CN112943193A - Preparation and injection integrated acidizing plug removal process - Google Patents
Preparation and injection integrated acidizing plug removal process Download PDFInfo
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- CN112943193A CN112943193A CN202110293846.9A CN202110293846A CN112943193A CN 112943193 A CN112943193 A CN 112943193A CN 202110293846 A CN202110293846 A CN 202110293846A CN 112943193 A CN112943193 A CN 112943193A
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- lifter
- stage
- electric valve
- metering
- acid
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- 238000002347 injection Methods 0.000 title claims abstract description 22
- 239000007924 injection Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 53
- 239000002253 acid Substances 0.000 claims abstract description 49
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 20
- 230000010354 integration Effects 0.000 claims abstract description 20
- 238000010276 construction Methods 0.000 claims abstract description 18
- 238000006073 displacement reaction Methods 0.000 claims abstract description 17
- 230000020477 pH reduction Effects 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000003814 drug Substances 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000000605 extraction Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
Images
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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/066—Valve arrangements for boreholes or wells in wells electrically actuated
-
- 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
-
- 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
- E21B47/06—Measuring temperature or pressure
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Accessories For Mixers (AREA)
Abstract
The invention relates to the technical field of oil extraction in oil fields, and belongs to a preparation and injection integrated acidizing and plug removal process. The method mainly solves the problems that acid liquor is prepared on site and transported to the site for construction in the conventional acidification blockage removal measures, the acid liquor is completely injected in the construction process, the pressure drop does not meet the construction requirement, or the pressure drop meets the construction requirement, and the acid liquor is remained. The invention is composed of an electric appliance control integration box (1), a storage room (2), a first-stage metering lifter (3), a second-stage metering lifter (4), a first-stage bidirectional electric valve (5), a flowmeter (6), a closed mixer (7), a variable-displacement high-pressure acid-resistant plunger pump (8), an anti-seismic pressure gauge (9), a three-way electric valve (10), a vent hole (11), a one-way valve (12), a flowmeter (13), a second-stage bidirectional electric valve (14) and a liquid suction pump (15), and can realize the integration of acid liquid preparation and injection in an acidification and blockage removal construction site, the acid liquid amount is prepared according to the pressure drop condition of site construction, and the situations of insufficient or residual acid liquid amount in site construction are avoided.
Description
Technical Field
The invention relates to the technical field of oil extraction in oil fields, and belongs to a preparation and injection integrated acidizing and plug removal process.
Background
The acidification plug removal is an effective technical means for removing the plug of the near-wellbore area of the oil-water well and improving the extraction or injection capacity of a single well, the acidification plug removal process used in the acidification plug removal process is to formulate a specific formula according to the plug type of a measure well, prepare acid liquor according to the formula at a liquor preparation station, and carry the acid liquor to a well site by a tank truck for construction, wherein the following two conditions often occur in the construction process: firstly, acid liquor transported to the site by pulling is completely injected, but the pressure drop amplitude is not large, an ideal blockage removing effect is not achieved, and the problem of insufficient acid liquor is caused; and secondly, part of the acid liquid is injected, the pressure drop amplitude is large, the expected blockage removing effect is achieved, and the acid liquid is left.
Disclosure of Invention
The invention provides a preparation and injection integrated acidification plug removal process, which can be used for preparing and injecting acid liquor on site, wherein the amount of the acid liquor is prepared according to the pressure drop condition of site construction as required, so that the situation that the acid liquor is prepared on site after conventional process and the acid liquor is insufficient or residual in site construction is avoided.
The technical scheme of the invention is as follows: a preparation and injection integrated acidification blockage removal process is realized by the following devices: a preparation and injection integrated acidification plug removal device comprises an electric appliance control integration box, a storage room, a first-stage metering lifter, a second-stage metering lifter, a first-stage bidirectional electric valve, a flowmeter, a closed mixer, a variable-displacement high-pressure acid-resistant plunger pump, an anti-seismic pressure gauge, a three-way electric valve, a vent, a one-way valve, a flowmeter, a second-stage bidirectional electric valve and a liquid suction pump; the electric appliance control integration box is respectively connected with two metering lifters, two bidirectional electric valves, two flowmeters, a closed mixer, a variable-displacement high-pressure acid-resistant plunger pump, an anti-seismic pressure gauge, a three-way electric valve and a liquid suction pump through cables, a storage room is connected with the closed mixer through the two metering lifters, one side of the closed mixer is connected with a first-stage bidirectional electric valve, a flowmeter and a variable-displacement high-pressure acid-resistant plunger pump through pipelines, the other side of the closed mixer is connected with the flowmeter, a second-stage bidirectional electric valve and the liquid suction pump through pipelines, the variable-displacement high-pressure acid-resistant plunger pump is connected with the anti-seismic pressure gauge and the three-way electric valve through pipelines; the preparation and injection integrated acidizing plug removal process utilizing the device comprises the following steps:
a. respectively adding the main agent of the acidizing fluid and the comprehensive additive into different storage rooms of a storage room, transporting the device to the site, and preparing and injecting the acidizing fluid into the integrated device through a high-pressure hose line to be connected with the wellhead of the measure well;
b. connecting the inlet end of the liquid suction pump with the water outlet of the water tank truck through a hose line;
c. starting a main power switch of the electric appliance control integration box, and setting the feeding proportion of the primary metering lifter, the secondary metering lifter and the liquid suction pump according to the specific condition of the measure well;
d. opening a first-stage two-way electric valve and a second-stage two-way electric valve, and opening a three-way electric valve to connect the anti-seismic pressure gauge and a switch in the direction of the one-way valve;
e. starting the first-stage metering lifter, the second-stage metering lifter and the liquid suction pump, conveying the medicament and the water into the closed mixer, and starting the closed mixer to uniformly mix the medicament and the water;
f. opening a gate of a measure well, starting a variable-displacement high-pressure acid-resistant plunger pump, and injecting the prepared acid liquid into the measure well according to the pressure and the speed set by the electric appliance control integration box;
g. the electric appliance control integration box 1 can automatically increase or decrease the feeding speeds of the first-stage metering lifter, the second-stage metering lifter and the liquid suction pump according to the on-site acid liquid injection speed in proportion, so as to ensure that the liquid amount in the closed mixer is sufficient;
h. when the residual liquid amount in the closed mixer is monitored to be less, the liquid suction pump is automatically started, a certain amount of clean water is injected into the closed mixer, not only is the part in the closed mixer contacted with acid liquid cleaned, but also the acid liquid in a shaft is completely squeezed into the stratum, so that corrosion is prevented;
i. after the clear water is injected, closing the well mouth gate of the measure well, stopping the liquid suction pump, closing the first-stage two-way electric valve and the second-stage two-way electric valve, closing the switch of connecting the three-way electric valve with the anti-seismic pressure gauge and the one-way valve, opening the switch of connecting the three-way electric valve with the vent direction, releasing the pressure in the pipeline, then dismantling the pipeline, and finishing the construction.
The invention has the following beneficial effects:
the preparation and injection integrated acidification de-plugging process is adopted, the acid liquor can be prepared and injected on site, the acid liquor amount is prepared according to the pressure drop condition of site construction according to the requirement, and the situation that the acid liquor amount is insufficient or residual in site construction due to the conventional post-site acid liquor preparation is avoided.
Description of the drawings: FIG. 1 is a schematic view of the dosing process of the present invention.
In the figure 1-an electric appliance control integration box; 2-a storage room; 3-a first-stage metering lifter; 4-a two-stage metering lifter; 5-a first-stage bidirectional electric valve; 6-a flow meter; 7-a closed mixer; 8-variable displacement high-pressure acid-resistant plunger pump; 9-anti-seismic pressure gauge; 10-three-way electric valve; 11-a vent; 12-a one-way valve; 13-a flow meter; 14-two-stage two-way electric valve; 15-liquid suction pump.
The specific implementation mode is as follows: the invention will be further described with reference to the accompanying drawings in which: a preparation and injection integrated acidification blockage removal process is realized by the following devices: a preparation and injection integrated acidification plug removal device is composed of an electric appliance control integration box 1, a storage room 2, a first-stage metering lifter 3, a second-stage metering lifter 4, a first-stage bidirectional electric valve 5, a flowmeter 6, a closed mixer 7, a variable-displacement high-pressure acid-resistant plunger pump 8, an anti-seismic pressure gauge 9, a three-way electric valve 10, a vent 11, a one-way valve 12, a flowmeter 13, a second-stage bidirectional electric valve 14 and a liquid suction pump 15; wherein the electric appliance control integration box 1 is respectively connected with a first-stage metering lifter 3, a second-stage metering lifter 4, a first-stage bidirectional electric valve 5, a flowmeter 6, a closed mixer 7, a variable-displacement high-pressure acid-resistant plunger pump 8, an anti-seismic pressure gauge 9, a three-way electric valve 10, a flowmeter 13, a second-stage bidirectional electric valve 14 and a liquid suction pump 15 through cables, the storage room 2 is connected with the closed mixer 7 through the first-stage metering lifter 3 and the second-stage metering lifter 4, one side of the closed mixer 7 is connected with the first-stage bidirectional electric valve 5, the flowmeter 6 and the variable-displacement high-pressure acid-resistant plunger pump 8 through pipelines, the other side of the closed mixer 7 is connected with the flowmeter 13, the second-stage bidirectional electric valve 14 and the liquid suction pump 15 through pipelines, the variable-displacement high-pressure acid-resistant plunger pump 8 is connected with, The one-way valve 12 is connected; the preparation and injection integrated acidizing plug removal process utilizing the device comprises the following steps:
a. respectively adding the main agent of the acidizing fluid and the comprehensive additive into different storage rooms of the storage room 2, transporting the device to the site, and preparing and injecting the acidizing fluid into the integrated device through a high-pressure hose line to be connected with the wellhead of the measure well;
b. the inlet end of the liquid suction pump 15 is connected with the water outlet of the water tank truck through a hose line;
c. starting a main power switch of the electric appliance control integration box 1, and setting the charging proportion of the first-stage metering lifter 3, the second-stage metering lifter 4 and the liquid suction pump 15 according to the specific conditions of the measure well;
d. opening a first-stage two-way electric valve 5 and a second-stage two-way electric valve 14, and opening a three-way electric valve 10 to connect the anti-seismic pressure gauge 9 and a switch in the direction of a one-way valve 12;
e. starting the first-stage metering lifter 3, the second-stage metering lifter 4 and the liquid suction pump 15, conveying the medicament and the water into the closed mixer 7, and simultaneously starting the closed mixer 7 to uniformly mix the medicament and the water;
f. opening a gate of a measure well, starting a variable-displacement high-pressure acid-resistant plunger pump 8, and injecting the prepared acid liquid into the measure well according to the pressure and the speed set by the electric appliance control integration box 1;
g. the electric appliance control integration box 1 can automatically increase or decrease the feeding speeds of the first-stage metering lifter 3, the second-stage metering lifter 4 and the liquid suction pump 15 according to the on-site acid liquid injection speed in proportion to ensure that the liquid amount in the closed mixer 7 is sufficient;
h. when the electric appliance control integration box 1 monitors that the injection pressure drop amplitude in the construction process reaches the design requirement through a connected anti-seismic pressure gauge 9, the primary metering lifter 3, the secondary metering lifter 4 and the liquid suction pump 15 are automatically stopped, when the liquid amount in the closed mixer 7 is monitored to be less, the liquid suction pump 15 is automatically started, a certain amount of clean water is injected into the closed mixer 7, the part of the device contacting acid liquid is cleaned, and the acid liquid in a shaft is completely squeezed into the stratum to prevent corrosion;
i. after the clear water is injected, closing a well mouth gate of the measure well, stopping a liquid suction pump 15, closing the first-stage two-way electric valve 5 and the second-stage two-way electric valve 14, closing the switch of the three-way electric valve 10 in the direction of connecting the anti-seismic pressure gauge 9 and the one-way valve 12, opening the switch of the three-way electric valve 10 in the direction of connecting the emptying port 11, releasing the pressure in the pipeline, then dismantling the pipeline, and finishing the construction.
Claims (1)
1. A preparation and injection integrated acidification blockage removal process is realized by the following devices: a preparation and injection integrated acidification plug removal device consists of an electric appliance control integration box (1), a storage room (2), a primary metering lifter (3), a secondary metering lifter (4), a primary bidirectional electric valve (5), a flowmeter (6), a closed mixer (7), a variable-displacement high-pressure acid-resistant plunger pump (8), an anti-seismic pressure gauge (9), a three-way electric valve (10), a vent (11), a one-way valve (12), a flowmeter (13), a secondary bidirectional electric valve (14) and a liquid suction pump (15); wherein the electric appliance control integration box (1) is respectively connected with a first-stage metering lifter (3), a second-stage metering lifter (4), a first-stage bidirectional electric valve (5), a flowmeter (6), a closed mixer (7), a variable-displacement high-pressure acid-resistant plunger pump (8), an anti-seismic pressure gauge (9), a three-way electric valve (10), a flowmeter (13), a second-stage bidirectional electric valve (14) and a liquid suction pump (15) through cables, the storage room (2) is connected with the closed mixer (7) through the first-stage metering lifter (3) and the second-stage metering lifter (4), one side of the closed mixer (7) is connected with the first-stage bidirectional electric valve (5), the flowmeter (6) and the variable-displacement high-pressure acid-resistant plunger pump (8) through pipelines, the other side of the closed mixer (7) is connected with the flowmeter (13), the second-stage bidirectional, the variable-displacement high-pressure acid-resistant plunger pump (8) is connected with the anti-seismic pressure gauge (9) and the three-way electric valve (10) through pipelines, and the three-way electric valve (10) is connected with the vent (11) and the check valve (12) through pipelines; the method is characterized in that: the preparation and injection integrated acidizing plug removal process utilizing the device comprises the following steps:
a. respectively adding the acidizing fluid main agent and the comprehensive additive into different storage rooms of the storage room (2), transporting the device to the site, and connecting the device with the wellhead of the measure well through a high-pressure hose line;
b. the inlet end of a liquid suction pump (15) is connected with the water outlet of the water tank truck through a hose line;
c. starting a main power switch of the electric appliance control integration box (1), and setting the charging proportion of the first-stage metering lifter (3), the second-stage metering lifter (4) and the liquid suction pump (15) according to the concrete condition of the measure well;
d. opening switches of the first-stage two-way electric valve (5) and the second-stage two-way electric valve (14), and opening a three-way electric valve (10) to connect the anti-seismic pressure gauge (9) and the one-way valve (12);
e. starting the first-stage metering lifter (3), the second-stage metering lifter (4) and the liquid suction pump (15), conveying the medicament and water into the closed mixer (7), and simultaneously starting the closed mixer (7) to uniformly mix the medicament and the water;
f. opening a gate of a measure well, starting a variable-displacement high-pressure acid-resistant plunger pump (8), and injecting the prepared acid liquid into the measure well according to the pressure and the speed set by the electric appliance control integration box (1);
g. the electric appliance control integration box (1) automatically increases and decreases the feeding speeds of the first-stage metering lifter (3), the second-stage metering lifter (4) and the liquid suction pump (15) according to the on-site acid liquid injection speed in proportion, so that the liquid amount in the closed mixer (7) is sufficient;
h. when the electric appliance control integration box (1) monitors that the injection pressure drop amplitude in the construction process reaches the design requirement through a connected anti-seismic pressure gauge (9), the primary metering lifter (3), the secondary metering lifter (4) and the liquid suction pump (15) are automatically stopped, and when the liquid amount in the closed mixer (7) is monitored to be less, the liquid suction pump (15) is automatically started to inject a certain amount of clean water into the closed mixer (7), so that not only can the part of the device contacting acid liquid be cleaned, but also the acid liquid in a shaft can be completely squeezed into the stratum to prevent corrosion;
i. after the clear water is injected, closing the well mouth gate of the measure well, stopping the liquid suction pump (15), closing the one-level two-way electric valve (5) and the two-level two-way electric valve (14), closing the switch of connecting the three-way electric valve (10) with the anti-seismic pressure gauge (9) and the one-way valve (12) in the direction, opening the switch of connecting the three-way electric valve (10) with the vent (11) in the direction, releasing the pressure in the pipeline, then dismantling the pipeline, and finishing the construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110293846.9A CN112943193A (en) | 2021-03-19 | 2021-03-19 | Preparation and injection integrated acidizing plug removal process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110293846.9A CN112943193A (en) | 2021-03-19 | 2021-03-19 | Preparation and injection integrated acidizing plug removal process |
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| Publication Number | Publication Date |
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| CN112943193A true CN112943193A (en) | 2021-06-11 |
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| CN202110293846.9A Pending CN112943193A (en) | 2021-03-19 | 2021-03-19 | Preparation and injection integrated acidizing plug removal process |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101298028A (en) * | 2008-01-10 | 2008-11-05 | 中国石化集团江汉石油管理局第四机械厂 | Mixed stirring device of acidizing substance |
| CN102828734A (en) * | 2012-09-13 | 2012-12-19 | 西南石油大学 | Offshore oilfield water injection well online one-step-process acidification technology |
| CN103726821A (en) * | 2014-01-08 | 2014-04-16 | 北京神州卓越石油科技有限公司 | Acid fracturing liquid continuous blending supply device |
| CN104196514A (en) * | 2014-09-02 | 2014-12-10 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Ready-to-use device for acid fracturing fluid |
| CN204646207U (en) * | 2015-05-19 | 2015-09-16 | 北京东晟世纪科技有限公司 | A kind of integrated acidification to dispel block application system that offshore oilfield is provided |
| CN107313762A (en) * | 2016-04-26 | 2017-11-03 | 中国石油化工股份有限公司 | A kind of shale hydraulic fracturing method |
| CN108716384A (en) * | 2018-04-24 | 2018-10-30 | 魏宇骞 | A kind of water injection well ackd salt antiscaling and descaling device |
| CN111502617A (en) * | 2020-03-25 | 2020-08-07 | 中国海洋石油集团有限公司 | Long-term online intelligent blockage removing system for water injection well |
-
2021
- 2021-03-19 CN CN202110293846.9A patent/CN112943193A/en active Pending
Patent Citations (8)
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|---|---|---|---|---|
| CN101298028A (en) * | 2008-01-10 | 2008-11-05 | 中国石化集团江汉石油管理局第四机械厂 | Mixed stirring device of acidizing substance |
| CN102828734A (en) * | 2012-09-13 | 2012-12-19 | 西南石油大学 | Offshore oilfield water injection well online one-step-process acidification technology |
| CN103726821A (en) * | 2014-01-08 | 2014-04-16 | 北京神州卓越石油科技有限公司 | Acid fracturing liquid continuous blending supply device |
| CN104196514A (en) * | 2014-09-02 | 2014-12-10 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Ready-to-use device for acid fracturing fluid |
| CN204646207U (en) * | 2015-05-19 | 2015-09-16 | 北京东晟世纪科技有限公司 | A kind of integrated acidification to dispel block application system that offshore oilfield is provided |
| CN107313762A (en) * | 2016-04-26 | 2017-11-03 | 中国石油化工股份有限公司 | A kind of shale hydraulic fracturing method |
| CN108716384A (en) * | 2018-04-24 | 2018-10-30 | 魏宇骞 | A kind of water injection well ackd salt antiscaling and descaling device |
| CN111502617A (en) * | 2020-03-25 | 2020-08-07 | 中国海洋石油集团有限公司 | Long-term online intelligent blockage removing system for water injection well |
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Application publication date: 20210611 |
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