CN108049859A - Method for realizing staged fracturing of sidetracking slim hole - Google Patents
Method for realizing staged fracturing of sidetracking slim hole Download PDFInfo
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- CN108049859A CN108049859A CN201711261564.0A CN201711261564A CN108049859A CN 108049859 A CN108049859 A CN 108049859A CN 201711261564 A CN201711261564 A CN 201711261564A CN 108049859 A CN108049859 A CN 108049859A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000835 fiber Substances 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 17
- 238000010276 construction Methods 0.000 claims abstract description 12
- 230000009466 transformation Effects 0.000 claims abstract description 9
- 239000008187 granular material Substances 0.000 claims description 12
- 238000003825 pressing Methods 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 8
- 230000000977 initiatory effect Effects 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 abstract description 3
- 238000005553 drilling Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 17
- 235000013339 cereals Nutrition 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000005406 washing Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 239000009096 changqing Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- 206010010214 Compression fracture Diseases 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000008202 granule composition Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000005311 nuclear magnetism Effects 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000007704 transition 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
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/08—Fiber-containing well treatment fluids
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a method for realizing sectional fracturing of a sidetracking slim hole, which comprises the steps of carrying degradable temporary plugging diverting particles with different particle sizes and specific proportions by fiber fracturing fluid to form diverting clusters, pumping the particles into a shaft with proper discharge capacity in the fracturing construction process, transporting the particles to the vicinity of a perforating section, plugging perforation holes of a high liquid inlet layer section, increasing bottom hole pressure, achieving the opening condition of a new seam, forcing liquid flow and propping agent to enter an interval without liquid inlet and a low liquid inlet layer section, sequentially opening the reservoir layers with different stresses, realizing sectional fracturing and improving the yield of the sidetracking slim hole. The invention realizes 31A/2' -oil pipe (inner diameter 76mm) is used for cementing, completing and sidetrack drilling of the small borehole and staged fracturing; fracturing of all the intervals is completed by one-time construction without stopping a pump, so that construction links are greatly reduced; the fibers carry the steering particles with a specific ratio to form steering clusters, so that the plugging effect is reliable, and the steering success rate is high; the fibers and the steering particles are made of degradable materials, and the transformation effect is not influenced.
Description
Technical field
The invention belongs to oil field compression fracture technical fields, are related to a kind of method for realizing side tracked slim hole staged fracturing, especially
It is a kind of realization 31/2The method of 〞 oil pipes (internal diameter 76mm) well cementation completion side tracked slim hole staged fracturing.
Background technology
Changqing oilfields are comprehensively into the continuously steady production phase, and with the extension of development time, length stops well, stripper well ratio year by year
Increase, oil gas field stable yields difficulty increases.The extra-low permeability oil reservoirs such as Ansai, Jingan County enter mid-later development phase, inspection shaft coring, nuclear-magnetism
The technological means such as well logging, waterflood front test have deepened the understanding of the type oil reservoir remaining oil distribution feature, and result of study shows：
In plane, waterflood front is oval along main pipeline, and water drive mainstream predominant direction washing thickness, oil-water displacement efficiency are higher, with
It and increases with the angle of main flow direction, washing thickness slightly reduces, washing degree is by dying down by force, and oil-water displacement efficiency reduces, water drive
Leading edge is relatively narrow, strong to wash width 60-80m, and lateral more than the 100m remaining oils of waterline are opposite to be enriched with.On longitudinal direction, water drive producing status
It being influenced by anisotropism, the relatively good interval of physical property is main washing interval, and the poor interval of physical property is weak to be washed or do not wash,
Less than 30%, remaining oil is distributed strong washing ratio in interactive.
SIDETRACKING TECHNOLOGY is taped the latent power for residual recoverable reserves with stronger adaptation as stable yields technique agent technology direction
Property, be conducive to fully control, employ remaining oil, improve recovery ratio.Changqing oilfields carried out sidetracking experiment from 1999, experienced and pulled out
Casing, two stages of window sidetracking, certain progress is obtained, but there are still problems.Oil field production casing uses 51/2〞 casings, are opened
It is crept into after window sidetracking using 118mm drill bits, annular clearance is narrow (8.2mm) after 4 〞 integral joint casings of tripping in, and cement sheath is thin, is easily formed
Width transition region causes weak bonding, therefore selects 31/2〞 oil pipes improve by about one time as well cementing casing pipe, annular space area than 4 〞,
It disclosure satisfy that well cementation demand, and material is easy to get.Well logging shows that sidetracked hole longitudinally bores and meets multiple oil reservoirs, and it is to improve to increase transformation hop count
The key of well yield.31/2〞 small casing internal diameters are only 76mm, and staged fracturing tool and string matching are not perfect, can not be realized point
Section pressure break, early period, sidetracked hole well yield still had greater room for improvement based on general pressure break.Therefore, it is necessary to be attacked by technology
It closes, realizes side tracked slim hole staged fracturing.
The content of the invention
The shortcomings that it is an object of the invention to overcome the above-mentioned prior art, provides a kind of realization side tracked slim hole staged fracturing
Method.
In order to achieve the above objectives, the present invention is achieved by the following scheme：
A kind of method for realizing side tracked slim hole staged fracturing, comprises the following steps：
Step 1) is according to different type oil reservoir sidetracked hole electric-log interpretation as a result, determining transformation hop count and perforating site；
Step 2) penetrates perforating gun using small-diameter deep and snaps into row segmenting perforating；
Step 3) calculates different transformation target interval crustal stress distribution situations according to log data, judges that different perforated intervals rise
Split complexity；
Step 4) pressing crack construction carries out the paragraph 1 sand fracturing of most easy crack initiation；
After step 5) paragraph 1 sand fracturing, according to paragraph 1 preforation tunnel number, add in what is carried by fiber fracturing liquid
The diverting material of degradable granule composition；
Step 6) and so on, complete other interval pressing crack constructions.
Further improve of the invention is：
In step 2), bullet uses 60 rifle SDP30HMX12 bullets.
In step 2), ground target practice perforation diameter is 7.8mm, wears depth as 605mm.
In step 5), diverting material, according to 0.6kg/ holes dosage, is added in by fiber fracturing according to paragraph 1 preforation tunnel number
The diverting material that liquid carries, pump note discharge capacity is determined by operation pressure, ensures the boosting space of reserved more than 20MPa.
The volume of fiber fracturing liquid is 1.5m3, concentration 7.2kg/m3。
Diverting material is to be made of the degradable granule of tetra- kinds of grain sizes of 4mm, 3mm, 1mm and 0.5mm.
The grain size of degradable granule is that the quality of the diverting material of 4mm accounts for the 8% of fiber fracturing liquid quality, degradable granule
Grain size is that the quality of the diverting material of 3mm accounts for the 22% of fiber fracturing liquid quality, and degradable granule grain size is the diverting material of 1mm
Quality account for the 40% of fiber fracturing liquid quality, degradable granule grain size is that the quality of the diverting material of 0.5mm accounts for fiber fracturing
The 30% of liquid quality.
Compared with prior art, the invention has the advantages that：
The present invention provides a kind of methods for realizing side tracked slim hole staged fracturing, and specific match somebody with somebody is carried by fiber fracturing liquid
The Degradable temporary stall of the different-grain diameter of ratio is formed to particle and turns to cluster, in pressing crack construction process, be pumped into appropriate discharge capacity
Pit shaft is migrated to perforated interval, blocks high feed liquor interval preforation tunnel, increases bottom pressure, is reached new seam unlocking condition, is compeled
Liquid stream, proppant is made to open the reservoir of different stress successively into non-feed liquor, low feed liquor interval, realize staged fracturing, improve side
Drilling well well yield.
Specific embodiment
The present invention is described in further detail with reference to embodiment：
The method that the present invention realizes side tracked slim hole staged fracturing, comprises the following steps：
Step 1) is according to different type oil reservoir sidetracked hole electric-log interpretation as a result, considering to bore reservoir situation of meeting, note adopts corresponding, water
The factors such as leading edge are driven, determine transformation hop count and perforating site；
Step 2) carries out segmenting perforating using minor diameter deep penetrating bullet (60 rifle SDP30HMX12 bullets), and ground is practiced shooting
It is worn deep up to 605mm up to 7.8mm perforation diameter；
Step 3) calculates different transformation target interval crustal stress distribution situations according to log data, judges that different perforated intervals rise
Split complexity；
Step 4) pressing crack construction carries out the paragraph 1 sand fracturing of most easy crack initiation；
After step 5) paragraph 1 sand fracturing, according to paragraph 1 preforation tunnel number, designed according to 0.6kg/ holes dosage, by
1.5m3Concentration is 7.2kg/m3Fiber fracturing liquid carries, and adds in by the degradable granule of tetra- kinds of grain sizes of 4mm, 3mm, 1mm, 0.5mm
The diverting material of composition, proportioning are 8%, 22%, 40%, 30%, and pump note discharge capacity is determined by operation pressure, is ensured reserved
The boosting space of more than 20MPa.
Step 6) and so on, complete other interval pressing crack constructions.
The principle of the present invention：
Temporarily stifled steering mechanism：Big grain size plays bridge blinding at eyelet, medium grain size it is particles filled in large-size particles it
Between, cluster permeability is reduced, small size particle is filled between other particles and fiber reinforcement, further reduces permeability, fine
Dimension fracturing fluid ensures that each particles are transmitted by proportioning along pit shaft, reduces and turns to particle sedimentation, and ensures that turning to cluster concentrates
Effect.
Turn to particle characteristics：Main component is organic polymer, can generate deformation under pressure, can improve sealing
Performance, degradation time is unrelated with granular size, without residue after degradation, ensures the unimpeded of fluid course.
Embodiment：
Test well stops well for water logging length, and specific method is as follows：
Step 1) uses 520*140 rhombic inverted nini-spot well pattern waterflooding extractions, casing window sidetracking, and the selection of sidetracking target spot is located at
The remaining oil enrichment region of effective displacement is difficult between the lateral 100m of waterline, injection-production well, array pitch is equivalent to and reduces 40m.Well logging display
It bores and meets long by 61, long 62 liang of sets oil-bearing series, using segmenting perforating, staged fracturing, transform 2 sections of hop count, upper 4 meters of perforation segment length, under
3 meters of perforation segment length；
Step 2) carries out segmenting perforating, hole close 16 using minor diameter deep penetrating bullet (60 rifle SDP30HMX12 bullets)
Hole/rice；
Step 3) according to log data calculate it is different transformation target interval crustal stress distribution situations, epimere shale content compared with
Height, physical property is relatively poor, judges the lower relatively easy crack initiation of perforated interval；
Step 4) pressing crack construction carries out the hypomere sand fracturing of easy crack initiation；
After step 5) hypomere sand fracturing, add in by the degradable granule of tetra- kinds of grain sizes of 4mm, 3mm, 1mm, 0.5mm
The common 28.8kg of diverting material (according to 0.6kg/ holes, totally 48 holes calculate) of composition, matches as 8%, 22%, 40%, 30%, by
1.5m3Concentration is 7.2kg/m3Fiber fracturing liquid carries, pump note discharge capacity 1.0m3/ min, operation pressure 12MPa, there is 28MPa at this time
Boosting space.After diversion agent enters preforation tunnel, boost 15.5MPa, apparent broken pressure occurs, technique purpose is realized, in completion
Section pressure break.
The present invention realizes 31/2〞 oil pipes (internal diameter 76mm) well cementation completion side tracked slim hole staged fracturing；Not termination of pumping is once applied
Work completes all interval pressure breaks, and construction link is greatly decreased；Fiber carries the steering particle of specific proportioning, is formed and turns to cluster,
Plugging effect is reliable, and it is high to turn to success rate；Fiber turns to particle using degradation material, does not influence correctional effect.
More than content is merely illustrative of the invention's technical idea, it is impossible to protection scope of the present invention is limited with this, it is every to press
According to technological thought proposed by the present invention, any change done on the basis of technical solution each falls within claims of the present invention
Protection domain within.
Claims (7)
- A kind of 1. method for realizing side tracked slim hole staged fracturing, which is characterized in that comprise the following steps：Step 1) is according to different type oil reservoir sidetracked hole electric-log interpretation as a result, determining transformation hop count and perforating site；Step 2) penetrates perforating gun using small-diameter deep and snaps into row segmenting perforating；Step 3) calculates different transformation target interval crustal stress distribution situations according to log data, judges that different perforated interval crack initiations are difficult Easy degree；Step 4) pressing crack construction carries out the paragraph 1 sand fracturing of most easy crack initiation；After step 5) paragraph 1 sand fracturing, according to paragraph 1 preforation tunnel number, add in and dropped by what fiber fracturing liquid carried Solve the diverting material of particle composition；Step 6) and so on, complete other interval pressing crack constructions.
- 2. the method according to claim 1 for realizing side tracked slim hole staged fracturing, which is characterized in that in step 2), rifle Bullet uses 60 rifle SDP30HMX12 bullets.
- 3. the method according to claim 1 or 2 for realizing side tracked slim hole staged fracturing, which is characterized in that in step 2), Ground target practice perforation diameter is 7.8mm, wears depth as 605mm.
- 4. the method according to claim 1 for realizing side tracked slim hole staged fracturing, which is characterized in that in step 5), turn To material according to paragraph 1 preforation tunnel number, according to 0.6kg/ holes dosage, the diverting material carried by fiber fracturing liquid is added in, is pumped Note discharge capacity is determined by operation pressure, ensures the boosting space of reserved more than 20MPa.
- 5. the method according to claim 4 for realizing side tracked slim hole staged fracturing, which is characterized in that fiber fracturing liquid Volume is 1.5m3, concentration 7.2kg/m3。
- 6. the method according to claim 4 or 5 for realizing side tracked slim hole staged fracturing, which is characterized in that diverting material To be made of the degradable granule of tetra- kinds of grain sizes of 4mm, 3mm, 1mm and 0.5mm.
- 7. the method according to claim 6 for realizing side tracked slim hole staged fracturing, which is characterized in that degradable granule Grain size is that the quality of the diverting material of 4mm accounts for the 8% of fiber fracturing liquid quality, and degradable granule grain size is the diverting material of 3mm Quality account for the 22% of fiber fracturing liquid quality, degradable granule grain size is that the quality of the diverting material of 1mm accounts for fiber fracturing liquid The 40% of quality, degradable granule grain size are that the quality of the diverting material of 0.5mm accounts for the 30% of fiber fracturing liquid quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711261564.0A CN108049859A (en) | 2017-12-04 | 2017-12-04 | Method for realizing staged fracturing of sidetracking slim hole |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711261564.0A CN108049859A (en) | 2017-12-04 | 2017-12-04 | Method for realizing staged fracturing of sidetracking slim hole |
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| CN108049859A true CN108049859A (en) | 2018-05-18 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403943A (en) * | 2018-09-26 | 2019-03-01 | 中国石油天然气股份有限公司 | Staged fracturing method for 3-inch half sidetracking horizontal well |
| CN109723377A (en) * | 2019-01-15 | 2019-05-07 | 陕西延长石油(集团)有限责任公司研究院 | A kind of window sidetracking well barefoot completion reservoir integration remodeling method |
| CN110005388A (en) * | 2019-02-11 | 2019-07-12 | 中国石油天然气股份有限公司 | Fracturing and yield increasing method for 3-inch semi-slim well side drilling of ultra-low permeability oil reservoir |
| CN111219177A (en) * | 2020-03-03 | 2020-06-02 | 中国石油天然气股份有限公司 | Fracturing method for 3-inch half-slim well of ultra-low permeability sandstone reservoir sidetracking horizontal well |
| CN111827997A (en) * | 2020-08-05 | 2020-10-27 | 中国石油天然气股份有限公司 | Exploitation method for improving recovery ratio of low-pressure tight oil reservoir |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403943A (en) * | 2018-09-26 | 2019-03-01 | 中国石油天然气股份有限公司 | Staged fracturing method for 3-inch half sidetracking horizontal well |
| CN109723377A (en) * | 2019-01-15 | 2019-05-07 | 陕西延长石油(集团)有限责任公司研究院 | A kind of window sidetracking well barefoot completion reservoir integration remodeling method |
| CN110005388A (en) * | 2019-02-11 | 2019-07-12 | 中国石油天然气股份有限公司 | Fracturing and yield increasing method for 3-inch semi-slim well side drilling of ultra-low permeability oil reservoir |
| CN110005388B (en) * | 2019-02-11 | 2021-04-30 | 中国石油天然气股份有限公司 | Fracturing and yield increasing method for 3-inch semi-slim well side drilling of ultra-low permeability oil reservoir |
| CN111219177A (en) * | 2020-03-03 | 2020-06-02 | 中国石油天然气股份有限公司 | Fracturing method for 3-inch half-slim well of ultra-low permeability sandstone reservoir sidetracking horizontal well |
| CN111219177B (en) * | 2020-03-03 | 2022-05-10 | 中国石油天然气股份有限公司 | 3-inch and half-small-borehole fracturing method for sidetracking horizontal well of ultra-low permeability sandstone reservoir |
| CN111827997A (en) * | 2020-08-05 | 2020-10-27 | 中国石油天然气股份有限公司 | Exploitation method for improving recovery ratio of low-pressure tight oil reservoir |
| CN111827997B (en) * | 2020-08-05 | 2023-05-26 | 中国石油天然气股份有限公司 | Exploitation method for improving recovery ratio of low-pressure tight oil reservoir |
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Application publication date: 20180518 |