CN210460648U - Shaft and stratum water exploration system based on patch tracing technology - Google Patents
Shaft and stratum water exploration system based on patch tracing technology Download PDFInfo
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- CN210460648U CN210460648U CN201921151402.6U CN201921151402U CN210460648U CN 210460648 U CN210460648 U CN 210460648U CN 201921151402 U CN201921151402 U CN 201921151402U CN 210460648 U CN210460648 U CN 210460648U
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Abstract
The utility model discloses a pit shaft and stratum water exploration system based on paster tracer technique, water exploration system includes oil pipe, installs the spike nipple joint between oil pipe and locates the unidirectional flow equipment of oil pipe installation near the bottom of the artificial well. The laminating of paster spike agent is in the recess of spike nipple joint, but the spike nipple joint is installed the screen cloth of rotation prevention and is protected the paster spike agent, keeps the stability of test. During implementation, the water finding system is placed at the bottom end of an oil pipe close to the bottom of an artificial well of a shaft, different types of tracing short sections are guaranteed to be installed and correspond to different fracturing sections, formation water of each fracturing section flows to the oil pipe in a one-way mode after passing through a patch tracer, water production data of each fracturing section are obtained by detecting the type and the content of the tracer in well fluid, and a main power water production layer is judged. The system is adopted to carry out water exploration, and a packer is not required to be clamped, so that the operation risk can be reduced, and the safe production is ensured; the water-finding device can be based on the existing production flow, does not need to additionally arrange operation conditions for water finding, and is convenient and efficient.
Description
Technical Field
The invention belongs to the technical field of water finding of oil wells, and particularly relates to a shaft and stratum water finding system based on a patch tracing technology.
Background
Shaft water exploration is closely related to the benefit level of oil field development, and different shaft water exploration technical schemes are faced by different shafts. The horizontal well has a longer well completion interval than the vertical well, the oil drainage area of the oil layer is enlarged to improve the yield of the oil well, and the yield of a single well can reach more than 3 times of that of the vertical well. The horizontal well driven by water injection development and bottom water has inevitable water breakthrough, forms underground large circulation of the water injection well and the production well after water breakthrough, continuously increases water content, reduces the production capacity of the oil well, causes dead oil zones to be formed underground, shortens the service life of the oil well, increases the production cost, and greatly reduces the economic benefit of oil field development. Therefore, horizontal well water exploration directly influences the scale application of the horizontal well.
At present, the water exploration test process technology of the directional well and the horizontal well at home and abroad mainly comprises the production fluid profile test, the pulse neutron oxygen activation well logging and the mechanical water exploration tubular column test. The production profile test needs to solve the problems of three aspects of a logging process, sensing series selection and data evaluation, and has the problems that a logging instrument cannot enter a specified position, test data are inaccurate and the like; the pulse neutron activation logging mainly comprises tools such as a remote measuring short joint, a neutron generator, a detector and the like, and has the problems of low precision and only judgment of a water outlet layer; the mechanical water finding pipe column test comprises an intelligent water finding and water plugging integrated process, the packer clamping process is required in the test process, the problem of large operation risk exists, and the problem of changing the original pressure system of a shaft is solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a pit shaft and stratum water finding system based on paster tracer technique can improve the precision and the ageing of water finding, is applicable to the pit shaft of different grade type, does not need the packer card to seal, can not change the original pressure of pit shaft, reduces the operation risk to ensure safety in production.
The utility model discloses a following technical scheme:
a shaft and stratum water exploration system based on a patch tracing technology comprises a water exploration device and an analysis device; the water measuring device comprises a plurality of sections of oil pipes which can be installed in a shaft, a plurality of tracing short sections are installed between the oil pipes, the number of the tracing short sections corresponds to the number of the sections of the fracturing section, each tracing short section can be attached and can limit and protect different chemical patch tracers, the spacing distance between the tracing short sections corresponds to the spacing position of the fracturing section, one-way flow equipment is installed at the position, close to the bottom of an artificial well, of the oil pipe of the shaft, and the one-way flow equipment is guaranteed to be closest to the bottom of the artificial well compared with the installation position of each tracing short section; the analysis device is a gas chromatography-mass spectrometry device and is used for detecting the water sample which is discharged from the well.
By adopting the water finding system, the dissolving-out amount of the tracer depends on the contact area and the contact time, and is equal to the water yield. During production, formation water enters a shaft from a perforation section and flows through the chemical patch tracer, and then the dissolved tracer is mixed and diffused into the formation water; and arranging a unidirectional flow device at the oil pipe passing through the fracturing section, so that the formation water mixed with the tracer enters the oil pipe from the unidirectional flow device and is discharged through a shaft outlet. The arrangement of the unidirectional flow equipment ensures that no other flow passage exists in water flow. And (4) performing wellhead sampling analysis by using an analysis device to determine the types and the contents of the tracers in the samples. No water detection deviation is caused by the formation string in the well bore. The tracing principle ensures that the produced water and the time-varying information of each section under the well are accurately carried out of the well and presented by an interpretation system.
Furthermore, the oil pipes and the tracing short joints and the oil pipes are connected by oil pipe joint hoops.
Further, the one-way flow device is a one-way valve or a one-way screen. The shaft adopts a one-way flow design, ensures that all liquid enters the oil pipe at the lowest end of the oil pipe, does not generate errors caused by the change of a string layer, and fully considers the flow rate change of different fracturing sections when a result interpretation system is constructed, so that the main force water production section can be qualitatively evaluated, the main force water outlet section can be determined, and the accuracy and the feasibility of a test theory can be ensured.
Further, the tracer nipple joint is a nipple joint cylinder matched with the oil pipe, grooves distributed along the circumference of the nipple joint cylinder at intervals are formed in the outer surface of the tracer nipple joint, the shape of the grooves is matched with that of a patch tracer used in water exploration, and an anti-rotation screen is installed on the outer peripheral surface of the nipple joint cylinder.
Further, the groove depth of the tracing nipple is not less than the thickness of the patch tracer. Guarantee that the size of a nipple joint section of thick bamboo is not exceeded after the laminating of paster tracer, make things convenient for the screen cloth to install, avoid causing the increase of frictional resistance in the pit because the size is outstanding.
Further, at least three grooves are uniformly arranged along the circumferential direction of the nipple barrel at intervals, and the covering area of the grooves is not less than 1/2 based on the circumferential area of the nipple barrel corresponding to the size of the grooves. Guarantee that the paster tracer can realize effective cover to a nipple joint section of thick bamboo.
As one of the optional schemes, two ends of the short section of thick bamboo are provided with concave holes along the circumferential direction, the corresponding positions of the screen and the short section of thick bamboo are provided with inward convex buckles, and the screen can be installed and limited through the cooperation of the buckles and the concave holes.
As one of the selectable schemes, concave holes along the circumferential direction are formed in two ends of the short section cylinder, through holes matched in size are formed in the positions, corresponding to the installation position of the screen and the short section cylinder, of the screen, and the screen and the short section cylinder are installed and limited through pins.
Prevent changeing spacingly to the screen cloth on the nipple joint section of thick bamboo, the protection is provided with the tracer nipple joint instrument of paster and goes into the setting position in the pit smoothly to can not cause chemical paster tracer to be damaged or by being washed away because of local rivers are too big in the pit shaft.
Further, the size of the stub barrel after being provided with the screen is consistent with that of the joint hoop. The size of the tracing nipple is limited, and the frictional resistance of the well is reduced.
The utility model discloses following beneficial effect has:
1) by adopting the water detection system containing the utility model, the stability of the patch tracer agent in the laminating and using processes is enhanced, the downhole friction resistance is not increased, and the continuity of tracer detection is ensured;
2) the water detection system does not need to be clamped and sealed by a lower packer, so that the operation risk can be reduced, and the operation safety is ensured. Under the conditions of longer oil pipe and more segmented stages, the more the number of the packers is, the more complex the structure of the pipe column is, the larger the resistance of the pipe column to be put into the pipe column is, and the lower the trafficability characteristic is, the more the risk of well completion operation is obviously increased, the high requirement on the preparation of a well hole and the well hole is required, the high cost is realized, and the comprehensive development benefit of the oil well is reduced;
3) the water finding system is suitable for shafts of different types, can find water under the shaft conditions, temperature and pressure conditions of normal production of a production party, does not need additional operation conditions, can quickly obtain a test result, and is simple and convenient to operate; the pressure is stable, so that water finding errors and errors caused by the change of a series of layers due to the change of the pressure and the shaft can be avoided; the tracing principle ensures that what you see is what you get, and the water production and time-varying information of each section of the underground are accurately carried out of the well and presented by an interpretation system;
4) the shaft of the water finding system adopts a unidirectional flow design, ensures that all liquid enters the oil pipe at the lowest end of the oil pipe, further ensures that no fault caused by layer string change occurs, and improves the accuracy of the test.
Drawings
FIG. 1 is a schematic view of a horizontal well water exploration system of the present invention;
fig. 2 is the utility model discloses a trace nipple joint schematic diagram.
Description of reference numerals: 1 is oil pipe, 2 is the tracer nipple joint, 3 is the festival hoop, 4 is the paster tracer, 5 is the check valve, 6 is the nipple joint section of thick bamboo, 7 is the recess, 8 is the shrinkage pool, 9 is the screen cloth, 10 is the perforation section.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in figure 1, to a certain horizontal well, a pit shaft and stratum water exploration system based on paster tracer technique, oil pipe 1 including a plurality of sections are connected, tracer nipple 2 is installed between oil pipe 1 of horizontal segment through festival hoop 3, 2 quantity of tracer nipple correspond with fracturing segment number, the different kind of paster tracer agent 4 of each tracer nipple 2 laminating, interval distance between tracer nipple 2 corresponds with the interval position of fracturing segment, check valve 5 is installed to 1 nearly artificial well bottom department of oil pipe of horizontal segment to guarantee that check valve 5 is more nearest apart from the pit shaft export in each tracer nipple 2 mounted position.
The tracer nipple is as shown in figure 2, tracer nipple 4 includes a nipple section of thick bamboo 6 that matches with oil pipe, 6 surfaces of a nipple section of thick bamboo set up along its even interval distribution's of circumference three recess 7, and shown recess 7 degree of depth is not less than 4 thickness of paster tracer, and recess 7 shape matches with 4 shapes of used paster tracer when looking for water. Alternatively, the two ends of the short section of thick bamboo 6 are provided with concave holes 8 along the circumference, the corresponding positions of the installation of the screen mesh 9 and the short section of thick bamboo 6 are provided with inward convex buckles, and the screen mesh 9 is installed and limited on the outer surface of the short section of thick bamboo 6 through the cooperation of the buckles and the concave holes 8. The size of the short-section cylinder 6 after being provided with the screen 9 is consistent with that of the joint hoop 3.
The utility model discloses the implementation of water exploration system is as follows:
s1, adding a tracer, screening the patch tracer 4 according to the well condition and the number of fracturing sections of the oil well, selecting the patch tracer 4 matched with the oil well according to the characteristics of the oil well, including characteristics of oil content, temperature, pressure, liquid production amount and the like, selecting a halide tracer consisting of halogenated aromatic compounds, cyclanes or aliphatic compounds as a selection, ensuring the stability of the patch tracer 4 under the condition, and selecting the patch tracers 4 with different types and numbers consistent with the number of the sections according to the number of the fracturing sections under the condition; a tracing short section is arranged between oil pipes 1 through a joint hoop 3, and a one-way valve 5 is arranged at the position of the oil pipe close to the bottom of the artificial well;
s2, dissolving out a tracer, namely, putting the oil pipe 2 with the tracer nipple 2 installed in the S1 into a horizontal section, embedding the pipe putting process into a production side inspection pump or a lower pump pumping operation process without increasing the operation flow, ensuring that the position of each tracer nipple 2 corresponds to the position of each fracturing section, closing the well for 24-48 hours, and ensuring that the patch tracer 4 is immersed into a target medium to be continuously dissolved out and saturated;
s3, diffusing the tracer, performing well opening test, enabling formation water to enter a shaft through the perforation section 10, mixing the dissolved tracer into the formation water, enabling the mixture to flow through the patch tracer 4 of each fracturing section, enabling the mixture to enter the oil pipe 1 through the one-way valve 5 of the oil pipe 1, and carrying out production fluid containing the target tracer out of the shaft;
s4, detecting the tracer, detecting the types and the content of the tracer in the output liquid of different water output time periods, drawing content change graphs corresponding to different tracer in different water output time periods through multiple sampling to obtain the time of the content peak value of each tracer, judging the flow speed of each fracturing section, and providing a basis for analyzing the properties of the fracturing section; and preliminarily judging the main power water production section through tracer content comparison.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. The utility model provides a pit shaft and stratum water exploration system based on paster tracer technique which characterized in that: comprises a water measuring device and an analysis device; the water measuring device comprises a plurality of sections of oil pipes which can be installed in a shaft, a plurality of tracing short sections are installed between the oil pipes, the number of the tracing short sections corresponds to the number of the sections of the fracturing section, each tracing short section can be attached and can limit and protect different chemical patch tracers, the spacing distance between the tracing short sections corresponds to the spacing position of the fracturing section, one-way flow equipment is installed at the position, close to the bottom of an artificial well, of the oil pipe of the shaft, and the one-way flow equipment is guaranteed to be closest to the bottom of the artificial well compared with the installation position of each tracing short section; the analysis device is a gas chromatography-mass spectrometry device and is used for detecting the water sample which is discharged from the well.
2. The water detection system of claim 1 wherein: and the oil pipes and the tracing short joints and the oil pipes are connected by oil pipe joint hoops.
3. The water detection system of claim 1 wherein: the one-way flow equipment is a one-way valve or a one-way sieve tube.
4. The water detection system of claim 1 wherein: the tracer nipple joint is a nipple joint cylinder matched with the oil pipe, grooves which are uniformly distributed along the circumference of the nipple joint cylinder at intervals are formed in the outer surface of the tracer nipple joint, the shapes of the grooves are matched with those of a patch tracer agent used in water exploration, and an anti-rotation screen is installed on the outer peripheral surface of the nipple joint cylinder.
5. The water detection system of claim 4 wherein: the groove depth of the tracing nipple is not less than the thickness of the patch tracer.
6. The water detection system of claim 4 wherein: at least three grooves are uniformly arranged along the circumferential direction of the nipple barrel at intervals, and the covering area of the grooves is not less than 1/2 based on the circumferential surface area of the nipple barrel corresponding to the size of the grooves.
7. The water detection system of claim 4 wherein: the utility model discloses a screen cloth, including nipple joint section of thick bamboo, screen cloth and nipple joint section of thick bamboo, the nipple joint section of thick bamboo both ends set up along circumference's shrinkage pool, the screen cloth is provided with inside bellied buckle with the corresponding position of nipple joint section of thick bamboo installation, and accessible buckle and shrinkage pool cooperation are installed the screen cloth spacing.
8. The water detection system of claim 4 wherein: the utility model discloses a screen cloth, including nipple joint section of thick bamboo, screen cloth and nipple joint section of thick bamboo are installed to the screen cloth, the nipple joint section of thick bamboo both ends set up along circumference the shrinkage pool, the through-hole of matching size is seted up with the corresponding position of nipple joint section of thick bamboo installation to the screen cloth, and it is spacing to install screen cloth and nipple.
9. The water detection system of any one of claims 4-8, wherein: the size of the short section cylinder after the screen mesh is installed is consistent with the size of the joint hoop.
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| CN201921151402.6U CN210460648U (en) | 2019-07-22 | 2019-07-22 | Shaft and stratum water exploration system based on patch tracing technology |
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| CN201921151402.6U CN210460648U (en) | 2019-07-22 | 2019-07-22 | Shaft and stratum water exploration system based on patch tracing technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112302579A (en) * | 2020-11-04 | 2021-02-02 | 中国石油大学(北京) | Horizontal well subsection sand prevention water plugging system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112302579A (en) * | 2020-11-04 | 2021-02-02 | 中国石油大学(北京) | Horizontal well subsection sand prevention water plugging system and method |
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Effective date of registration: 20210415 Address after: 100020 1701, unit 3, 69 Beichen West Road, Chaoyang District, Beijing Patentee after: Beijing Yongyuan Si Science and Technology Development Co.,Ltd. Address before: 100080 NO.607, 69 / F, Yuxin garden, Xisanqi, Haidian District, Beijing Patentee before: Shan Yongbin |