CN105756650B - Method for realizing staged fracturing of horizontal well by adopting mixed temporary plugging agent to block tubular channeling - Google Patents
Method for realizing staged fracturing of horizontal well by adopting mixed temporary plugging agent to block tubular channeling Download PDFInfo
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- CN105756650B CN105756650B CN201610181518.9A CN201610181518A CN105756650B CN 105756650 B CN105756650 B CN 105756650B CN 201610181518 A CN201610181518 A CN 201610181518A CN 105756650 B CN105756650 B CN 105756650B
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000005465 channeling Effects 0.000 title abstract 2
- 238000010276 construction Methods 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 48
- 238000002156 mixing Methods 0.000 claims description 27
- 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
- 230000008569 process Effects 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000011229 interlayer Substances 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 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
- 238000000605 extraction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 230000009466 transformation Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 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
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010998 test method Methods 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)
- 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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention belongs to the technical field of oil extraction engineering, and particularly relates to a method for realizing staged fracturing of a horizontal well by adopting mixed temporary plugging agents to plug off pipe external channeling. The method solves the problem that the construction quality is influenced or even normal construction cannot be realized due to the fact that the cement cementing quality outside the casing is poor after the horizontal well is cemented by part of horizontal wells, so that a target layer is effectively improved, and the development benefit of the horizontal well is improved.
Description
Technical field
The invention belongs to technical field of oil production engineering, and in particular to a kind of to alter realization water using mixing diverting agent closure pipe is outer
The method of horizontal well staged fracturing.
Background technology
In recent years, with the development of drilling technology, in order to improve the economic benefit of oil field development conscientiously, horizontal well technology is
Through becoming a kind of effective means of oil-gas field development, using horizontal well carry out oil-gas mining before, it is necessary to horizontal well into
Row transformation, to realize the communication of oil reservoir and horizontal well pit shaft, the transformation of oil field at home horizontal well to be segmented based on transformation, by point
The mode of section pressure break generates several mutually independent cracks to link up oil reservoir and horizontal well pit shaft, so as to be finally reached raising individual well
The purpose of yield.At present, the staged fracturing work of horizontal well is mainly using bridge plug staged fracturing, liquid gum plug staged fracturing, limit
The processes such as stream method pressure break, water-jet staged fracturing and packer staged fracturing.
However, qualified cementing quality also becomes the premise and key of casing tube well-completion horizontal well staged fracturing.With level
Segment length is continuously increased, due to by hole quality, casing tripping in and situation placed in the middle, property of drilling fluid, drilling process water outlet and water
The many factors such as mud bleed influence, and the outer Cementation Quality of part of horizontal well well cementation rear sleeve is poor, causes staged fracturing effective
Packing length shortens and anti-breakthrough, breakdown characteristics are lower, and being altered outside the easy generator tube of fracturing process, which influences construction quality, even can not
Normal construction.The problem of horizontal cementing quality, gradually highlights, and has become and restricts horizontal well drilling completion and follow-up reservoir reconstruction
An important factor for effect.
At present, for horizontal cementing the problem of causing to alter outside pipe of poor quality, conventional solution be carry out it is secondary solid
Well, i.e., unqualified to cementing quality or cement returns high inadequate well section, by artificial perforations adding borehole, by cement sprue bushing and well
The annular space of eye re-forms qualified or new cement sheath.
The above method is primarily present following deficiency：It is easily shunk after theing cement solidifies, the term of validity is short, construction safety poor reliability,
In pit shaft Nei Liusaiduo, plug section is longer, and it is costly to bore plug；And more serious, cement mortar entrance is injured to casing when boring and filling in
Depth is limited, and effect is poor, it is impossible to form effectively closure.Further, since secondary cementing technology difficulty is big, process is more, plugging effect
It is difficult to predict the cement sheath packing effect newly formed can not meet staged fracturing requirement.
Therefore, currently it is badly in need of a set of effective outer method for altering realization horizontal well fracturing of closure pipe, has target zone
Standby staged fracturing condition, normally completes fracturing work.
The content of the invention
Horizontal well fracturing is realized using outer alter of mixing diverting agent closure pipe it is an object of the invention to provide a kind of
Method, Cementation Quality is poor to solve outside part of horizontal well well cementation rear sleeve, causes to alter influence outside fracturing process generator tube and apply
Working medium amount even can not normal construction the problem of so that target zone is effectively transformed, the development benefit for well of improving the standard.
For this purpose, the present invention provides a kind of blocked using mixing diverting agent to alter the side for realizing horizontal well fracturing outside pipe
Method, the diverting agent of more round squeezing different-grain diameters and different proportion in a manner of slug, the diverting agent enter outside horizontal well casing pipe
After altering groove location, cure simultaneously microdilatancy, it is cemented together with stratum and casing.
It is a kind of that the outer method altered and realize horizontal well fracturing is managed using mixing diverting agent closure, comprise the following steps：
Step 1）Use gauguste cutter drifting：Whether drifting to the artificial bottom of a well of operation well, the internal diameter of Inspection well has change
If either blocking operation well has deformation or blocking to shape, implement pressure break again after well workover is complete；
Step 2）Clean pit shaft mechanical admixture；
Step 3）Wellbore pressure test；
Step 4）Using tubing transmission mode tripping in logger carry out sound amplitude variable density well logging, full well section well cementation matter is detected
Amount；
Step 5）Perforation is carried out to plan fracturing section；
Step 6）The diverting agent that mechanical fraction is 0.85mm, 2mm, 4mm, mass ratio 3 are pumped by fracturing fluid:1:1,
It is 0.15 ~ 0.20 to mix volume fraction of the diverting agent in fracturing fluid；
Step 7）Well head is opened after closing well Hou Ning, continues pump note prepad fluid, if well head pressure reaches more than 30MPa, table
Bright closure forms the interlayer with higher breakthrough pressure and disruptive pressure, insulates completely between horizontal well perforation section, continue into
Row step 8）；If well head pressure is not up to 30MPa, step 6 is re-started）；
Step 8）Carry out main pressing crack construction；
Step 9）Repeat the 4th）To the 7th）Step, fracturing work well whole interval；
Step 10）Open flow asks production and completion.
The diverting agent is oil-soluble temporary plugging agent.
Step 2）The cleaning pit shaft mechanical admixture is not more than 0.2% to content of impurities in flushing fluid is returned out.
Step 3) wellbore pressure test process, clear water pressure testing 20MPa, pressure is dropped by less than 0.5MPa within 5 minutes；Clear water pressure testing
55MPa, pressure is dropped by less than 0.7Mpa within 30 minutes；If pressure fall is more than above-mentioned standard, leakage and well workover are looked for.
Step 5）It is middle to use hydraulic jet perforation or firepower perforation.
Step 6）In when well head pressure rise to 20MPa then stop pump note.
The closing well Hou Ning times are 30 minutes in step 7).
The diverting agent temporarily blocks up material C DD-3 for bridge joint.
The beneficial effects of the invention are as follows：
The method of the present invention can solve horizontal well can not staged fracturing when Cementation Quality difference causes to alter outside pipe outside casing
The problem of, it is blocked by mixing diverting agent and alters slot outside horizontal well tube, reached and insulate completely between perforated interval, so that target zone has
Standby staged fracturing condition, normally completes fracturing work.
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Description of the drawings
Fig. 1 is provided in an embodiment of the present invention using the method flow diagram altered outside mixing diverting agent closure horizontal well tube；
Fig. 2 is to alter using outside present invention mixing diverting agent closure horizontal well tube and implement the indicatrix of pressing crack construction.
Specific embodiment
Embodiment 1：
A kind of method for being blocked using mixing diverting agent and being altered outside pipe and realizing horizontal well fracturing is present embodiments provided, with
The diverting agent of the more round squeezing different-grain diameters of slug mode and different proportion, the diverting agent, which enters outside horizontal well casing pipe, alters groove portion
Behind position, cure simultaneously microdilatancy, it is cemented together with stratum and casing.
The principle of the invention：
The present invention is can not to be segmented pressure due to Cementation Quality difference causes and altered outside pipe outside casing to solve part of horizontal well
The problem of splitting and design, i.e., before main pressing crack construction, according to pressure testing situation, in a manner of slug more rounds injection certain amounts and
The mixing diverting agent of different proportion；Mixing diverting agent enters outside horizontal well casing pipe alter groove location after, closing well Hou Ning cures simultaneously micro- swollen
It is swollen, it is cemented together with stratum and casing, the interlayer with higher breakthrough pressure and disruptive pressure is formed, plays secondary well cementation
Effect, reach and insulate completely between perforated interval, carry out main pressing crack construction afterwards；It repeats the above steps, until completing the work
Industry well whole interval fracturing work.
The method of this horizontal well fracturing provided in this embodiment is existed by mixing diverting agent continuous improvement plugged zone
The density in slot is altered, the interlayer with higher breakthrough pressure and disruptive pressure is ultimately formed, plays the role of secondary well cementation,
Reach and insulate completely between perforated interval.
Embodiment 2：
On the basis of embodiment 1, present embodiments provide a kind of as shown in Figure 1 outer using mixing diverting agent closure pipe
The method for realizing horizontal well fracturing is altered, is comprised the following steps：
Step 1）Use gauguste cutter drifting：Whether drifting to the artificial bottom of a well of operation well, the internal diameter of Inspection well has change
If either blocking operation well has deformation or blocking to shape, implement pressure break again after well workover is complete；
Step 2）Clean pit shaft mechanical admixture；
Step 3）Wellbore pressure test；
Step 4）Using tubing transmission mode tripping in logger carry out sound amplitude variable density well logging, full well section well cementation matter is detected
Amount；
Step 5）Perforation is carried out to plan fracturing section；
Step 6）The diverting agent that mechanical fraction is 0.85mm, 2mm, 4mm, mass ratio 3 are pumped by fracturing fluid:1:1,
It is 0.15 ~ 0.20 to mix volume fraction of the diverting agent in fracturing fluid；
Step 7）Well head is opened after closing well Hou Ning, continues pump note prepad fluid, if well head pressure reaches more than 30MPa, table
Bright closure forms the interlayer with higher breakthrough pressure and disruptive pressure, insulates completely between horizontal well perforation section, continue into
Row step 8）；If well head pressure is not up to 30MPa, step 6 is re-started）；
Step 8）Carry out main pressing crack construction；
Step 9）Repeat the 4th）To the 7th）Step, fracturing work well whole interval；
Step 10）Open flow asks production and completion.
It is altered outside using present invention mixing diverting agent closure horizontal well tube and implements indicatrix such as Fig. 2 institutes of pressing crack construction
Show.
Embodiment 3：
On the basis of embodiment 2, present embodiments provide a kind of blocked using mixing diverting agent and realization level is altered outside pipe
The method of well staged fracturing, wherein, diverting agent is oil-soluble temporary plugging agent, and diverting agent temporarily blocks up material for bridge joint in the present embodiment
CDD-3, purchased from CNPC Sichuan Petroleum Geophysical Prospecting Company, Engineering Technology Institute, by different-grain diameter 0.85mm,
The CDD-3 diverting agents composition of 2mm, 4mm, mass ratio 3:1:1, volume fraction of the mixing diverting agent 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 conclusion the method for the present invention can solve horizontal well can not when Cementation Quality difference causes to alter outside pipe outside casing
The problem of staged fracturing, after entering outside horizontal well casing pipe and alter groove location by mixing diverting agent, closing well Hou Ning cures simultaneously micro- swollen
It is swollen, it is cemented together with stratum and casing, the interlayer with higher breakthrough pressure and disruptive pressure is formed, plays secondary well cementation
Effect, reach and insulate completely between perforated interval, so that target zone possesses staged fracturing condition, normally complete fracturing work,
The development benefit for well of improving the standard is had a very important significance.
The common knowledge for the test method category industry that the present embodiment does not describe in detail, does not describe one by one here.
The foregoing examples are only illustrative of the present invention, does not form the limitation to protection scope of the present invention, all
Be with the present invention it is the same or similar design all belong to the scope of protection of the present invention within.
Claims (8)
1. a kind of manage the outer method altered and realize horizontal well fracturing using mixing diverting agent closure, it is characterised in that：With slug
The diverting agent of the more round squeezing different-grain diameters of mode and different proportion, the diverting agent, which enters outside horizontal well casing pipe, alters groove location
Afterwards, simultaneously microdilatancy is cured, it is cemented together with stratum and casing；Step is as follows：
Step 1）Use gauguste cutter drifting：Drifting to the artificial bottom of a well of operation well, the internal diameter of Inspection well whether have deformation or
Person blocks, if operation well has deformation or blocking, implements pressure break again after well workover is complete；
Step 2）Clean pit shaft mechanical admixture；
Step 3）Wellbore pressure test；
Step 4）Using tubing transmission mode tripping in logger carry out sound amplitude variable density well logging, full well section cementing quality is detected；
Step 5）Perforation is carried out to plan fracturing section；
Step 6）The diverting agent that mechanical fraction is 0.85mm, 2mm, 4mm, mass ratio 3 are pumped by fracturing fluid:1:1, mixing
Volume fraction of the diverting agent in fracturing fluid is 0.15 ~ 0.20；
Step 7）Well head is opened after closing well Hou Ning, continues pump note prepad fluid, if well head pressure reaches more than 30MPa, shows to seal
It is stifled to form the interlayer with higher breakthrough pressure and disruptive pressure, it is insulated completely between horizontal well perforation section, continues to walk
Rapid 8）；If well head pressure is not up to 30MPa, step 6 is re-started）；
Step 8）Carry out main pressing crack construction；
Step 9）Repeat the 4th）To the 7th）Step, fracturing work well whole interval；
Step 10）Open flow asks production and completion.
2. a kind of blocked using mixing diverting agent according to claim 1 alters the side for realizing horizontal well fracturing outside pipe
Method, it is characterised in that：The diverting agent is oil-soluble temporary plugging agent.
3. a kind of blocked using mixing diverting agent according to claim 1 alters the side for realizing horizontal well fracturing outside pipe
Method, it is characterised in that：Step 2）The cleaning pit shaft mechanical admixture is not more than 0.2% to content of impurities in flushing fluid is returned out.
4. a kind of blocked using mixing diverting agent according to claim 1 alters the side for realizing horizontal well fracturing outside pipe
Method, it is characterised in that：Step 3) wellbore pressure test process, clear water pressure testing 20MPa, pressure is dropped by less than 0.5MPa within 5 minutes；Clear water
Pressure testing 55MPa, pressure is dropped by less than 0.7Mpa within 30 minutes；If pressure fall is more than above-mentioned standard, leakage and well workover are looked for.
5. a kind of blocked using mixing diverting agent according to claim 1 alters the side for realizing horizontal well fracturing outside pipe
Method, it is characterised in that：Step 5）It is middle to use hydraulic jet perforation or firepower perforation.
6. a kind of blocked using mixing diverting agent according to claim 1 alters the side for realizing horizontal well fracturing outside pipe
Method, it is characterised in that：Step 6）In when well head pressure rise to 20MPa then stop pump note.
7. a kind of blocked using mixing diverting agent according to claim 1 alters the side for realizing horizontal well fracturing outside pipe
Method, it is characterised in that：The closing well Hou Ning times are 30 minutes in step 7).
8. horizontal well in segments pressure is realized using outer alter of mixing diverting agent closure pipe according to claim 1-7 any one of them is a kind of
The method split, it is characterised in that：The diverting agent temporarily blocks up material C DD-3 for bridge joint.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610181518.9A CN105756650B (en) | 2016-03-28 | 2016-03-28 | Method for realizing staged fracturing of horizontal well by adopting mixed temporary plugging agent to block tubular channeling |
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| CN201610181518.9A CN105756650B (en) | 2016-03-28 | 2016-03-28 | Method for realizing staged fracturing of horizontal well by adopting mixed temporary plugging agent to block tubular channeling |
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| CN105756650A CN105756650A (en) | 2016-07-13 |
| CN105756650B true CN105756650B (en) | 2018-06-01 |
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| CN106593389B (en) * | 2016-12-22 | 2019-05-03 | 中国石油天然气股份有限公司 | Fracturing method for realizing high-angle natural fracture oil reservoir by adopting permanent plugging agent |
| 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 |
| 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 |
| 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 |
| 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 |
| 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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