CN102619503A - Cable stratum tester - Google Patents
Cable stratum tester Download PDFInfo
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- CN102619503A CN102619503A CN2012101038702A CN201210103870A CN102619503A CN 102619503 A CN102619503 A CN 102619503A CN 2012101038702 A CN2012101038702 A CN 2012101038702A CN 201210103870 A CN201210103870 A CN 201210103870A CN 102619503 A CN102619503 A CN 102619503A
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Abstract
The invention discloses a cable stratum tester, which comprises a probe and pressure testing module, a sampling tube module, a hydraulic power module, a pump drainage module, an electronic control module, an underground fluid identification module and a public pipeline which penetrates through each module. A sampling tube of the sampling tube module comprises a fluid storage tube for accommodating own fluid and a pressure-volume-temperature (PVT) sampling tube for accommodating the fluid of a tested stratum. The underground fluid identification module can detect the quality characteristics of the stratum fluid entering a sample pipeline in real time. The pump discharge module has three operating modes, namely a pre-test mode, a fluid pump drainage mode and a fluid back-injection mode. Compared with the conventional cable stratum tester, the cable stratum tester has the advantages that: a high-quality original stratum fluid sample can be obtained; and the obtained stratum fluid sample is analyzed, and then various characteristic parameters of the stratum fluid can be accurately obtained. The cable stratum tester adopts a modular structural design, so that the using flexibility of the tester is improved, and the tester is convenient to assemble and maintain.
Description
Technical field
The present invention relates to a kind of oil well test instrument, especially a kind of cable formation testing device can be obtained high-quality prime stratum fluid sample, and can accurately measure strata pressure.
Background technology
In petroleum industry, obtain accurate formation parameter in the oil well, significant for the production efficiency that improves oil reservoir.In the oil exploration process, for flowing property, the physical parameter of grasping oil-gas Layer, need be to oil and gas reservoir to be carried out definite dynamic evaluation, current at present way is tested the stratum exactly, and this just relates to a kind of formation tester.Formation tester generally includes two kinds of drill-stem test device and cable formation testers.Though drill-stem test device technology maturation is used inconvenience, long construction period, positioning action is complicated, and the safety poor reliability especially is not suitable in deep-well or offshore oil probing.Cable formation tester is with cable it to be transmitted, navigates in the pit shaft of down-hole; Send control signal through ground; Make cable formation tester carry out work; The formation fluid of being located is carried out the suction sampling of certain volume, the formation fluid that sucks cable formation tester is carried out track record, reach the purpose that oil reservoirs are estimated.But because existing formation tester safety in utilization is poor, the maintaining difficulty is unfavorable for dismounting, receives the interference of test environment easily, can not adapt to multiple formation condition, and accurately reflect the true appearance of oil-gas Layer, and it uses desirable not enough.
Summary of the invention
In order to solve the prior art problem, the object of the present invention is to provide a kind of cable formation tester, can obtain high-quality prime stratum fluid sample; And can accurately measure along the strata pressure of pit shaft each point, and can the calculating formation permeability, confirm the oil and gas and water interface; The character of research reservoir is analyzed the prime stratum fluid sample of being obtained, and can confirm the character of layer fluid dubiously; Confirm oil-gas ratio, obtain the various characteristics parameter of formation fluid, cable formation tester has adopted modular structure design; Increase the flexibility that instrument uses, also be convenient to the I& M of instrument simultaneously.
For reaching the foregoing invention purpose, the present invention adopts following technical proposals:
A kind of cable formation tester; Comprise probe and pressure measurement module, sampling tube module, hydraulic power module, pump pump drainage module, electronic control module, for the power module of each module for power supply with run through the public pipeline of each module; Probe and pressure measurement module comprise telescoping ram, sampling probe and the pressure sensor that can stretch; Sampling probe and telescoping ram are provided with dorsad, can be supported in the inwall of pit shaft, and make cable stratum detecting device main body be fixed in pit shaft desired depth position; Tested formation fluid directly gets into sample inlet through sampling probe; Pressure sensor is measured the pressure of the fluid that gets into sampling probe, and detection signal is transmitted to electronic control module in real time, and hydraulic power module is that telescoping ram, sampling probe and pump pump drainage module provide hydraulic power; Pump pump drainage module is aspirated the fluid that gets into sample inlet; Make the sampling tube in the fluid turnover sampling tube module, electronic control module is accepted the signal that the detecting element of each module of control sends, can with signal change with amplify after be sent to ground; Converting the control instruction on ground to control signal controls the executive component of each module; Electronic control module also comprises down-hole depth localization system, and depth localization system in down-hole carries out depth localization to the tested reservoir of pit shaft, lays power cable, signal transmssion line, sample inlet, hydraulic pressure oil feed line and hydraulic oil-returning pipeline in the hollow tube chamber of public pipeline; It is characterized in that: the sampling tube module comprises sampling tube and closed loop pressure control system; Sampling tube comprises and holds liquid storage cylinder that carries fluid and the PVT sampling tube of taking in tested formation fluid, and closed loop pressure control system is connected with the electronic control module signal, and the sampling tube inner chamber is carried out pressure compensation control; The fluid that carries in tested formation fluid and the liquid storage cylinder is all carried through sample inlet; Cable formation tester also comprises the downhole fluid identification module; The signal output part of downhole fluid identification module is connected with the signal receiving end of electronic control module; The downhole fluid identification module detects the mass property of the formation fluid that gets into sample inlet in real time, and data detection signal is sent to electronic control module in real time; Pump pump drainage module has 3 kinds of mode of operations of the reverse injection way of pretest pattern, fluid pump drainage pattern and fluid, when the tested reservoir of pit shaft is carried out depth localization, closes equalizing valve; When opening sampling probe and the tested reservoir of itself and pit shaft being contacted for the first time; At first carry out pretest, in the pretest mode phases, pump pump drainage module sucks formation fluid for the first time through sampling probe; And the pressure build-up curve of the formation fluid that sucked of record; After accomplishing the pretest mode phases, get into fluid pump drainage mode phases, fluid pump drainage pattern is formation fluid that utilization pump pump drainage module will be polluted repeatedly and is discharged in the pit shaft and goes the quality of formation fluid in the while test sample pipeline; And after the mass property of detected formation fluid satisfies sampling requirement; The tested formation fluid in the sample inlet is injected in the PVT sampling tube, in the reverse injection way of fluid, utilization pump pump drainage module is injected into the fluid that carries in the liquid storage cylinder in the stratum goes again.
Said pump pump drainage module comprises two-way pump drainage hydraulic cylinder, electro-hydraulic servo reversal valve, one way valve group and two-position three way magnetic valve; Be specially: two-way pump drainage hydraulic cylinder is a combined type hydraulic cylinder; The hydraulic cylinder unit that comprises two differential concatenations of shared same piston rod; Wherein in first hydraulic cylinder unit, the first piston that is fixedly connected with piston rod one end makes first hydraulic cylinder form I chamber and two the hydraulic cylinder works chambers in II chamber, wherein in second hydraulic cylinder unit; Second piston that is fixedly connected with the piston rod other end makes second hydraulic cylinder also form two the hydraulic cylinder works chambers in III chamber and IV chamber; II chamber and III chamber between two-piston, II chamber and III chamber can according to the different working modes of pump pump drainage module aspirate the fluid that carries in tested formation fluid or the liquid storage cylinder respectively, I chamber and IV chamber are respectively the working media oil pocket; I chamber and IV chamber can form hydraulic control circuit by transfer pipeline through the hydraulic pressure of electro-hydraulic servo reversal valve and hydraulic power module, make the work of combined type hydraulic cylinder balance; II chamber and III chamber are communicated with sampling probe, pit shaft, liquid storage cylinder and PVT sampling tube respectively through same set of one way valve group; The one way valve group also is communicated with pit shaft and sampling tube respectively through two-position three way magnetic valve and is connected; II chamber and III chamber are through the control of one way valve group to the flow throughput direction; The formation fluid that is polluted is discharged in the pit shaft repeatedly goes, after the quality of formation fluid satisfied sampling requirement, II chamber and III chamber were again through the control of two-position three way magnetic valve to the flow throughput direction; Tested formation fluid is injected in the PVT sampling tube; Through of the control of one way valve group to the flow throughput direction, make sampling probe suck formation fluid and inject II chamber and III chamber, the fluid that liquid storage cylinder is carried is injected in the stratum and goes; Wherein one the flow mouth of two-position three way magnetic valve is communicated with pit shaft; The flow mouth of the wherein another one of two-position three way magnetic valve be communicated with liquid storage cylinder and PVT sampling tube respectively, II chamber and III chamber form through one way valve group, two-position three way magnetic valve and carry the fluid delivery pipeline that carries fluid in tested formation fluid and the liquid storage cylinder respectively.
Above-mentioned one way valve group is the bridge type return of being made up of 4 one way valves; Specifically be linked in sequence and form by one way valve A, one way valve B, one way valve C and one way valve D; One way valve B and one way valve A series connection conducting and shape one-level mud one way valve wherein; Wherein also connect conducting and form secondary mud one way valve of one way valve C and one way valve D; One way valve B and the not conducting of one way valve C differential concatenation; One way valve D and also not conducting of differential concatenation of one way valve A, sampling probe is connected with the liquid-inlet of one way valve B and the liquid-inlet of one way valve C simultaneously, and pit shaft is connected with the liquid outlet of one way valve A and the liquid outlet of one way valve D through two-position three way magnetic valve simultaneously; The PVT sampling tube also is connected with the liquid outlet of one way valve A and the liquid outlet of one way valve D simultaneously through two-position three way magnetic valve; The II chamber is connected with the liquid outlet of one way valve B and the liquid-inlet of one way valve A simultaneously, and the III chamber is connected with the liquid outlet of one way valve C and the liquid-inlet of one way valve D simultaneously, makes pump pump drainage module realize pretest pattern, two kinds of mode of operations of fluid pump drainage pattern.
Improvement as technical scheme of the present invention; Pump pump drainage module also comprises another set of one way valve group; The bridge type return that it also is made up of 4 one way valves, specifically being linked in sequence by one way valve E, one way valve F, one way valve G and one way valve H forms, wherein one way valve G and one way valve H series connection conducting and form one-level injecting fluid one way valve; One way valve F and one way valve E series connection conducting and shape secondary injection one-directional fluid valve wherein; One way valve F and the not conducting of one way valve G differential concatenation, one way valve H and also not conducting of differential concatenation of one way valve E, sampling probe is connected with the liquid outlet of one way valve F and the liquid outlet of one way valve G simultaneously; Liquid storage cylinder is connected with the liquid inlet of one way valve E and the liquid inlet of one way valve H through two-position three way magnetic valve simultaneously; The II chamber is connected with the liquid inlet of one way valve F and the liquid outlet of one way valve E simultaneously, and the III chamber is connected with the liquid inlet of one way valve G and the liquid outlet of one way valve H simultaneously, makes pump pump drainage module realize the reverse injection way of fluid; Control special-purpose reversing solenoid valve through the sample inlet branch road and realize two cover one way valve group switch operatings, make pump pump drainage module realize the alternation of reverse injection way of fluid and fluid pump drainage pattern.
Above-mentioned down-hole depth localization system utilizes gamma ray to accomplish the depth localization to tested reservoir.
In fluid pump drainage mode phases, the speed of formation fluid pump drainage is preferably 1cm
3/ s～60cm
3/ s, specified formation fluid pump drainage speed is preferably 40cm
3/ s.In the pretest mode phases, the extraction volume of formation fluid is preferably 1cm
3～20cm
3
As the further improvement of technical scheme of the present invention, on the piston of the hydraulic cylinder unit of pump pump drainage module, Linear displacement transducer is installed, Linear displacement transducer transmits real-time detected piston position signal to electronic control module.
First kind as technical scheme of the present invention is further improved again; The downhole fluid identification module comprises the resistivity measurement meter, and the resistivity measurement meter detects the resistivity of the formation fluid that gets into sample inlet, in fluid pump drainage mode phases; After the resistivity of detected prime stratum fluid satisfies sampling requirement; At once get into the fluid sample sample phase, switch the flow outlet of two-position three way magnetic valve, the formation fluid in sample inlet is injected in the PVT sampling tube.
First kind as technical scheme of the present invention is further improved again further improvement again; The downhole fluid identification module also comprises the optical fluid identification sensor, and the optical fluid identification sensor can be discerned the physical mixed state of formation fluid multiphase flow, detects and distinguish each phase material in real time; And can distinguish F and prime stratum fluid; In fluid pump drainage mode phases, behind the physical mixed state that detects the prime stratum fluid that gets into sample inlet, also get into the fluid sample sample phase at once; Switch the flow outlet of two-position three way magnetic valve, the formation fluid in sample inlet is injected in the PVT sampling tube.
Second kind as technical scheme of the present invention is further improved again; Cable formation tester also comprises two probe modules; Two probe modules comprise two sampling probes, and two sampling probes form 180 ° each other and are horizontally disposed with or laterally arrange in cable formation tester different length position, and two sampling probes match with pressure sensor respectively; Measure stratum horizontal permeability or vertical permeability, perhaps two major-minor each other work of sampling probe.
The third further improvement again as technical scheme of the present invention; Closed loop pressure control system is made up of pressure sensor, dc stepper motor and flow control valve; The formation fluid pressure drop of injecting the PVT sampling tube is controlled in the 0.5MPa, and the pressure that makes the formation fluid that injects the PVT sampling tube is all the time on the bubble point pressure of formation fluid.
The 4th kind as technical scheme of the present invention is further improved again; Cable formation tester also comprises the twin packer module; The twin packer module is partitioned into one section sealed space in pit shaft; Liquid can be discharged into or discharge by the twin packer sealed space, forms miniature drill-stem test device structure.
The 5th kind as technical scheme of the present invention is further improved again; Cable formation tester also comprises quick sampling probe module; Use two pump pump drainage modules to manage over the ground layer fluid through sample inlet and shielding respectively simultaneously and aspirate, significantly reduce and clean the used time of formation fluid.
The 6th kind as technical scheme of the present invention is further improved again, and cable formation tester also comprises the FLOW CONTROL module, and the FLOW CONTROL module can be controlled tested formation fluids speed, and the mensuration of ability enhanced anisotropy permeability.
The 7th kind as technical scheme of the present invention is further improved again; Hydraulic power module is made up of threephase asynchronous, bent axis type axial piston pump, fuel tank, overflow valve, accumulator and pressure switch; Its hydraulic system provides the hydraulic pressure that is not higher than 25MPa ability; Fuel tank has unsteady Oiltank structure, makes the pressure of working media identical with the pressure of environment.
The 8th kind as technical scheme of the present invention is further improved again; Use the module joint that can directly carry out the dismounting connection to connect between each module of cable formation tester; Can plug and play, the module joint comprises power cable joint, signal transmssion line joint, sample inlet joint, hydraulic pressure oil feed line joint and hydraulic oil-returning pipe joint.
The present invention has following conspicuous outstanding substantive distinguishing features and remarkable advantage compared with prior art:
1. cable formation tester of the present invention can obtain high-quality prime stratum fluid sample, and can accurately measure along the strata pressure of pit shaft each point.
2. the measured pressure data of cable formation tester of the present invention can the calculating formation permeability, confirms the oil and gas and water interface, the character of research reservoir.
3. through the Physical Property Analysis of prime stratum fluid sample that cable formation tester of the present invention is obtained, can confirm the character of suspicious layer fluid, confirm oil-gas ratio, obtain the various parameters of formation fluid.Layer fluid is contaminated incipiently obtains when light because these parameters are all in drilling well, therefore has important value.
4. compare with the traditional cable formation tester; Cable formation tester of the present invention has mainly been introduced pump pump drainage technology, downhole fluid recognition technology and closed loop pressure control technology; And the utilization Hydraulic Servo Control Technology, realize high-quality prime stratum fluid sampling function.
5. cable formation tester of the present invention has adopted modular structure design, through expansion, and the convenient combination that realizes multiple function; Improve sampling precision and sampling efficiency, can in oil well, carry out accurate pressure measurement and the sampling of high-quality prime stratum fluid sample, can be according to different test needs; Make up required module flexibly; Strengthen the applicability of this instrument greatly, increased the flexibility that instrument uses, also be convenient to the I& M of instrument simultaneously.
6. cable formation tester of the present invention can be widely used in oil-gas exploration, has boundless application prospect.
Description of drawings
Fig. 1 is that the basic module structure of the embodiment of the invention one cable formation tester is formed sketch map.
Fig. 2 is the schematic diagram of the pump pump drainage module of the embodiment of the invention one.
Fig. 3 is the schematic diagram of the one way valve group of the embodiment of the invention two.
The specific embodiment
In conjunction with accompanying drawing, details are as follows to the preferred embodiments of the present invention:
Embodiment one:
Referring to Fig. 1 and Fig. 2; A kind of cable formation tester; Comprise probe and pressure measurement module 3, sampling tube module 6, hydraulic power module 2, pump pump drainage module 4, electronic control module 1, for the power module of each module for power supply with run through the public pipeline 9 of each module, probe and pressure measurement module 3 comprise telescoping ram 8, sampling probe 7 and the pressure sensor that can stretch, sampling probe 7 and telescoping ram 8 are provided with dorsad; Can be supported in the inwall of pit shaft 17; And make cable stratum detecting device main body be fixed in pit shaft 17 desired depth positions, and tested formation fluid directly gets into sample inlet through sampling probe 7, and pressure sensor is measured the pressure of the fluid that gets into sampling probe 7; And with detection signal in real time to electronic control module 1 transmission; Hydraulic power module 2 provides hydraulic power for telescoping ram 8, sampling probe 7 and pump pump drainage module 4, and 4 pairs of fluids that get into sample inlet of pump pump drainage module aspirate, and makes the sampling tube in the fluid turnover sampling tube module 6; Electronic control module 1 is accepted the signal of the detecting element transmission of each module of control; Can with signal change with amplify after be sent to ground, convert the control instruction on ground to control signal the executive component of each module controlled, electronic control module 1 also comprises down-hole depth localization system; Down-hole depth localization system carries out depth localization to the tested reservoir of pit shaft 17; Lay power cable, signal transmssion line, sample inlet, hydraulic pressure oil feed line and hydraulic oil-returning pipeline in the hollow tube chamber of public pipeline 9, it is characterized in that: sampling tube module 6 comprises sampling tube and closed loop pressure control system, and sampling tube comprises and holds liquid storage cylinder 19 that carries fluid and the PVT sampling tube 18 of taking in tested formation fluid; Closed loop pressure control system is connected with electronic control module 1 signal, and the sampling tube inner chamber is carried out pressure compensation control; The fluid that tested formation fluid and liquid storage cylinder 19 carry is all carried through sample inlet; Cable formation tester also comprises downhole fluid identification module 5; The signal output part of downhole fluid identification module 5 is connected with the signal receiving end of electronic control module 1; Downhole fluid identification module 5 detects the mass property of the formation fluid that gets into sample inlet in real time, and data detection signal is sent to electronic control module 1 in real time; Pump pump drainage module 4 has 3 kinds of mode of operations of the reverse injection way of pretest pattern, fluid pump drainage pattern and fluid, when the tested reservoir of pit shaft is carried out depth localization, closes equalizing valve; When opening sampling probe 7 and the tested reservoir of itself and pit shaft being contacted for the first time; At first carry out pretest, in the pretest mode phases, pump pump drainage module 4 is through the sampling probe 7 first formation fluids that suck; And the pressure build-up curve of the formation fluid that sucked of record; After accomplishing the pretest mode phases, get into fluid pump drainage mode phases, fluid pump drainage pattern is formation fluid that utilization pump pump drainage module 4 will be polluted repeatedly and is discharged in the pit shaft 17 and goes the quality of formation fluid in the while test sample pipeline; And after the mass property of detected formation fluid satisfies sampling requirement; The tested formation fluid in the sample inlet is injected in the PVT sampling tube 18, in the reverse injection way of fluid, the fluid that utilization pump pump drainage module 4 carries liquid storage cylinder 19 is injected in the stratum and goes again.The present embodiment cable formation tester adopts modular structure design; Can be according to different test needs; Make up required module flexibly, strengthened the applicability of this instrument greatly, can in oil well, carry out accurate pressure measurement and the sampling of high-quality prime stratum fluid sample.The pressure data that the present embodiment cable formation tester is measured can the calculating formation permeability, confirms the oil and gas and water interface, the character of research reservoir.Prime stratum fluid sample to being obtained carries out the mass property analysis, can confirm the character of suspicious layer fluid, confirms oil-gas ratio, obtains the various parameters of formation fluid.Layer fluid is contaminated incipiently obtains when light because these parameters are all in drilling well, therefore has important value.
In the present embodiment; Referring to Fig. 2; Said pump pump drainage module 4 comprises two-way pump drainage hydraulic cylinder 11, electro-hydraulic servo reversal valve 10, one way valve group and two-position three way magnetic valve 14; Be specially: two-way pump drainage hydraulic cylinder 11 is combined type hydraulic cylinder, comprises the hydraulic cylinder unit of two differential concatenations of shared same piston rod, wherein in first hydraulic cylinder unit; The first piston that is fixedly connected with piston rod one end makes first hydraulic cylinder form I chamber and two the hydraulic cylinder works chambers in II chamber; Wherein in second hydraulic cylinder unit, second piston that is fixedly connected with the piston rod other end makes second hydraulic cylinder also form two the hydraulic cylinder works chambers in III chamber and IV chamber, and II chamber and III chamber are between two-piston; II chamber and III chamber can according to the different working modes of pump pump drainage module 4 aspirate the fluid that tested formation fluid or liquid storage cylinder 19 carry respectively, I chamber and IV chamber are respectively the working media oil pocket; I chamber and IV chamber can form hydraulic control circuit by transfer pipeline through the hydraulic pressure of electro-hydraulic servo reversal valve 10 and hydraulic power module 2, make the work of combined type hydraulic cylinder balance; II chamber and III chamber are communicated with sampling probe 7, pit shaft 17, liquid storage cylinder 19 and PVT sampling tube 17 respectively through same set of one way valve group; The one way valve group also is communicated with sampling tube with pit shaft 17 respectively through two-position three way magnetic valve 14 and is connected; II chamber and III chamber are through the control of one way valve group to the flow throughput direction; The formation fluid that is polluted is discharged in the pit shaft 17 repeatedly goes, after the quality of formation fluid satisfied sampling requirement, II chamber and III chamber be the control through 14 pairs of flow throughput directions of two-position three way magnetic valve again; Tested formation fluid is injected in the PVT sampling tube 18; Through of the control of one way valve group to the flow throughput direction, make sampling probe 7 suck formation fluid and inject II chamber and III chamber, the fluid that liquid storage cylinder 19 is carried is injected in the stratum and goes; Wherein one the flow mouth of two-position three way magnetic valve 14 is communicated with pit shaft 17; The flow mouth of the wherein another one of two-position three way magnetic valve 14 with is communicated with liquid storage cylinder 19 and PVT sampling tube 18 respectively, II chamber and III chamber are carried the fluid delivery pipeline that carries fluid in tested formation fluid and the liquid storage cylinder 19 respectively through one way valve group, two-position three way magnetic valve 14 formation.
In the present embodiment; Referring to Fig. 2; Above-mentioned one way valve group is the bridge type return of being made up of 4 one way valves; Specifically being linked in sequence by one way valve A, one way valve B, one way valve C and one way valve D forms, one way valve B and one way valve A series connection conducting and shape one-level mud one way valve 12 wherein, wherein also connect conducting and form secondary mud one way valve 13 of one way valve C and one way valve D; One way valve B and the not conducting of one way valve C differential concatenation; One way valve D and also not conducting of differential concatenation of one way valve A, sampling probe 7 is connected with the liquid-inlet of one way valve B and the liquid-inlet of one way valve C simultaneously, and pit shaft 17 is connected with the liquid outlet of one way valve A and the liquid outlet of one way valve D through two-position three way magnetic valve 14 simultaneously; PVT sampling tube 18 also is connected with the liquid outlet of one way valve A and the liquid outlet of one way valve D simultaneously through two-position three way magnetic valve 14; The II chamber is connected with the liquid outlet of one way valve B and the liquid-inlet of one way valve A simultaneously, and the III chamber is connected with the liquid outlet of one way valve C and the liquid-inlet of one way valve D simultaneously, makes pump pump drainage module 4 realize pretest pattern, two kinds of mode of operations of fluid pump drainage pattern.In the present embodiment, pump pump drainage module 4 is the core component of present embodiment cable formation tester, and is as shown in Figure 2, mainly comprises two-way pump drainage hydraulic cylinder 11, the one way valve group, and electro-hydraulic servo reversal valve 10 is formed with two-position three way magnetic valve 14.Pump pump drainage module 4 has pretest, fluid pump drainage and oppositely injects three mode of operations.After the sampling probe 7 of present embodiment cable formation tester stretches out with telescoping ram 8, at first to carry out pretest, judge that whether sampling probe seals with pit shaft, and whether in-place permeability satisfies test request.When fluid pump drainage pattern, mud one way valve 12,13 carries out work, and two-position three way magnetic valve 14 is operated in position, a left side.When pressure oil is supplied with the I chamber; The IV chamber communicates with fuel tank simultaneously; Piston moves from top to bottom, and the formation fluid in the II chamber is discharged in the pit shaft through one way valve A at this moment, and the formation fluid that gets into sample inlet from sampling probe 7 simultaneously also is drawn into the III chamber through one way valve C.When piston motion is breasted the tape, electro-hydraulic servo reversal valve 10 is switched, pressure oil gets into the IV chamber, and the I chamber communicates with fuel tank simultaneously, and piston moves from bottom to top.Formation fluid in the III chamber is discharged in the pit shaft 17 through one way valve D at this moment, and the II chamber then can be through the formation fluid in the one way valve B aspirated specimens pipeline simultaneously.So repeatedly, the suction formation fluid that two-way pump drainage hydraulic cylinder 11 will not stop, the formation fluid that will be polluted then are discharged in the pit shaft 17 of high back pressure.When the formation fluid in monitoring sample inlet meets sampling requirement, then switch two-position three way magnetic valve 14, qualified sample is injected in the PVT sampling tube 18 goes.
In the present embodiment, on the piston of the hydraulic cylinder unit of said pump pump drainage module 4, Linear displacement transducer is installed, Linear displacement transducer with real-time detected piston position signal to electronic control module 1 transmission.During pretest, the extraction volume of fluid is at 1cm
3～20cm
3, through Linear displacement transducer is installed on piston, the utilization Hydraulic Servo Control Technology realizes fluid volume control accurately.
In the present embodiment; Use the module joint that can directly carry out the dismounting connection to connect between each module of cable formation tester; Can plug and play, the module joint comprises power cable joint, signal transmssion line joint, sample inlet joint, hydraulic pressure oil feed line joint and hydraulic oil-returning pipe joint.The present embodiment cable formation tester adopts modular organization; Adopt electronic busses and hydraulic bus technology; Make that each module is relatively independent; Easy, Rapid Combination through each adjacent block end-fitting connect being connected in series of each module of realization, make in each module electric energy, control signal, hydraulic medium and formation fluid independent transmission.
In the present embodiment; Above-mentioned down-hole depth localization system utilizes gamma ray to accomplish the depth localization to tested reservoir; Collect the CD data,, send to the ground monitoring center then to electronic control module 1 transmission; The control to present embodiment cable formation tester duty is realized again to present embodiment cable formation tester emissioning controling signal in the ground monitoring center.
In the present embodiment, in fluid pump drainage mode phases, the speed of formation fluid pump drainage is preferably 1cm
3/ s～60cm
3/ s; Specified formation fluid pump drainage speed is preferably 40cm
3/ s; In the pretest mode phases, the extraction volume of formation fluid is preferably 1cm
3～20cm
3, the minimum volume of pretest can reach 1cm
3
In the present embodiment; When the exploration oil reservoir to uncased wellbore carries out accurate pressure measurement and PVT sampling; Need at first to confirm the degree of depth of test oil reservoirs place pit shaft 17, the utilization cable is transferred to formation tester in the pit shaft, utilizes gamma ray to accomplish the depth localization of instrument in pit shaft 17.The electronic control module 1 of present embodiment can with the signal of each signal supervisory instrument collection change with amplify after be sent to ground, convert the control instruction on ground to control signal the action of present embodiment cable formation tester controlled.
The probe of present embodiment and pressure measurement module 3 also should have the fluid load cell except having the telescoping ram and the sampling probe that can stretch, and like quartz pressure sensor, can record the pressure history of formation fluid, and then preresearch estimates ground laminar flow permeability.When the present embodiment cable formation tester is transferred to appointment pit shaft 17 degree of depth; Hydraulic power module 2 is started working; Sampling probe 7 and telescoping ram 8 are under the driving of hydraulic cylinder; From the present embodiment cable formation tester, stretch out in the opposite direction simultaneously, cable formation tester is fixing in pit shaft 17.Close equalizing valve then, open sampling probe 7, get into the pretest pattern.The piston of two-way pump drainage hydraulic cylinder 11 is according to given volume; Move certain distance; Formation fluid can flow in the two-way pump drainage hydraulic cylinder 11 through sample inlet; The pressure build-up curve of record formation fluid can judge whether sampling probe 7 seals with pit shaft 17, and can be according to pressure build-up curve preresearch estimates ground laminar flow permeability.
When judging sampling probe 7 and stratum good seal, after in-place permeability can satisfy sampling requirement, begin to get into fluid pump drainage pattern.The formation fluid that utilization pump pump drainage module 4 will be polluted repeatedly is discharged in the pit shaft 17 of high back pressure and goes.Simultaneously; The quality of formation fluid in the utilization downhole fluid identification module test sample pipeline; After the quality of formation fluid satisfies sampling requirement, switch two-position three way magnetic valve 14, the formation fluid in the sample inlet is injected in the PVT sampling tube 18 in the sampling tube module 6.
After the pressure measurement and sampling task of a point accomplished on oil storage to be measured stratum, open equalizing valve, close sampling probe 7, the utilization hydraulic power is recovered in the present embodiment cable formation tester sampling probe 7 and telescoping ram 8.Reselect pressure measurement and sample point, repeat said process, carry out repeatedly pressure measurement and sampling.
Embodiment two:
The technical scheme of present embodiment and embodiment one is basic identical, and difference is:
In the present embodiment; Referring to Fig. 3; Pump pump drainage module 4 also comprises another set of one way valve group; The bridge type return that it also is made up of 4 one way valves, specifically being linked in sequence by one way valve E, one way valve F, one way valve G and one way valve H forms, wherein one way valve G and one way valve H series connection conducting and form one-level injecting fluid one way valve 15; One way valve F and one way valve E series connection conducting and shape secondary injection one-directional fluid valve 16 wherein; One way valve F and the not conducting of one way valve G differential concatenation, one way valve H and also not conducting of differential concatenation of one way valve E, sampling probe 7 is connected with the liquid outlet of one way valve F and the liquid outlet of one way valve G simultaneously; Liquid storage cylinder 19 is connected with the liquid inlet of one way valve E and the liquid inlet of one way valve H through two-position three way magnetic valve 14 simultaneously; The II chamber is connected with the liquid inlet of one way valve F and the liquid outlet of one way valve E simultaneously, and the III chamber is connected with the liquid inlet of one way valve G and the liquid outlet of one way valve H simultaneously, makes pump pump drainage module 4 realize the reverse injection way of fluid; Control special-purpose reversing solenoid valve 20,21 through the sample inlet branch road and realize two cover one way valve group switch operatings, make pump pump drainage module 4 realize the alternation of reverse injection way of fluid and fluid pump drainage pattern.When reverse injection way, mud one way valve 12,13 quits work, and the flow direction receives 14,15 controls of injecting fluid one way valve.The fluid that carries in the present embodiment cable formation tester is injected in the stratum, controls special-purpose reversing solenoid valve 20,21 through the sample inlet branch road, makes injecting fluid one way valve 14,15 carry out work, and the course of work and fluid pump drainage pattern are similar.Can store common formation fluid or acid solution in the liquid storage cylinder 19; When extraction of formation fluid; Inject stored solution through two-way pump drainage hydraulic cylinder 11 to prime stratum; Can improve the flox condition of formation fluid, can also further judge the physical property of prime stratum fluid through measuring acidifying strata characteristic variations situation.The volume of liquid storage cylinder 19 can adopt 4.5L, 10L and several kinds of specifications of 20L, selects not isometric liquid storage cylinder 19 to load with the present embodiment cable formation tester as required.
Embodiment three:
The technical scheme of present embodiment and previous embodiment is basic identical, and difference is:
In the present embodiment; The downhole fluid identification module comprises the resistivity measurement meter, and the resistivity measurement meter detects the resistivity of the formation fluid that gets into sample inlet, in fluid pump drainage mode phases; After the resistivity of detected prime stratum fluid satisfies sampling requirement; At once get into the fluid sample sample phase, and switch the flow outlet of two-position three way magnetic valve 14, the formation fluid in sample inlet is injected in the PVT sampling tube 18.Through detection to the resistivity of prime stratum fluid; And frame of reference working stamndard value; Realization is from switching two-position three way magnetic valve 14 committed steps of fluid pump drainage mode phases; Formation fluid in the sample inlet is injected in the PVT sampling tube 18, realizes accurately, in time informing the Ground Engineer, when the formation fluid in the sample inlet reaches the requirement of sampling.
Embodiment four:
The technical scheme of present embodiment and embodiment three is basic identical, and difference is:
In the present embodiment; The downhole fluid identification module also comprises optical fluid identification, and the optical fluid identification sensor can be discerned the physical mixed state of formation fluid multiphase flow, detects and distinguish each phase material in real time; And can distinguish F and prime stratum fluid; In fluid pump drainage mode phases, behind the physical mixed state that detects the prime stratum fluid that gets into sample inlet, also get into the fluid sample sample phase at once; And the flow outlet of switching two-position three way magnetic valve 14, the formation fluid in sample inlet is injected in the PVT sampling tube 18.The optical fluid identification sensor of present embodiment can carry out the fluid composition monitoring in real time; It can distinguish the difference between F, prime stratum fluid and the hydrocarbon; Analysis is oil, water or oil water mixture; Simultaneously also can distinguish liquids and gases, the fluid composition in the final accurately judgement sample pipeline.Present embodiment uses resistivity measurement meter and optical recognition component to combine the mass property of formation fluid in the test sample pipeline simultaneously; After the mass property index of formation fluid satisfies sampling requirement; At once switch two-position three way magnetic valve 14; Formation fluid in the sample inlet is injected in the PVT sampling tube 18, therefore can tells the Ground Engineer more accurately, more in time, when the formation fluid in the sample inlet reaches the requirement of sampling.Optical fluid identification sensor temperature influence is very little, and certainty of measurement is high, can carry out the Accurate Analysis judgement to the composition and the character of formation fluid.
Embodiment five:
The technical scheme of present embodiment and previous embodiment is basic identical, and difference is:
In the present embodiment; Cable formation tester also comprises two probe modules; Two probe modules comprise that 7, two sampling probes of two sampling probes 7 form 180 ° each other and are horizontally disposed with or laterally arrange in cable formation tester different length position, and two sampling probes 7 match with pressure sensor respectively; Measure stratum horizontal permeability or vertical permeability, perhaps two major-minor each other work of sampling probe 6.Two probe modules of present embodiment have strengthened the compare test ability of cable formation tester on the one hand; Two sampling probes 7 can also be realized major-minor sample circuit surveying work mechanism on the other hand; In the use; Can make one of them sampling probe 7 in running order, and another each and every one sampling probe 7 is in backup station, can improve the success rate of formation testing.If sampling probe 7 faults, another sampling probe 7 still can guarantee operate as normal, has reduced the harmful effect of test failure.
Embodiment six:
The technical scheme of present embodiment and previous embodiment is basic identical, and difference is:
In the present embodiment; Closed loop pressure control system is made up of pressure sensor, dc stepper motor and flow control valve; The formation fluid pressure drop of injecting PVT sampling tube 17 is controlled in the 0.5MPa, and the pressure that makes the formation fluid that injects PVT sampling tube 17 is all the time on the bubble point pressure of formation fluid.In the present embodiment, sampling tube module 6 has closed loop pressure control system.Closed loop pressure control system can guarantee that when PVT takes a sample the pressure of formation fluid is all the time on its bubble point pressure.The volume of PVT sampling tube 18 can adopt 500cm
3, also can adopt over-pressure safety device and vacuum insulation heat preservation technology, can be with 6 PVT sampling tubes at every turn, as.Sampling tube module 6 is through to carrying out pressure compensation in the PVT sampling tube 18; Make the pressure that gets into the formation fluid sample to be measured in the PVT sampling tube 18 all the time on its bubble point pressure; Realize overvoltage protection; Guarantee that the variation of composition and character does not take place formation fluid sample, is beneficial to stratum oil storage situation is accurately tested.
Embodiment seven:
The technical scheme of present embodiment and previous embodiment is basic identical, and difference is:
In the present embodiment, cable formation tester also comprises the twin packer module, and the twin packer module is partitioned into one section sealed space in pit shaft 17, and liquid can be discharged into or discharge by the twin packer sealed space, forms miniature drill-stem test device structure.The twin packer module of present embodiment and 4 combinations of pump pump drainage module can make the present embodiment cable formation tester form a small-sized drill-stem test device.Can formation fluid at first be injected in the cyclic spring potted component of twin packer through pump pump drainage module 4, make twin packer in pit shaft 17, be partitioned into one section sealed space.Liquid can be discharged into or discharge by the zone of twin packer sealing, therefore can carry out pressure test of many speed and ejection testing.If in the instrument string of twin packer, add a probe and pressure measurement module, can also use vertical interference testing to obtain the data of large-scale level and vertical permeability.
Embodiment eight:
The technical scheme of present embodiment and previous embodiment is basic identical, and difference is:
In the present embodiment, cable formation tester also comprises quick sampling probe module, uses two pump pump drainage modules 4 to manage over the ground layer fluid through not sample inlet and shielding respectively simultaneously and aspirates.The quick sampling probe module of present embodiment is to adopt the thought of focus sampling; Sampling probe 7 comprises sample inlet and shielding pipeline; Use two pump pump drainage modules 4 through different pipelines formation fluid to be aspirated simultaneously, the speed of getting rid of the F pollution is improved greatly, this can reduce the high-purity required time of formation fluid sample that obtains greatly; Improve sampling efficiency, use when being adapted at the formation sampling of high permeability.
Embodiment nine:
The technical scheme of present embodiment and previous embodiment is basic identical, and difference is:
In the present embodiment, cable formation tester also comprises the FLOW CONTROL module, and the FLOW CONTROL module can be controlled tested formation fluids speed, and the mensuration of ability enhanced anisotropy permeability.The FLOW CONTROL module of present embodiment has can be controlled and the accurate bigger PVT sampling tube 18 of volume of gaging pressure or turnover rate, is the PVT sampling tube 18 of 1L like volume, measurement that can the enhanced anisotropy permeability.
Embodiment ten:
The technical scheme of present embodiment and previous embodiment is basic identical, and difference is:
In the present embodiment; Hydraulic power module 2 is made up of threephase asynchronous, bent axis type axial piston pump, fuel tank, overflow valve, accumulator and pressure switch; Its hydraulic system provides the hydraulic pressure that is not higher than 25MPa ability, and fuel tank has unsteady Oiltank structure, makes the pressure of working media identical with the pressure of environment; Reduce noise and vibration, guarantee the stability and the efficient of hydraulic work system.
Combine accompanying drawing that the embodiment of the invention is illustrated above; But the invention is not restricted to the foregoing description; Can also make multiple variation according to the purpose of innovation and creation of the present invention; Record more formation data if desired, then can select the various optional composition module of cable formation tester, make the function of cable formation tester more powerful with this.Change, the modification of making under all spirit and principles according to technical scheme of the present invention, substitute, combination, simplify; All should be the substitute mode of equivalence; As long as goal of the invention according to the invention; Only otherwise deviate from the know-why and the inventive concept of cable formation tester of the present invention, all belong to protection scope of the present invention.
Claims (18)
1. cable formation tester; Comprise probe and pressure measurement module (3), sampling tube module (6), hydraulic power module (2), pump pump drainage module (4), electronic control module (1), for the power module of each module for power supply with run through the public pipeline (9) of each said module; Said probe and pressure measurement module (3) comprise telescoping ram (8), sampling probe (7) and the pressure sensor that can stretch; Said sampling probe (7) is provided with said telescoping ram (8) dorsad; Can be supported in the inwall of pit shaft (17); And make cable stratum detecting device main body be fixed in pit shaft (17) desired depth position; Tested formation fluid directly gets into sample inlet through said sampling probe (7); Said pressure sensor is measured the pressure of the fluid that gets into said sampling probe (7), and detection signal is transmitted to said electronic control module (1) in real time, and said hydraulic power module (2) is that said telescoping ram (8), sampling probe (7) and said pump pump drainage module (4) provide hydraulic power; Said pump pump drainage module (4) is aspirated formation fluid; The sample inlet that makes formation fluid get into cable formation tester through said sampling probe (7), said electronic control module (1) are accepted the signal that the detecting element of each module of control sends, can with signal change with amplify after be sent to ground; Converting the control instruction on ground to control signal controls the executive component of each module; Said electronic control module (1) also comprises down-hole depth localization system, and said down-hole depth localization system carries out depth localization to the tested reservoir of pit shaft (17), lays power cable, signal transmssion line, sample inlet, hydraulic pressure oil feed line and hydraulic oil-returning pipeline in the hollow tube chamber of said public pipeline (9); It is characterized in that: said sampling tube module (6) comprises sampling tube and closed loop pressure control system; Said sampling tube comprises and holds liquid storage cylinder (19) that carries fluid and the PVT sampling tube (18) of taking in tested formation fluid, and said closed loop pressure is controlled system and is connected with said electronic control module (1) signal, and said sampling tube inner chamber is carried out pressure compensation control;
The fluid that tested formation fluid and said liquid storage cylinder (19) carry is all carried through said sample inlet;
Said cable formation tester also comprises downhole fluid identification module (5); The signal output part of said downhole fluid identification module (5) is connected with the signal receiving end of said electronic control module (1); Said downhole fluid identification module (5) detects the mass property of the formation fluid that gets into sample inlet in real time, and data detection signal is sent to said electronic control module (1);
Said pump pump drainage module (4) has 3 kinds of mode of operations of the reverse injection way of pretest pattern, fluid pump drainage pattern and fluid; When the tested reservoir of pit shaft is carried out depth localization; Close equalizing valve, when opening sampling probe (7) and the tested reservoir of itself and pit shaft being contacted for the first time, at first carry out pretest; In the pretest mode phases; Said pump pump drainage module (4) sucks formation fluid for the first time through said sampling probe (7), and writes down the pressure build-up curve of the formation fluid that is sucked, and after accomplishing the pretest mode phases, gets into fluid pump drainage mode phases; Fluid pump drainage pattern is the said pump pump drainage module of utilization (4) formation fluid that will be polluted repeatedly and is discharged in the pit shaft (17) and goes; Detect the quality of formation fluid in the said sample inlet simultaneously, and after the mass property of detected formation fluid satisfies sampling requirement, the more tested formation fluid in the said sample inlet is injected in the PVT sampling tube (18); In the reverse injection way of fluid, the fluid that uses said pump pump drainage module (4) that said liquid storage cylinder (19) is carried is injected in the stratum and goes.
2. cable formation tester according to claim 1; It is characterized in that; Said pump pump drainage module (4) comprises two-way pump drainage hydraulic cylinder (11), electro-hydraulic servo reversal valve (10), one way valve group and two-position three way magnetic valve (14); Be specially: said two-way pump drainage hydraulic cylinder (11) is a combined type hydraulic cylinder; The hydraulic cylinder unit that comprises two differential concatenations of shared same piston rod; Wherein in first hydraulic cylinder unit, the first piston that is fixedly connected with piston rod one end makes said first hydraulic cylinder form I chamber and two the hydraulic cylinder works chambers in II chamber, wherein in second hydraulic cylinder unit; Second piston that is fixedly connected with the piston rod other end makes said second hydraulic cylinder also form two the hydraulic cylinder works chambers in III chamber and IV chamber; Said II chamber and III chamber are between said two-piston, and said II chamber and III chamber can be according to the tested formation fluid of suction respectively of the different working modes of said pump pump drainage module (4) or the fluids that said liquid storage cylinder (19) carries, and said I chamber and IV chamber are the working media oil pocket;
Said I chamber and IV chamber can form hydraulic control circuit by transfer pipeline through the hydraulic pressure of said electro-hydraulic servo reversal valve (10) and said hydraulic power module (2), make the work of said combined type hydraulic cylinder balance;
Said II chamber and III chamber are communicated with sampling probe (7), pit shaft (17), liquid storage cylinder (19) and PVT sampling tube (18) respectively through same set of one way valve group; Said one way valve group also is connected with said pit shaft (17) and sampling tube respectively through said two-position three way magnetic valve (14); Said II chamber and III chamber are through the control of said one way valve group to the flow throughput direction; The formation fluid that is polluted is discharged in the pit shaft (17) repeatedly goes; After the quality of formation fluid satisfies sampling requirement; Said II chamber and III chamber through the control of said two-position three way magnetic valve (14), are injected into tested formation fluid in the PVT sampling tube (18) again, through the control of said one way valve group to the flow throughput direction; Make said sampling probe (7) suck formation fluid and get into said II chamber and III chamber, the fluid that said liquid storage cylinder (19) is carried is injected in the stratum and goes;
Wherein one the flow mouth of said two-position three way magnetic valve (14) is communicated with said pit shaft (17); The flow mouth of the wherein another one of said two-position three way magnetic valve (14) be communicated with said liquid storage cylinder (19) and PVT sampling tube (18) respectively, said II chamber and III chamber form through said one way valve group, said two-position three way magnetic valve (14) and carry the fluid delivery pipeline that carries fluid in tested formation fluid and the said liquid storage cylinder (19) respectively.
3. cable formation tester according to claim 2; It is characterized in that: the bridge type return of said one way valve group for forming by 4 one way valves; Specifically be linked in sequence and form by one way valve A, one way valve B, one way valve C and one way valve D; One way valve B and one way valve A series connection conducting and shape one-level mud one way valve (12) wherein; Wherein also connect conducting and form secondary mud one way valve (13) of one way valve C and one way valve D; Said one way valve B and the not conducting of one way valve C differential concatenation; Said one way valve D and also not conducting of differential concatenation of one way valve A, said sampling probe (7) is connected with the liquid-inlet of said one way valve B and the liquid-inlet of said one way valve C simultaneously, and said pit shaft (17) is connected with the liquid outlet of said one way valve A and the liquid outlet of said one way valve D through said two-position three way magnetic valve (14) simultaneously; Said PVT sampling tube (18) also is connected with the liquid outlet of said one way valve A and the liquid outlet of said one way valve D simultaneously through said two-position three way magnetic valve (14); Said II chamber is connected with the liquid outlet of said one way valve B and the liquid-inlet of said one way valve A simultaneously, and said III chamber is connected with the liquid outlet of said one way valve C and the liquid-inlet of said one way valve D simultaneously, makes said pump pump drainage module (4) realize pretest pattern, two kinds of mode of operations of fluid pump drainage pattern.
4. cable formation tester according to claim 3; It is characterized in that: said pump pump drainage module (4) also comprises another set of one way valve group; The bridge type return that it also is made up of 4 one way valves; Specifically be linked in sequence and form by one way valve E, one way valve F, one way valve G and one way valve H; Wherein one way valve G and one way valve H series connection conducting and form one-level injecting fluid one way valve (16); One way valve F and one way valve E series connection conducting and shape secondary injection one-directional fluid valve (15) wherein; Said one way valve F and the not conducting of one way valve G differential concatenation, said one way valve H and also not conducting of differential concatenation of one way valve E, said sampling probe (7) is connected with the liquid outlet of said one way valve F and the liquid outlet of said one way valve G simultaneously; Said liquid storage cylinder (19) is connected with the liquid inlet of said one way valve E and the liquid inlet of said one way valve H through said two-position three way magnetic valve (14) simultaneously; Said II chamber is connected with the liquid inlet of said one way valve F and the liquid outlet of said one way valve E simultaneously, and said III chamber is connected with the liquid inlet of said one way valve G and the liquid outlet of said one way valve H simultaneously, makes said pump pump drainage module (4) realize the reverse injection way of fluid; Control special-purpose reversing solenoid valve (20,21) through the sample inlet branch road and realize said two cover one way valve group switch operatings, make said pump pump drainage module (4) realize the alternation of reverse injection way of fluid and fluid pump drainage pattern.
5. according to any described cable formation tester in the claim 2～4; It is characterized in that: on the piston of the hydraulic cylinder unit of said pump pump drainage module (4), Linear displacement transducer is installed, said Linear displacement transducer transmits real-time detected piston position signal to said electronic control module (1).
6. cable formation tester according to claim 5; It is characterized in that: said downhole fluid identification module (5) comprises the resistivity measurement meter; Said resistivity measurement meter detects the resistivity of the formation fluid that gets into said sample inlet; In fluid pump drainage mode phases, after the resistivity of detected prime stratum fluid satisfies sampling requirement, begin formation fluid sampling at once; Switch the flow outlet of said two-position three way magnetic valve (14), will be injected at the formation fluid in the said sample inlet in the said PVT sampling tube (18).
7. cable formation tester according to claim 6; It is characterized in that: said downhole fluid identification module also comprises the optical fluid identification sensor; Said optical fluid identification sensor can be discerned the physical mixed state of formation fluid multiphase flow; Detect and distinguish each phase material in real time, and can distinguish F and prime stratum fluid, in fluid pump drainage mode phases; Behind the physical mixed state that detects the prime stratum fluid that gets into said sample inlet; Also get into the formation fluid sampling stage at once, and switch the flow outlet of said two-position three way magnetic valve (14), will be injected at the formation fluid in the said sample inlet in the said PVT sampling tube (18).
8. cable formation tester according to claim 5; It is characterized in that: it also comprises two probe modules; Said pair of probe module comprises two said sampling probes (7); Two said sampling probes (7) form 180 ° each other and are horizontally disposed with or laterally arrange in said cable formation tester different length position; Said two said sampling probes (7) match with pressure sensor respectively, measure stratum horizontal permeability or vertical permeability, the perhaps major-minor each other work of two said sampling probes (7).
9. cable formation tester according to claim 5; It is characterized in that: state closed loop pressure control system and form by pressure sensor, dc stepper motor and flow control valve; The formation fluid pressure drop of injecting said PVT sampling tube (18) is controlled in the 0.5MPa, and the pressure that makes the formation fluid that injects said PVT sampling tube (18) is all the time on the bubble point pressure of formation fluid.
10. cable formation tester according to claim 5; It is characterized in that: it also comprises the twin packer module; Said twin packer module is partitioned into one section sealed space in pit shaft (17); Liquid can be discharged into or discharge by said twin packer sealed space, forms miniature drill-stem test device structure.
11. cable formation tester according to claim 5; It is characterized in that: cable formation tester also comprises quick sampling probe module; Said quick sampling probe module use simultaneously two pump pump drainage modules (4) respectively through sample inlet and shielding pipeline over the ground layer fluid aspirate, can significantly reduce the used time of formation fluid of cleaning.
12. cable formation tester according to claim 5 is characterized in that: it also comprises the FLOW CONTROL module, and said FLOW CONTROL module can be controlled tested formation fluids speed, the mensuration of enhanced anisotropy permeability.
13. cable formation tester according to claim 5; It is characterized in that: said hydraulic power module (2) is made up of threephase asynchronous, bent axis type axial piston pump, fuel tank, overflow valve, accumulator and pressure switch; Its hydraulic system provides the hydraulic pressure that is not higher than 25MPa ability; Said fuel tank has unsteady Oiltank structure, makes the pressure of working media identical with the pressure of environment.
14. according to any described cable formation tester in the claim 1～4; It is characterized in that: use the module joint that can directly carry out the dismounting connection to connect between its each module; Can plug and play, said module joint comprises power cable joint, signal transmssion line joint, sample inlet joint, hydraulic pressure oil feed line joint and hydraulic oil-returning pipe joint.
15. according to any described cable formation tester in the claim 1～4, it is characterized in that: said down-hole depth localization system utilizes gamma ray to accomplish the depth localization to tested reservoir.
16., it is characterized in that:, be 1cm to the speed of formation fluid pump drainage in fluid pump drainage mode phases according to any described cable formation tester in the claim 1～4
3/ s～60cm
3/ s.
17. cable formation tester according to claim 17 is characterized in that: in fluid pump drainage mode phases, specified formation fluid pump drainage speed is 40cm
3/ s.
18. according to any described cable formation tester in the claim 1～4, it is characterized in that: in the pretest mode phases, the extraction volume of formation fluid is 1cm
3～20cm
3
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| CN201210103870.2A CN102619503B (en) | 2012-04-11 | 2012-04-11 | Cable formation tester |
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