CN108071388A - A kind of formation testing system and method - Google Patents
A kind of formation testing system and method Download PDFInfo
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- CN108071388A CN108071388A CN201611024138.0A CN201611024138A CN108071388A CN 108071388 A CN108071388 A CN 108071388A CN 201611024138 A CN201611024138 A CN 201611024138A CN 108071388 A CN108071388 A CN 108071388A
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- test
- cable
- pressure
- formation testing
- submersible pump
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
Abstract
The invention discloses a kind of formation testing system and methods, belong to field of oil development.The cable that the system is electrically connected including test string, ground control cabinet, one end with ground control cabinet, the orientation spool, electric submersible pump, LPR N that test string includes sequentially connecting from top to bottom by multiple oil pipes test valve, manometer, pressure transmission valve, packer, screen casing, pressure detonator；It is arranged on the perforating gun of pressure detonator lower end；The cable butt joint device being arranged on inside the oil pipe between orientation spool and electric submersible pump, cable butt joint device one end are electrically connected with electric submersible pump fixation, and the other end is electrically connected in oil pipe with the activity of the other end of cable.By the present invention in that with cable butt joint device, when need open electric submersible pump when directly will in cable tripping in oil pipe can readily and easily with cable butt joint device realization dock, formation testing can be accurately and efficiently carried out, effectively reduce the activity duration and improves testing efficiency.
Description
Technical field
The present invention relates to field of oil development, more particularly to a kind of fo pination testing device and method.
Background technology
During the exploration and development in oil field, in order to obtain reliable stratum production capacity data, oil test operation is usually carried out.Ground
Layer test is widely used as a kind of mode of oil test operation, be mainly in drilling process or cased hole completion it
Afterwards, testing tool (is risen including LPR-N tests valve, orientation spool, pressure transmission valve, screen casing, packer, pressure with drilling rod or oil pipe
Quick-fried device, perforating gun etc.) in tripping in pit shaft at position to be tested, LPR-N test valves are opened or closed through terrestrial operation, to target zone
It is tested, obtains the down-hole pressure under different time, and obtain the output sample of test layer, pass through the above-mentioned underground of subsequent analysis
Pressure and output sample are to evaluate stratum, so as to obtain stratum production capacity data.
The test of annular pressure (Annular Pressure Responsive, abbreviation APR) instrument is that formation testing is more common
A kind of test mode, operated using annular pressure control open and close well, in oil test operation, used test string
Usually composition formation testing is coordinated to be applied with electric submersible pump.The formation testing system includes test string, cable, ground control
Cabinet, test string are obtained after by using multiple oil pipes, a variety of dependence test instruments are connected in certain sequence, electric submersible pump conduct
One testing tool of test string, which need to be put into pit shaft, carries out operation, the prior art mostly by oil-pipe external wall every one section
Distance installs a strain relief clamp to fix cable, and the both ends of cable connect electric submersible pump and ground control cabinet respectively, to realize electricity
Latent pump and being electrically connected between ground control cabinet, consequently facilitating under the order of ground control cabinet, electric submersible pump is by production fluid in well
The output sample of the external acquisition test layer of well is drained into, while the down-hole pressure for being also convenient for monitor is transmitted to ground control cabinet.
Inventor has found that the prior art has at least the following problems：
The prior art installs multiple strain relief clamps in oil-pipe external wall and the fixed cable consuming time is more, causes the activity duration
It is long.
The content of the invention
Technical problem to be solved of the embodiment of the present invention is, provides a kind of precise and high efficiency and the activity duration is shorter
Formation testing system and method.Specific technical solution is as follows：
In a first aspect, an embodiment of the present invention provides a kind of formation testing system, including test string, ground control cabinet,
The cable that one end is electrically connected with the ground control cabinet, the test string include sequentially connecting from top to bottom by multiple oil pipes
Orientation spool, electric submersible pump, LPR-N test valve, manometer, pressure transmission valve, packer, screen casing, pressure detonator；
It is arranged on the perforating gun of the pressure detonator lower end；
The cable butt joint device being arranged on inside the oil pipe between the orientation spool and the electric submersible pump, the electricity
Cable docking facilities one end is electrically connected with electric submersible pump fixation, and the other end is movable with the other end of the cable in the oil pipe
Electrical connection.
Specifically, preferably, the cable butt joint device includes：Docking body docks body activity and is electrically connected with described
The top connection connect, the lower contact being electrically connected with the docking body fixation；
Also, the top connection and the lower contact are electrically connected respectively with the cable and electric submersible pump fixation.
Specifically, preferably, it is described docking body upper end set it is fluted, the top connection be arranged to it is described recessed
The convex block that slot is adapted, when the convex block is inserted into the groove, the docking body is electrically connected with the top connection.
Specifically, preferably, the test string further includes reverse circulation valve, it is latent that the electricity is arranged on by the oil pipe
Between pump and LPR-N test valves.
Specifically, preferably, the test string further includes damper, it is connected with the upper end of the pressure detonator.
Specifically, preferably, the formation testing system further includes cable blowout control box, it is arranged on the well head of test pit shaft
The upper end of production tree.
Specifically, preferably, the formation testing system further includes cabinet load wagon, the ground control cabinet is placed on
It is provided with to remove the drum assembly of the cable on the cabinet load wagon, and on the cabinet load wagon.
Specifically, preferably, the orientation spool, the electric submersible pump, the reverse circulation valve, the LPR-N test valve,
The manometer, the pressure transmission valve, the packer, the screen casing, the pressure detonator with the tubing round thread
Connection.
Specifically, preferably, the packer is RTTS packers.
Second aspect, an embodiment of the present invention provides the method that formation testing is carried out using above system, the method bags
It includes：
Test string tripping in is tested in pit shaft, position to be tested is positioned by orientation spool, in the position to be tested
Locate set packer, annular space, which is suppressed, to be opened LPR-N test valve realizations and drive a well, by pressure transmission valve by the annular space above the packer
Pressure transmission to below the packer to start pressure detonator so that perforating gun carries out perforation, the test to test layer
The output sample of layer by screen casing into the test string, close the LPR-N tests valve and realize closing well by then annular space pressure release,
Down-hole pressure is obtained by manometer；
Then, annular space, which is suppressed, is again turned on LPR-N test valve realization and drives a well, by cable tripping in oil pipe with cable pair
Connection device docks, so that ground control cabinet is electrically connected with electric submersible pump, is powered and starts the electric submersible pump drain, obtain the output sample
Product；
Then, annular space pressure release closes the LPR-N tests valve and realizes closing well, and passes through the manometer and obtain again
Down-hole pressure completes test jobs.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：
Formation testing system provided in an embodiment of the present invention with said structure, by the way that APR test strings and electricity are dived
Fit applications are pumped, are capable of the down-hole pressure obtained under different time of precise and high efficiency and the output sample of test layer, by right
They carry out subsequent analysis to obtain stratum production capacity data.In particular, it is electric when needing to open by using cable butt joint device
It will readily and easily can directly be docked during latent pump in cable tripping in oil pipe with cable butt joint device realization, and then quickly and effectively
Ground realization electric submersible pump is electrically connected with ground control cabinet and (so also ensures that the pump efficiency of electric submersible pump is improved).As it can be seen that this hair
The formation testing system that bright embodiment provides can not only accurately and efficiently carry out formation testing, and easy to operate, effectively subtract
Lack the activity duration and improve testing efficiency.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the structure diagram of formation testing system provided in an embodiment of the present invention；
Fig. 2 is the sectional view of cable butt joint device provided in an embodiment of the present invention.
Reference numeral represents respectively：
1 test string, 101 orientation spools, 102 electric submersible pumps, 103 LPR-N test valves, 104 manometers, 105 pressure transmissions
Valve, 106 packers, 107 screen casings, 108 pressure detonators, 109 perforating guns, 110 cable butt joint devices, 1101 docking bodies,
1102 top connections, 1103 lower contacts, 111 reverse circulation valves, 112 dampers；
2 ground control cabinets；
3 cables；
4 oil pipes；
5 cable blowout control boxes；
6 production trees；
7 cabinet load wagons.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
An embodiment of the present invention provides a kind of formation testing system, as shown in Figure 1, the formation testing system includes：Test
The cable 3 that tubing string 1, ground control cabinet 2, one end are electrically connected with ground control cabinet 2, test string 1 include：Pass through multiple oil pipes 4
Orientation spool 101, electric submersible pump 102, LPR-N tests valve 103, manometer 104, the pressure transmission valve sequentially connected from top to bottom
105th, packer 106, screen casing 107, pressure detonator 108；It is arranged on the perforating gun 109 of 108 lower end of pressure detonator；It is arranged on
The cable butt joint device 110 inside oil pipe 4 between orientation spool 101 and electric submersible pump 102,110 one end of cable butt joint device with
Electric submersible pump 102 fixes electrical connection, and the other end is electrically connected in oil pipe 4 with the activity of the other end of cable 3.
The operation principle with regard to formation testing system provided in an embodiment of the present invention, which is given, below describes：
When needing to carry out formation testing, first by the pretreated test pit shaft of 1 tripping in of test string, pass through positioning
Pipe nipple 101 is testing the default position of pit shaft position to be tested (corresponding test layer), and after completing positioning, envelope is set at the test position
Every device 106, test string 1 is fixed in test pit shaft.Then unlatching LPR-N test valves 103 are suppressed by annular space to carry out
It drives a well for the first time.The annular pressure of 106 top of packer is transferred to start pressure by 106 lower section of packer by pressure transmission valve 105
Power initiator 108 makes it light a fire perforating gun 109, so that perforating gun 109 carries out perforation, at this time test layer to test layer
Output sample by screen casing 107 enter test string 1, then pass through annular space pressure release close LPR-N test valve 103 carry out first
Secondary closing well obtains down-hole pressure by manometer 104.
Then, suppressed by annular space be again turned on LPR-N test valve 103 driven a well for the second time, then by 3 tripping in of cable
It is docked in oil pipe 4 with cable butt joint device 110, cable 3 and cable butt joint device 110 are electrically connected at this time, and then realize ground control
Being electrically connected between cabinet 2 processed and electric submersible pump 102.Then, under the control action of ground control cabinet 2, it is powered and starts electric submersible pump 102
Drain is carried out on request, the output sample of above-mentioned test layer is drained on well, and then obtains the output sample, in order to follow-up
Analysis and evaluation is carried out to the output sample.
Then, LPR-N is closed by annular space pressure release and tests second of the closing well of progress of valve 103, and pass through manometer 104
Obtain the down-hole pressure during second of open and close well, wait rise test string 1 when read manometer 104 record pressure
Force data, then carry out subsequent analysis and evaluation.
It can be seen from the above, the formation testing system provided in an embodiment of the present invention with said structure, by the way that APR is tested
102 fit applications of tubing string 1 and electric submersible pump are capable of the production for obtaining down-hole pressure and test layer under different time of precise and high efficiency
Go out sample, stratum production capacity data is obtained by carrying out subsequent analysis to them.In particular, by using cable butt joint device
110, when need open electric submersible pump 102 when directly by 3 tripping in oil pipe 4 of cable can readily and easily with cable butt joint device
110 realize docking, and then fast and effeciently realize that electric submersible pump 102 (so also ensures that electricity is latent with being electrically connected for ground control cabinet 2
The pump efficiency of pump 102 is improved).As it can be seen that formation testing system provided in an embodiment of the present invention can not only be carried out accurately and efficiently
Formation testing, and it is easy to operate, it effectively reduces the activity duration and improves testing efficiency.
It should be noted that in formation testing system provided in an embodiment of the present invention, orientation spool 101, electric submersible pump 102,
LPR-N tests valve 103, manometer 104, pressure transmission valve 105, packer 106, screen casing 107, pressure detonator 108, perforating gun
109 be the common formation test tool in this field, puts up with them below and gives simple general introduction respectively：
Specifically, orientation spool 101 be it is a kind of in perforation for Accurate Determining oil, gas-bearing formation depth short sleeve, generally
Near being arranged at the top of target detection layer at Yi Shang 30m.The common orientation spool 101 in this field is gamma magnetic orientation pipe nipple,
Based on magnetic orientation depth correction skill, before perforation is carried out, tripping in magnetic probe, using natural gamma (GR) and magnetic orientation (CCL)
The composite gun perforation depth correction skill of oil jacket, to obtain perforation school, (concrete principle can refer to Shu Yigang and exist deeply《Oil instrument》(2007
The 3rd phase of volume 21) disclosed in magnetic orientation curve and gamma curve application).The bright grade of Zhang Kai exists《Oil instrument》(2014 12
Month) in disclose a kind of structure of gamma magnetic orientation pipe nipple.It is short that those skilled in the art also can obtain the positioning by purchased in market
Section 101, such as the magnetic locator sub of the general petroleum pipe Co., Ltd sale in Tianjin Dary.
Electric submersible pump 102 be also known as electric submersible centrifugal pump, generally by underground part, above ground portion and realize underground part with
The cable 3 of above ground portion electrical connection is formed, wherein, which is the ground control cabinet 2 described in the embodiment of the present invention,
Including transformer, controller and terminal box, the open and close for controlling electric submersible pump 102 using the ground control cabinet 2, and receive
The formation information that electric submersible pump 102 is gathered, for example, the data such as formation temperature.And the underground part of electric submersible pump 102 is mainly including more
Grade centrifugal pump, submersible electric motor, protector etc., submersible electric motor is electrically connected with cable 3, is opened under the action of ground control cabinet 2
Dynamic or closing, and centrifugal multistage pump multiple centrifugal pump is driven to carry out drain operation.For example, Taizhou City Jiang Feng Beng Ye Co., Ltds produce and sell
The well electric submersible pump for the 200QJ20 series sold is applicable to the present invention；The type of Shanghai Duo pump valve Manufacturing Co., Ltd production
Number it is equally applicable to the present invention for the oil immersion type electric underwater pump of QY200-12-7.5.
LPR-N test valves 103 are also known as LPR-N valves, are a kind of common APR testing tools, realization is suppressed by annular space
It drives a well, closing well is realized by annular space pressure release, while aids in obtaining output sample.For example, which tests valve 103
Including ball valve part, power section.Wherein, ball valve part mainly includes eccentric sphere, ball valve outer barrel, motion arm, power section master
To include power mandrel, nitrogen chamber.During work, after packer 106 is set, mineshaft annulus inflated with nitrogen is suppressed, pressure is made
With in mobile mandrel, compressed nitrogen, power mandrel, which moves down, drives motion arm to make ball valve rotating opening, and realization drives a well.Subsequent ring
Empty pressure release, under nitrogen effect, power mandrel, which moves up, drives power arm that ball valve is made to rotate closing, realizes closing well.LPR-N is tested
The more detailed information of valve 103 can be found in various kinds of document, such as Haitao Liu etc. and exist《Oil and gas well testing》(2002,11(1):46-
48) working condition of the LPR-N test valves disclosed in is with testing APR on the pressure change of its nitrogen chamber or various websites
The correlation of instrument is open, and the embodiment of the present invention does not describe excessively herein.Certainly, those skilled in the art can also be by purchased in market
To obtain LPR-N test valves 103, such as the LPR-N valves that Baoji Mengtai Petroleum Machinery Co., Ltd. produces and sells.
Manometer 104 is the important technology equipment in logging technique field, in embodiments of the present invention, the pressure gauge support
The pressure gauge that cylinder 104 includes support cylinder body and is built in support cylinder body, the pressure gauge have memory function, can measure simultaneously
The down-hole pressure under different time sections is remembered, so as to be read on demand after rising outside well.Specifically, the manometer
Two pressure gauges can be installed in support cylinder body, measure the internal pressure and external pressure of test string 1 respectively.In formation testing
When the end of job acts test string 1, the pressure data on pressure gauge can be read out according to activity duration section, and then seen
Go out pressure change in different time periods to draw pressure curve.Those skilled in the art can obtain the pressure gauge support by purchased in market
Cylinder 104, such as the special installation of the model TT110/45Z2SA of Daqing Saiensi Electronic Equipment Equipment Co., Ltd's sale are straight
Read the manometer of pressure gauge.
Pressure transmission valve 105 is used for the annular pressure of 106 top of packer being transferred to packer 106 in embodiments of the present invention
Lower section starts pressure detonator 108, and then perforating gun 109 is made to carry out perforation to test layer, and those skilled in the art can also lead to
Cross it is purchased in market obtain, such as Zhuhai Ling Kong automation equipments Co., Ltd sale model 250A-65 pneumatic pressure transmission valve.
Pressure detonator 108 and perforating gun 109 are common perforation instruments, are wherein provided in pressure detonator 108
Enclosed igniter head, perforating gun 109 to be driven to carry out perforating job, the structure on pressure detonator 108 can be found in Lu Xuebin etc.
《Engineering explosion》The development and application of full-bore pressure detonator disclosed in (the 4th phase of volume 15 in December, 2009), the present invention
Embodiment does not remake excessive description herein.In addition, perforating gun 109 is sold by buying Renqiu City Chen Yang metal products Co., Ltd
Perforating gun 109 obtain；The oil that screen casing 107 can be sold by buying Hebei Rui Naier petroleum pipelines Equipment Limited
Screen casing obtains.
In embodiments of the present invention, as shown in Figure 2, cable butt joint device 110 includes：Dock body 1101, right with this
It connects the top connection 1102 of 1101 activity electrical connection of body, fix the lower contact 1103 being electrically connected with docking body 1101；On also,
Connector 1102 and lower contact 1103 are electrically connected respectively with cable 3 and the fixation of electric submersible pump 102.It is understood that in docking body
1101st, cable 3 is correspondingly arranged in top connection 1102, lower contact 1103 to realize mutual electrical connection, above-mentioned cable butting
Device 110 is not only simple in structure, and easy to operate.Top connection 1102 therein can be in advance with cable 3 end be connected, applying
When, by the 3 tripping in oil pipe 4 of cable with top connection 1102, by top connection 1102 with dock body 1101 to fetching reality
Existing cable 3 is electrically connected with electric submersible pump 102.
Further, in order to make top connection 1102 and the docking of docking body 1101 more convenient, body is docked
1101 upper end setting is fluted, and top connection 1102 is arranged to the convex block being adapted with groove.It is right when in convex block insertion groove
Body 1101 is connect to be electrically connected with top connection 1102.Wherein, dock the groove of body 1101 upper end shape can there are many, citing
For, can be cylindrical groove, circular groove, triangular groove etc., it is to be understood that at this point, top connection 1102 is convex
The shape of block correspond to groove structure also there are many, for example, its can be adapted with the groove stud bumps, circle
Arc bump, triangular bump etc. so can also make docking body 1101 dock fastening with top connection 1102, ensure that cable pair
Connection device 110 has good electric conductivity.
In embodiments of the present invention, test string 1 further includes reverse circulation valve 111, and electric submersible pump 102 is arranged on by oil pipe 4
It is tested with LPR-N between valve 103.After the completion of test jobs, in order to keep wellbore clean, the embodiment of the present invention is beaten by annular space
Reverse circulation valve 111 of spraining out is pressed, cycle kill-job carries out well-flushing, can then play out cable 3.For example, the sharp mechanic of Puyang section
The reverse circulation valve that journey Technology Co., Ltd. produces and sells is applicable to the present invention.
In embodiments of the present invention, test string 1 further includes the damper 112 being connected with the upper end of pressure detonator 108.
During test jobs, in order to ensure the safety of the downhole tools such as test string 1, cable 3, the embodiment of the present invention passes through damping
Device 112 reduces the instantaneous pressure generated when perforating gun 109 detonates and sharp pounding, achievees the purpose that protect test string 1.Citing
For, the SJ types double-acting shock absorber that coal industrial and mineral goods and materials Group Co., Ltd produces and sells in Shandong is suitable for the present invention.
Further, preferably, the formation testing system further includes the cable blowout control box for the upper end for being arranged on production tree 6
5.It should be noted that the well head of each applicable test pit shaft is respectively provided with wellhead oil tree 6, in order to play lower tubular column.
Cable 3 passes sequentially through cable blowout control box 5 and production tree 6 enters in oil pipe 4, by setting cable blowout control box 5 effectively close
Cable 3 is sealed, liquid leakage in well is prevented, ensure that construction safety.Wherein, cable blowout control box 5 is common for this field, citing
For, Chinese patent (Application No. CN200920106985.0) discloses a kind of Multifunctional fast-assembled type cable blowout control box,
Those skilled in the art can be easily prepared the cable blowout control box 5 by reference to the document, naturally it is also possible to pass through purchase
Commercial product is bought to obtain.
In embodiments of the present invention, orientation spool 101, electric submersible pump 102, reverse circulation valve 111, LPR-N tests valve 103, pressure
Power meter support cylinder 104, pressure transmission valve 105, packer 106, screen casing 107, pressure detonator 108, perforating gun 109 with 4 screw thread of oil pipe
Connection.By using the mode of threaded connection, being fastenedly connected for each component and oil pipe 4 not only ensure that, and it is easy to disassemble, when
Wherein a certain component is conveniently replaceable when being damaged.
In embodiments of the present invention, packer 106 is preferably RTTS packers.RTTS packers are common for this field
, it is a kind of big orifice, the hold-down packer of bidirection press can be insulated, for example, the RTTS packers is changed including J-shaped slot
Position mechanism, slips, packing rubber sleeve and Hydraulic Anchorage mechanism.When preparing to go into the well, J-shaped slot is placed in latched position, and slips, which is in, to be received
Contracting state is that tubing string keeps right to right rotation tubing string when test string, which reaches test position, prepares operation during going into the well
Turn-knob square transfers test string, until packer slip starts to bear tubing string weight, continues thereafter with decentralization test string,
Weight is set desired by being born up to packer, completes to set at this time.RTTS packers are more than fluid column pressure in down-hole formation pressure
During power, the stretching of packer Hydraulic Anchorage mechanism is stuck on casing wall, can prevent from promoting envelope when RTTS packer low pressures are excessive
Every device, cause to lose envelope phenomenon.
In embodiments of the present invention, formation testing system further includes cabinet load wagon 7, and ground control cabinet 2 is placed on cabinet
It is provided with to remove the drum assembly of cable 3 on load wagon 7, and on cabinet load wagon 7.By 1 tripping in pit shaft of test string
Afterwards, easily, rapidly cable 3 can not only be risen and transferred in oil pipe 4 by drum assembly, but also electricity can be passed through
The data acquisition to liquid in test layer is realized in the connection of cable 3, cable butt joint device 110 and electric submersible pump 102.Wherein, cabinet fills
It is located at cable 3 ground control cabinet 2 that the end on well is electrically connected in carrier vehicle 7 and is provided with drain control system, on electric submersible pump 102
It is provided with data collecting system, on data transmission to the well that drain control system is gathered data collecting system by cable 3, from
And convenient for subsequent analysis.
Second aspect, the formation testing system based on above-mentioned offer, an embodiment of the present invention provides carried out using the system
The method of formation testing, this method include：
1 tripping in of test string is tested in pit shaft, position to be tested is positioned by orientation spool 101, in position to be tested
Locate set packer 106, annular space suppresses the unlatching LPR-N test realizations of valve 103 and drives a well, will be on packer 106 by pressure transmission valve 105
The annular pressure of side is transferred to 106 lower section of packer to start pressure detonator 108, so that perforating gun 109 carries out test layer
Perforation, the output sample of test layer enter test string 1 by screen casing 107, and LPR-N test valves 103 are closed in then annular space pressure release
It realizes closing well, in the process, down-hole pressure is obtained by manometer 104；
Then, annular space, which is suppressed, is again turned on the LPR-N test realizations of valve 103 and drives a well, will be in 3 tripping in oil pipe 4 of cable and cable
Docking facilities 110 dock, so that ground control cabinet 2 is electrically connected with electric submersible pump 102, is powered and starts 102 drain of electric submersible pump, obtain production
Go out sample；
Then, annular space pressure release closes LPR-N test valves 103 and realizes closing well, in the process, passes through manometer 104
Down-hole pressure is obtained again, completes test jobs.
It will be appreciated by persons skilled in the art that it will need to carry out pit shaft drifting before 1 tripping in pit shaft of test string, scrape
It cuts to remove the solid matter that shaft in wall adheres to, such as burr, the remaining cement of well cementation, while can also check shape after well cementation
Into artificial bottom of a well whether meet formation testing requirement.Well-flushing operation is then carried out, in order to make pit shaft clean, removes and is glued on shaft in wall
Attached solid matter or viscous crude, wax substance, so that lower part is constructed；Well killing fluid in well is adjusted simultaneously to be allowed to meet wanting for perforation
It asks, prevents after ground layer open, sewage enters stratum and causes formation contaminant.
It using method provided by the invention, is suppressed, pressure release is turned on and off LPR-N test valves 103, obtained by annular space twice
Pressure data and test layer output sample inside test string 1 during open and close well twice are taken, by above-mentioned pressure
Data and output sample, which carry out subsequent analysis, can obtain desired production capacity data, realize formation testing.This method construction time is short, and electricity is latent
The pump efficiency of pump 102 is high, and operating cost is low, convenient for large-scale promotion application.
It is understood that in method for testing strata provided in an embodiment of the present invention, test string 1 is obtained to test layer
The number of internal pressure and test layer output sample is not limited only to above-mentioned, for example, can be twice, three times, it is four inferior,
It is made choice according to specific hole condition, ensures to obtain the accuracy of result.
The foregoing is merely presently preferred embodiments of the present invention, the protection domain being not intended to limit the invention, all in this hair
Within bright spirit and principle, any modifications, equivalent replacements and improvements are made should be included in protection scope of the present invention
Within.
Claims (10)
1. a kind of formation testing system, including：Test string (1), ground control cabinet (2), one end and the ground control cabinet (2)
The cable (3) of electrical connection, which is characterized in that the test string (1) includes：Sequentially connected from top to bottom by multiple oil pipes (4)
Logical orientation spool (101), electric submersible pump (102), LPR-N test valves (103), manometer (104), pressure transmission valve (105), envelope
Every device (106), screen casing (107), pressure detonator (108)；
It is arranged on the perforating gun (109) of the pressure detonator (108) lower end；
It is arranged on the cable butting dress of the oil pipe (4) inside between the orientation spool (101) and the electric submersible pump (102)
It puts (110), described cable butt joint device (110) one end is electrically connected with the electric submersible pump (102) fixation, and the other end is in the oil pipe
(4) it is electrically connected in the activity of the other end of the cable (3).
2. formation testing system according to claim 1, which is characterized in that the cable butt joint device (110) includes：It is right
It connects body (1101), the top connection (1102) being electrically connected with docking body (1101) activity, dock body with described
(1101) lower contact (1103) of fixed electrical connection；
Also, the top connection (1102) and the lower contact (1103) respectively with the cable (3) and the electric submersible pump (102)
Fixed electrical connection.
3. formation testing system according to claim 2, which is characterized in that the upper end of the docking body (1101) is set
Fluted, the top connection (1102) is arranged to the convex block being adapted with the groove, when the convex block is inserted into the groove
When, the docking body (1101) is electrically connected with the top connection (1102).
4. formation testing system according to claim 1, which is characterized in that the test string (1) further includes reacting cycle
Valve (111) is arranged on the electric submersible pump (102) by the oil pipe (4) and the LPR-N is tested between valve (103).
5. formation testing system according to claim 1, which is characterized in that the test string (1) further includes damper
(112), the upper end with the pressure detonator (108) is connected.
6. formation testing system according to claim 1, which is characterized in that the formation testing system further includes cable and prevents
Spray box (5) is arranged on the upper end of the wellhead oil tree (6) of test pit shaft.
7. formation testing system according to claim 1, which is characterized in that the formation testing system further includes cabinet dress
Carrier vehicle (7), the ground control cabinet (2) is placed on the cabinet load wagon (7), and is set on the cabinet load wagon (7)
It is equipped with to remove the drum assembly of the cable (3).
8. formation testing system according to claim 4, which is characterized in that the orientation spool (101), the electric submersible pump
(102), the reverse circulation valve (111), LPR-N test valves (103), the manometer (104), the pressure transmission valve
(105), the packer (106), the screen casing (107), the pressure detonator (108) connect with the oil pipe (4) screw thread
It connects.
9. formation testing system according to claim 1, which is characterized in that the packer (106) is RTTS packers.
10. the method for carrying out formation testing using any one of the claim 1-9 systems, which is characterized in that the method bag
It includes：
Test string (1) tripping in is tested in pit shaft, position to be tested is positioned by orientation spool (101), described to be tested
Set packer (106) at position, annular space suppress unlatching LPR-N test valves (103) realization and drive a well, will by pressure transmission valve (105)
Annular pressure above the packer (106) is transferred to below the packer (106) to start pressure detonator (108),
So that perforating gun (109) carries out test layer perforation, the output sample of the test layer enters the test by screen casing (107)
Tubing string (1), then annular space pressure release close the LPR-N test valves (103) and realize closing well, in the process, pass through pressure gauge support
Cylinder (104) obtains down-hole pressure；
Then, annular space, which is suppressed, is again turned on LPR-N test valve (103) and realizes to drive a well, will be in cable (3) tripping in oil pipe (4)
It is docked with cable butt joint device (110), so that ground control cabinet (2) is electrically connected with electric submersible pump (102), being powered, it is latent to start the electricity
(102) drain is pumped, obtains the output sample；
Then, annular space pressure release closes the LPR-N test valves (103) and realizes closing well, in the process, passes through the pressure gauge support
Cylinder (104) obtains down-hole pressure again, completes test jobs.
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| CN201611024138.0A CN108071388A (en) | 2016-11-17 | 2016-11-17 | A kind of formation testing system and method |
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| CN109751039A (en) * | 2018-12-15 | 2019-05-14 | 洛阳润成石化设备有限公司 | Underground formation testing electric-controlled hydraulic modular test system |
| CN110617057A (en) * | 2019-09-17 | 2019-12-27 | 中海艾普油气测试（天津）有限公司 | Full-pipe type underground testing pipe column and testing method thereof |
| CN110748325A (en) * | 2018-07-23 | 2020-02-04 | 中国石油天然气股份有限公司 | Production pipe column and using method thereof |
| CN111155992A (en) * | 2018-11-07 | 2020-05-15 | 中国石油天然气股份有限公司 | Multilayer combined operation oil testing device and method |
| CN111852403A (en) * | 2019-04-23 | 2020-10-30 | 邓选华 | Perforation, test and electric submersible pump liquid discharge triple-connection operation process |
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| CN114607344A (en) * | 2020-12-03 | 2022-06-10 | 中国石油天然气股份有限公司 | Acid fracturing integrated pipe column and acid fracturing method |
| CN114687703A (en) * | 2020-12-29 | 2022-07-01 | 中国石油化工股份有限公司 | Once reverse circulation shut-in test valve |
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Application publication date: 20180525 |