CN104018824A - Zonation testing method used for downhole intelligent well shutdown - Google Patents
Zonation testing method used for downhole intelligent well shutdown Download PDFInfo
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- CN104018824A CN104018824A CN201410221386.9A CN201410221386A CN104018824A CN 104018824 A CN104018824 A CN 104018824A CN 201410221386 A CN201410221386 A CN 201410221386A CN 104018824 A CN104018824 A CN 104018824A
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Abstract
The invention provides a zonation testing method used for downhole intelligent well shutdown and belongs to the field of petrochemical engineering. According to the method, a control motor of a single-chip microcomputer is adopted to push and control opening or closing of a liquid outlet channel, then switchgears can automatically switch opening or closing horizons according to programs set on the ground, and zonation mining is carried out on an oil well, or the mode that pulse signals are sent from a well mouth at any time is adopted to control the switchgears; pressure measurement short sections uninterruptedly measure pressure and temperature data for storage; wireless readback meters are placed from the well mouth to the pressure measurement short sections, and read the data stored by the pressure measurement short sections in a wireless mode. By the utilization of the method, the purposes that the testing cycle is shortened and tested stratum pressure recovery data are more real and accurate are achieved, and testing cost is saved at the same time.
Description
Technical field
The invention belongs to petrochemical industry, be specifically related to a kind of zonal testing method for downhole intelligent closing well.
Background technology
The patent No. is that 200620089877 patent discloses a kind of oil well oil production by layer lamination test device, belongs to oil well test device class.Multilayered reservoir exploitation enters the middle and later periods, affected by interlayer interference and cause the contribution rate of each layer different, traditional test mode and measuring method, because instrument and well inner structure cannot accurately reflect individual layer pressure parameter, for this purpose, this device passed through tubing nipple, top connection, instrument in lower contact and sheath is by the inlet opening of bottom, sensor, the downhole probe that signal storage and control panel power set form, by cable, be connected with well head computer, oil reservoir flow that can be to down-hole multiple layer combination, pressure and temperature are carried out single-interval test, realize synchro measure, separate zone production, and do not affect oil well, normally do not produce, on ground, can realize manual control oil production by layer, after all layer bit tests complete, ground-based computer is assessed each layer of position, this measurement device is accurately convenient, and can control arbitrarily corresponding stratum and produce, improve the recovery ratio of oil well.
But there is following technical disadvantages in this technology:
(1) need a pre-buried cable during running string, cable length is equal to the depth of setting of lamination test device.
(2) need a set of electric cable wellhead sealing device, complex structure and cost are high, gas-producing well especially, and electric cable wellhead sealing device is more complicated; If wellhead sealing down-hole afterflow that is not tight and that produce has larger error to explanation results, cannot judge whether Pressure Restoration Ratio reaches stable, the closed-in time cannot be estimated;
(3) well head needs a set of power supply and signal receiving processing circuit.
In hyposmosis-extra-low permeability oil reservoirs, low production fluid oil reservoir or aerogenesis oil reservoir well testing test, because strata pressure recovers slower, cause test period long, if oil well aerogenesis, in pit shaft, gas is owing to having compressibility, after causing surface shut-in still there is afterflow in down-hole, it is serious that the PRESSURE DATA measuring is subject to pit shaft to preserve effects, showing on pressure log-log graph almost only has early stage pit shaft to preserve segment data, then cannot select suitable template to make an explanation, whole test admission data is sufficiently complete and accurate.
Summary of the invention
The object of the invention is to solve the difficult problem existing in above-mentioned prior art, a kind of zonal testing method for downhole intelligent closing well is provided.
The present invention is achieved by the following technical solutions:
A kind of zonal testing method for downhole intelligent closing well, adopt Single-chip Controlling motor pushing to control opening or closing of liquid outlet channel, and then realize program that each derailing switch can arrange by ground and automatically switch and open or close layer position, make oil well carry out layering wheel and adopt;
Or adopt and from the mode of well head transmitted signal, each derailing switch is controlled at any time;
Described method adopts each pressure measurement short to measure incessantly pressure and temperature data storage;
Described method, by being lowered to wireless retaking of a year or grade instrument from well head to each pressure measurement short, reads with wireless mode the data that test pipe nipple is stored.Therefore, adopt after the inventive method, without pre-buried cable and wellhead sealing equipment.
Said method comprising the steps of:
(1) according to test and need of production, the work schedule of each derailing switch is first set before going into the well, guarantee that the same time only has a layer position to open production, test is closed in another layer of position;
(2) according to the order of setting ball seat, a N closing well mechanism, back-off packer and back-off sub, with oil pipe, be connected successively and go into the well from the bottom to top; Described each closing well mechanism comprises packer, pressure measurement short and derailing switch from bottom to up successively;
(3) oil pipe is sprained and is pressed the packer set in back-off packer and each closing well mechanism, and pitching, the compacting of spraining are now given up, and is then lowered to pump and takes out tubing string and normally produce;
(4) work schedule that each derailing switch arranges according to step (1) under the control of single-chip microcomputer opens or closes corresponding layer position;
(5) be lowered to the test data that wireless retaking of a year or grade instrument obtains each pressure measurement short.
Described step (4) further comprises: according to data processed result, determine whether the state of each derailing switch of manual intervention: if data processed result shows test layer position pressure, recover in stable state, state that can each derailing switch of manual intervention, close current producing zone position, open the current layer position of closing, if do not carry out manual intervention, the work schedule that each derailing switch continues to arrange according to step (1) under the control of single-chip microcomputer moves until whole test process finishes.
Described manual intervention realizes by transmitted signal, specific as follows:
Transmitted signal refers to: by pump truck, in sleeve pipe, fill after water suppress, derailing switch that different layers position is controlled in voltage stabilizing and pressure release opens or closes, different layer positions is corresponding different suppresses pressure, voltage stabilizing time and pressure release time;
After transmitted signal, the automatic command of single-chip microcomputer lost efficacy, the instruction works that derailing switch provides by pulse signal.
N in described step (2) is less than or equal to 5 positive integer.
Compared with prior art, the invention has the beneficial effects as follows:
(1) derailing switch in the present invention and pressure measurement short are arranged near layer position, because card sealing section only limits near layer position, thereby layer position while closing pressure recover very fast, test period shortens, it is more true, accurately that the strata pressure of test recovers data.
(2) for gas pay position, also owing to blocking sealing section pit shaft equivalent volume, reduce, the stratum afterflow impact that gas compressibility causes also reduces, the impact that the PRESSURE DATA measuring is like this subject to pit shaft to preserve effect also becomes and is not very serious, this has brought benefit for correct data interpretation, also makes explanation results more approach truth.
(3) the present invention can be lowered to wireless retaking of a year or grade instrument reading out data at any time, understands layer position pressure recovery situation, once confirm that layer bit recovery completes, can take measures in time to test other layer of position or continue and produce, and makes execute-in-place flexible, easy.
(4) the present invention both can control by the programming mode that layer position also can send wireless signal by well head that automatically switches, and did not need pre-buried cable and wellhead sealing and receiving equipment, had saved testing cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of equipment therefor in the embodiment of the present invention.
Fig. 2 is that the present invention is for the step block diagram of the zonal testing method of downhole intelligent closing well.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
The present invention comprises parts as shown in Figure 1 from top to bottom successively for the zonal testing method device used of downhole intelligent closing well, wherein, 1 is back-off sub, when realizing tubing string and giving up and take out, salvage location, 2 is back-off packer, be used for card sealing position, 3 is derailing switch, for automatic or manual intervention, open or close layer position, 4 is wireless retaking of a year or grade instrument, for going into the well at any time and read the data in pressure measurement short 5 in test or manufacturing process, 5 is pressure measurement short, be used for measuring layer position pressure, the parameters such as temperature storage, 6 is packer, be used for card sealing position, 7 is derailing switch, for automatic or manual intervention, open or close layer position, 8 is pressure measurement short, be used for measuring layer position pressure, the parameters such as temperature storage, 9 is packer, be used for card sealing position, 10 is setting ball seat, the pressure of spraining when the set packer.
Embodiment in Fig. 1 is 2 layer positions, if 3 layer positions, with derailing switch 3, pressure measurement short 5, packer, (the superiors are back-off packer to order, other is common packer) replacement setting ball seat 10, by that analogy, tubing string end must be setting ball seat 10, if also increase a layer position, adds a set of packer 6, derailing switch 7 and pressure measurement short 8.
The invention process process is as follows:
According to design, set downhole instrument parameter, running string, all layers position is in open mode, and oil well closes adopts N days, enters design level position and singly adopts, remainder layer position is closed automatically, ground measures production fluid amount, and sampling and testing is moisture, and each layer singly adopted the rear production fluid situation obtaining according to ground and adjusted producing zone position, pass aquatic products oil, can be lowered to pressure retaking of a year or grade instrument therebetween each layer of position pressure is read to analysis.Innovative point of the present invention is: can realize delaminating pressure testing, when individual layer is closed, remainder layer position normally produces, and can the in the situation that of fixed tubular column, adjust producing zone position, reads each stressor layer data and analyzes.
As shown in Figure 2, the present embodiment specifically comprises the following steps:
(1) according to test and need of production, the work schedule of derailing switch 3 and 7 is first set before going into the well, guarantee that the same time only has a layer position to open production, test is closed in another layer of position;
(2) according to the order of setting ball seat 10, packer 9, pressure measurement short 8, derailing switch 7, packer 6, pressure measurement short 5, derailing switch 3, packer 2, back-off sub 1, with oil pipe, connect and go into the well successively from the bottom to top;
(3) the oil pipe pressure set packer of spraining, pitching, the compacting of spraining are now given up, and are lowered to pump and take out tubing string and normally produce;
(4) derailing switch 3 and 7 opens or closes corresponding layer position according to the work schedule arranging;
(5) be lowered to wireless retaking of a year or grade instrument 4 and obtain the test data of pressure measurement short 5 or 8, according to data processed result, determine whether the state of manual intervention derailing switch 3 and 7, if data processed result shows test layer position pressure and recovers in stable state, can manual intervention derailing switch 3 and 7 state (for example, pump pressure equipment continues to be pumped to 5～10 MPas fill water from oil well casing after, voltage stabilizing 5～10 minutes, pump pressure equipment pressure release afterwards 10～50 minutes, again be pumped to 5～10 MPas voltage stabilizing 5～10 minutes, realize thus manual intervention) close current producing zone position, open the current layer position of closing, if do not carry out manual intervention, derailing switch 3 and 7 moves continuation until whole test process finishes according to work schedule.
If be necessary, manual intervention at any time section is carried out, to improve testing efficiency.In test process, can be lowered at any time wireless retaking of a year or grade instrument 4.
Described wireless retaking of a year or grade instrument just enters after Back-off Pipe String central tube always in tubing string central passage, transfers to successively each pressure measurement short place, successively the data of the complete all test layers of retaking of a year or grade position.
The mode that the opening and closing of layer position can be at any time send wireless signal with well head be implemented to control and automatically switch without wait routine, closes targetedly certain layer of position and tests or open certain layer of position and produce.Specific as follows:
Ground key-course bit switch is to suppress x MPa fill water in sleeve pipe by pump truck after, voltage stabilizing y minute, pressure release z minute corresponding certain layer open or close respectively; Wireless signal sends by the built-in instrument of wireless pressure measurement short, gathers at ordinary times and stores, and is lowered to retaking of a year or grade pipe nipple transmits and wake the laggard row exchanges data of single-chip microcomputer up on ground.
The inventive method is applicable to all oil wells, comprises rod-pumped well in straight well, horizontal well and flowing well etc.
Utilize the inventive method, can test at most at present 5 layer positions.
Technique scheme is one embodiment of the present invention, for those skilled in the art, the invention discloses on the basis of application process and principle, be easy to make various types of improvement or distortion, and be not limited only to the described method of the above-mentioned specific embodiment of the present invention, therefore previously described mode is just preferred, and does not have restrictive meaning.
Claims (5)
1. the zonal testing method for downhole intelligent closing well, it is characterized in that: adopt Single-chip Controlling motor pushing to control opening or closing of liquid outlet channel, and then realize program that each derailing switch can arrange by ground and automatically switch and open or close layer position, make oil well carry out layering wheel and adopt;
Or adopt and from the mode of well head transmitted signal, each derailing switch is controlled at any time;
Described method adopts each pressure measurement short to measure incessantly pressure and temperature data storage;
Described method, by being lowered to wireless retaking of a year or grade instrument from well head to each pressure measurement short, reads with wireless mode the data that test pipe nipple is stored.
2. the zonal testing method for downhole intelligent closing well according to claim 1, is characterized in that: said method comprising the steps of:
(1) according to test and need of production, the work schedule of each derailing switch is first set before going into the well, guarantee that the same time only has a layer position to open production, test is closed in another layer of position;
(2) according to the order of setting ball seat, a N closing well mechanism, back-off packer and back-off sub, with oil pipe, be connected successively and go into the well from the bottom to top; Described each closing well mechanism comprises packer, pressure measurement short and derailing switch from bottom to up successively;
(3) oil pipe is sprained and is pressed the packer set in back-off packer and each closing well mechanism, and pitching, the compacting of spraining are now given up, and is then lowered to pump and takes out tubing string and normally produce;
(4) work schedule that each derailing switch arranges according to step (1) under the control of single-chip microcomputer opens or closes corresponding layer position;
(5) be lowered to the test data that wireless retaking of a year or grade instrument obtains each pressure measurement short.
3. the zonal testing method for downhole intelligent closing well according to claim 2, it is characterized in that: described step (4) further comprises: according to data processed result, determine whether the state of each derailing switch of manual intervention: if data processed result shows test layer position pressure, recover in stable state, state that can each derailing switch of manual intervention, close current producing zone position, open the current layer position of closing, if do not carry out manual intervention, the work schedule that each derailing switch continues to arrange according to step (1) under the control of single-chip microcomputer moves until whole test process finishes.
4. the zonal testing method for downhole intelligent closing well according to claim 3, is characterized in that: described manual intervention realizes by transmitted signal, specific as follows:
Transmitted signal refers to: by pump truck, in sleeve pipe, fill after water suppress, derailing switch that different layers position is controlled in voltage stabilizing and pressure release opens or closes, different layer positions is corresponding different suppresses pressure, voltage stabilizing time and pressure release time;
After transmitted signal, the automatic command of single-chip microcomputer lost efficacy, the instruction works that derailing switch provides by pulse signal.
5. the zonal testing method for downhole intelligent closing well according to claim 4, is characterized in that: the N in described step (2) is less than or equal to 5 positive integer.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105134192A (en) * | 2015-08-23 | 2015-12-09 | 邱万成 | Electronically controlled formation test method and formation tester used by same |
| CN105804708A (en) * | 2014-12-29 | 2016-07-27 | 中国石油天然气股份有限公司 | Oil well shaft hierarchical controlling device and control method thereof |
| CN108071387A (en) * | 2016-11-10 | 2018-05-25 | 中国石油天然气股份有限公司 | Under can detect packer sealing in real time when returning layer straddle test apparatus and method |
| CN110130865A (en) * | 2019-06-06 | 2019-08-16 | 中国地质科学院地质力学研究所 | A kind of push-and-pull switch component that can eliminate system compliance |
| CN114152475A (en) * | 2022-02-07 | 2022-03-08 | 东营石油技术与装备产业研究院有限公司 | Closed type high-efficiency sampling device for petroleum detection |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105804708A (en) * | 2014-12-29 | 2016-07-27 | 中国石油天然气股份有限公司 | Oil well shaft hierarchical controlling device and control method thereof |
| CN105134192A (en) * | 2015-08-23 | 2015-12-09 | 邱万成 | Electronically controlled formation test method and formation tester used by same |
| CN105134192B (en) * | 2015-08-23 | 2018-12-21 | 邱万成 | A kind of automatically controlled formation tester |
| CN108071387A (en) * | 2016-11-10 | 2018-05-25 | 中国石油天然气股份有限公司 | Under can detect packer sealing in real time when returning layer straddle test apparatus and method |
| CN110130865A (en) * | 2019-06-06 | 2019-08-16 | 中国地质科学院地质力学研究所 | A kind of push-and-pull switch component that can eliminate system compliance |
| CN110130865B (en) * | 2019-06-06 | 2023-12-29 | 中国地质科学院地质力学研究所 | Push-pull switch assembly capable of eliminating system flexibility |
| CN114152475A (en) * | 2022-02-07 | 2022-03-08 | 东营石油技术与装备产业研究院有限公司 | Closed type high-efficiency sampling device for petroleum detection |
| CN114152475B (en) * | 2022-02-07 | 2022-04-08 | 东营石油技术与装备产业研究院有限公司 | Closed type high-efficiency sampling device for petroleum detection |
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