CN114991722B - Method for judging position of screen pipe damage point of horizontal well by reverse circulation sand washing - Google Patents
Method for judging position of screen pipe damage point of horizontal well by reverse circulation sand washing Download PDFInfo
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- CN114991722B CN114991722B CN202210462649.XA CN202210462649A CN114991722B CN 114991722 B CN114991722 B CN 114991722B CN 202210462649 A CN202210462649 A CN 202210462649A CN 114991722 B CN114991722 B CN 114991722B
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- 239000004576 sand Substances 0.000 title claims abstract description 136
- 238000005406 washing Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000011010 flushing procedure Methods 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims description 20
- 239000007787 solid Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 8
- 238000010992 reflux Methods 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 4
- 238000009825 accumulation Methods 0.000 claims description 3
- 239000007858 starting material Substances 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 239000003129 oil well Substances 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 2
- 238000010297 mechanical methods and process Methods 0.000 abstract 1
- 230000005226 mechanical processes and functions Effects 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 241000519995 Stachys sylvatica Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Geophysics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention provides a method for judging the position of a broken point of a screen pipe of a horizontal well by reverse circulation sand washing, which uses a forward and reverse circulation sand washing process to wash sand to the position of a packer; the method comprises the steps of flushing sand in a packer and a blind pipe to determine total length of the packer and the blind pipe, metering total length sand quantity in the packer and the blind pipe by using a reverse circulation sand flushing method in the packer and the blind pipe, and calculating average stacking sand quantity of the blind pipe in unit length; continuously reversely circulating sand washing inside the screen pipe, continuously downwards detecting the depth of the single oil pipe, continuously observing the sand returning quantity and the grain diameter of the single oil pipe, and marking the depth position as the screen pipe leakage point position when the sand returning quantity of the single oil pipe is zero or close to zero; and continuing to lower the tool until the position of the sand setting packer at the bottom of the well is smoothly lower, no resistance exists, no gravel is returned in the whole process, and the sand washing operation is finished. The method fills the technical blank of the mechanical process method for finding the leakage point and finding the water of the horizontal well of the oil well, and simultaneously provides data support for the overhaul operations of the horizontal well such as fixed-point water shutoff, ACP chemical shutoff and the like of the horizontal well of the oil field.
Description
Technical Field
The invention relates to the technical field of petroleum engineering, in particular to a method for judging the position of a broken point of a screen pipe of a horizontal well by reverse circulation sand washing.
Background
The horizontal well is an efficient well drilling and completion method for oil well development, but a plurality of problems such as damage, sand production and the like occur in the production process of many horizontal oil wells at present. According to incomplete statistics, the number of horizontal wells which are stopped after sand production and water production in China is nearly hundreds of (land oil fields and offshore oil fields) per year. However, due to the fact that the conventional techniques and methods for judging the leakage points of the horizontal well have high requirements, high risk, high cost and the like for well conditions, the horizontal well screen pipe breakage leakage finding and water finding process is always applied in a small range until the later stages of multiple horizontal well repairing processes such as ACP plugging, artificial well wall sand prevention, water plugging and the like are still in the blind plugging and blind plugging stages; the subsequent water control and sand prevention restoration effects and process evaluation of the horizontal well are seriously affected.
Disclosure of Invention
The invention overcomes the defects in the prior art and provides a method for judging the position of the breakage point of the screen pipe of the horizontal well by reverse circulation sand washing. The method provides data support for horizontal well repairing processes such as fixed-point water shutoff, ACP chemical shutoff and the like of the horizontal well; the sand bed particles obtained in a segmented way can provide basis for stratum skeleton components and oil reservoir seepage characteristics.
The aim of the invention is achieved by the following technical scheme.
The method for judging the position of the breakage point of the screen pipe of the horizontal well by reverse circulation sand washing is carried out according to the following steps:
step 1, sand is washed to the position of a packer by utilizing a conventional positive and negative circulation sand washing process so as to ensure that the position above the packer is washed cleanly, and the quality and the particle size characteristics of the sand are observed preliminarily;
step 2, sand washing is carried out in the packer and the blind pipe to determine the total length of the packer and the blind pipe, a reverse circulation sand washing method is utilized in the packer and the blind pipe, the total length sand quantity in the packer and the blind pipe is measured, the average sand accumulation quantity of the blind pipe in unit length is calculated, and main data are obtained in the step: (1) the total internal length of the packer and the blind pipe; (2) the total sand amount inside the packer and the blind pipe; (3) blind pipe average value of unit length; (4) collecting the grain diameter range: the width of the screen pipe gap;
step 3, screen pipe internal reverse circulation sand washing, single oil pipe length reverse circulation sand washing metering method, this step mainly operates the main collar: (1) sand washing in the sieve tube slowly and continuously reversely circularly washes sand, and calculating sand amount; (2) continuously flushing sand in the process of lifting an oil pipe; (3) repeating the operation (1) once; (4) collecting the returned solid particles; (5) after the single operation is finished, carrying out sand quantity and particle parameter comparison; (6) performing sand washing operation on the second oil pipe;
step 4, continuously reversely circulating sand washing inside the sieve tube, continuously exploring the depth of the single oil tube according to the method of the step 3, continuously observing the sand returning quantity and the particle size of the single oil tube, and marking the depth position when the sand returning quantity of the single oil tube is zero or close to zero;
step 5, the depth position marked in the step 4 is the position of the leakage point of the sieve tube, and the depth range of the position of the leakage point is further determined;
and 6, continuing to lower the tool until the position of the sand setting packer at the bottom of the well is smoothly detected, no resistance exists, no gravel is returned in the whole process, the sand washing operation is finished, and the construction operation of the screen pipe breakage point judging method is finished.
The horizontal well pipe column structure for judging the breakage point position of the horizontal well screen pipe comprises a reverse circulation joint, an annular blowout preventer, an annular liquid inlet, an oil pipe, a packer and a sand flushing combination tool, wherein the reverse circulation joint is installed at the head end of the oil pipe, the annular blowout preventer is arranged between the outer wall of the oil pipe and the inner wall of a shaft, the annular liquid inlet is arranged on the side wall of the shaft below the annular blowout preventer, the packer is arranged between the outer wall of the oil pipe and the inner wall of the shaft, the packer is located at the starting end of the underground horizontal position, and the sand flushing combination tool is installed at the tail end of the oil pipe.
The sand washing combination tool comprises a spiral sand cleaner, a primary reflux device and a sand breaking and starting device, wherein the tail end of an oil pipe is connected with the head end of the spiral sand cleaner, the tail end of the spiral sand cleaner is connected with the head end of the sand breaking and starting device through the primary reflux device, and solid particles (filled sand and stratum gravel) deposited in a shaft can be broken by the sand washing combination tool, so that the purpose of circulating the sand washing combination tool from a single oil pipe to the outside of a well by using reverse circulation sand washing is achieved.
The beneficial effects of the invention are as follows: in the long-term development process of the oilfield horizontal well, a part of the horizontal well is damaged and leaked due to erosion and abrasion, so that filling sand and stratum sand flow out along with stratum fluid from the leaked position, and a sand bed deposition characteristic extending from the damaged point to the root part is formed. The process method can judge the approximate position of the breakage point of the screen pipe of the horizontal well, thereby providing reliable basis for later water finding and water plugging of the horizontal well and sand sample analysis basis for erosion and damage of an oil reservoir framework. Thereby maintaining the long-term low-water-content liquid production target of the open-hole horizontal well, prolonging the service life of the oil well, improving the comprehensive oil yield of the horizontal well and improving the comprehensive recovery ratio of the oil reservoir.
Drawings
FIG. 1 is a flow chart of a construction method of the present invention;
FIG. 2 is a schematic view of a sand washing combination tool used in the present invention;
FIG. 3 is a schematic structural view of a hardness breaking sand opener according to the present invention, wherein a is a side view, and b is a sectional view;
FIG. 4 is a schematic view of a primary reflux unit according to the present invention, wherein a is a side view and b is a cross-sectional view;
FIG. 5 is a schematic structural view of a spiral sand cleaner according to the present invention, wherein a is a side view and b is a sectional view;
FIG. 6 is a circled position of a broken leak point, i.e. a graph, of an erosive wear occurring somewhere in a horizontal well in an oilfield;
FIG. 7 is a process diagram of a broken leak to a wellbore root location that may develop sand mound buildup;
in all the following figures: 1 is a reverse circulation joint; 2 is an annular blowout preventer; 3 is an annular liquid inlet; 4 is an oil pipe; 5 is a packer; 6 is a sand washing combined tool, 7 is a spiral sand cleaner, 8 is a primary reflux device, and 9 is a hardness breaking sand opener.
Detailed Description
The technical scheme of the invention is further described by specific examples.
The method for judging the position of the breakage point of the screen pipe of the horizontal well by reverse circulation sand washing is carried out according to the following steps:
step 1, sand is washed to the position of a packer by utilizing a conventional positive and negative circulation sand washing process so as to ensure that the position above the packer is washed cleanly, and the quality and the particle size characteristics of the sand are observed preliminarily;
step 2, flushing sand in the packer and the blind pipe to determine the total length of the packer and the blind pipe (wherein the well deviation of the horizontal well is within the range of 88-92 degrees), metering the total length sand quantity in the packer and the blind pipe by using a reverse circulation sand flushing method, and calculating the average stacking sand quantity (sand quantity/10 m) of the blind pipe in unit length, wherein main data are obtained in the step: (1) the total internal length of the packer and the blind pipe; (2) the total sand amount inside the packer and the blind pipe; (3) blind pipe average value of unit length; (4) collecting the grain diameter range: the range of gravel diameters requires > screen gap width (e.g., 80 mesh screen, collected sand size greater than 0.32 mm);
step 3, screen pipe internal reverse circulation sand washing, single oil pipe (wherein, single oil pipe is equal to about 10 meters) length reverse circulation sand washing metering method, this step is mainly operated and is required: (1) sand washing in the sieve tube slowly and continuously reversely circularly washes sand, and calculating sand amount; (2) continuously flushing sand in the process of lifting an oil pipe; (3) repeating the operation (1) once; (4) collecting the returned solid particles; (5) after the single operation is finished, carrying out sand quantity and particle parameter comparison; (6) performing sand washing operation on the second oil pipe;
step 4, continuously reversely circulating sand washing inside the sieve tube, continuously exploring the depth of the single oil tube according to the method of the step 3, continuously observing the sand returning quantity and the particle size of the single oil tube, and marking the depth position when the sand returning quantity of the single oil tube is zero or close to zero;
step 5, the depth position marked in the step 4 is the position of the leakage point of the sieve tube, and the depth range of the position of the leakage point is further determined;
and 6, continuing to lower the tool until the position of the sand setting packer at the bottom of the well is smoothly detected, no resistance exists, no gravel is returned in the whole process, the sand washing operation is finished, and the construction operation of the screen pipe breakage point judging method is finished.
The main pipe column structure schematic diagram of the horizontal well shaft of the horizontal well screen pipe damage point position judging method comprises a reverse circulation joint 1, an annular blowout preventer 2, an annular liquid inlet 3, an oil pipe 4, a packer 5 and a sand flushing combination tool 6, wherein the reverse circulation joint 1 is arranged at the head end of the oil pipe 4, the annular blowout preventer 2 is arranged between the outer wall of the oil pipe 4 and the inner wall of the shaft, the annular liquid inlet 3 is arranged on the side wall of the shaft below the annular blowout preventer 2, the packer 5 is arranged between the outer wall of the oil pipe 4 and the inner wall of the shaft, the packer 5 is positioned at the starting end of the underground horizontal position, and the sand flushing combination tool 6 is arranged at the tail end of the oil pipe 4.
The sand washing combination tool 6 comprises a spiral sand cleaner 7, a primary reflux device 8 and a sand breaking and starting device 9, the tail end of the oil pipe 4 is connected with the head end of the spiral sand cleaner 7, the tail end of the spiral sand cleaner 7 is connected with the head end of the sand breaking and starting device 9 through the primary reflux device 8, and solid particles (filled sand and stratum gravel) deposited in a shaft can be broken by the sand washing combination tool, so that the purpose of circulating the solid particles out of the well from a single oil pipe by reverse circulation sand washing is achieved.
Judging the technological mechanism of the position of the damaged point: the fluid flow rule in the horizontal well shaft is always a unidirectional flow rule from the toe end direction to the heel end direction. After solid particles (filled sand and stratum gravel) enter the screen pipe from the outside of the screen pipe, the solid particles naturally settle due to comprehensive factors such as viscosity, flow rate, density and the like, sand mound accumulation phenomenon gradually forms from the position of a leakage point to the position of the root of a shaft, as oil well development and exploitation continue, fluid from the leakage point formed inside the sand control screen pipe (shown as white spots circled in fig. 6) gradually forms a sediment sand bed towards the heel of the oil well, as shown in fig. 7, arrows represent the fluid flowing direction, and the fluid flows from the toe end to the heel. And in the process of depositing the sand bed, the solid particle deposition process is carried out in a layer-by-layer lamination state, and the solid particle size is gradually layered from the toe part to the root part to form a segmented formation state.
The foregoing has described exemplary embodiments of the invention, it being understood that any simple variations, modifications, or other equivalent arrangements which would not unduly obscure the invention may be made by those skilled in the art without departing from the spirit of the invention.
Claims (1)
1. A method for judging positions of breakage points of screen pipes of a horizontal well by reverse circulation sand washing is characterized by comprising the following steps: the method comprises the following steps of:
step 1, sand is washed to the position of a packer by utilizing a conventional positive and negative circulation sand washing process so as to ensure that the position above the packer is washed cleanly, and the quality and the particle size characteristics of the sand are observed preliminarily;
step 2, sand washing is carried out in the packer and the blind pipe to determine the total length of the packer and the blind pipe, a reverse circulation sand washing method is utilized in the packer and the blind pipe, the total length sand quantity in the packer and the blind pipe is measured, the average sand accumulation quantity of the blind pipe in unit length is calculated, and main data are obtained in the step:the total internal length of the packer and the blind pipe; />The total sand amount inside the packer and the blind pipe; />Blind pipe average value of unit length; />Collecting the grain size of sandThe range is larger than the width of the screen pipe gap;
step 3, screen pipe internal reverse circulation sand washing, single oil pipe length reverse circulation sand washing metering method, this step mainly operates the main collar:sand washing in the sieve tube slowly and continuously reversely circularly washes sand, and calculating sand amount; />Continuously flushing sand in the process of lifting an oil pipe; />RepeatingPerforming operation once; />Collecting the returned solid particles; />After the single operation is finished, carrying out sand quantity and particle parameter comparison; />Performing sand washing operation on the second oil pipe;
step 4, continuously reversely circulating sand washing inside the sieve tube, continuously exploring the depth of the single oil tube according to the method of the step 3, continuously observing the return sand amount and the particle size of the single oil tube, and marking the depth position when the return sand amount of the single oil tube is zero;
step 5, the depth position marked in the step 4 is the position of the leakage point of the sieve tube, and the depth range of the position of the leakage point is further determined;
step 6, continuing to lower the tool until the position of the sand setting packer at the bottom of the well is smoothly detected, no resistance exists, no gravel is returned in the whole process, the sand washing operation is finished, and the construction operation of the screen pipe breakage point judging method is finished;
the horizontal well pipe column structure for judging the breakage point position of the horizontal well screen pipe comprises a reverse circulation joint, an annular blowout preventer, an annular liquid inlet, an oil pipe, a packer and a sand flushing combination tool, wherein the reverse circulation joint is arranged at the head end of the oil pipe, the annular blowout preventer is arranged between the outer wall of the oil pipe and the inner wall of a shaft, the annular liquid inlet is arranged on the side wall of the shaft below the annular blowout preventer, the packer is arranged between the outer wall of the oil pipe and the inner wall of the shaft, the packer is positioned at the starting end of the underground horizontal position, and the sand flushing combination tool is arranged at the tail end of the oil pipe;
the sand washing combination tool comprises a spiral sand cleaner, a primary reflux device and a hardness breaking sand starter, wherein the tail end of the oil pipe is connected with the head end of the spiral sand cleaner, and the tail end of the spiral sand cleaner is connected with the head end of the hardness breaking sand starter through the primary reflux device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210462649.XA CN114991722B (en) | 2022-04-28 | 2022-04-28 | Method for judging position of screen pipe damage point of horizontal well by reverse circulation sand washing |
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| CN202210462649.XA CN114991722B (en) | 2022-04-28 | 2022-04-28 | Method for judging position of screen pipe damage point of horizontal well by reverse circulation sand washing |
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| CN114991722B true CN114991722B (en) | 2023-07-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2003260217A1 (en) * | 2002-07-19 | 2004-02-09 | Presssol Ltd. | Reverse circulation clean out system for low pressure gas wells |
| US8245770B2 (en) * | 2008-12-01 | 2012-08-21 | Geodynamics, Inc. | Method for perforating failure-prone formations |
| CN103573200B (en) * | 2012-07-24 | 2016-09-14 | 中国海洋石油总公司 | A kind of technology for washing well and equipment thereof |
| CN204941396U (en) * | 2015-08-19 | 2016-01-06 | 中国石油天然气股份有限公司 | Reverse circulation rotational flow scraping type sand washing device for horizontal well |
| CN105804679B (en) * | 2016-02-06 | 2018-05-08 | 高伟时 | Continuously circulating water horizontal well wellbore treatments process pipe string device is realized using plain tubing |
| CN108442916B (en) * | 2017-02-10 | 2023-07-11 | 中国石油化工股份有限公司 | Open hole screen pipe damage detection tubular column for horizontal well |
| CN110857623A (en) * | 2018-08-21 | 2020-03-03 | 中国石油化工股份有限公司 | Continuous sand washing type sand production detection system and method |
| US11118431B2 (en) * | 2018-11-28 | 2021-09-14 | Chevron U.S.A. Inc. | Smart sand control service tool positioning |
| CN111005693A (en) * | 2019-12-26 | 2020-04-14 | 巢晟(天津)石油科技有限公司 | Underground rotational flow blockage removing tool |
| US11846174B2 (en) * | 2020-02-01 | 2023-12-19 | Halliburton Energy Services, Inc. | Loss circulation detection during cementing operations |
| CN111878069A (en) * | 2020-08-04 | 2020-11-03 | 华信唐山石油装备有限公司 | Composite continuous pipe cable oil-water well casing leakage finding system and method |
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