CN213597938U - Acid leaching layered acidification layered water injection integrated tubular column - Google Patents
Acid leaching layered acidification layered water injection integrated tubular column Download PDFInfo
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- CN213597938U CN213597938U CN202022309628.3U CN202022309628U CN213597938U CN 213597938 U CN213597938 U CN 213597938U CN 202022309628 U CN202022309628 U CN 202022309628U CN 213597938 U CN213597938 U CN 213597938U
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Abstract
The utility model relates to an acid leaching layered acidification layered water injection integration tubular column. The technical scheme is as follows: an upper-layer measuring and adjusting water distributor and an upper-layer acidizing valve are arranged between the top packer and the middle packer, a middle measuring and adjusting water distributor and a middle acidizing valve are arranged between the middle packer and the lower-layer packer, a lower-layer measuring and adjusting water distributor, a constant-pressure water distributor and a ball-throwing type check valve are arranged at the lower part of the lower-layer packer, a constant-pressure water distributor is arranged below the lower-layer measuring and adjusting water distributor, and a ball-throwing type check valve is arranged below the constant-pressure water distributor. The beneficial effects are that: the utility model uses the ball throwing type backwashing valve to perform acid leaching on the whole shaft, thus effectively treating the blockage of the whole shaft level near wellbore area; then, the cooperation of the constant-pressure water distributor, the upper pickling valve, the middle pickling valve and the three-layer measuring and adjusting water distributor is used for completing layered acidification and layered water injection once pipe column, so that the integrated well completion of three layers can be realized, the production cost is greatly reduced, and the operation timeliness is obviously improved.
Description
Technical Field
The utility model relates to an oil development field, in particular to pickling layering acidizing layering water injection integration tubular column.
Background
Water injection is an effective means for maintaining the stratum pressure of an oil layer, realizing high and stable yield of the oil field and improving the development effect of the oil field, most of the oil fields in China are heterogeneous oil reservoirs with multiple oil layers, the difference between the layers is obvious, and a layered water injection process technology is required; the acidification of the water injection well is to utilize the chemical corrosion action of the acid liquor to corrode the formation plugs and partial formation minerals, enlarge, extend and communicate formation cracks, so as to recover and improve the formation permeability, reduce the resistance of oil gas flowing into the bottom of the well, improve the injection capacity of the water injection well and realize the purpose of increasing the injection of the water well; aiming at a multilayer oil layer, a layered acidification process is generally adopted to ensure the acidification effect; the initial water injection well is generally completed by firstly putting a separate-layer acidizing pipe column and then putting a separate-layer water injection pipe column, and the completion mode needs to put the pipe columns twice, so that the operation procedures and the operation time are increased, and the well occupation period is prolonged; in recent years, a series of integrated process technologies of layered acidification and layered water injection are started to be adopted, so that the operation cost and the operation period are effectively reduced; however, for a water injection well, due to the water quality of water injection or other factors, the blockage between the well bore and a near well zone is the most serious, but the blockage is removed by injecting acid layer by layer in the existing once-through tubular column, but only by adopting a squeezing mode, acid enters a stratum from partial flow channels, the whole well bore and the near well zone near the well bore are lack of comprehensive treatment, and the effect is not good; in order to solve the problem, the invention provides an acid leaching layered acidification layered water injection integrated tubular column.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an above-mentioned defect to prior art exists provides an acid leaching layering acidizing layering water injection integration tubular column, trades the layer and the soluble ball technique is accomplished layering acidizing and layering water injection one-time tubular column through the liquid accuse, can realize the integration well completion of three position, reduction in production cost by a wide margin is showing and is improving the operation ageing.
The utility model provides a pickling layering acidizing layering water injection integration tubular column, its technical scheme is: the process pipe column is put into a casing 1 through an oil pipe 2 and mainly comprises a top packer 6, an upper measuring and adjusting water distributor 7, an upper acidizing valve 8, a middle packer 9, a middle measuring and adjusting water distributor 10, a middle acidizing valve 11, a lower packer 12, a lower measuring and adjusting water distributor 13, a constant pressure water distributor 14, a ball throwing type check valve 15, a sieve pipe 16 and a plug 17, wherein the top packer 6, the middle packer 9 and the lower packer 12 divide an annular space between the oil pipe 2 and the casing 1 into an upper oil layer 3, an middle oil layer 4 and a lower oil layer 5, the upper measuring and adjusting water distributor 7 and the upper acidizing valve 8 are arranged between the top packer 6 and the middle packer 9, the middle measuring and adjusting water distributor 10 and the middle acidizing valve 11 are arranged between the middle packer 9 and the lower packer 12, the lower measuring and adjusting water distributor 13, the constant pressure water distributor 14 and the ball throwing check valve 15 are arranged at the lower part of the lower packer 12, a constant pressure water distributor 14 is arranged below the lower layer measuring and adjusting water distributor 13, and a ball-throwing type check valve 15 is arranged below the constant pressure water distributor 14.
Preferably, the lower part of the ball-throwing type check valve 15 is connected with a screen pipe 16, and a plug 17 is arranged below the screen pipe 16.
Preferably, the upper acidification valve 8 is filled with an upper soluble ball, and the middle acidification valve 11 is filled with a middle soluble ball, wherein the diameter of the upper soluble ball is larger than that of the middle soluble ball.
Preferably, the intermediate acidification valve 11 comprises an acidification valve body 11.1 and an inner sliding sleeve 11.2, the upper part of the acidification valve body 11.1 is of a conical structure, and the inner sliding sleeve 11.2 is arranged at the central bottom of the acidification valve body 11.1.
Preferably, the conical structure of the upper part of the acidification valve body 11.1 realizes the plugging fit by putting the medium soluble ball 11.3 into the acidification valve body.
The utility model has the advantages that: the utility model uses the ball throwing type backwashing valve to perform acid leaching on the whole shaft, thus effectively treating the blockage of the whole shaft level near wellbore area; then, the fixed-pressure water distributor, the upper pickling valve, the middle pickling valve and the upper, middle and lower three-layer measuring and adjusting water distributor are matched, layered acidification and layered water injection are completed by one-time pipe column through a hydraulic control layer changing technology and a soluble ball technology, integrated well completion of three layers can be realized, production cost is greatly reduced, and operation time effectiveness is remarkably improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic diagram of the construction of an intermediate acidification valve;
in the upper diagram: the device comprises a casing 1, an oil pipe 2, an upper oil layer 3, an intermediate oil layer 4, a lower oil layer 5, a top packer 6, an upper testing and adjusting water distributor 7, an upper acidizing valve 8, an intermediate packer 9, an intermediate testing and adjusting water distributor 10, an intermediate acidizing valve 11, a lower packer 12, a lower testing and adjusting water distributor 13, a constant pressure water distributor 14, a ball throwing type check valve 15, a sieve pipe 16, a plug 17, an upper soluble ball 8.1, an acidizing valve body 11.1, an inner sliding sleeve 11.2 and a middle soluble ball 11.3.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
Example 1, referring to fig. 1, the present invention provides an integrated string for acid leaching layered acidification layered water injection, wherein a process string is put into a casing 1 through an oil pipe 2, the process string mainly comprises a top packer 6, an upper layer measuring and adjusting water distributor 7, an upper layer acidification valve 8, a middle packer 9, a middle measuring and adjusting water distributor 10, a middle acidification valve 11, a lower layer packer 12, a lower layer measuring and adjusting water distributor 13, a constant pressure water distributor 14, a ball throwing type check valve 15, a sieve pipe 16 and a plug 17, the top packer 6, the middle packer 9 and the lower layer packer 12 divide an annulus between the oil pipe 2 and the casing 1 into an upper oil layer 3, an intermediate oil layer 4 and a lower oil layer 5, the upper layer measuring and adjusting water distributor 7 and the upper layer acidification valve 8 are arranged between the top packer 6 and the middle packer 9, the middle measuring and adjusting water distributor 10 and the middle acidification valve 11 are arranged between the middle packer 9 and the lower layer packer 12, the lower part of the lower packer 12 is provided with a lower layer measuring and adjusting water distributor 13, a constant pressure water distributor 14 and a ball-throwing type check valve 15, the constant pressure water distributor 14 is arranged below the lower layer measuring and adjusting water distributor 13, and the ball-throwing type check valve 15 is arranged below the constant pressure water distributor 14.
Wherein, the lower part of the ball throwing type check valve 15 is connected with a sieve tube 16, and a plug 17 is arranged below the sieve tube 16; the upper acidification valve 8 is charged with an upper soluble ball 8.1, and the middle acidification valve 11 is charged with a middle soluble ball 11.3, wherein the diameter of the upper soluble ball 8.1 is larger than that of the middle soluble ball 11.3.
Preferably, the intermediate acidification valve 11 comprises an acidification valve body 11.1 and an inner sliding sleeve 11.2, the upper part of the acidification valve body 11.1 is of a conical structure, and the inner sliding sleeve 11.2 is arranged at the central bottom of the acidification valve body 11.1.
Preferably, the conical structure of the upper part of the acidification valve body 11.1 realizes the plugging fit by putting the medium soluble ball 11.3 into the acidification valve body.
The working process of the utility model is as follows:
(1) acid leaching of a shaft: the three measuring and regulating water distributors of the upper layer, the middle layer and the lower layer are fully closed; before the ball-throwing type well-flushing valve is thrown, acid liquor is replaced into the whole oil layer part of the oil sleeve annulus from the bottom sieve tube 16 in the oil pipe, and the shaft and the near wellbore zone are uniformly soaked in the whole well section;
(2) setting: when the ball is placed in the ball-throwing type check valve 15, the ball is stepped and pressed from the inside of the oil pipe to the designed pressure of the packer, and the packers at the upper part, the middle part and the lower layer complete setting at one time;
(3) and (3) acidification of a lower oil layer: continuously pressurizing from the oil pipe, after the constant-pressure water distributor 14 is opened, injecting acid liquor with the designed amount from the oil pipe, enabling the acid liquor to flow through the constant-pressure water distributor 14 and enter the lower oil layer 5, and carrying out lower-layer acidification;
(4) acidification of the medium oil layer: throwing a soluble ball into the middle-layer acidification valve 11, pressing, removing the inner sliding sleeve of the middle-layer acidification valve 11, and opening the pickling valve; meanwhile, the sliding sleeve descends to the inner part of the constant-pressure water distributor 14 to seal the lower layer, and the oil layer 4 is independently centered for acidizing operation; after the acidification operation of the middle oil layer 4 is stopped, the middle acidification valve 11 automatically closes the outlet under the pressure of the spring;
(5) acidification of an upper oil layer: putting a soluble ball into the upper-layer acidification valve 8, pressing, starting an upper-layer acidification tool, and carrying out upper-layer acidification; after the upper-layer acidification operation is stopped, the upper-layer acidification valve 8 automatically closes the outlet under the pressure of the spring;
(6) water injection by layers: after the soluble ball is melted, a testing and adjusting instrument is put in, and the outlet of the upper, middle and lower three-layer testing and adjusting integrated water distributor is opened according to the design to realize layered water injection.
The above description is only a preferred embodiment of the present invention, and any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the technical solutions described above. Therefore, any simple modifications or equivalent replacements made according to the technical solution of the present invention belong to the scope of the claimed invention as far as possible.
Claims (5)
1. An acid leaching layered acidification layered water injection integrated pipe column is characterized in that a process pipe column is arranged in a casing (1) through an oil pipe (2): the process pipe column mainly comprises a top packer (6), an upper layer measuring and adjusting water distributor (7), an upper layer acidizing valve (8), a middle packer (9), a middle measuring and adjusting water distributor (10), a middle acidizing valve (11), a lower layer packer (12), a lower layer measuring and adjusting water distributor (13), a constant pressure water distributor (14), a ball throwing type check valve (15), a sieve pipe (16) and a plug (17), wherein the top packer (6), the middle packer (9) and the lower layer packer (12) divide an annular space between an oil pipe (2) and a casing pipe (1) into an upper oil layer (3), a middle oil layer (4) and a lower oil layer (5), the upper layer measuring and adjusting water distributor (7) and the upper layer acidizing valve (8) are arranged between the top packer (6) and the middle packer (9), the middle measuring and adjusting water distributor (10) and the middle acidizing valve (11) are arranged between the middle packer (9) and the lower layer packer (12), the lower portion of the lower packer (12) is provided with a lower layer testing and adjusting water distributor (13), a constant pressure water distributor (14) and a ball throwing type check valve (15), the constant pressure water distributor (14) is arranged below the lower layer testing and adjusting water distributor (13), and the ball throwing type check valve (15) is arranged below the constant pressure water distributor (14).
2. The integrated tubular column for acid leaching, layered acidification and layered water injection according to claim 1, which is characterized in that: the lower part of the ball-throwing type check valve (15) is connected with a sieve tube (16), and a plug (17) is arranged below the sieve tube (16).
3. The integrated tubular column for acid leaching, layered acidification and layered water injection according to claim 1, which is characterized in that: the upper layer acidification valve (8) is thrown into an upper soluble ball, and a middle soluble ball (11.3) is thrown into the middle acidification valve (11), and the diameter of the upper soluble ball is larger than that of the middle soluble ball.
4. The integrated tubular column for acid leaching, layered acidification and layered water injection according to claim 1, which is characterized in that: the middle acidification valve (11) comprises an acidification valve body (11.1) and an inner sliding sleeve (11.2), the upper part of the acidification valve body (11.1) is of a conical structure, and the inner sliding sleeve (11.2) is arranged at the bottom of the center of the acidification valve body (11.1).
5. The integrated tubular column for acid leaching, layered acidification and layered water injection according to claim 4, which is characterized in that: the conical structure of the upper part of the acidification valve body (11.1) realizes plugging matching by putting the medium soluble ball (11.3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022309628.3U CN213597938U (en) | 2020-10-16 | 2020-10-16 | Acid leaching layered acidification layered water injection integrated tubular column |
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|---|---|---|---|
| CN202022309628.3U CN213597938U (en) | 2020-10-16 | 2020-10-16 | Acid leaching layered acidification layered water injection integrated tubular column |
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| CN213597938U true CN213597938U (en) | 2021-07-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023000169A1 (en) * | 2021-07-20 | 2023-01-26 | 北京合力奇点科技有限公司 | Flow-regulating water-controlling and acidification well-completion device for oil-gas well and use method |
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2020
- 2020-10-16 CN CN202022309628.3U patent/CN213597938U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023000169A1 (en) * | 2021-07-20 | 2023-01-26 | 北京合力奇点科技有限公司 | Flow-regulating water-controlling and acidification well-completion device for oil-gas well and use method |
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