CN101403293B - Column type down-hole shut-in well delamination pressure test technique suitable for oil well - Google Patents
Column type down-hole shut-in well delamination pressure test technique suitable for oil well Download PDFInfo
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- CN101403293B CN101403293B CN2008101375004A CN200810137500A CN101403293B CN 101403293 B CN101403293 B CN 101403293B CN 2008101375004 A CN2008101375004 A CN 2008101375004A CN 200810137500 A CN200810137500 A CN 200810137500A CN 101403293 B CN101403293 B CN 101403293B
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Abstract
The invention relates to a pipe string type downhole shut-in layering pressure measurement process and a pressure measurement pipe string. The process comprises the following steps: (1) an original well pipe string is taken out; (2) the working sequences of electrical control downhole on-off actuators are set on the basis that the production lasts for 72h after well completion; (3) a pressure measurement production proration pipe string is put into the well; (4) the positions of the downhole tools are verified; (5) a packer is released by pumping the pressure to 15 to 18MPa; (6) the pipe string is lifted up; (7) the original well pipe string is put into the well and well completion production is carried out; (8) each stage of downhole on-off actuator is turned off after carrying out production for 72h; (9) a pump is stopped on the ground simultaneously; (10) the shut-in layering pressure measurement is finished; (11) then the original pipe string is taken out; (12) a fishing pipe string is put into the well; (13) the original string is put into the well; and (14) each layer of manometer data is played back, and oil pool data is layered. The process avoids the problems that the original production state is destroyed and the downhole afterflow influence can be eliminated in the existing pressure measurement process technology.
Description
Technical field:
The present invention relates to the used a kind of pressure measurement technology in oilfield test field, especially a kind of pipe column type downhole closing delaminating pressure testing technology that is applicable to oil well.
Background technology:
At present; In oil well, carry out delaminating pressure testing with production mandrel structure; The pressure gauge that dependence is lowered to stopper type obtains zonal pressure with the shutoff of pressure measurement interval; Because the stopper type pressure gauge delaminating pressure testing mode of pulling successively can destroy the original production status of oil-water well, the result of delaminating pressure testing there is certain influence.Carry out the oil well pressure measurement for the commingling production oil well and mainly carry out, to obtain pressure data dark in the oil well through the mode that steel wire generally hangs survey.Its explanation results is really and accurately for the individual layer production well; Can satisfy the needs of geology department; But as far as the commingling production oil well; Because the pressure data that obtains can only be the average effect of complete each oil reservoir of well, can not reflect effective formation information of layering, thereby be difficult to directly be used in reference to the exploitation of Oil Guide field.Particularly differ greatly when multilayer oil reservoir strata pressure, even exist when phenomenon such as pouring in down a chimney, such layer parameter fifty-fifty can the wrong existence of covering contradiction.Especially the oil field gets into waterflooding extraction after the later stage; Because interlayer is more outstanding with the interior contradiction of layer; Such as stratified formations pressure, permeability, the isoparametric difference of degree of porosity, flood front advance speed differs, and causes exert oneself situation, moisture content of each layer of oil well to differ greatly; Have a strong impact on the steady production of oil well, be not suitable for the oil field development situation and traditional steel wire generally hangs the pressure measurement mode of survey.
Summary of the invention:
In order to overcome disadvantages of background technology; The present invention provides a kind of pipe column type downhole closing delaminating pressure testing technology that is applicable to oil well; Delaminating pressure testing technology and pressure measurement tubing string can carry out downhole closing under oil well ordinary production state; Accomplish the pressure measurement technology of layering static pressure test, thereby avoided destruction original production state that present pressure measurement technology faced and the problem that can't eliminate down-hole afterflow influence.
Technical scheme of the present invention is: this pipe column type downhole closing delaminating pressure testing technology that is applicable to oil well comprises the following steps:
(1), at first trip out former well casing post, scraping, drifting guarantee that the delaminating pressure testing tubing string can be lowered to the target zone position smoothly;
(2), be benchmark according to producing 72 hours after the completion, set automatically controlled downhole on-off actuator work schedule;
(3), be lowered to have automatically controlled downhole on-off actuator, manometric delaminating pressure testing is joined the product tubing string;
(4), after tubing string puts in place, carry out the magnetic orientation test, examine the downhole tool position;
(5), after the tubing string degree of depth examines, carry out oil pipe through pump truck and just suppressing 15～18MPa, discharge packer, voltage stabilizing 10 minutes guarantees that packers at different levels discharge fully;
(6), the upper lifting pipe post, positive tube post 18～20 circles discharge back-off sub, tubing string goes out to throw off from back-off sub;
(7), trip out back-off sub top tubing string;
(8), be lowered to former well casing post and oil well pump extension, completion production;
(9), produce after 72 hours, oil well gets into the steady production state, automatically controlled downhole on-off actuator arrives the scheduled time, closes according to setting sequential, and the interval of interest laminated distributor under well is closed, and begins to measure the static pressure restore data;
(10), ground termination of pumping simultaneously, close the production gate, avoid the pressure measurement result is exerted an influence;
(11), treat closing well after at least 3 days, obtain complete static pressure data;
(12), trip out former well casing post through operation;
(13), following fishing string, salvage delaminating pressure testing and join the product tubing string;
(14), descend former well casing post, completion ordinary production;
(15), each stressor layer of playback counting certificate, make an explanation, obtain the layering oil reservoir data of each interval.
Pressure measurement tubing string used in the such scheme is made up of at least 2 unit groups, and each unit group is connected to form by packer, automatically controlled downhole on-off actuator and pressure gauge in order, and this pressure measurement tubing string piezometer tube post upper end is connected with the back-off sub lower end and is connected with plug.
The present invention has following beneficial effect: the present invention comes oil well is tested from the angle of minute interval; Better understand each interlayer characteristic of oil well; Especially the layering static pressure data that obtains can truly reflect the pressure gap of different pay intervals, can understand the formation parameter between different layers through explaining.Grasped the oil well delamination PRESSURE DATA; Can grasp the dynamic of oil well from the segmentation angle; The potentiality of can be reasonable adjustment oilfield development program, optimize production well proration, select rational producing pressure differential, fully excavating each oil reservoir provide the measure foundation, and the interpretation results of layering static pressure data has important directive significance to the exploitation adjustment of multicompletion well.This technology can be carried out downhole closing under oil well ordinary production state, accomplish the pressure measurement technology of delaminating pressure testing, thereby has avoided destruction original production state that present pressure measurement technology faced and the problem that can't eliminate down-hole afterflow influence.
Description of drawings:
Fig. 1 is a layering testing pressure down hole layering tubing string;
Fig. 2 is 3 layers of layering static pressure stacking chart.
Among the figure: the former well pump of 1-is hung 2-back-off sub, 3-packer, the automatically controlled downhole on-off actuator of 4-, 5-pressure gauge, 6-plug, 7-oil reservoir.
The specific embodiment:
Below in conjunction with embodiment the present invention is described further:
This pipe column type downhole closing delaminating pressure testing technology that is applicable to oil well comprises the following steps:
(1), at first construct through underground work and trip out former well casing post, scraping, drifting guarantee that the delaminating pressure testing tubing string can be lowered to the target zone position smoothly;
(2), be benchmark according to producing 72 hours after the completion, set automatically controlled downhole on-off actuator work schedule, produce after 72 hours the electric-controlled switch device after the completion and close automatically, corresponding payzone is carried out switch controls;
(3), be lowered to and have manometric delaminating pressure testing and join the product tubing string; Joining to produce uses packer packing to separate the interval that each needs pressure measurement in the tubing string; Interlayer uses oil pipe to connect electric-controlled switch device and pressure measurement pressure gauge, and packer and automatically controlled downhole on-off actuator carry out floor switch control;
(4), after tubing string puts in place, carry out the magnetic orientation test, examine the downhole tool position;
(5), after the tubing string degree of depth examines, carry out oil pipe through pump truck and just suppressing 15～18MPa, fully guarantee to discharge packer, voltage stabilizing 10 minutes guarantees that packers at different levels discharge fully;
(6), the upper lifting pipe post, observe through weight indicator, guarantee that tubing string is minimum at back-off sub place load, positive tube post 18～20 circles fully guarantee to discharge back-off sub, tubing string goes out to throw off from back-off sub;
(7), trip out back-off sub top tubing string;
(8), be lowered to former well casing post and oil well pump extension, completion production;
(9), produce after 72 hours, automatically controlled downhole on-off actuator arrives the scheduled time, automatically controlled downhole on-off actuators at different levels are closed according to setting sequential, interval of interest begins to measure the static pressure restore data;
(10), ground termination of pumping simultaneously, close the production gate, avoid the pressure measurement result is exerted an influence;
(11), treat closing well after 3 days, the concrete time decides according to the actual conditions of well, the well that has needs the time of some months, just can obtain complete layering static pressure data;
(12), trip out former well casing post through operation;
(13), following fishing string, salvage delaminating pressure testing and join the product tubing string;
(14), descend former well casing post, completion ordinary production;
(15), each stressor layer of playback counting certificate, make an explanation, obtain the layering oil reservoir data of each interval.
This pressure measurement technology uses packer and automatically controlled downhole on-off actuator to carry out floor switch control mainly through the underground work construction.Use packer packing to separate the interval that each needs pressure measurement; Interlayer uses oil pipe to connect electric-controlled switch device and pressure measurement pressure gauge; The sequential that automatically controlled downhole on-off actuator configures according to going into the well is down carried out switch motion, and corresponding payzone is carried out switch control, can accomplish downhole closing, pressure measurement; Through the laminated distributor under well closing well, can avoid the afterflow in the down-hole oil tube that pressure test is impacted like this.
The delaminating pressure testing test of 3 adjacent intervals that the application said method carries out on a bite oil well, after 3 intervals carried out downhole closing, the pressure of 3 interval recovered trend and pressure has obvious difference.Shown in following Fig. 2 curve,, can understand the detailed formation information of branch interval through to the explanation of pressure data separately.Iff uses the mode of original general pressure measurement; Measured pressure is the force value of the comprehensive synergistic effect of these 3 layer group pressure recoveries; Making an explanation through such data to reflect real strata condition, especially all the more so to the very large oil well of plurality of layers differences.Therefore on oil well, carry out the test of downhole closing zonal pressure and just become very valuable.
Claims (1)
1. pipe column type downhole closing delaminating pressure testing technology that is applicable to oil well is characterized in that:
(1), at first trip out former well casing post, scraping, drifting guarantee that the delaminating pressure testing tubing string can be lowered to the target zone position smoothly;
(2), be benchmark according to producing 72 hours after the completion, set automatically controlled downhole on-off actuator work schedule;
(3), be lowered to have automatically controlled downhole on-off actuator, manometric delaminating pressure testing is joined the product tubing string;
(4), after tubing string puts in place, carry out the magnetic orientation test, examine the downhole tool position;
(5), after the tubing string degree of depth examines, carry out oil pipe through pump truck and just suppressing 15～18MPa, discharge packer, voltage stabilizing 10 minutes guarantees that packers at different levels discharge fully;
(6), the upper lifting pipe post, positive tube post 18～20 circles discharge back-off sub, tubing string goes out to throw off from back-off sub;
(7), trip out back-off sub top tubing string;
(8), be lowered to former well casing post and oil well pump extension, completion production;
(9), produce after 72 hours, oil well gets into the steady production state, automatically controlled downhole on-off actuator arrives the scheduled time, closes according to setting sequential, and the interval of interest laminated distributor under well is closed, and begins to measure the static pressure restore data;
(10), ground termination of pumping simultaneously, close the production gate, avoid the pressure measurement result is exerted an influence;
(11), treat closing well after at least 3 days, obtain complete static pressure data;
(12), trip out former well casing post through operation;
(13), following fishing string, salvage delaminating pressure testing and join the product tubing string;
(14), descend former well casing post, completion ordinary production;
(15), each stressor layer of playback counting certificate, make an explanation, obtain the layering oil reservoir data of each interval.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008101375004A CN101403293B (en) | 2008-11-11 | 2008-11-11 | Column type down-hole shut-in well delamination pressure test technique suitable for oil well |
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| CN2008101375004A CN101403293B (en) | 2008-11-11 | 2008-11-11 | Column type down-hole shut-in well delamination pressure test technique suitable for oil well |
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| CN101403293B true CN101403293B (en) | 2012-06-06 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8015869B2 (en) * | 2008-09-02 | 2011-09-13 | Schlumberger Technology Corporation | Methods and apparatus to perform pressure testing of geological formations |
| CN104018824A (en) * | 2014-05-23 | 2014-09-03 | 中国石油化工股份有限公司江汉油田分公司采油工艺研究院 | Zonation testing method used for downhole intelligent well shutdown |
| CN104989340A (en) * | 2015-06-17 | 2015-10-21 | 成都高普石油工程技术有限公司 | Oil well water injection oil extraction method |
| CN105114061B (en) * | 2015-08-31 | 2018-05-04 | 中国石油天然气股份有限公司 | A kind of horizontal well fixed tubular column Multi-parameter Combined Tool tests quick searching pipe column and method |
| CN105569635B (en) * | 2015-12-31 | 2018-12-28 | 中国石油天然气股份有限公司 | A kind of horizontal well produced fluid cross section technical matters tubing string and test method |
| CN109577955A (en) * | 2018-11-02 | 2019-04-05 | 中国石油天然气股份有限公司 | A kind of oil well shut-in pressure survey technique |
| CN112832724A (en) * | 2021-01-06 | 2021-05-25 | 中国石油天然气股份有限公司 | Drainage and production integrated tubular column capable of intelligently controlling pressure of shaft and use method of drainage and production integrated tubular column |
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| CN1289889A (en) * | 2000-10-10 | 2001-04-04 | 大庆石油管理局测井公司 | Hierarchical monitor method for parameters of oil recovering layer in oil well |
| CN2435513Y (en) * | 2000-03-24 | 2001-06-20 | 大庆油田有限责任公司采油工艺研究所 | Device for measuring downhole pressure of production oil well |
| CN101050699A (en) * | 2006-12-11 | 2007-10-10 | 大庆油田有限责任公司 | Method for obtaining thick oil layer vertical permeability using same layer vertical interference test well and test tubular pole |
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Patent Citations (3)
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| CN2435513Y (en) * | 2000-03-24 | 2001-06-20 | 大庆油田有限责任公司采油工艺研究所 | Device for measuring downhole pressure of production oil well |
| CN1289889A (en) * | 2000-10-10 | 2001-04-04 | 大庆石油管理局测井公司 | Hierarchical monitor method for parameters of oil recovering layer in oil well |
| CN101050699A (en) * | 2006-12-11 | 2007-10-10 | 大庆油田有限责任公司 | Method for obtaining thick oil layer vertical permeability using same layer vertical interference test well and test tubular pole |
Non-Patent Citations (1)
| Title |
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| 汪嘉联等."扶余油田西区分层监测技术及其在开发中的应用".《油气井测试》.1991,(第4期),49-50. |
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Effective date of registration: 20211222 Address after: 163453 No. 99 Zhongyuan Road, Daqing, Heilongjiang Patentee after: Daqing Oilfield Co.,Ltd. Patentee after: PetroChina Co Ltd Address before: 163453 No. 99 Zhongyuan Road, Daqing, Heilongjiang Patentee before: Daqing Oilfield Co.,Ltd. |