CN112647892A - Method for temporarily blocking large-scale underground fracturing hole - Google Patents
Method for temporarily blocking large-scale underground fracturing hole Download PDFInfo
- Publication number
- CN112647892A CN112647892A CN202011579941.7A CN202011579941A CN112647892A CN 112647892 A CN112647892 A CN 112647892A CN 202011579941 A CN202011579941 A CN 202011579941A CN 112647892 A CN112647892 A CN 112647892A
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- Prior art keywords
- temporary
- perforation
- plug
- temporary plug
- fracturing
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Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000000903 blocking effect Effects 0.000 title description 14
- 238000005086 pumping Methods 0.000 claims abstract description 7
- 238000010276 construction Methods 0.000 claims abstract description 5
- 239000012530 fluid Substances 0.000 claims abstract description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 239000002657 fibrous material Substances 0.000 claims description 3
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000002131 composite material Substances 0.000 abstract description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
Images
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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/134—Bridging 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
- 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
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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)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a temporary plugging method for large-scale underground fracturing holes, which comprises temporary plugging and a using method, wherein the middle part of the temporary plugging is in a knot shape, and two ends of the temporary plugging are divided into a plurality of filaments; the using method comprises the following steps: step 1, performing fracturing construction after horizontal section perforation; pumping the temporary plug into the well, wherein the temporary plug preferentially enters the pressed perforation under the action of pressure, and transferring fracturing fluid and propping agent to the unpressed perforation, so that all the perforations are cracked with high quality, and finally, all the perforation are temporarily plugged; step 3, carrying out subsequent processes after the temporary blockage is degraded; the invention combines a plurality of perforation sections into one section without using a composite bridge plug of pumping perforation, thereby greatly reducing the frequency of cable downhole; the use of temporary plugs ensures uniform fracturing of all perforation clusters throughout the length of the perforation interval.
Description
Technical Field
The invention relates to the technical field of petroleum fracturing, in particular to a temporary plugging method for a large-scale underground fracturing hole.
Background
The horizontal well staged fracturing cost is huge, the operation time is long, in the using process of a drillable bridge plug, the bridge plug is set in advance due to the fact that a casing damage sleeve is changed and enters and is blocked, drilling and grinding of the fractured bridge plug are time-consuming and labor-consuming, and the residual fragments of the bridge plug bring great risks to a shaft and ground equipment; the temporary plugging agent is expensive, and each section of 60-200Kg of temporary plugging agent has great damage to the stratum after degradation; the temporary blocking particles are few or even have no position control, and the particles are temporarily blocked and accumulated in the horizontal section, so that the temporary blocking of the upper hole is easy to cause. And many methods have low pressure bearing levels.
Therefore, a method for temporarily blocking a large-scale downhole fracturing hole is a problem to be solved.
Disclosure of Invention
The invention aims to provide a novel temporary plug which is designed into a rope knot structure and is used for fracturing temporary plug of a horizontal segment oil-gas layer with the length of more than 2000m, and fracturing operation can be completed better in shorter time with less cost; and the old well can be temporarily plugged aiming at the poor fracturing effect of the old well, so that the repeated fracturing of the old well is realized.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: a method for temporarily blocking a large-scale underground fracturing hole comprises temporary blocking and a using method, wherein the middle part of the temporary blocking is in a knot shape, and two ends of the temporary blocking are divided into a plurality of filaments;
the using method comprises the following steps:
step 1, performing fracturing construction after horizontal section perforation;
pumping the temporary plug into the well, wherein the temporary plug preferentially enters the pressed perforation under the action of pressure, and transferring fracturing fluid and propping agent to the unpressed perforation, so that all the perforations are cracked with high quality, and finally, all the perforation are temporarily plugged;
and 3, carrying out subsequent processes after the temporary blockage is degraded.
Further, the short-term pressure bearing of the temporary plug is 70MPa, and the tensile strength is more than 120 MPa.
Further, the temporary plug is made of degradable fiber materials.
Further, the temporary plug is completely degraded at 40-180 ℃, has no residue after being degraded, and is degraded into carbon dioxide and water by 100%.
Compared with the prior art, the invention has the advantages that:
1. because the composite bridge plug of pumping perforation is not used, a plurality of perforation sections are combined into one section, and the frequency of cable downhole is greatly reduced;
2. in the whole length range of the perforation section, the temporary plugging is used to ensure that all perforation clusters are uniformly fractured;
3. the perforation clusters can be in the best productivity efficiency by using the shunt temporary plugging technology, and each perforation segment is perfectly fractured without leaving any uncracked isolated perforation clusters;
4. the temporary plugging material replaces a composite bridge plug, and particularly aims at perforation and fracturing operations of large-displacement horizontal sections which cannot be reached by oil pipes;
5. reducing or replacing drillable (soluble) bridge plugs, saving over 40 million dollars per well;
6. the working hours of single well operation are saved by more than 50%.
Drawings
FIG. 1 is a schematic illustration of a temporary plugging configuration for a method of the present invention for large scale downhole fracture hole temporary plugging.
FIG. 2 is a schematic downhole fracture view of a method of the present invention for large scale downhole fracture hole plugging.
Detailed Description
A method for large scale downhole frac hole plugging according to the present invention is described in further detail below with reference to the accompanying drawings.
The present invention will be described in detail with reference to the accompanying fig. 1-2.
A method for temporarily blocking a large-scale underground fracturing hole comprises temporary blocking and a using method, wherein the middle part of the temporary blocking is in a knot shape, and two ends of the temporary blocking are divided into a plurality of filaments;
the using method comprises the following steps:
step 1, performing fracturing construction after horizontal section perforation;
pumping the temporary plug into the well, wherein the temporary plug preferentially enters the pressed perforation under the action of pressure, and transferring fracturing fluid and propping agent to the unpressed perforation, so that all the perforations are cracked with high quality, and finally, all the perforation are temporarily plugged;
and 3, carrying out subsequent processes after the temporary blockage is degraded.
The temporary plug has a short-term pressure bearing of 70MPa and a tensile strength of more than 120 MPa.
The temporary plug is made of degradable fiber materials.
The temporary plug is completely degraded at 40-180 ℃, no residue is generated after the temporary plug is completely degraded, and 100% of temporary plug is degraded into carbon dioxide and water.
The specific implementation process of the method for temporarily blocking the large-scale underground fracturing hole comprises the following steps:
performing fracturing construction after horizontal section perforation; pumping temporary plugs into a well, wherein the temporary plugs preferentially enter the pressed perforation holes under the action of pressure, transferring fracturing fluid and propping agent to the non-pressed perforation holes, enabling all perforation holes to crack in a high-quality manner, and finally temporarily plugging all perforation holes; according to the material proportion, the temporary plugging can complete the degradation within corresponding time, and the subsequent procedures are carried out after the degradation.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. A method for temporary plugging of a large scale downhole frac hole, comprising: the temporary plug is in a knot shape in the middle and is divided into a plurality of filaments at two ends;
the using method comprises the following steps:
step 1, performing fracturing construction after horizontal section perforation;
pumping the temporary plug into the well, wherein the temporary plug preferentially enters the pressed perforation under the action of pressure, and transferring fracturing fluid and propping agent to the unpressed perforation, so that all the perforations are cracked with high quality, and finally, all the perforation are temporarily plugged;
and 3, carrying out subsequent processes after the temporary blockage is degraded.
2. A method for large scale downhole fracture aperture plugging according to claim 1, wherein: the temporary plug has a short-term pressure bearing of 70MPa and a tensile strength of more than 120 MPa.
3. A method for large scale downhole fracture aperture plugging according to claim 2, wherein: the temporary plug is made of degradable fiber materials.
4. A method for large scale downhole fracture aperture plugging according to claim 3, wherein: the temporary plug is completely degraded at 40-180 ℃, no residue is generated after the temporary plug is completely degraded, and 100% of temporary plug is degraded into carbon dioxide and water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011579941.7A CN112647892A (en) | 2020-12-28 | 2020-12-28 | Method for temporarily blocking large-scale underground fracturing hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011579941.7A CN112647892A (en) | 2020-12-28 | 2020-12-28 | Method for temporarily blocking large-scale underground fracturing hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112647892A true CN112647892A (en) | 2021-04-13 |
Family
ID=75363305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011579941.7A Pending CN112647892A (en) | 2020-12-28 | 2020-12-28 | Method for temporarily blocking large-scale underground fracturing hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112647892A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113201855A (en) * | 2021-05-13 | 2021-08-03 | 四川捷贝通能源科技有限公司 | Full-degradable high-strength temporary knot plug |
| CN113445979A (en) * | 2021-07-06 | 2021-09-28 | 古莱特科技股份有限公司 | Rope knot temporary plugging ball for staged fracturing of oil and gas field, method and application |
| CN113586024A (en) * | 2021-08-02 | 2021-11-02 | 重庆双标石油工程技术服务有限公司 | Method for temporarily blocking fractured reservoir by using soluble polymer biological knots |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080200352A1 (en) * | 2004-09-01 | 2008-08-21 | Willberg Dean M | Degradable Material Assisted Diversion or Isolation |
| CA2658472A1 (en) * | 2009-03-13 | 2010-09-13 | Bj Services Company Canada | Plug and related methods for isolating open perforations in horizontal wellbores using ultra lightweight proppant and soluble material |
| US20170260828A1 (en) * | 2015-04-28 | 2017-09-14 | Thru Tubing Solutions, Inc. | Flow control in subterranean wells |
| US20170292343A1 (en) * | 2016-04-06 | 2017-10-12 | Thru Tubing Solutions, Inc. | Methods of completing a well and apparatus therefor |
| CN111574979A (en) * | 2020-05-25 | 2020-08-25 | 北京易联结科技发展有限公司 | Temporary plugging agent with tassel-shaped two ends, preparation method and application thereof |
| CN111997560A (en) * | 2020-10-28 | 2020-11-27 | 山东科兴化工有限责任公司 | Completely degradable temporary plug for oil-gas well fracturing and preparation method thereof |
| CN112112616A (en) * | 2019-06-20 | 2020-12-22 | 新奥科技发展有限公司 | High-temperature temporary plugging composition agent, preparation method and application method thereof |
-
2020
- 2020-12-28 CN CN202011579941.7A patent/CN112647892A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080200352A1 (en) * | 2004-09-01 | 2008-08-21 | Willberg Dean M | Degradable Material Assisted Diversion or Isolation |
| CA2658472A1 (en) * | 2009-03-13 | 2010-09-13 | Bj Services Company Canada | Plug and related methods for isolating open perforations in horizontal wellbores using ultra lightweight proppant and soluble material |
| US20170260828A1 (en) * | 2015-04-28 | 2017-09-14 | Thru Tubing Solutions, Inc. | Flow control in subterranean wells |
| US20170292343A1 (en) * | 2016-04-06 | 2017-10-12 | Thru Tubing Solutions, Inc. | Methods of completing a well and apparatus therefor |
| CN112112616A (en) * | 2019-06-20 | 2020-12-22 | 新奥科技发展有限公司 | High-temperature temporary plugging composition agent, preparation method and application method thereof |
| CN111574979A (en) * | 2020-05-25 | 2020-08-25 | 北京易联结科技发展有限公司 | Temporary plugging agent with tassel-shaped two ends, preparation method and application thereof |
| CN111997560A (en) * | 2020-10-28 | 2020-11-27 | 山东科兴化工有限责任公司 | Completely degradable temporary plug for oil-gas well fracturing and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113201855A (en) * | 2021-05-13 | 2021-08-03 | 四川捷贝通能源科技有限公司 | Full-degradable high-strength temporary knot plug |
| CN113445979A (en) * | 2021-07-06 | 2021-09-28 | 古莱特科技股份有限公司 | Rope knot temporary plugging ball for staged fracturing of oil and gas field, method and application |
| CN113586024A (en) * | 2021-08-02 | 2021-11-02 | 重庆双标石油工程技术服务有限公司 | Method for temporarily blocking fractured reservoir by using soluble polymer biological knots |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210413 |
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| RJ01 | Rejection of invention patent application after publication |