CN101338668A - Method and system for determining drilling fluids leakage and overflow - Google Patents
Method and system for determining drilling fluids leakage and overflow Download PDFInfo
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Abstract
The present invention relates to a method for measuring drill fluid spillage and a system adopting the method. The method calculates the difference value of the actual total pool cubage and the theoretic cubage to judge the real time state for boring a well. The method and the system have high automatization degree and high precision and can immediately confirm the spilling position and control effectively when drill fluid spillage occurs.
Description
[technical field]
The present invention relates to measure the method for liquid spill and leakage position in drilling well or boring, the particularly definite drilling well, and the system of this method of use.
[background technology]
Leakage (or claiming bore leaking) is the common accident in oil, the gas drilling engineering, is the trap that drilling fluid bleeds the stratum in the drilling process.Leakage takes place in the drilling engineering not only can have a strong impact on construction safety, construction speed and cost, also can the severe contamination oil-gas Layer, influence oil gas product.After the key of leak stopping work is that leakage takes place, determine the position of lost-circulation zone as early as possible accurately,, normally carry out to guarantee drilling well so that in time take effective leaking-stopping measure.The method of mensuration lost-circulation zone position commonly used has hydrodynamics method and instrument measuring method at present.
Wherein, the hydrodynamics method is to measure mud to go out well yield and corresponding leakage degree in the direct flushing process, implement anti-circulation well cleanup simultaneously, in anti-cyclic process, change the mud flow rate that injects into well, leakage severity in reaching the direct flushing process, measure and the corresponding situation mud flow rate of leakage severity reduced value, calculate the distance of well head to drop ply according to formula.
Instrument measuring method comprises well temperature method of testing etc.Mud is subjected to the influence of formation temperature to form certain mud column temperature gradient in well.If run into lost-circulation zone, the mud that has uniform temperature in the well of the lost-circulation zone top lost-circulation zone that bleeds, and the bottom can keep the heat slurry.Cold slurry is squeezed in the well when ground, carries out temperature survey immediately, and the low temperature gradients curve of its mud fluid column will occur unusual in leakage place.But need trip out drill string at test period.The minute of incuring loss through delay drop ply position because of temporal delay brings unexpected problem to the stratum, not only influences wellbore stability and also can bring bigger harm to the stratum because of failing timely leak stopping, brings massive losses to engineering.
Monitor main frame and PRN device that the measureing equipment that uses in the prior art generally includes the sensor that is installed in the job site and annex thereof, links to each other and be used for sensor, wherein, in the monitor main frame remote supervision system is installed, is used for realizing that control sensor, data computation are judged and data output.
For example, application for a patent for invention CN03824747.X discloses a kind of logging system and equipment that is configured among the wellhole environment, this equipment comprises the fiber optic sensor that at least one portion is used for gage well orifice ring border, the data of being measured by sensor are being transmitted to ground via fiber optic line on the basis in real time, and data are processed into real-time demonstration at the place, ground.Yet, do not have the method for openly determining drop ply in this application.
[summary of the invention]
" technical problem that will solve "
The objective of the invention is to overcome the deficiencies in the prior art, a kind of system that measures the method for drilling well drop ply and use this method is provided.
" technical scheme "
In order to achieve the above object, the invention provides a kind of method of measuring the drilling fluid spill and leakage, its principle is by obtaining the actual value of total pond volume, compares with the theoretical value of total pond volume, judges the spill and leakage position by comparative result, controls then.
According to above-mentioned principle, the assay method that the present invention proposes may further comprise the steps:
The actual volume summation of the mud in A, the measurement well site in all slurry tanks obtains total pond volume.
Total pond volume has multiple measurement computational methods, wherein a kind ofly be, at first measure the cross-sectional area of the mud liquid level in each slurry tank and each slurry tank in the well site, calculate mud volume in each slurry tank, the mud volume addition with each slurry tank obtains total pond volume then.
The theoretical volume of the mud in B, the calculating well site in all slurry tanks:
Theoretical volume
k=theoretical volume
K-1-Δ T
Wherein, theoretical volume is a cycling numerical value, and the numerical value of measuring by the last time deducts variable quantity and can obtain current numerical value, in above-mentioned formula, and theoretical volume
kNumerical value under the expression current state, theoretical volume
K-1Expression is last calculates the numerical value that obtains, and the initial value theoretical volume
0Can give gained by total pond volume in a certain moment; Δ T represents mud volume change in the well, and described variable quantity is along with the drilling tool increase and decrease, is changed mud volumetric change in the well that is caused by well depth, here, and the variable quantity of drilling tool volume in the variable quantity-well of Δ T=pit shaft volume;
Wherein, the computational methods of pit shaft volume are:
1. when well depth during less than bore hole 1 degree of depth, pit shaft volume=bore hole 1 cross-sectional area * well depth
2. when well depth less than bore hole 2 degree of depth during greater than bore hole 1 degree of depth, pit shaft volume=bore hole 1 cross-sectional area * bore hole 1 degree of depth+bore hole 2 cross-sectional areas * (well depth-bore hole 1 degree of depth)
3. when well depth less than bore hole 3 degree of depth during greater than bore hole 2 degree of depth, pit shaft volume=bore hole 1 cross-sectional area * bore hole 1 degree of depth+bore hole 2 cross-sectional areas * bore hole 2 degree of depth+bore hole 3 cross-sectional areas * (well depth-bore hole 2 degree of depth)
Wherein, interior drilling tool length * (the drilling tool outer area-drilling tool hollow area) of drilling tool volume=well in the well
Wherein, bore hole is meant the not well section of setting of casing part.
C, calculation procedure A income value and step B income value poor;
D, by the data that step C obtains, judge whether the drilling fluid spill and leakage takes place in the drilling well, and definite spill and leakage position, determination methods is:
If step C gained result be on the occasion of, then being illustrated in not have artificially to replenish under the situation of excess mud to slurry tank, the actual value of total pond volume is greater than theoretical value, step C gained data are spill-out, illustrates excessive layer of this degree of depth shaft bottom appearance; That is to say that this difference is the underfill amount if the interior underfill mud of well then can lack than actual volume at underfill stage theory of computation volume, promptly the mud spill and leakage shows that overflow value is the mud volume of underfill;
If step C gained result is a negative value, then being illustrated in does not have artificially to extract under the situation of mud from slurry tank, and the actual value of total pond volume is less than theoretical value, and step C gained data are leakage, illustrate in this degree of depth shaft bottom drop ply to occur; That is to say if mud pit has replenished new mud, then when replenishing the mud end, give " theoretical volume ", use as calculating next time with the total pond of mud bulking value at this moment.
The result of E, output step D.
In order to realize said method, the present invention also provides a kind of system that is used to measure the drilling fluid spill and leakage, described system comprises the equipment that is installed in the well site and can be placed on away from the well site and locates, the equipment that is connected with other assembly by data transmission set, promptly, this system comprises the liquid level sensor of the mud liquid level that is used for measuring the well site slurry tank, be used for measuring the weight transduser of drilling process suspending weight and the pressure of the drill value, be used to measure the drawworks sensor of well depth and hook height, monitor main frame and output equipment, described sensor and described monitor main frame, connect by cable between the output equipment, wherein, described monitor main frame comprises:
(1) is used to store the storage device of the data that record by described sensor, the mud liquid level data that described data include but not limited to be recorded by liquid level sensor, the suspending weight that records by weight transduser and the pressure of the drill Value Data, the well depth and the hook height data that record by drawworks sensor;
(2) the actual mud volume summation that is used to calculate all slurry tanks is the calculation element of total pond volume;
(3) the theoretical mud volume summation that is used to calculate all slurry tanks is the calculation element of theoretical volume, and the computational methods of this calculation element are: theoretical volume
k=theoretical volume
K-1-Δ T
Wherein, theoretical volume is a cycling numerical value, and the numerical value of measuring by the last time deducts variable quantity and can obtain current numerical value, in above-mentioned formula, and theoretical volume
kNumerical value under the expression current state, theoretical volume
K-1Expression is last calculates the numerical value that obtains, and the initial value theoretical volume
0Can give gained by the volume of always holding in a certain moment; Δ T represents mud volume change in the well, and described variable quantity is along with drilling tool moves, and is changed mud volumetric change in the well that is caused by well depth, here, and the variable quantity of drilling tool volume in the variable quantity-well of Δ T=pit shaft volume;
Wherein, the computational methods of pit shaft volume are:
1. when well depth during less than bore hole 1 degree of depth, pit shaft volume=bore hole 1 cross-sectional area * well depth
2. when well depth less than bore hole 2 degree of depth during greater than bore hole 1 degree of depth, pit shaft volume=bore hole 1 cross-sectional area * bore hole 1 degree of depth+bore hole 2 cross-sectional areas * (well depth-bore hole 1 degree of depth)
3. when well depth less than bore hole 3 degree of depth during greater than bore hole 2 degree of depth, pit shaft volume=bore hole 1 cross-sectional area * bore hole 1 degree of depth+bore hole 2 cross-sectional areas * bore hole 2 degree of depth+bore hole 3 cross-sectional areas * (well depth-bore hole 2 degree of depth)
Wherein, interior drilling tool length * (the drilling tool outer area-drilling tool hollow area) of drilling tool volume=well in the well
(4) be used for the calculation element of the difference of more total pond volume and theoretical volume;
(5) be used for device according to the difference output judged result of total pond volume and theoretical volume; Judge the device that whether the drilling fluid spill and leakage takes place in the drilling well and determine the spill and leakage position, its determination methods is:
If the difference of total pond volume and theoretical volume be on the occasion of, then being illustrated in not have artificially to replenish under the situation of excess mud to slurry tank, the actual value of total pond volume is greater than theoretical value, step C gained data are spill-out, illustrates excessive layer of this degree of depth shaft bottom appearance; That is to say that this difference is the underfill amount if the interior underfill mud of well then can lack than actual volume at underfill stage theory of computation volume, promptly the mud spill and leakage shows that overflow value is the mud volume of underfill;
If the difference of total pond volume and theoretical volume is a negative value, then being illustrated in does not have artificially to extract under the situation of mud from slurry tank, and the actual value of total pond volume is less than theoretical value, and step C gained data are leakage, illustrate in this degree of depth shaft bottom drop ply to occur; That is to say if mud pit has replenished new mud, then when replenishing the mud end, give " theoretical volume " the total pond of mud bulking value at this moment.
(6) be used for taking prevention and control or/and remedial measure according to judged result output alarm signal prompting field operation personnel, and export the slush pump that the control signal start and stop are controlled slurry tank, make slush pump pump into mud, to stop the mud of annotating toward well head automatically.Usually, operation field can manually be allocated mud if the slight situation of overflowing occurs, and the proportion that strengthens mud makes the shaft bottom return the slurry effect of being stressed can't to overflow.If the blowout situation occurs, will open " preventer " of well head, preventer will cut off drilling rod automatically, and well head is shut, and discarded this well is to guarantee personnel's life security.If the situation of leakage occurs, can manually in mud pit, add sticky sealing agents such as cement, by mud circulation sealing agent is infiltrated drop ply drop ply is shut.
According to a kind of preferred specific embodiment of said system, wherein said liquid level sensor can be mounted in ultrasonic liquid level sensor or the float liquid level sensor in each slurry tank.
Described drawworks sensor is installed in winch drum one side of winch in the well site, for example is connected by the drum shaft of thread connecting mode with winch drum one side.During the winch drum rotation, the pulse signal that the Hall switch of this sensor internal can collect to the monitoring host computer transmission in real time, main frame stores, writes down and change into corresponding depth data (being well depth) or altitude information (being hook height) to this pulse signal.
Described weight transduser is installed in the hydraulic generator place of the dead line anchor in well site, is used for measuring suspending weight and the pressure of the drill value of drilling process.Can judge several states of operation by suspending weight data and situation of change thereof,, thereby calculate the single number (in the drilling well field, drilling tool of every increase promptly increases a single number) of drilling tool as seat card, unfreezing etc.The effect of single number is that operation field promptly can calculate well depth automatically by winch and weight transduser, but may have certain error in Practical Calculation.What can be revised the well depth that calculates automatically by the single numbers of number (each drilling rod has certain length, think to put into well root drilling rods by calculating calculate actual well depth what are).By extracting the error that single number of institute's number and corresponding well depth data calibration actual measurement thereof produce, like this can be so that final error is exactly the error of last single generation.Dead line anchor is the mechanism that the dead line pulling force of rig is converted to fluid pressure, and it is made up of rope sheave, base, hydraulic generator three parts.Curl up wire rope on the rope sheave of dead line anchor, the end of wire rope is fixed, and wire rope detours via rope sheave on the cylinder of winch again.Usually, according to the difference of rig model, the installation site of dead line anchor is also inequality, and it mainly acts on is exactly fixing wire rope.In being full of the well of drilling fluid, the axial load of drill string weight indicator indication under suspended state is called drilling tool apparent weight (being that drill string gravity deducts buoyancy), and the axial load of drill string weight indicator indication under the state of creeping into is suspending weight.The difference of drilling tool apparent weight and suspending weight is the pressure of the drill value.Whether normal suspending weight and the pressure of the drill value are used in the drilling and repairing well operation process, can judge actual job (for example preventing that the drilling tool apparent weight is excessive surpasses the peak load that derrick allowed, or the pressure of the drill is excessive and work accident etc. takes place easily) according to these two numerical value.
Can on the monitor main frame of said system, connect output equipment, output judged result, control result etc., described output equipment can be display and/or printer.
Below be detailed description of the present invention:
The key operation instrument in general well site comprises drilling tool, derrick, overhead traveling crane, travelling block, hook, water tap, winch, rotating disk, slush pump etc.
Drilling tool generally comprise kelly bar, drilling rod, brill very, joint, stabilizer, hole enlarger, damper, drill bit and other downhole tool.
Derrick is the instrument that is used for fixing overhead traveling crane and hangs erecting equipments such as tourist bus, hook, water tap, tong and elevator, also is used to remove and deposit drilling tool, oil pipe, sucker rod or cased steel frame construction.
The fixed pulley group that overhead traveling crane is made up of several fixed pulleys, it is fixed on crown.
The running block that travelling block is made up of several movable pulley uses wire rope suspensioning in the derrick inner space during its work, can do upper and lower reciprocating motion.
Hook is the capital equipment in the rig traveling system, and it and travelling block constitute the part of moving about of rig hoisting system together.The effect of hook is when normally creeping into, and hangs water tap and drilling tool; Rising, when boring down, hanging aids such as suspension ring and elevator, and can play, descend drilling tool or sleeve pipe; Finish hoisting heavy, erection equipment or play, put auxiliary lifting work such as derrick.
Water tap is the capital equipment of rig rotary system, links the rig rotary system and the circulating system.The drop handle on its top is connected with hook, and the central tube of bottom is connected by left-hand thread with kelly bar.It mainly acts on and comprises forms of motion, the circulating fluid that hangs drilling tool, changes drilling rod.
Winch is the capital equipment of hoisting system, be used for, down drilling tool and setting of casing, outstandingly hold static drilling tool, when creeping into control the pressure of the drill, send to drilling tool,, unload drilling tool screw thread, hoisting heavy etc.Also comprising winch drum on the winch, is the part of winch hoisting system, comprises master rotor, auxiliary cylinder.Be tied with the wire rope of traveling system on the cylinder,, make wire rope on cylinder, twine and move back rope, the drill string that just can hoist, transfer drilling tool or creep into by the forward or reverse of drum shaft.
Rotating disk is an indispensable equipment in the rotary drilling, and it belongs to the rotary system in the rig composition.Be actually a deceleration and increase and turn round device, can the motion that horizontally rotates that motor transmits be become vertically and rotatablely moves.
Slush pump is one of important process unit of oil-well rig system, is the heart of drilling-fluid circulation system.Effect is that the circulation for drilling fluid provides energy, and promptly the drilling fluid that will have certain severe, viscosity with certain pressure and flow is input into drilling tool, drill bit and annular space and finishes the whole circulation process.
Slurry tank is used for preparation, storage, circulating fluid, and each slurry tank drilling fluid volume sum claims total pond volume.
For the well site, the known parameters that can determine comprises: the bore hole degree of depth (comprising bore hole 1, bore hole 2, bore hole 3), bore hole diameter (comprising bore hole 1, bore hole 2, bore hole 3), bore hole cross-sectional area (comprising bore hole 1, bore hole 2, bore hole 3), drilling rod external diameter, drilling rod internal diameter, drilling tool outer area, drilling tool hollow area, wherein the relation of the relation of the relation of bore hole diameter and bore hole cross-sectional area, drilling rod external diameter and drilling tool outer area, drilling rod internal diameter and drilling tool hollow area is diameter and area of a circle relation.These parameters need store in advance according in the system of the present invention, especially in the monitor main frame of system.
Except above-mentioned known parameters, the method according to this invention or system need comprise through the parameter of sensor measurement: measure well depth, bit location, hook height, the single number that obtains by drawworks sensor; Measure acquisition suspending weight, the pressure of the drill value by weight transduser, measure each slurry tank liquid level that obtains by liquid level sensor.
Need comprise through the data of calculating the back acquisition by above-mentioned two class parameters: drilling tool volume in the mud volume of each slurry tank, total pond volume, theoretical volume, pit shaft volume, the well, wherein:
The mud volume of slurry tank can calculate by liquid level sensor in the slurry tank and mud section area;
Total pond volume is the mud volume sum of all slurry tanks;
Theoretical volume
k=theoretical volume
K-1-Δ T
The variable quantity of drilling tool volume in the variable quantity-well of Δ T=pit shaft volume wherein;
The computational methods of pit shaft volume are:
1. when well depth during less than bore hole 1 degree of depth, pit shaft volume=bore hole 1 cross-sectional area * well depth
2. when well depth less than bore hole 2 degree of depth during greater than bore hole 1 degree of depth, pit shaft volume=bore hole 1 cross-sectional area * bore hole 1 degree of depth+bore hole 2 cross-sectional areas * (well depth-bore hole 1 degree of depth)
3. when well depth less than bore hole 3 degree of depth during greater than bore hole 2 degree of depth, pit shaft volume=bore hole 1 cross-sectional area * bore hole 1 degree of depth+bore hole 2 cross-sectional areas * bore hole 2 degree of depth+bore hole 3 cross-sectional areas * (well depth-bore hole 2 degree of depth);
Wherein,
Bore hole 1 cross-sectional area=π * (bore hole 1 diameter/2)
2
Bore hole 2 cross-sectional areas=π * (bore hole 2 diameters/2)
2
Bore hole 3 cross-sectional areas=π * (bore hole 3 diameters/2)
2
Drilling tool length * (drilling tool outer area-drilling tool hollow area) in drilling tool volume=well.
The above-mentioned needs calculated acquisition through the calculation element that the data of calculating are all passed through in the monitor main frame.
" beneficial effect "
By above-mentioned technological means, the beneficial effect that the present invention can realize comprises:
1, data are more accurate: the present invention is according to the increase of drilling depth, the diameter of every section bore hole, calculates drilling tool to the displacement amount of mud (being the volume of the mud that takies of equal drilling tool volume), makes data more accurate.In addition, the use of ultrasonic liquid level sensor makes also that the measured value precision of native system is higher, real-time is better, also has the device security reliable characteristics
2, effectively judgement, systemic effect diversification: owing to increased drawworks sensor, weight transduser in the system, can be to measuring well depth and record, the drilling well real-time condition can effectively be judged by system, also can provide important reference data for stratigraphic analysis from now on when knowing the particular location that the mud spill and leakage takes place.
3, improve operating efficiency: system monitoring instrument main frame has functions such as data in real time shows, record storage, warning, transmission, for operating personnel's operation provides theoretical foundation, reduce the randomness operation of judging with artificial experience, strengthened the safety of operation greatly, high efficiency.Also alleviate simultaneously operating personnel and monitoring personnel's labour intensity,, increase economic efficiency to guarantee pit shaft, equipment and personnel's life security.
[description of drawings]
Fig. 1 is in the system provided by the invention, the calculation process of theoretical volume.
[specific embodiment]
Following embodiment illustrates the method and system of mensuration drilling well drop ply of the present invention in conjunction with the accompanying drawings without limitation.Those skilled in the art; under the situation that does not break away from the spirit and scope of the present invention; can also make variations and modifications to the present invention, but all equivalent technical schemes all belong to category of the present invention, protection domain of the present invention is limited by the application's claims.
As implementing the place, what used in this well site is the 70 type rigs that the petrolem machinery factory, Lanzhou produces with the calm 52 well well sites of prosperous fort, oil recovery factory, Shenyang, Liaohe Oil Field, and this well main shaft depth gauge divides 5000m into, will make a call to a branch, totally 20 every 50 meters in the time of 4000 meters.Whole rig by hoisting system (by winch, derrick, overhead traveling crane, travelling block, composition such as hook and wire rope), rotary system is (by rotating disk, water tap, down-hole equipment, compositions such as drill bit), drilling-fluid circulation system is (by borehole pump, ground high-low pressure manifold, standpipe, hose, circulation of drilling fluid purified treatment configuration device and down-hole equipment, compositions such as drill bit), power drive device (forming) by diesel engine etc., transmission system is (by gear, sprocket wheel, chain, belt pulley, belt, axle, compositions such as deceleration speed change gear that bearing is formed and clutch), control system is (by by machinery,, gas, compositions such as liquid controlling device), rig substructure is (by the rig floor base, compositions such as pump base and main auxiliary equipment base), the auxiliary equipment of rig is (by power supply, air feed, supply water, fuel feeding, equipment stores, the blowout prevention facility, the configuration store treatment facility of drilling fluid and compositions such as various instrument and recording instrument).
In the well site, have 4 slurry tanks, the MELJ-90C1 type ultrasonic liquid level sensor that Beijing Haoyi Measurement and Control Engineering Co., Ltd. produces all is installed in each slurry tank.It can respond to the mud liquid level in the slurry tank, by measuring the variation of mud liquid level, calculates the volume of jar interior mud automatically through the monitor main frame.
In winch drum one side Beijing Haoyi Measurement and Control Engineering Co., Ltd. is installed and produces MELJ-90J1 type drawworks sensor, it is connected with drum shaft, obtain data such as well depth, bit location, hook height.
On the dead line anchor in well site weight transduser is installed, it is linked to each other with the hydraulic generator of dead line anchor, the hydraulic pressure signal that hydraulic generator is exported is converted into current signal output, calculates current suspending weight and the pressure of the drill value automatically through monitoring host computer.The MELJ-90X1 type weight transduser that this sensor has used Beijing Haoyi Measurement and Control Engineering Co., Ltd. to produce.
The sensor all is connected with the monitor main frame, and monitor has adopted the MEZJ-06 type drilling well monitor of being produced by Beijing Haoyi Measurement and Control Engineering Co., Ltd..
Need to set partial parameters in the monitor main frame according to the situation of this selected drilling tool before drilling well, comprising: the measurement category demarcation of each sensor, alarm threshold setting, well basic parameter are provided with etc., and particular content is as follows:
| Sequence number | Sensor name | Zero point | Full scale |
| 1 | Ultrasonic liquid level sensor one | 0m 3 | 62.7m 3 |
| 2 | Ultrasonic liquid level sensor two | 0m 3 | 76.8m 3 |
| 3 | Ultrasonic liquid level sensor three | 0m 3 | 58.9m 3 |
| 4 | Ultrasonic liquid level sensor four | 0m 3 | 60m 3 |
| 5 | Weight transduser | 0kN | 4200kN |
Bore hole one diameter: 0.4m bore hole one degree of depth: 215m
Bore hole two diameters: 0.35m bore hole two degree of depth: 2100m
Bore hole three diameters: 0.25m bore hole three degree of depth: 4000m
Drilling rod external diameter: 0.18m drilling rod internal diameter: 0.15m
Illustrative example is as follows in operation process:
Embodiment 1
At a time, manually press " 3/ spill and leakage " key on the monitor main frame current well depth that resets, this moment, well depth was 1301.10m
3, record four pond volumes in the slurry tank and be respectively by being installed in ultrasonic liquid level sensor sensor in each slurry tank respectively: 39.5m
3, 42.6m
3, 35.8m
3, 38.5m
3, promptly this moment, total pond volume was 156.4m
3, this value given be current theoretical volume
0, that is: theoretical volume
0=156.4m
3
By the bore hole degree of depth as can be known, well depth 1301.10m is less than bore hole 2 degree of depth 2100m, according to formula:
Pit shaft volume=bore hole 1 cross-sectional area * bore hole 1 degree of depth+bore hole 2 cross-sectional areas * (well depth-bore hole 1 degree of depth)
Result of calculation is as follows:
Pit shaft volume=π * (0.4/2)
2* 215+ π * (0.35/2)
2* (1301.10-215)
＝123.68m
3
Drilling tool volume=(π * (0.18/2)
2-π * (0.15/2)
2) * 1301.10
＝10.11m
3
Drill bit continues to bore down, and when the measurement well depth reached 1338.18m, pit shaft volume and the drilling tool volume of this moment were respectively:
Pit shaft volume=π * (0.4/2)
2* 215+ π * (0.35/2)
2* (1338.18-215)
＝126.98m
3
Drilling tool volume=(π * (0.18/2)
2-π * (0.15/2)
2) * 1338.18
＝10.40m
3
According to formula: theoretical volume
k=theoretical volume
K-1-Δ T
The variable quantity of drilling tool volume in the variable quantity-well of Δ T=pit shaft volume;
Result of calculation is as follows:
ΔT＝(126.98-123.68)-(10.40-10.11)＝3.01m
3
Theoretical volume
1=156.4-3.01=153.39m
3
Total pond volume-theoretical volume
1=157.1-153.39=3.71m
3
That is, always the pond volume is shown as 157.1m
3, mud spill and leakage show value is 3.71m
3, this moment, the actual measured value of mud total pond volume was bigger than theoretical value, not have artificially under the situation of slurry tank filling mud or water, was judged as to occur overflowing in this degree of depth shaft bottom layer.At this moment, search from the geologic information of this well, finding has abundant water resource at the subterranean strata of this degree of depth, the situation in a little liquid infiltration well may occur, but does not influence the normal operation of this well.Therefore, this judgement is correct.
Embodiment 2
At a time, manually press " 3/ spill and leakage " key on the monitor main frame current well depth that resets, this moment, well depth was 3452.20m
3, the pond volume in four slurry tanks is respectively: 41.1m
3, 44.2m
3, 37.4m
3, 39.9m
3, promptly this moment, total pond volume was 162.6m
3, this value is given and is current theoretical volume
k, i.e. theoretical volume
kEqual 162.6m
3
At this moment, well depth 3452.20m is less than bore hole 3 degree of depth 4000m, according to formula:
Pit shaft volume=bore hole 1 cross-sectional area * bore hole 1 degree of depth+bore hole 2 cross-sectional areas * bore hole 2 degree of depth+bore hole 3 cross-sectional areas * (well depth-bore hole 2 degree of depth); Result of calculation is as follows:
Pit shaft volume=π * (0.4/2)
2* 215+ π * (0.35/2)
2* (2100-215)
+π×(0.25/2)
2×(3452.20-2100)
＝251.28m
3
Drilling tool volume=(π * (0.18/2)
2-π * (0.15/2)
2) * 3452.20
＝26.83m
3
Drill bit continues to bore down, and when the measurement well depth was 3689.40m, total pond volume was shown as 150.10m
3, pit shaft volume and the drilling tool volume of this moment are respectively:
Pit shaft volume=π * (0.4/2)
2* 215+ π * (0.35/2)
2* (2100-215)
+π×(0.25/2)
2×(3689.40-2100)
＝261.19m
3
Drilling tool volume=(π * (0.18/2)
2-π * (0.15/2)
2) * 3689.40
＝28.67m
3
According to formula: theoretical volume
k=theoretical volume
K-1-Δ T
The variable quantity of drilling tool volume in the variable quantity-well of Δ T=pit shaft volume;
Result of calculation is as follows:
ΔT＝(261.19-251.28)-(28.67-26.83)＝8.07m
3
Theoretical volume
K+1=162.6-8.07=154.53m
3
Total pond volume-theoretical volume
K+1=150.10-154.53=-4.43m
3
That is, mud spill and leakage show value is-4.43m
3, this moment, the actual measured value of mud total pond volume was littler than theoretical value, illustrated in this degree of depth shaft bottom drop ply to occur not have artificially under the situation of slurry tank extraction mud.At this moment, from the geologic information of this well, search, find lessly, the slit may occur and make circulating mud degree of depth stratum, so when this well section operation, need in good time the mud of in slurry tank, annotating at the subterranean strata lithology and density logging of this degree of depth.Therefore, this judgement is correct.
Claims (6)
1, a kind of method of measuring the drilling fluid spill and leakage is characterized in that said method comprising the steps of:
The actual volume summation of the mud in A, the measurement well site in all slurry tanks obtains total pond volume;
The theoretical volume of the mud in B, the calculating well site in all slurry tanks:
Theoretical volume
k=theoretical volume
K-1-Δ T
Wherein, theoretical volume
kNumerical value under the expression current state, theoretical volume
K-1The last numerical value that obtains that calculates of expression; Δ T represents mud volume change in the well, and computational methods are variable quantities of the interior drilling tool volume of variable quantity-well of Δ T=pit shaft volume;
Wherein, the computational methods of pit shaft volume are:
1. when well depth during less than bore hole 1 degree of depth, pit shaft volume=bore hole 1 cross-sectional area * well depth
2. when well depth less than bore hole 2 degree of depth during greater than bore hole 1 degree of depth, pit shaft volume=bore hole 1 cross-sectional area * bore hole 1 degree of depth+bore hole 2 cross-sectional areas * (well depth-bore hole 1 degree of depth)
3. when well depth less than bore hole 3 degree of depth during greater than bore hole 2 degree of depth, pit shaft volume=bore hole 1 cross-sectional area * bore hole 1 degree of depth+bore hole 2 cross-sectional areas * bore hole 2 degree of depth+bore hole 3 cross-sectional areas * (well depth-bore hole 2 degree of depth)
Wherein, interior drilling tool length * (the drilling tool outer area-drilling tool hollow area) of drilling tool volume=well in the well;
C, calculation procedure A income value and step B income value poor;
D, by the data that step C obtains, judge whether the drilling fluid spill and leakage takes place in the drilling well, and definite spill and leakage position, determination methods is:
If step C gained result be on the occasion of, then being illustrated in not have artificially to extract under the situation of mud from slurry tank, the actual value of total pond volume is greater than theoretical value, step C gained data are spill-out, illustrates excessive layer of this degree of depth shaft bottom appearance;
If step C gained result is a negative value, then being illustrated in does not have artificially to replenish under the situation of excess mud to slurry tank, and the actual value of total pond volume is less than theoretical value, and step C gained data are leakage, illustrate in this degree of depth shaft bottom drop ply to occur;
And the theoretical volume of recording step B gained;
The result of E, output step D.
2, a kind of system that is used to measure the drilling fluid spill and leakage, it is characterized in that comprising liquid level sensor, the weight transduser that is used for measuring drilling process suspending weight and the pressure of the drill value, the drawworks sensor that is used to measure well depth and hook height, monitor main frame and the output equipment of the mud liquid level that is used for measuring the well site slurry tank, connect by cable between described sensor and described monitor main frame, the output equipment, wherein, described monitor main frame comprises:
(1) is used to store the storage device of the data that record by described sensor;
(2) the actual mud volume summation that is used for calculating all slurry tanks of well site is the calculation element of total pond volume;
(3) the theoretical mud volume summation that is used for calculating all slurry tanks of well site is the calculation element of theoretical volume;
(4) be used for the calculation element of the difference of more total pond volume and theoretical volume;
(5) be used for judging according to the difference of total pond volume and theoretical volume whether drilling well the device of drilling fluid spill and leakage and definite spill and leakage position takes place;
(6) be used for the device slurry tank controlled according to above-mentioned judged result.
3, system according to claim 2 is characterized in that described liquid level sensor is mounted in the ultrasonic liquid level sensor in each slurry tank.
4, system according to claim 2 is characterized in that described drawworks sensor is installed in winch drum one side of winch in the well site.
5, system according to claim 2 is characterized in that described weight transduser is installed in the hydraulic generator place of the dead line anchor in well site.
6, system according to claim 2 is characterized in that described output equipment is display and/or printer.
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