setting mode; when judging that the hook is in a state of hanging a drilling tool string, converting the current hook height value into deep data when the instrument enters a well, generating a motion information table from a measurement result of each drilling string in the tripping process, and finally guiding out by utilizing a drilling tool table deep correcting function;

sub-method B: drilling tool conveying type well depth after measurement is obtained: storing all the hook height and the sling weight data in the real-time measurement process, simulating the construction process by a modeling mode after measurement, rapidly generating deep data and a motion information table when a segmented instrument enters a well, manually correcting the content of the wrong motion information table, automatically filling a missing depth data segment, synchronizing the underground time and the ground time deep data clock, and leading out a time deep data file for drilling tool table depth correction after the deep data editing in the whole well segment is completed;

sub-method C: drilling tool conveying type well depth after measurement is obtained: recording and storing an original pulse count value and a suspended weight sensor data acquired in real time on site, recalculating time-depth data of a full measurement section according to a corrected depth calibration file in a data modeling mode after measurement, repeating the process of the depth recalculation method for a plurality of times until a depth measurement error reaches a set value, correcting the initial position of the time-depth data in each movement section by the depth recalculation method, automatically supplementing the lost depth data section, synchronizing a downhole time-depth data clock with the ground, and leading out a time-depth data file of drilling tool table depth correction after the completion of the editing of the time-depth data of the full well section;

Sub-method D: and (3) obtaining the well depth after measurement of the scene without depth acquisition: accurately judging all movement interval sections in the well logging process by using the suspended weight data and the underground data after well logging, automatically supplementing the missing depth data sections by combining a drilling tool table to generate relatively accurate time depth data, simultaneously generating a movement information table by using a measurement result of each drill string in the tripping process, and finally deriving by using the depth correcting function of the drilling tool table;

sub-method E: coiled tubing conveying type well depth after measurement is obtained: after measurement, firstly, carrying out multiple depth recalculation on pulse counts of a photoelectric encoder which are collected and stored in real time on site according to a measuring wheel correction model, then carrying out depth correction by combining underground CCL data and a well cementation casing table, judging each casing section by using the characteristic of the underground CCL section hoop peak value through a method of setting a threshold, and then carrying out one-to-one correspondence with the casing data in the casing table so as to realize the depth correction of the casing table;

for the sub-methods A, B and C, before logging, performing depth calibration according to a direct calibration method or an indirect calibration method, generating a corresponding relation table of pulse count values and large hook displacement, and simultaneously introducing the drill tool sequence table to be used as a depth calibration basis;

for the sub-method E, the length equivalent of each pulse count is generated using the measurement wheel circumference and the number of pulses for one revolution of the photoelectric encoder.

The method for automatically filling the missing depth data segments comprises the following steps: in the single-column drilling tool movement interval, the winch drum 2 rotates at a constant speed basically, the pulse count value generated by the rotation of the photoelectric encoder is in a linear relation with time, and the pulse count value is in a fold line relation with time according to the hook height generated by converting the pulse count value according to the depth calibration table in consideration of the fact that the large rope is wound in a layer-changing mode after being fully arranged on the drum, and the automatic compensation of the lost depth data section is realized by combining the drilling tool table according to the model.

The method for synchronizing the underground time-depth data clock with the ground comprises the following steps: and the underground data time is taken as a reference in a graphical mode, and the ground time depth data is translated, so that the underground data clock is synchronous with the ground time depth data clock.

In the sub-methods B, C and D, when the method is applied to well cementation quality logging operation, the downhole CCL data and the well cementation casing table are utilized to further conduct depth correction processing on a time depth data file for guiding out the depth correction of the drilling tool table so as to improve the accuracy of time depth measurement.

Referring to fig. 10, the depth recalculation method includes the steps of:

step one: collecting and storing pulse count and the sling voltage value in real time, and entering a step two;

step two: drawing a pulse count, a sling voltage curve and a downhole data curve by taking time as an abscissa, and entering a step three;

Step three: judging whether the underground instrument is synchronous with the ground clock, if so, entering a step five, and if not, entering a step four;

step four: taking the underground curve as a reference, realizing clock synchronization by using the translational pulse count and the sling voltage curve, and entering a step five;

step five: judging whether the pulse counting data segment is lost, if yes, entering a step six, and if no, entering a step seven;

step six: filling the pulse counting curve in a drawing mode, and entering a step seven;

step seven: jumping to an initial data bar, and entering a step eight;

step eight: judging whether the sling voltage value is larger than a preset threshold value, if so, entering a step nine, if not, checking whether the current data reach the end of the data, if so, entering a step ten, if not, jumping to the next data and restarting the step eight;

step nine: acquiring drilling tool movement section data, checking whether the current data reach the end of the data, if so, entering a step ten, and if not, jumping to the next piece of data and restarting the step eight;

step ten: calculating pulse count in a motion interval according to the calibration file to generate depth data, and entering a step eleven;

Step eleven: judging whether the difference value between the actual length of the drilling tool and the length of the drilling tool is smaller than a preset threshold value, if so, entering a step twelve, if not, correcting the calibration model, and returning to the step ten;

step twelve: and performing deep correction on the storage depth according to the drilling tool table.

Referring to fig. 4, description is made:

1) Depth calibration and early preparation

For the drilling tool conveying mode, before logging, the depth calibration is firstly carried out according to the direct calibration method or the indirect calibration method, a corresponding relation table of pulse count values and large hook displacement is generated, and meanwhile, the drilling tool descending sequence table is imported as a depth calibration basis.

For the continuous oil pipe conveying mode, the length equivalent of each pulse count is generated by directly utilizing the circumference of the measuring wheel and the pulse number of one circle of rotation of the photoelectric encoder.

2) Drilling tool conveying type real-time well depth obtaining method

Referring to the flow 1 in fig. 4, firstly, the collected pulse count and the data of the sling sensor are converted into the hook height and sling value through a depth calibration table, and the hook bearing state is judged by setting the sling threshold. When judging that the hook is in a state of hanging the drilling tool string, converting the current hook height value into deep data when the instrument enters the well, generating a motion information table according to the measurement result of the tripping process of each drilling string, and finally guiding out by utilizing the depth correcting function of the drilling tool table, wherein the depth correcting method refers to the formula (9). The method requires real-time measurement process without blockage and blockage working condition, depth data record without leakage, human participation in hook height correction is needed, the working strength of operators is high, and the method cannot process if the underground clock is out of synchronization with the ground clock after measurement.

3) Drilling tool conveying type well depth obtaining method after logging

The method of flow 2 in fig. 4 is an improvement of the method of flow 1, which is to store the hook height and the hanging weight data in the real-time measurement process, simulate the construction process in a modeling mode after measurement, quickly generate the deep data and the motion information table when the sectioning instrument enters the well, manually correct the content of the wrong motion information table, automatically supplement the lost depth data segment, and the method for supplementing the lost depth segment refers to fig. 5a and 5b: in the single-column drilling tool movement interval, the winch drum 2 rotates at a constant speed basically, the pulse count value generated by the rotation of the photoelectric encoder is in a linear relation with time, and the pulse count value is in a fold line relation with time according to the hook height generated by converting the pulse count value according to the depth calibration table in consideration of the fact that the large rope is wound in a layer-changing mode after being fully arranged on the drum, and the automatic compensation of the lost depth data section is realized by combining the drilling tool table according to the model.

For the problem of asynchronous downhole and ground clocks, a graphical mode is adopted to translate the ground time depth data by taking downhole data time as a reference, so that the downhole and ground time depth data clocks are synchronized, as shown in fig. 6.

And after the full-well section time depth data editing is completed, a time depth data file of the drilling tool table depth correction is derived, and the time depth data file corresponds to the method of the flow 2 in fig. 4. The method reduces the pressure of on-site operators to a certain extent, and has a corresponding correction method for abnormal working conditions such as depth data leakage, underground and ground clocks and the like which occur on site in post-measurement treatment, but the measurement accuracy is completely dependent on depth calibration model conversion in the well logging process, and because the working conditions such as hook height drift, resistance and card are existed in the construction process, if the operators do not timely correct the depth data in the construction process, the measured depth error is larger and larger.

The flow 3 method is an extension of the flow 2 method, is mainly applied to well cementation quality logging operation, and can utilize underground CCL data and well cementation casing table to perform further depth correction on time depth data of the flow 2 method, so that the accuracy of time depth measurement is improved. The depth correction method of the well cementation casing is shown in figure 7.

4) Drilling tool conveying type well depth obtaining method II after logging

Although the process 2 method reduces the working pressure of the field operators to a certain extent, the measurement accuracy is affected by the field construction process, and the problem of relatively large measurement errors exists in many cases. In order to solve the problem of low depth measurement accuracy, a method of a flow 4 is introduced, wherein the method is to record and store an original pulse count value and a suspended weight sensor data acquired in real time on site, and recalculate the time depth data of a full measurement section according to a corrected depth calibration file in a data modeling mode after measurement, and the specific method is shown in figure 8. The calculation process can be repeated for a plurality of times until the depth measurement error reaches the minimum, and the depth recalculation method corrects the time depth data initial position in each movement interval, so that the accumulated error influence caused by the hook height drift is eliminated, the subsequent operation is the same as the method in the process 2, and the application scene of the method in the process 5 is the same as the method in the process 3.

The invention solves the problem of asynchronous underground and ground clocks by drawing a visual translation curve of a data curve,

5) Post-measurement well depth acquisition method for depth-free acquisition scene

The method of the flow 6 aims at some special application scenes, such as using a well dredger or a workover rig as a conveying tool, when a photoelectric encoder cannot be installed on the central shaft of a winch drum, the drilling tool is required to start and stop to move at a nearly constant speed in each drill string movement section in the field operation process, and the hook sling weight data of the conveying tool in the whole operation process are recorded and stored. And accurately judging all movement intervals in the well logging process by using the suspended weight data and the underground data after the well logging, automatically generating relatively accurate time-depth data according to the depth leakage alignment method of the attached figures 5a and 5b by combining a drilling tool table, wherein the subsequent operation is the same as that of the process 2, and the application scene of the process 7 is the same as that of the process 3.

6) Coiled tubing conveying type well depth obtaining method after logging

The methods of the flow 8, the flow 9 and the flow 10 are applied to continuous conveying tools such as coiled tubing, cables and the like for storage type well cementation quality logging scenes. The flow 8 is to directly export the data of the logging depth (actually the length of the logging oil pipe) of the instrument converted by the on-site real-time measurement as the time depth data matched underground after the measurement, and the error is usually larger and the device can only be used for fast browsing of data; the method of the flow 9 is to calibrate the depth data of the instrument converted by on-site real-time measurement by combining the underground CCL data and the well cementation casing table after the measurement, the specific process is shown in the figure 9, and the method is to judge each casing section by using the characteristic of the underground CCL section hoop peak value through a method of setting a threshold, then to correspond to the casing data in the casing table one by one, so as to realize the function of calibrating the depth of the casing table. Generating a relatively accurate time depth data file after depth correction, wherein the depth measurement accuracy depends on a measuring wheel calibration model on site; the method of flow 10 is that after measurement, firstly, the photoelectric encoder pulse count collected and stored in real time on site is calculated for multiple times according to the correction model of the measuring wheel, and then the depth correction operation is carried out according to the method of flow 9, so that the problem of larger error in the real-time measuring process of flow 9 is solved.

In summary, in the time-depth data acquisition integrated flowchart, the process 4 is a core data processing process of the present invention, and the data processing processes of other processes are derived from the field operation environment based on the core data processing process, and the data processing process of the process 4 is shown in fig. 10.

According to the invention, the problems of judging the state of the slip, asynchronous clocks of the underground and ground systems and retrieving lost depth data can be solved by a visual method of drawing a curve after measurement and dragging a mouse; the method for calculating the repeated depth of the corrected calibration model after measurement can reduce the influences of the depth measurement errors and the accumulated errors generated by the height drift of the hook as much as possible, can also solve the problem of disorder of the descending of the drilling tool in a sequencing mode, and simultaneously, the system also provides a method for acquiring the time-depth data of other conveying tools such as a continuous oil pipe.

The invention provides a storage type logging time depth acquisition method and device suitable for various conveying tools, which have the functions of various depth correction methods, error data correction, depth leakage recovery and the like, and can realize construction operation of various storage type logging scenes.

It should be understood that equivalents and modifications to the technical scheme and the inventive concept of the present invention should fall within the scope of the claims appended hereto.

Claims (7)

1. Storage type logging time depth acquisition device suitable for multiple conveying tools, its characterized in that: the device comprises a data acquisition module, a depth calibration module, an abnormality monitoring module, a drilling tool management module A, a real-time depth correction module, a data storage module and a post-measurement data processing module, wherein the data acquisition module acquires pulse counts of a photoelectric encoder and a voltage value of a hook suspended weight sensor through a ground depth acquisition box; the depth calibration module is used for converting the depth calibration file into a hook height displacement and a hook hanging weight value; the abnormal monitoring module is used for alarming abnormal working conditions in the logging construction process in real time; the drilling tool management module A judges a drilling tool movement section by using a mode of setting a hook sling weight threshold value, and converts the hook height displacement in the drilling tool movement section into instrument well entering depth data; the real-time depth correction module corrects depth of the instrument well depth data in real time by matching with a drilling tool table, and eliminates accumulated errors; the data storage module is used for storing the original acquired data and the well depth data converted by the drilling tool management module A in real time, and the measured data processing module is used for performing secondary editing on the original acquired data and the converted well depth data in the data storage module when abnormal working conditions occur.

2. The storage logging time depth acquisition device suitable for multiple conveyance tools according to claim 1, wherein: the measured data processing module comprises a movement interval judging module, a clock synchronizing module, a drilling tool management module B, a leakage depth finding module, a depth recalibration module, a secondary depth correcting module and a time depth deriving module, wherein the movement interval judging module is used for judging and correcting the movement interval of the drilling tool by matching with the drilling tool management module B so that the well depth data of the instrument generated by conversion is more complete; the clock synchronization module is used for synchronizing the movement interval of the ground drilling tool and the movement interval of the downhole instrument, so that the time depth data generated by conversion is real and reliable; the leakage depth retrieving module is used for generating segmented time depth data of the current drill string length according to the on-site tripping tool motion model by means of a drill tool table; the depth recalibration module is used for reconverting the time-depth data which are originally acquired according to the depth calibration file which is revised currently to generate the depth of the instrument entering the well; the secondary depth correction module is used for correcting depth again of the converted data after depth recalibration, and is also used for correcting depth with inconsistent drilling tool descending mixing sequence and drilling tool setting height in the construction process; the time depth export module is used for generating a time depth data file for time depth matching of downhole data according to specific data format standards.

3. A storage type logging time depth acquisition method suitable for various conveying tools is characterized in that: comprising at least one of the following sub-processes:

sub-method A: drilling tool conveying type real-time well depth acquisition: firstly, converting the acquired pulse count and sling sensor data into hook height and sling value through a depth calibration table, and judging the hook bearing state through a sling threshold setting mode; when judging that the hook is in a state of hanging a drilling tool string, converting the current hook height value into deep data when the instrument enters a well, generating a motion information table from a measurement result of each drilling string in the tripping process, and finally guiding out by utilizing a drilling tool table deep correcting function;

sub-method B: drilling tool conveying type well depth after measurement is obtained: storing all the hook height and the sling weight data in the real-time measurement process, simulating the construction process by a modeling mode after measurement, rapidly generating deep data and a motion information table when a segmented instrument enters a well, manually correcting the content of the wrong motion information table, automatically filling a missing depth data segment, synchronizing the underground time and the ground time deep data clock, and leading out a time deep data file for drilling tool table depth correction after the deep data editing in the whole well segment is completed;

Sub-method C: drilling tool conveying type well depth after measurement is obtained: recording and storing an original pulse count value and a suspended weight sensor data acquired in real time on site, recalculating time-depth data of a full measurement section according to a corrected depth calibration file in a data modeling mode after measurement, repeating the process of the depth recalculation method for a plurality of times until a depth measurement error reaches a set value, correcting the initial position of the time-depth data in each movement section by the depth recalculation method, automatically supplementing the lost depth data section, synchronizing a downhole time-depth data clock with the ground, and leading out a time-depth data file of drilling tool table depth correction after the completion of the editing of the time-depth data of the full well section;

sub-method D: and (3) obtaining the well depth after measurement of the scene without depth acquisition: accurately judging all movement interval sections in the well logging process by using the suspended weight data and the underground data after well logging, automatically supplementing the missing depth data sections by combining a drilling tool table to generate relatively accurate time depth data, simultaneously generating a movement information table by using a measurement result of each drill string in the tripping process, and finally deriving by using the depth correcting function of the drilling tool table;

sub-method E: coiled tubing conveying type well depth after measurement is obtained: after measurement, firstly, carrying out multiple depth recalculation on pulse counts of a photoelectric encoder which are collected and stored in real time on site according to a measuring wheel correction model, then carrying out depth correction by combining underground CCL data and a well cementation casing table, judging each casing section by using the characteristic of the underground CCL section hoop peak value through a method of setting a threshold, and then carrying out one-to-one correspondence with the casing data in the casing table so as to realize the depth correction of the casing table;

For the sub-methods A, B and C, before logging, performing depth calibration according to a direct calibration method or an indirect calibration method, generating a corresponding relation table of pulse count values and large hook displacement, and simultaneously introducing the drill tool sequence table to be used as a depth calibration basis;

for the sub-method E, the length equivalent of each pulse count is generated using the measurement wheel circumference and the number of pulses for one revolution of the photoelectric encoder.

4. A storage logging time depth acquisition method suitable for multiple conveyance tools according to claim 3, wherein: the method for automatically supplementing the missing depth data segments comprises the following steps: in a single-column drilling tool movement interval, the winch drum (2) rotates at a constant speed basically, pulse count values generated by rotation of the photoelectric encoder are in a linear relation with time, and when the large ropes are wound in a layer-changing mode after being fully arranged on the drum, the pulse count values are converted according to a depth calibration table to generate a broken line relation between the height of the large hook and the time, and according to the model, the automatic filling of the lost depth data section is realized by combining the drilling tool table.

5. The method for storage logging time depth acquisition for multiple conveyance according to claim 4, wherein: the method for synchronizing the underground time-depth data clock with the ground time comprises the following steps: and the underground data time is taken as a reference in a graphical mode, and the ground time depth data is translated, so that the underground data clock is synchronous with the ground time depth data clock.

6. The method for storage logging time depth acquisition for multiple conveyance according to claim 5, wherein: in the sub-methods B, C and D, when the method is applied to well cementation quality logging operation, the downhole CCL data and the well cementation casing table are utilized to further conduct depth correction processing on a time depth data file for guiding out the depth correction of the drilling tool table so as to improve the accuracy of time depth measurement.

7. The method for storage logging depth acquisition for a plurality of conveyances according to any one of claims 3 to 6, wherein: the depth recalculation method comprises the following steps:

step one: collecting and storing pulse count and the sling voltage value in real time, and entering a step two;

step two: drawing a pulse count, a sling voltage curve and a downhole data curve by taking time as an abscissa, and entering a step three;

step three: judging whether the underground instrument is synchronous with the ground clock, if so, entering a step five, and if not, entering a step four;

step four: taking the underground curve as a reference, realizing clock synchronization by using the translational pulse count and the sling voltage curve, and entering a step five;

step five: judging whether the pulse counting data segment is lost, if yes, entering a step six, and if no, entering a step seven;

Step six: filling the pulse counting curve in a drawing mode, and entering a step seven;

step seven: jumping to an initial data bar, and entering a step eight;

step eight: judging whether the sling voltage value is larger than a preset threshold value, if so, entering a step nine, if not, checking whether the current data reach the end of the data, if so, entering a step ten, if not, jumping to the next data and restarting the step eight;

step nine: acquiring drilling tool movement section data, checking whether the current data reach the end of the data, if so, entering a step ten, and if not, jumping to the next piece of data and restarting the step eight;

step ten: calculating pulse count in a motion interval according to the calibration file to generate depth data, and entering a step eleven;

step eleven: judging whether the difference value between the actual length of the drilling tool and the length of the drilling tool is smaller than a preset threshold value, if so, entering a step twelve, if not, correcting the calibration model, and returning to the step ten;

step twelve: and performing deep correction on the storage depth according to the drilling tool table.

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