CN105756650A - Method for realizing staged fracturing of horizontal well by blocking channelling by adopting mixed temporary blocking agent - Google Patents
Method for realizing staged fracturing of horizontal well by blocking channelling by adopting mixed temporary blocking agent Download PDFInfo
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- CN105756650A CN105756650A CN201610181518.9A CN201610181518A CN105756650A CN 105756650 A CN105756650 A CN 105756650A CN 201610181518 A CN201610181518 A CN 201610181518A CN 105756650 A CN105756650 A CN 105756650A
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000000903 blocking effect Effects 0.000 title claims abstract description 9
- 239000002981 blocking agent Substances 0.000 title abstract 4
- 238000010276 construction Methods 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 49
- 239000012530 fluid Substances 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 7
- 239000011229 interlayer Substances 0.000 claims description 6
- 238000001802 infusion Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000011010 flushing procedure Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 239000004568 cement Substances 0.000 abstract description 6
- 238000011161 development Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- 230000018109 developmental process Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000009466 transformation 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
- 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
- E21B43/261—Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking the formation
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention belongs to the technical field of oil production engineering, and particularly relates to a method for realizing staged fracturing of a horizontal well by blocking channelling by adopting a mixed temporary blocking agent. Temporary blocking agents with different particle sizes and different proportions are squeezed repeatedly in a staged blocking mode; the temporary blocking agents are solidified and slightly expanded and are cemented with a stratum and the sleeve after entering a channelling part of a sleeve of the horizontal well. According to the method, the problem that the construction quality is affected and even normal construction cannot be performed caused by the channelling in a fracturing process because the cementing quality of the cement out of the sleeve after part horizontal wells are cemented is poor is solved, so that a target stratum is effectively transformed, and the development benefit of the horizontal well is improved.
Description
Technical field
The invention belongs to technical field of oil production engineering, be specifically related to a kind of employing and alter, outside mixing diverting agent closure pipe, the method realizing staged fracturing of horizontal well.
Background technology
In recent years, development along with drilling technology, in order to conscientiously improve the economic benefit of oil field development, horizontal well technology has become as a kind of effective means of oil-gas field development, before utilizing horizontal well to carry out oil-gas mining, need horizontal well is transformed, realize oil reservoir and the communication of horizontal well pit shaft, the transformation of oil field at home horizontal well transform master as with segmentation, produce several separate cracks by the mode of staged fracturing and link up oil reservoir and horizontal well pit shaft, thus being finally reached the purpose improving well yield.At present, the staged fracturing work of horizontal well is main adopts the processes such as bridging plug staged fracturing, liquid gum plug staged fracturing, limited entry fracture treatment, water-jet staged fracturing and packer staged fracturing.
But, qualified cementing quality also becomes premise and the key of casing tube well-completion horizontal well staged fracturing.Along with horizontal section length is continuously increased, due to by entering under hole quality, sleeve pipe and the various factors such as situation placed in the middle, property of drilling fluid, drilling process water outlet and Water-Seepage, the outer Cementation Quality of part of horizontal well well cementation rear sleeve is poor, cause that staged fracturing effectively insulates length and shortens and anti-breakthrough, breakdown characteristics step-down, alter outside the easy generator tube of fracturing process affect construction quality even cannot normal construction.The problem of horizontal cementing quality highlights gradually, has become as the key factor of restriction Horizontal Well Drilling completion and follow-up reservoir reconstruction effect.
At present, the outer problem altered of pipe is caused for horizontal cementing is of poor quality, conventional solution is by secondary well cementation, namely cementing quality is defective or cement returns high inadequate well section, by artificial perforations adding borehole, by the annular space of cement sprue bushing Yu well, again form qualified or new cement sheath.
Said method is primarily present following deficiency: easily shrink after theing cement solidifies, and effect duration is short, construction safety poor reliability, and at pit shaft Nei Liusaiduo, plug section is longer, bores plug costly；And when boring plug, sleeve pipe injury is comparatively serious, cement mortar penetration depth is limited, weak effect, it is impossible to form effectively closure.Further, since secondary cementing technology difficulty is big, operation is many, plugging effect is difficult to predict, the cement sheath packing effect being newly formed cannot meet staged fracturing requirement.
Therefore, current urgent need alters, outside a set of effective closure is managed, the method realizing staged fracturing of horizontal well, makes target zone possess staged fracturing condition, normally completes fracturing work.
Summary of the invention
It is an object of the invention to provide a kind of employing and alter, outside mixing diverting agent closure pipe, the method realizing staged fracturing of horizontal well, poor to solve the part of horizontal well outer Cementation Quality of well cementation rear sleeve, cause altering outside fracturing process generator tube affect construction quality even cannot the problem of normal construction, so that target zone is effectively transformed, the development benefit of well of improving the standard.
For this, the invention provides a kind of employing and alter, outside mixing diverting agent closure pipe, the method realizing staged fracturing of horizontal well, diverting agent with the many round squeezing different-grain diameters of slug mode and different proportion, described diverting agent enters after altering groove location outside horizontal well casing pipe, solidify and microdilatancy, cemented together with stratum and sleeve pipe.
A kind of employing alters, outside mixing diverting agent closure pipe, the method realizing staged fracturing of horizontal well, comprises the following steps:
Step 1) use drift size gauge tool drifting: drifting to the artificial bottom of a well of well in operation, the internal diameter of Inspection well whether have deformation or blocking, if well in operation have deformation or blocking, then well workover complete after implement pressure break again；
Step 2) clean pit shaft mechanical admixture；
Step 3) wellbore pressure test；
Enter logger under step 4) employing tubing transmission mode and carry out sound amplitude variable density well logging, detect full well section cementing quality；
Plan fracturing section is carried out perforation by step 5)；
It is the diverting agent of 0.85mm, 2mm, 4mm that step 6) pumps mechanical fraction by fracturing fluid, and mass ratio is 3:1:1, and mixing diverting agent volume fraction in fracturing fluid is 0.15 ~ 0.20；
Open well head after step 7) closing well Hou Ning, continue infusion prepad fluid, if well head pressure reaches more than 30MPa, then show that closure forms the interlayer with higher breakthrough pressure and disruptive pressure, insulate completely between horizontal well perforation section, proceed step 8)；If well head pressure is not up to 30MPa, then re-start step 6)；
Step 8) carries out main pressing crack construction；
Step 9) repeats the 4th) to the 7th) step, the whole interval of fracturing work well；
Step 10) open flow, ask product and completion.
Described diverting agent is oil-soluble temporary plugging agent.
Step 2) described cleaning pit shaft mechanical admixture is not more than 0.2% to returning out content of impurities in flushing fluid.
Step 3) wellbore pressure test process, clear water pressure testing 20MPa, within 5 minutes, pressure is dropped by less than 0.5MPa；Clear water pressure testing 55MPa, within 30 minutes, pressure is dropped by less than 0.7Mpa；If pressure fall exceedes above-mentioned standard, then look for Lou and well workover.
Step 5) adopts hydraulic jet perforation or firepower perforation.
Step 6) then stops infusion when well head pressure rises to 20MPa.
Step 7) in the closing well Hou Ning time be 30 minutes.
Described diverting agent is bridge joint stifled material C DD-3 temporarily.
The invention has the beneficial effects as follows:
The inventive method can solve horizontal well cannot the problem of staged fracturing because the outer Cementation Quality difference of sleeve pipe causes outer the altering of pipe, groove is altered outside diverting agent closure horizontal well tube by mixing, reach to insulate completely between perforated interval, so that target zone possesses staged fracturing condition, normally complete fracturing work.
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Accompanying drawing explanation
Fig. 1 is that the mixing diverting agent that adopts that the embodiment of the present invention provides blocks the method flow diagram altered outside horizontal well tube；
Fig. 2 adopts the present invention to mix the characteristic curve altering and implementing pressing crack construction outside diverting agent closure horizontal well tube.
Detailed description of the invention
Embodiment 1:
Present embodiments provide a kind of employing and alter, outside mixing diverting agent closure pipe, the method realizing staged fracturing of horizontal well, diverting agent with the many round squeezing different-grain diameters of slug mode and different proportion, described diverting agent enters after altering groove location outside horizontal well casing pipe, solidify and microdilatancy, cemented together with stratum and sleeve pipe.
The principle of the invention:
The present invention be for solve part of horizontal well because the outer Cementation Quality difference of sleeve pipe causes outer the altering of pipe cannot the problem of staged fracturing and design, namely before main pressing crack construction, according to pressure testing situation, inject the mixing diverting agent of some and different proportion with the many rounds of slug mode；Mixing diverting agent enters after altering groove location outside horizontal well casing pipe, closing well Hou Ning, solidify and microdilatancy, cemented together with stratum and sleeve pipe, form the interlayer with higher breakthrough pressure and disruptive pressure, play the effect of secondary well cementation, reach to insulate completely between perforated interval, carry out main pressing crack construction afterwards；Repeat the above steps, until completing the whole interval fracturing work of described well in operation.
The method of this staged fracturing of horizontal well that the present embodiment provides improves constantly plugged zone density in altering groove by mixing diverting agent, ultimately form the interlayer with higher breakthrough pressure and disruptive pressure, play the effect of secondary well cementation, reach to insulate completely between perforated interval.
Embodiment 2:
On the basis of embodiment 1, present embodiments provide a kind of mixing diverting agent closure that adopts as shown in Figure 1 and alter, outside managing, the method realizing staged fracturing of horizontal well, comprise the following steps:
Step 1) use drift size gauge tool drifting: drifting to the artificial bottom of a well of well in operation, the internal diameter of Inspection well whether have deformation or blocking, if well in operation have deformation or blocking, then well workover complete after implement pressure break again；
Step 2) clean pit shaft mechanical admixture；
Step 3) wellbore pressure test；
Enter logger under step 4) employing tubing transmission mode and carry out sound amplitude variable density well logging, detect full well section cementing quality；
Plan fracturing section is carried out perforation by step 5)；
It is the diverting agent of 0.85mm, 2mm, 4mm that step 6) pumps mechanical fraction by fracturing fluid, and mass ratio is 3:1:1, and mixing diverting agent volume fraction in fracturing fluid is 0.15 ~ 0.20；
Open well head after step 7) closing well Hou Ning, continue infusion prepad fluid, if well head pressure reaches more than 30MPa, then show that closure forms the interlayer with higher breakthrough pressure and disruptive pressure, insulate completely between horizontal well perforation section, proceed step 8)；If well head pressure is not up to 30MPa, then re-start step 6)；
Step 8) carries out main pressing crack construction；
Step 9) repeats the 4th) to the 7th) step, the whole interval of fracturing work well；
Step 10) open flow, ask product and completion.
Adopt the present invention to mix alter outside diverting agent closure horizontal well tube and implement the characteristic curve of pressing crack construction as shown in Figure 2.
Embodiment 3:
On the basis of embodiment 2, present embodiments provide a kind of employing and alter, outside mixing diverting agent closure pipe, the method realizing staged fracturing of horizontal well, wherein, diverting agent is oil-soluble temporary plugging agent, diverting agent is bridge joint stifled material C DD-3 temporarily in the present embodiment, purchased from CNPC Sichuan Petroleum Geophysical Prospecting Company, Engineering Technology Institute, it is made up of the CDD-3 diverting agent of different-grain diameter 0.85mm, 2mm, 4mm, mass ratio is 3:1:1, and mixing diverting agent volume fraction in fracturing fluid is 0.15 ~ 0.20.The present invention can also use the mixing diverting agent of other types different-grain diameter.
In sum, the inventive method can solve horizontal well cannot the problem of staged fracturing because the outer Cementation Quality difference of sleeve pipe causes outer the altering of pipe, entered after altering groove location outside horizontal well casing pipe by mixing diverting agent, closing well Hou Ning, solidify and microdilatancy, cemented together with stratum and sleeve pipe, form the interlayer with higher breakthrough pressure and disruptive pressure, play the effect of secondary well cementation, reach to insulate completely between perforated interval, so that target zone possesses staged fracturing condition, normally complete fracturing work, the development benefit tool of well of improving the standard is of great significance.
The method of testing that the present embodiment does not describe in detail belongs to the known general knowledge of the industry, does not describe one by one here.
Exemplified as above is only illustration to the present invention, is not intended that the restriction to protection scope of the present invention, every belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (9)
1. one kind adopts mixing diverting agent closure to alter, outside managing, the method realizing staged fracturing of horizontal well, it is characterized in that: with the diverting agent of the many round squeezing different-grain diameters of slug mode and different proportion, described diverting agent enters after altering groove location outside horizontal well casing pipe, solidify and microdilatancy, cemented together with stratum and sleeve pipe.
2. a kind of employing according to claim 1 alters, outside mixing diverting agent closure pipe, the method realizing staged fracturing of horizontal well, it is characterised in that comprise the following steps:
Step 1) use drift size gauge tool drifting: drifting to the artificial bottom of a well of well in operation, the internal diameter of Inspection well whether have deformation or blocking, if well in operation have deformation or blocking, then well workover complete after implement pressure break again；
Step 2) clean pit shaft mechanical admixture；
Step 3) wellbore pressure test；
Enter logger under step 4) employing tubing transmission mode and carry out sound amplitude variable density well logging, detect full well section cementing quality；
Plan fracturing section is carried out perforation by step 5)；
It is the diverting agent of 0.85mm, 2mm, 4mm that step 6) pumps mechanical fraction by fracturing fluid, and mass ratio is 3:1:1, and mixing diverting agent volume fraction in fracturing fluid is 0.15 ~ 0.20；
Open well head after step 7) closing well Hou Ning, continue infusion prepad fluid, if well head pressure reaches more than 30MPa, then show that closure forms the interlayer with higher breakthrough pressure and disruptive pressure, insulate completely between horizontal well perforation section, proceed step 8)；If well head pressure is not up to 30MPa, then re-start step 6)；
Step 8) carries out main pressing crack construction；
Step 9) repeats the 4th) to the 7th) step, the whole interval of fracturing work well；
Step 10) open flow, ask product and completion.
3. a kind of employing according to claim 2 alters, outside mixing diverting agent closure pipe, the method realizing staged fracturing of horizontal well, it is characterised in that: described diverting agent is oil-soluble temporary plugging agent.
4. according to claim 2 a kind of adopt that mixing diverting agent closure pipe is outer alters the method realizing staged fracturing of horizontal well, it is characterised in that: step 2) described cleaning pit shaft mechanical admixture is not more than 0.2% to returning out content of impurities in flushing fluid.
5. a kind of employing according to claim 2 alters, outside mixing diverting agent closure pipe, the method realizing staged fracturing of horizontal well, it is characterised in that: step 3) wellbore pressure test process, clear water pressure testing 20MPa, within 5 minutes, pressure is dropped by less than 0.5MPa；Clear water pressure testing 55MPa, within 30 minutes, pressure is dropped by less than 0.7Mpa；If pressure fall exceedes above-mentioned standard, then look for Lou and well workover.
6. a kind of employing according to claim 2 alters, outside mixing diverting agent closure pipe, the method realizing staged fracturing of horizontal well, it is characterised in that: step 5) adopts hydraulic jet perforation or firepower perforation.
7. a kind of employing according to claim 2 alters, outside mixing diverting agent closure pipe, the method realizing staged fracturing of horizontal well, it is characterised in that: step 6) then stops infusion when well head pressure rises to 20MPa.
8. according to claim 2 a kind of adopt that mixing diverting agent closure pipe is outer alters the method realizing staged fracturing of horizontal well, it is characterised in that: step 7) in the closing well Hou Ning time be 30 minutes.
9. a kind of employing the according to any one of claim 2-8 alters, outside mixing diverting agent closure pipe, the method realizing staged fracturing of horizontal well, it is characterised in that: described diverting agent is bridge joint stifled material C DD-3 temporarily.
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| CN201610181518.9A CN105756650B (en) | 2016-03-28 | 2016-03-28 | It is a kind of that the outer method altered and realize horizontal well fracturing is managed using mixing diverting agent closure |
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| CN201610181518.9A CN105756650B (en) | 2016-03-28 | 2016-03-28 | It is a kind of that the outer method altered and realize horizontal well fracturing is managed using mixing diverting agent closure |
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| CN105756650B CN105756650B (en) | 2018-06-01 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593389A (en) * | 2016-12-22 | 2017-04-26 | 中国石油天然气股份有限公司 | Method for fracturing high-angle naturally-fractured oil reservoir by using permanent plugging agent |
| CN107420081A (en) * | 2017-09-08 | 2017-12-01 | 中国石油天然气股份有限公司 | A kind of fracturing process for realizing the effective partial pressure of fine and close heterogeneous reservoir |
| CN107558980A (en) * | 2017-07-18 | 2018-01-09 | 中国石油天然气股份有限公司 | A kind of low-density, which is temporarily blocked up, suppresses the long extension fracturing process of seam |
| CN107558981A (en) * | 2017-07-18 | 2018-01-09 | 中国石油天然气股份有限公司 | A kind of more the scope of grain size grading temporarily block up the fracturing technology for realizing complex fracture |
| CN109184651A (en) * | 2018-08-31 | 2019-01-11 | 中国石油大学(北京) | Infinite stages fracturing process is temporarily blocked up in water-jet segmentation |
| CN110469308A (en) * | 2019-08-07 | 2019-11-19 | 北京九恒质信能源技术有限公司 | In a kind of straight well seam temporarily stall to fracturing experiments method |
| CN111456701A (en) * | 2020-04-27 | 2020-07-28 | 中国石油天然气股份有限公司 | Fine segmented acidizing method for horizontal well |
| CN112696184A (en) * | 2021-03-24 | 2021-04-23 | 四川省威沃敦化工有限公司 | Fracturing construction method for oil and gas well |
| CN114482912A (en) * | 2020-10-26 | 2022-05-13 | 中国石油化工股份有限公司 | Horizontal well water shutoff agent injection process control method |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593389B (en) * | 2016-12-22 | 2019-05-03 | 中国石油天然气股份有限公司 | A kind of fracturing process for realizing high angle intrinsic fracture oil reservoir using permanent blocking agent |
| CN106593389A (en) * | 2016-12-22 | 2017-04-26 | 中国石油天然气股份有限公司 | Method for fracturing high-angle naturally-fractured oil reservoir by using permanent plugging agent |
| CN107558981B (en) * | 2017-07-18 | 2020-08-07 | 中国石油天然气股份有限公司 | Fracturing process for realizing complex cracks through multi-particle-size-difference temporary plugging |
| CN107558980A (en) * | 2017-07-18 | 2018-01-09 | 中国石油天然气股份有限公司 | A kind of low-density, which is temporarily blocked up, suppresses the long extension fracturing process of seam |
| CN107558981A (en) * | 2017-07-18 | 2018-01-09 | 中国石油天然气股份有限公司 | A kind of more the scope of grain size grading temporarily block up the fracturing technology for realizing complex fracture |
| CN107558980B (en) * | 2017-07-18 | 2020-05-08 | 中国石油天然气股份有限公司 | Low-density temporary plugging crack length-extension-restraining fracturing method |
| CN107420081A (en) * | 2017-09-08 | 2017-12-01 | 中国石油天然气股份有限公司 | A kind of fracturing process for realizing the effective partial pressure of fine and close heterogeneous reservoir |
| CN107420081B (en) * | 2017-09-08 | 2020-07-14 | 中国石油天然气股份有限公司 | Fracturing method for realizing effective partial pressure of compact heterogeneous reservoir |
| CN109184651A (en) * | 2018-08-31 | 2019-01-11 | 中国石油大学(北京) | Infinite stages fracturing process is temporarily blocked up in water-jet segmentation |
| CN110469308A (en) * | 2019-08-07 | 2019-11-19 | 北京九恒质信能源技术有限公司 | In a kind of straight well seam temporarily stall to fracturing experiments method |
| CN111456701A (en) * | 2020-04-27 | 2020-07-28 | 中国石油天然气股份有限公司 | Fine segmented acidizing method for horizontal well |
| CN114482912A (en) * | 2020-10-26 | 2022-05-13 | 中国石油化工股份有限公司 | Horizontal well water shutoff agent injection process control method |
| CN114482912B (en) * | 2020-10-26 | 2024-05-24 | 中国石油化工股份有限公司 | Control method for water shutoff agent injection process of horizontal well |
| CN112696184A (en) * | 2021-03-24 | 2021-04-23 | 四川省威沃敦化工有限公司 | Fracturing construction method for oil and gas well |
| CN112696184B (en) * | 2021-03-24 | 2021-06-22 | 四川省威沃敦化工有限公司 | Fracturing construction method for oil and gas well |
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| CN105756650B (en) | 2018-06-01 |
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