CN111021977A - Method for quickly removing soluble bridge plug in case of blocking - Google Patents
Method for quickly removing soluble bridge plug in case of blocking Download PDFInfo
- Publication number
- CN111021977A CN111021977A CN201911155485.0A CN201911155485A CN111021977A CN 111021977 A CN111021977 A CN 111021977A CN 201911155485 A CN201911155485 A CN 201911155485A CN 111021977 A CN111021977 A CN 111021977A
- Authority
- CN
- China
- Prior art keywords
- bridge plug
- soluble
- slug
- well
- sand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 44
- 230000000903 blocking effect Effects 0.000 title claims description 18
- 239000007788 liquid Substances 0.000 claims abstract description 69
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000012530 fluid Substances 0.000 claims abstract description 18
- 238000005086 pumping Methods 0.000 claims abstract description 17
- 238000004090 dissolution Methods 0.000 claims description 41
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 claims description 36
- 239000000243 solution Substances 0.000 claims description 36
- 238000006073 displacement reaction Methods 0.000 claims description 28
- 238000002347 injection Methods 0.000 claims description 26
- 239000007924 injection Substances 0.000 claims description 26
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 23
- 239000004576 sand Substances 0.000 claims description 19
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 claims description 18
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 claims description 18
- 239000006004 Quartz sand Substances 0.000 claims description 12
- 239000000654 additive Substances 0.000 claims description 12
- 230000000996 additive effect Effects 0.000 claims description 12
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical group [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 12
- 238000010276 construction Methods 0.000 claims description 8
- 241000237858 Gastropoda Species 0.000 claims description 7
- 230000000717 retained effect Effects 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000008151 electrolyte solution Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 239000011736 potassium bicarbonate Substances 0.000 claims description 6
- 229910000028 potassium bicarbonate Inorganic materials 0.000 claims description 6
- 235000015497 potassium bicarbonate Nutrition 0.000 claims description 6
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 6
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 229910052726 zirconium Inorganic materials 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 2
- 238000000605 extraction Methods 0.000 abstract description 2
- 238000003801 milling Methods 0.000 description 32
- 238000005553 drilling Methods 0.000 description 31
- 238000000227 grinding Methods 0.000 description 21
- 230000009286 beneficial effect Effects 0.000 description 8
- 230000007613 environmental effect Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000003129 oil well Substances 0.000 description 7
- 230000000295 complement effect Effects 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 206010016970 Foot fracture Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- 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
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/02—Alloys based on magnesium with aluminium as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/04—Alloys based on magnesium with zinc or cadmium as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
- C22C30/06—Alloys containing less than 50% by weight of each constituent containing zinc
-
- 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
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention belongs to the technical field of oil extraction in oil fields, and particularly provides a method for quickly removing a soluble bridge plug when meeting a blockage, which comprises the steps of sequentially injecting clear water, a dissolving liquid accelerating slug and clear water into a wellhead, and stopping a pump and shutting down a well after the slug meets a blockage position; injecting clear water, and stopping the pump and shutting down the well after the slug replaces the position meeting the blockage; injecting a sand-carrying fluid slug into a wellhead to polish the casing wall of the shaft, so that a bridge plug rubber cylinder and dissolved residues on the casing wall are peeled off; the soluble ball is thrown in to push the dispersed and detained residues in the shaft to a fractured well section of the toe part, so that the problems that the conventional ignition releasing soluble bridge plug cannot be completely dissolved in a stratum with lower temperature, a bridge plug rubber sleeve and the residues still can be located on the wall of a casing to influence the normal pumping of a subsequent bridge shooting tool, the labor intensity is high, the cost is high and the risk is large are solved.
Description
Technical Field
The invention belongs to the technical field of oil extraction in oil fields, and particularly relates to a method for quickly removing a soluble bridge plug in case of blockage.
Background
For fracturing modification of a horizontal well with a compact reservoir, a smooth casing fracturing process combining soluble bridge plugs and multiple clusters of perforation is adopted in the existing main body, the technology is totally mature, and the technology is popularized and applied to 2000 sections of 100 horizontal wells in the year by taking an Ordos basin as an example. Under the influence of adverse factors such as fluctuation of a horizontal section well track, smoothness of a shaft, change of pumping pressure of the bridge plug and the like, the soluble bridge plug can be blocked, blocked and the like in advance in the pumping process of the soluble bridge plug, so that the soluble bridge plug cannot move up and down and is forced to stop construction. At present, the soluble bridge plug is usually released by ignition, then KCl solution (1%) is pumped in, and the well is closed for several days (10-15 days) to make the bridge plug dissolve by itself. However, in a formation with a lower temperature, the method often cannot completely dissolve the bridge plug, the bridge plug rubber sleeve and the dissolved residues still can be located on the casing wall to influence the normal pumping of a subsequent bridge shooting tool, and the normal pumping can be removed by generally adopting a conventional oil pipe + milling drilling tool or a continuous oil pipe + milling drilling tool to perform drilling and milling, but the treatment scheme has the following problems: for a conventional oil pipe and a milling drilling tool, firstly, the derrick needs to be erected again when the oil pipe is lowered, the labor intensity is high, the consumed time is long, and the overall processing time exceeds 20 days; secondly, in the process of milling, the liquid entering the ground of the pressed well section can return to the stratum when the well mouth is opened, which is not beneficial to safety, environmental protection and stable production of the oil well. For coiled tubing and a milling drilling tool, firstly, for a horizontal well with a large water sag, the coiled tubing can have a self-locking phenomenon; secondly, the treatment cost of the continuous oil pipe is high, and the single cost is 30-50 ten thousand yuan; thirdly, the drill jamming is not easy to remove when the coiled tubing is drilled and ground, and the risk of underground accidents is extremely high.
Disclosure of Invention
The invention provides a method for quickly removing a soluble bridge plug in case of blockage, which aims to overcome the defects that in the prior art, for a conventional oil pipe and a milling drilling tool: firstly, the derrick needs to be erected again when the oil pipe is lowered, the labor intensity is high, the consumed time is long, and the overall processing time exceeds 20 days; secondly, in the milling process, the ground entering liquid of the pressed well section returns to the stratum when the well mouth is opened, which is not beneficial to the safety and environmental protection and the stable production of the oil well; second, overcome among the prior art to coiled tubing + milling drilling tool: firstly, for a horizontal well with a large water sag, a self-locking phenomenon of a coiled tubing occurs; secondly, the treatment cost of the continuous oil pipe is high, and the single cost is 30-50 ten thousand yuan; thirdly, the drill jamming is not easy to remove when the coiled tubing is drilled and ground, and the risk of underground accidents is very high.
Therefore, the invention provides a method for quickly removing a soluble bridge plug from an obstruction card, which comprises the following steps:
1) injecting clear water into the well head, then injecting accelerated dissolution liquid slug, and finally injecting clear water, stopping the pump and shutting down the well after the accelerated dissolution liquid slug meets the position of the soluble bridge plug and the position of the position is blocked, wherein the well shutting down time is 1-2 hours, and the injection displacement of the accelerated dissolution liquid slug is 1.0-2.0m3Min, volume of accelerated dissolution liquid slug is 1-2m3;
2) Injecting clear water at a well mouth, replacing the soluble bridge plug with the dissolution accelerating liquid slug in the step 1), stopping the pump and shutting down the well after the soluble bridge plug meets the blocking position, wherein the well shutting down time is 0.5-1.0 hour, and the injection displacement of the clear water is 1.0-2.0m3/min;
3) Repeating the steps 1) to 2) for 3-5 times, so that the dissolving solution positioned when the soluble bridge plug meets the blocking card is alternately replaced in the accelerated dissolving solution slug and the clear water;
4) injecting a sand-carrying fluid slug into a wellhead to polish the casing wall of the shaft, so that a bridge plug rubber cylinder on the casing wall and the dissolved residue in the step 3) are peeled off, wherein the injection displacement of the sand-carrying fluid slug is 4.0-6.0m3Min, the number of sand carrying liquid slugs is 3-5;
5) putting soluble balls at a wellhead, and pushing dissolved residues dispersed and retained in the shaft in the step 4) to a fractured well section of the toe part to ensure that the shaft of the well section which is not operated at the heel part is smooth and clean; the soluble ball is 2.0-3.0m3A displacement pump of/min;
6) and pumping by lowering a soluble bridge plug and a multi-cluster perforation tool again to perform fracturing construction of the target well section.
The dissolution accelerating solution in the step 1) is a KCl solution with the concentration of 1-5%.
The dosage of the sand-carrying fluid slug in the step 4) is 20.0-30.0m3The specification of the sand is 20-40 meshes, and the sand concentration is 150Kg/m3。
The sand-carrying liquid slug is carried by guanidine gum liquid, and the guanidine gum liquid comprises the following components in percentage by mass: 0.2 percent of guanidine gum, 0.35 percent of additive and the balance of water, wherein the additive is K2CO3、KHCO3、Na2One or a combination of more of CO 3.
The diameter of the soluble ball in the step 5) is phi 100 mm-phi 140 mm.
The properties of the soluble spheres are: the density is 2.0-2.3g/cm3The product can be dissolved in KCl-containing electrolyte solution for no more than 20 days, and has a temperature resistance of more than 150 ℃ and a compressive strength of more than 70 MPa.
The soluble ball comprises the following chemical components in percentage by mass: mg: 30-85%, Al: 13-25%, Zn: 2-15%, Fe: 0.1-5%, Cu: 0.05-5%, Ni: 0.05-5%, Ag: 0.05-5%, Zr: 0.05 to 0.5%, Ti: 0.05-0.5 percent.
The number of soluble balls is 1.
The sand is quartz sand.
The invention has the beneficial effects that: the invention provides a method for quickly removing a soluble bridge plug from an obstruction card, which comprises the following steps:
1) injecting clear water into the well head, then injecting accelerated dissolution liquid slug, and finally injecting clear water, stopping the pump and shutting down the well after the accelerated dissolution liquid slug meets the position of the soluble bridge plug and the position of the position is blocked, wherein the well shutting down time is 1-2 hours, and the injection displacement of the accelerated dissolution liquid slug is 1.0-2.0m3Min, volume of accelerated dissolution liquid slug is 1-2m3;
2) Injecting clear water at a well mouth, replacing the soluble bridge plug with the dissolution accelerating liquid slug in the step 1), stopping the pump and shutting down the well after the soluble bridge plug meets the blocking position, wherein the well shutting down time is 0.5-1.0 hour, and the injection displacement of the clear water is 1.0-2.0m3/min;
3) Repeating the steps 1) to 2) for 3-5 times, so that the dissolving solution positioned when the soluble bridge plug meets the blocking card is alternately replaced in the accelerated dissolving solution slug and the clear water;
4) injecting a sand-carrying fluid slug into a wellhead to polish the casing wall of the shaft, so that a bridge plug rubber cylinder on the casing wall and the dissolved residue in the step 3) are peeled off, wherein the injection displacement of the sand-carrying fluid slug is 4.0-6.0m3Min, the number of sand carrying liquid slugs is 3-5;
5) putting soluble balls at a wellhead, and pushing dissolved residues dispersed and retained in the shaft in the step 4) to a fractured well section of the toe part to ensure that the shaft of the well section which is not operated at the heel part is smooth and clean; the soluble ball is 2.0-3.0m3A displacement pump of/min;
6) and pumping by lowering a soluble bridge plug and a multi-cluster perforation tool again to perform fracturing construction of the target well section.
Has the following beneficial effects:
1) on the premise of not opening a well head and not putting a grinding and milling pipe column, the labor intensity of workers can be greatly reduced only by operating at the well head to be pressed;
2) the soluble bridge plug can be quickly removed, the well can be smoothly cleaned after removal, the subsequent bridge injection pumping and the operation are smooth, the operation time is only 4-6 days, and the operation time can be shortened by 14-16 days compared with that of a vertical derrick and a lower grinding and milling drilling tool;
3) the implementation cost is low, and the device only comprises 5-10m3Accelerated dissolution solution, 1-2m3Quartz sand and 1 soluble ball, the operation cost is not more than 5000 yuan, and compared with the vertical derrickThe down-grinding milling drilling tool can save 4-5 ten thousand yuan, and can save more than 30 ten thousand yuan compared with the drilling and grinding of a continuous oil pipe;
4) the well head is waited to press the operation, need not to open the well head, can make the income ground liquid of the well section that has fractured earlier stage detain in the stratum complementary energy, be favorable to safe environmental protection and oil well steady production.
The method is cumulatively applied for 12 wells in the Ordos basin when the compact oil-soluble bridge plug meets the horizontal well, the effective rate is 100 percent, the average single well removing time is only 5 days, the method shortens 15 days compared with the manual treatment method of a vertical derrick and a lower grinding milling drilling tool, and saves 35 ten thousand yuan compared with continuous oil pipe drilling.
Detailed Description
Example 1:
a method for quickly removing a soluble bridge plug from an occlusion card comprises the following steps:
1) injecting clear water into the well head, then injecting accelerated dissolution liquid slug, and finally injecting clear water, stopping the pump and shutting down the well after the accelerated dissolution liquid slug meets the position of the soluble bridge plug and the position of the position is blocked, wherein the well shutting down time is 1-2 hours, and the injection displacement of the accelerated dissolution liquid slug is 1.0-2.0m3Min, volume of accelerated dissolution liquid slug is 1-2m3;
2) Injecting clear water at a well mouth, replacing the soluble bridge plug with the dissolution accelerating liquid slug in the step 1), stopping the pump and shutting down the well after the soluble bridge plug meets the blocking position, wherein the well shutting down time is 0.5-1.0 hour, and the injection displacement of the clear water is 1.0-2.0m3/min;
3) Repeating the steps 1) to 2) for 3-5 times, so that the dissolving solution positioned when the soluble bridge plug meets the blocking card is alternately replaced in the accelerated dissolving solution slug and the clear water; the soluble bridge plug is alternatively exposed in the solution and clear water, so that the purpose of instantly replacing the solution near the position of the soluble bridge plug meeting the block is achieved, and the electrolytic reaction of the metal body of the soluble bridge plug is accelerated.
4) Injecting a sand-carrying fluid slug into a wellhead to polish the casing wall of the shaft, so that a bridge plug rubber cylinder on the casing wall and the dissolved residue in the step 3) are peeled off, wherein the injection displacement of the sand-carrying fluid slug is 4.0-6.0m3Min, the number of sand carrying liquid slugs is 3-5;
5) throwing soluble ball at well headPushing the dissolved residues dispersed and retained in the shaft in the step 4) to a fractured well section at the toe part to ensure that the shaft at the non-operation well section at the heel part is smooth and clean; the soluble ball is 2.0-3.0m3A displacement pump of/min;
6) and pumping by lowering a soluble bridge plug and a multi-cluster perforation tool again to perform fracturing construction of the target well section.
The dissolution accelerating solution in the step 1) is a KCl solution with the concentration of 1-5%.
The dosage of the sand-carrying fluid slug in the step 4) is 20.0-30.0m3The specification of the sand is 20-40 meshes, and the sand concentration is 150Kg/m3。
The sand-carrying liquid slug is carried by guanidine gum liquid, and the guanidine gum liquid comprises the following components in percentage by mass: 0.2 percent of guanidine gum, 0.35 percent of additive and the balance of water, wherein the additive is K2CO3、KHCO3、Na2One or a combination of more of CO 3.
The diameter of the soluble ball in the step 5) is phi 100 mm-phi 140 mm.
The properties of the soluble spheres are: the density is 2.0-2.3g/cm3The product can be dissolved in KCl-containing electrolyte solution for no more than 20 days, and has a temperature resistance of more than 150 ℃ and a compressive strength of more than 70 MPa.
The soluble ball comprises the following chemical components in percentage by mass: mg: 30-85%, Al: 13-25%, Zn: 2-15%, Fe: 0.1-5%, Cu: 0.05-5%, Ni: 0.05-5%, Ag: 0.05-5%, Zr: 0.05 to 0.5%, Ti: 0.05-0.5 percent.
The number of soluble balls is 1.
The sand is quartz sand.
The invention designs a method for quickly removing a soluble bridge plug from an obstruction card, which has the following beneficial effects:
1) on the premise of not opening a well head and not putting a grinding and milling pipe column, the labor intensity of workers can be greatly reduced only by operating at the well head to be pressed;
2) the soluble bridge plug can be quickly removed, the well can be smoothly cleaned after removal, the subsequent bridge injection pumping and the operation are smooth, the operation time is only 4-6 days, and the operation time can be shortened by 14-16 days compared with that of a vertical derrick and a lower grinding and milling drilling tool;
3) the implementation cost is low, and the device only comprises 5-10m3Accelerated dissolution solution, 1-2m3The operation cost of the quartz sand and 1 soluble ball is not more than 5000 yuan, and the quartz sand and the 1 soluble ball can be saved by 4-5 ten thousand yuan compared with a vertical derrick and a lower grinding and milling drilling tool and can be saved by more than 30 ten thousand yuan compared with a continuous oil pipe;
4) the well head is waited to press the operation, need not to open the well head, can make the income ground liquid of the well section that has fractured earlier stage detain in the stratum complementary energy, be favorable to safe environmental protection and oil well steady production.
The method is cumulatively applied for 12 wells in the Ordos basin when the compact oil-soluble bridge plug meets the horizontal well, the effective rate is 100 percent, the average single well removing time is only 5 days, the method shortens 15 days compared with the manual treatment method of a vertical derrick and a lower grinding milling drilling tool, and saves 35 ten thousand yuan compared with continuous oil pipe drilling.
Example 2:
a method for quickly removing a soluble bridge plug from an occlusion card comprises the following steps:
1) injecting clear water into the well mouth, then injecting accelerated dissolution liquid slug, and finally injecting clear water, stopping the pump and shutting down the well after the accelerated dissolution liquid slug meets the position of the soluble bridge plug when meeting the blocking position, wherein the injection displacement of the accelerated dissolution liquid slug is 2.0m3Min, volume of accelerated dissolution slug is 2m3(ii) a The accelerated dissolution solution is a KCl solution with the concentration of 1%.
2) Injecting clean water at a well mouth, replacing the soluble bridge plug with the dissolution accelerating liquid slug in the step 1), stopping the pump and shutting down the well after the soluble bridge plug meets the blocking position, wherein the well shutting down time is 1.0 hour, and the injection displacement of the clean water is 2.0m3/min;
3) Repeating the steps 1) to 2) for 3 times, so that the dissolving solution positioned when the soluble bridge plug meets the blocking card is alternately replaced in the accelerated dissolving solution slug and the clear water;
4) injecting a sand-carrying fluid slug into a wellhead to polish the casing wall of the shaft, so that a bridge plug rubber cylinder on the casing wall and the dissolved residue in the step 3) are peeled off, wherein the injection displacement of the sand-carrying fluid slug is 6.0m3Min, the number of sand carrying liquid slugs is 5; the dosage of the sand-carrying liquid slug is 20.0m3The specification of the quartz sand is 20-40 meshes, and the sand concentration is 120Kg/m3(ii) a The sand-carrying liquid slug is carried by guanidine gum liquid, and the guanidine gum liquid comprises the following components in percentage by mass: 0.2 percent of guanidine gum, 0.35 percent of additive and the balance of water, wherein the additive is K2CO3、KHCO3、Na2One or a combination of more of CO 3;
5) putting soluble balls at a wellhead, and pushing dissolved residues dispersed and retained in the shaft in the step 4) to a fractured well section of the toe part to ensure that the shaft of the well section which is not operated at the heel part is smooth and clean; the soluble ball is 3.0m3A displacement pump of/min; the diameter of the soluble ball in the step 5) is phi 100 mm; the properties of the soluble spheres are: the density was 2.0g/cm3The solution can be dissolved in an electrolyte solution containing KCl for no more than 20 days, and the temperature resistance is higher than 150 ℃, and the compressive strength is higher than 70 MPa; the soluble ball comprises the following chemical components in percentage by mass: mg: 30%, Al: 13%, Zn: 2%, Fe: 0.1%, Cu: 0.05%, Ni: 0.05%, Ag: 0.05%, Zr: 0.05%, Ti: 0.05 percent; the number of the soluble balls is 1;
6) and pumping by lowering a soluble bridge plug and a multi-cluster perforation tool again to perform fracturing construction of the target well section.
The invention designs a method for quickly removing a soluble bridge plug from an obstruction card, which has the following beneficial effects:
1) on the premise of not opening a well head and not putting a grinding and milling pipe column, the labor intensity of workers can be greatly reduced only by operating at the well head to be pressed;
2) the soluble bridge plug can be quickly removed, the well can be smooth and clean after removal, the subsequent bridge injection pumping and operation are smooth, the operation time is only 6 days, and the operation time can be shortened by 16 days compared with that of a vertical derrick and a lower grinding and milling drilling tool;
3) the implementation cost is low, and only comprises 6m3The dissolving liquid, the quartz sand and the 1 soluble ball are accelerated, the operation cost is not more than 5000 yuan, and the drilling and milling device can save 5 ten thousand yuan compared with a vertical derrick and a lower grinding and milling drilling tool and can save 40 ten thousand yuan compared with a continuous oil pipe;
4) the well head is waited to press the operation, need not to open the well head, can make the income ground liquid of the well section that has fractured earlier stage detain in the stratum complementary energy, be favorable to safe environmental protection and oil well steady production.
The method is cumulatively applied for 12 wells in the Ordos basin when the compact oil-soluble bridge plug meets the horizontal well, the effective rate is 100 percent, the average single well removing time is only 5 days, the method shortens 15 days compared with the manual treatment method of a vertical derrick and a lower grinding milling drilling tool, and saves 40 ten thousand yuan compared with continuous oil pipe drilling.
Example 3:
a method for quickly removing a soluble bridge plug from an occlusion card comprises the following steps:
1) firstly injecting clear water into a well mouth, then injecting an accelerated dissolution liquid slug, and finally injecting clear water, stopping a pump and shutting down the well after the accelerated dissolution liquid slug meets a position of a soluble bridge plug and is blocked, wherein the well shutting down time is 1.5 hours, and the injection displacement of the accelerated dissolution liquid slug is 1.5m3Min, volume of accelerated dissolution slug is 1.5m3(ii) a The accelerated dissolution solution is a KCl solution with the concentration of 3%.
2) Injecting clear water at a well mouth, replacing the soluble bridge plug with the dissolution accelerating liquid slug in the step 1), stopping the pump and shutting down the well after the soluble bridge plug meets the blocking position, wherein the well shutting down time is 7.5 hours, and the injection displacement of the clear water is 1.5m3/min;
3) Repeating the steps 1) to 2) for 4 times, so that the dissolving solution positioned when the soluble bridge plug meets the blocking card is alternately replaced in the accelerated dissolving solution slug and the clear water;
4) injecting a sand-carrying fluid slug into a wellhead to polish the casing wall of the shaft, so that a bridge plug rubber cylinder on the casing wall and the dissolved residue in the step 3) are peeled off, wherein the injection displacement of the sand-carrying fluid slug is 5.0m3Min, the number of sand carrying liquid slugs is 4; the dosage of the sand-carrying liquid slug is 25.0m3The specification of the quartz sand is 30 meshes, and the concentration of the sand is 135Kg/m3(ii) a The sand-carrying liquid slug is carried by guanidine gum liquid, and the guanidine gum liquid comprises the following components in percentage by mass: 0.2 percent of guanidine gum, 0.35 percent of additive and the balance of water, wherein the additive is K2CO3、KHCO3、Na2One or a combination of more of CO 3;
5) throwing a soluble ball at the wellhead to push dissolved residues dispersed and retained in the wellbore in the step 4) to a fractured toe wellSection, ensuring that a shaft of the well section with no operation at the heel part is smooth and clean; the soluble ball is 2.5m3A displacement pump of/min; the diameter of the soluble ball in the step 5) is phi 118 mm; the properties of the soluble spheres are: the density was 2.2g/cm3The solution can be dissolved in an electrolyte solution containing KCl for no more than 20 days, and the temperature resistance is higher than 150 ℃, and the compressive strength is higher than 70 MPa; the soluble ball comprises the following chemical components in percentage by mass: mg: 58%, Al: 19%, Zn: 8.5%, Fe: 2.5%, Cu: 2.02%, Ni: 2.02%, Ag: 2.02%, Zr: 0.27%, Ti: 0.27 percent; the number of the soluble balls is 1;
6) and pumping by lowering a soluble bridge plug and a multi-cluster perforation tool again to perform fracturing construction of the target well section.
The invention designs a method for quickly removing a soluble bridge plug from an obstruction card, which has the following beneficial effects:
1) on the premise of not opening a well head and not putting a grinding and milling pipe column, the labor intensity of workers can be greatly reduced only by operating at the well head to be pressed;
2) the soluble bridge plug can be quickly removed, the well can be smooth and clean after removal, the subsequent bridge injection pumping and operation are smooth, the operation time is only 4 days, and the operation time can be shortened by 16 days compared with that of a vertical derrick and a lower grinding and milling drilling tool;
3) the implementation cost is low, and only comprises 6m3The operation cost does not exceed 5000 yuan due to the fact that the dissolving liquid, the quartz sand and the 1 soluble ball are accelerated, 7 ten thousand yuan can be saved compared with a vertical derrick and a lower grinding and milling drilling tool, and 38 ten thousand yuan can be saved compared with a continuous oil pipe drilling and milling tool;
4) the well head is waited to press the operation, need not to open the well head, can make the income ground liquid of the well section that has fractured earlier stage detain in the stratum complementary energy, be favorable to safe environmental protection and oil well steady production.
The method is cumulatively applied for 12 wells in the Ordos basin when the compact oil-soluble bridge plug meets the horizontal well, the effective rate is 100 percent, the average single well removing time is only 5 days, the method shortens 15 days compared with the manual treatment method of a vertical derrick and a lower grinding milling drilling tool, and saves 38 ten thousand yuan compared with continuous oil pipe drilling.
Example 4:
a method for quickly removing a soluble bridge plug from an occlusion card comprises the following steps:
1) injecting clear water into the well mouth, then injecting accelerated dissolution liquid slug, and finally injecting clear water, stopping the pump and shutting down the well after the accelerated dissolution liquid slug meets the position of the soluble bridge plug when meeting the blocking position, wherein the injection displacement of the accelerated dissolution liquid slug is 1.0m3Min, volume of accelerated dissolution slug is 1m3(ii) a The accelerated dissolution solution is a KCl solution with the concentration of 5%.
2) Injecting clear water at a well mouth, replacing the soluble bridge plug with the dissolution accelerating liquid slug in the step 1), stopping the pump and shutting down the well after the soluble bridge plug meets the blocking position, wherein the well shutting down time is 0.5 hour, and the injection displacement of the clear water is 1.0m3/min;
3) Repeating the steps 1) to 2) for 5 times, so that the dissolving solution positioned when the soluble bridge plug meets the blocking card is alternately replaced in the accelerated dissolving solution slug and the clear water;
4) injecting a sand-carrying fluid slug into a wellhead to polish the casing wall of the shaft, so that a bridge plug rubber cylinder on the casing wall and the dissolved residue in the step 3) are peeled off, wherein the injection displacement of the sand-carrying fluid slug is 4.0m3Min, the number of sand carrying liquid slugs is 3; the dosage of the sand-carrying liquid slug is 30.0m3The specification of the quartz sand is 20-40 meshes, and the sand concentration is 150Kg/m3(ii) a The sand-carrying liquid slug is carried by guanidine gum liquid, and the guanidine gum liquid comprises the following components in percentage by mass: 0.2 percent of guanidine gum, 0.35 percent of additive and the balance of water, wherein the additive is K2CO3、KHCO3、Na2One or a combination of more of CO 3;
5) putting soluble balls at a wellhead, and pushing dissolved residues dispersed and retained in the shaft in the step 4) to a fractured well section of the toe part to ensure that the shaft of the well section which is not operated at the heel part is smooth and clean; the soluble ball is 2.0m3A displacement pump of/min; the diameter of the soluble ball in the step 5) is phi 1 phi 140 mm; the properties of the soluble spheres are: the density was 2.3g/cm3The solution can be dissolved in an electrolyte solution containing KCl for no more than 20 days, and the temperature resistance is higher than 150 ℃, and the compressive strength is higher than 70 MPa; the soluble ball comprises the following chemical components in percentage by mass: mg: 85%, Al: 25%, Zn: 15%, Fe: 5%, Cu: 5%, Ni: 5 percent of the total weight of the mixture,ag: 5%, Zr: 0.5%, Ti: 0.5 percent; the number of the soluble balls is 1;
6) and pumping by lowering a soluble bridge plug and a multi-cluster perforation tool again to perform fracturing construction of the target well section.
The invention designs a method for quickly removing a soluble bridge plug from an obstruction card, which has the following beneficial effects:
1) on the premise of not opening a well head and not putting a grinding and milling pipe column, the labor intensity of workers can be greatly reduced only by operating at the well head to be pressed;
2) the soluble bridge plug can be quickly removed, the well can be smooth and clean after removal, the subsequent bridge injection pumping and operation are smooth, the operation time is only 4 days, and the operation time can be shortened by 14 days compared with that of a vertical derrick and a lower grinding and milling drilling tool;
3) the implementation cost is low, and only comprises 5m3The dissolving liquid, the quartz sand and the 1 soluble ball are accelerated, the operation cost is not more than 5000 yuan, 4 ten thousand yuan can be saved compared with a vertical derrick and a lower grinding and milling drilling tool, and 35 ten thousand yuan can be saved compared with a continuous oil pipe drilling and milling tool;
4) the well head is waited to press the operation, need not to open the well head, can make the income ground liquid of the well section that has fractured earlier stage detain in the stratum complementary energy, be favorable to safe environmental protection and oil well steady production.
The method is cumulatively applied for 12 wells in the Ordos basin when the compact oil-soluble bridge plug meets the horizontal well, the effective rate is 100 percent, the average single well removing time is only 5 days, the method shortens 15 days compared with the manual treatment method of a vertical derrick and a lower grinding milling drilling tool, and saves 35 ten thousand yuan compared with continuous oil pipe drilling.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (9)
1. A method for quickly removing a soluble bridge plug from an obstruction card is characterized by comprising the following steps: the method comprises the following steps:
1) injecting clear water into the well head, then injecting a dissolving solution accelerating slug, and finally injecting clear water, wherein the dissolving solution accelerating slug is blocked by a soluble bridge plugStopping the pump after the position is blocked, shutting down the well for 1-2 hours, wherein the injection displacement of the accelerated dissolution liquid slug is 1.0-2.0m3Min, volume of accelerated dissolution liquid slug is 1-2m3;
2) Injecting clear water at a well mouth, replacing the soluble bridge plug with the dissolution accelerating liquid slug in the step 1), stopping the pump and shutting down the well after the soluble bridge plug meets the blocking position, wherein the well shutting down time is 0.5-1.0 hour, and the injection displacement of the clear water is 1.0-2.0m3/min;
3) Repeating the steps 1) to 2) for 3-5 times, so that the dissolving solution positioned when the soluble bridge plug meets the blocking card is alternately replaced in the accelerated dissolving solution slug and the clear water;
4) injecting a sand-carrying fluid slug into a wellhead to polish the casing wall of the shaft, so that a bridge plug rubber cylinder on the casing wall and the dissolved residue in the step 3) are peeled off, wherein the injection displacement of the sand-carrying fluid slug is 4.0-6.0m3Min, the number of sand carrying liquid slugs is 3-5;
5) putting soluble balls at a wellhead, and pushing dissolved residues dispersed and retained in the shaft in the step 4) to a fractured well section of the toe part to ensure that the shaft of the well section which is not operated at the heel part is smooth and clean; the soluble ball is 2.0-3.0m3A displacement pump of/min;
6) and pumping by lowering a soluble bridge plug and a multi-cluster perforation tool again to perform fracturing construction of the target well section.
2. The method of claim 1 for the rapid removal of a soluble bridge plug encounter card, wherein: the dissolution accelerating solution in the step 1) is a KCl solution with the concentration of 1-5%.
3. The method of claim 2 for the rapid removal of a soluble bridge plug encounter card, wherein: the dosage of the sand-carrying fluid slug in the step 4) is 20.0-30.0m3The specification of the sand is 20-40 meshes, and the sand concentration is 150Kg/m3。
4. The method of claim 3 for the rapid removal of a soluble bridge plug encounter card, wherein: the sand-carrying liquid slug is carried by guanidine gum liquid, and the guanidine gum liquid comprises the following components in parts by massThe weight percentage composition is as follows: 0.2 percent of guanidine gum, 0.35 percent of additive and the balance of water, wherein the additive is K2CO3、KHCO3、Na2One or a combination of more of CO 3.
5. The method of claim 4 for the rapid removal of a soluble bridge plug encounter card, wherein: the diameter of the soluble ball in the step 5) is phi 100 mm-phi 140 mm.
6. The method of claim 5 for the rapid removal of a soluble bridge plug encounter card, wherein: the properties of the soluble spheres are: the density is 2.0-2.3g/cm3The product can be dissolved in KCl-containing electrolyte solution for no more than 20 days, and has a temperature resistance of more than 150 ℃ and a compressive strength of more than 70 MPa.
7. The method of claim 6 for the rapid removal of a soluble bridge plug encounter card, wherein: the soluble ball comprises the following chemical components in percentage by mass: mg: 30-85%, Al: 13-25%, Zn: 2-15%, Fe: 0.1-5%, Cu: 0.05-5%, Ni: 0.05-5%, Ag: 0.05-5%, Zr: 0.05 to 0.5%, Ti: 0.05-0.5 percent.
8. The method of claim 7 for the rapid removal of a soluble bridge plug encounter card, wherein: the number of soluble balls is 1.
9. The method of claim 8 for the rapid removal of a soluble bridge plug encounter card, wherein: the sand is quartz sand.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201911155485.0A CN111021977B (en) | 2019-11-22 | 2019-11-22 | Method for quickly removing soluble bridge plug in case of blocking |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201911155485.0A CN111021977B (en) | 2019-11-22 | 2019-11-22 | Method for quickly removing soluble bridge plug in case of blocking |
Publications (2)
Publication Number | Publication Date |
---|---|
CN111021977A true CN111021977A (en) | 2020-04-17 |
CN111021977B CN111021977B (en) | 2022-05-10 |
Family
ID=70207156
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201911155485.0A Active CN111021977B (en) | 2019-11-22 | 2019-11-22 | Method for quickly removing soluble bridge plug in case of blocking |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN111021977B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111826147A (en) * | 2020-07-14 | 2020-10-27 | 东方宝麟科技发展(北京)有限公司 | Soluble bridge plug cosolvent for horizontal well fracturing and soluble bridge plug dissolution assisting process |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120043085A1 (en) * | 2010-08-19 | 2012-02-23 | Schlumberger Technology Corporation | Wellbore service fluid and methods of use |
CN203394493U (en) * | 2013-07-05 | 2014-01-15 | 中国石油天然气股份有限公司 | Fracturing process pipe column with soluble bridge plug |
CN104564003A (en) * | 2014-12-23 | 2015-04-29 | 中国石油天然气股份有限公司 | Drilling-plug-free pumping-in hydraulic bridge plug staged fracturing method |
CN104989358A (en) * | 2015-06-18 | 2015-10-21 | 中国石油化工股份有限公司华东分公司采油厂 | Shale gas horizontal well bridge plug separation and ball throwing segmented fracturing process |
CN105840166A (en) * | 2016-04-19 | 2016-08-10 | 中石化重庆涪陵页岩气勘探开发有限公司 | Horizontal well fracturing gas testing and well completion technology adopting completely dissoluble bridge plug |
CN106244125A (en) * | 2016-08-26 | 2016-12-21 | 中国石油集团渤海钻探工程有限公司 | Stuck releasing and dissolving agent for underground bridge plug/packer stuck rubber part |
CN106437614A (en) * | 2016-10-18 | 2017-02-22 | 中国石油集团长城钻探工程有限公司 | Horizontal well full-bore soluble degradable fracturing bridge plug |
CN107724995A (en) * | 2017-11-28 | 2018-02-23 | 西安石油大学 | A kind of mechanical-set half dissolving bridging device and its fracturing process |
-
2019
- 2019-11-22 CN CN201911155485.0A patent/CN111021977B/en active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120043085A1 (en) * | 2010-08-19 | 2012-02-23 | Schlumberger Technology Corporation | Wellbore service fluid and methods of use |
CN203394493U (en) * | 2013-07-05 | 2014-01-15 | 中国石油天然气股份有限公司 | Fracturing process pipe column with soluble bridge plug |
CN104564003A (en) * | 2014-12-23 | 2015-04-29 | 中国石油天然气股份有限公司 | Drilling-plug-free pumping-in hydraulic bridge plug staged fracturing method |
CN104989358A (en) * | 2015-06-18 | 2015-10-21 | 中国石油化工股份有限公司华东分公司采油厂 | Shale gas horizontal well bridge plug separation and ball throwing segmented fracturing process |
CN105840166A (en) * | 2016-04-19 | 2016-08-10 | 中石化重庆涪陵页岩气勘探开发有限公司 | Horizontal well fracturing gas testing and well completion technology adopting completely dissoluble bridge plug |
CN106244125A (en) * | 2016-08-26 | 2016-12-21 | 中国石油集团渤海钻探工程有限公司 | Stuck releasing and dissolving agent for underground bridge plug/packer stuck rubber part |
CN106437614A (en) * | 2016-10-18 | 2017-02-22 | 中国石油集团长城钻探工程有限公司 | Horizontal well full-bore soluble degradable fracturing bridge plug |
CN107724995A (en) * | 2017-11-28 | 2018-02-23 | 西安石油大学 | A kind of mechanical-set half dissolving bridging device and its fracturing process |
Non-Patent Citations (1)
Title |
---|
夏海帮: "可溶桥塞在南川页岩气田的应用研究", 《油气藏评价与开发》 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111826147A (en) * | 2020-07-14 | 2020-10-27 | 东方宝麟科技发展(北京)有限公司 | Soluble bridge plug cosolvent for horizontal well fracturing and soluble bridge plug dissolution assisting process |
CN111826147B (en) * | 2020-07-14 | 2022-08-26 | 东方宝麟科技发展(北京)有限公司 | Soluble bridge plug cosolvent for horizontal well fracturing and soluble bridge plug dissolution assisting process |
Also Published As
Publication number | Publication date |
---|---|
CN111021977B (en) | 2022-05-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN108979569A (en) | A kind of method of three layers of de-plugging of fixed tubular column | |
US10060244B2 (en) | System and method for hydraulic fracturing with nanoparticles | |
CN103740353B (en) | A kind of composite blockage relieving agent and tight sandstone reservoir fracturing production horizontal well composite blockage relieving method | |
CN109337660B (en) | Low-pressure carbonate reservoir gas well temporary plugging workover fluid and preparation and application methods thereof | |
US20180238133A1 (en) | Sharp and erosion resistance degradable material for slip buttons and sliding sleeve baffles | |
CN102250603B (en) | Separated injection oil well composite blocking remover and injection method thereof | |
US20130312974A1 (en) | Controlling hydrogen sulfide production in oilfield operations | |
CN108300439B (en) | Water-soluble temporary plugging agent for fracturing temporary plugging steering of oil and gas well and preparation method thereof | |
SA520420482B1 (en) | Novel downhole methods | |
CN111021977B (en) | Method for quickly removing soluble bridge plug in case of blocking | |
CN105255467B (en) | A kind of composite blockage relieving agent for tight sandstone reservoir | |
CN109973067A (en) | Horizontal well crack blocks pit shaft and reproduces refracturing method | |
CN106246156B (en) | A kind of explosion fracturing acidification connection makees method | |
CN112627773B (en) | Gas well shaft compound blockage treatment method | |
CN111621276A (en) | Solid acid plugging agent and method for removing stratum plugging by using same | |
CN104632124A (en) | Method for blocking severely polluted deep well sandstone reservoir | |
CN111779466B (en) | Method for solving problem of shaft blockage of failed prefabricated restrictor through hydraulic sand blasting perforation process | |
CN116875296A (en) | Solid acid precursor for reservoir reformation | |
CN111350468B (en) | Method for releasing stuck coiled tubing in case of sticking in horizontal well | |
CN107893645B (en) | Chemical blockage removal method | |
CN111826147B (en) | Soluble bridge plug cosolvent for horizontal well fracturing and soluble bridge plug dissolution assisting process | |
US20190234163A1 (en) | Hookless Hanger For A Multilateral Wellbore | |
CN109723377B (en) | Open hole well completion reservoir integrated transformation method for window-opening side drilling | |
RU2534291C1 (en) | Wet gas or gas condensate well recovery method and its drowning prevention during its further operation | |
RU2509883C1 (en) | Carbonate formation hydraulic fracturing method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |