CN100510314C - Filling and leakage blocking process for cracking leak gravel - Google Patents
Filling and leakage blocking process for cracking leak gravel Download PDFInfo
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- CN100510314C CN100510314C CNB2005101149160A CN200510114916A CN100510314C CN 100510314 C CN100510314 C CN 100510314C CN B2005101149160 A CNB2005101149160 A CN B2005101149160A CN 200510114916 A CN200510114916 A CN 200510114916A CN 100510314 C CN100510314 C CN 100510314C
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- gravel
- leakage
- crack
- leak
- filling
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- 238000005336 cracking Methods 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 title claims description 21
- 230000000903 blocking effect Effects 0.000 title claims description 7
- 239000004568 cement Substances 0.000 claims abstract description 22
- 239000002245 particle Substances 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 abstract description 16
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 239000012530 fluid Substances 0.000 abstract description 2
- 206010028980 Neoplasm Diseases 0.000 abstract 1
- 201000011510 cancer Diseases 0.000 abstract 1
- 230000036210 malignancy Effects 0.000 abstract 1
- 239000008187 granular material Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000004576 sand Substances 0.000 description 5
- 230000002706 hydrostatic effect Effects 0.000 description 4
- 239000008398 formation water Substances 0.000 description 3
- 230000000505 pernicious effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention relates to a plugging technology, especially plugging technology with gravel for cracking leakage. First 2-5t gravel with the uneven grain size is poured and entered gravel with different grade blocks relative crack. Then one drill extends to pull gravel out so that gravel enters into relative crack at the greatest level. Naked drill-stem extends to the position in 20-60m to the top layer of leakage layer and cement is injected. Because gravel is resorted in crack and cement paste flowing further is hindered cement plug is formed. The technology is used to solve extra crack leakage in Luohe formation of Longdong area, especially extra malignancy leakage with leakage amount more than 130 stere per hour, still fluid face less than 150m and bridge plug leakage stoppage so on.
Description
Technical field
What the present invention relates to is leak-stopping technique, particularly about filling and leakage blocking process for cracking leak gravel.
Background technology
River, regional Lip river, east, Gansu Province layer belongs to the macrovoid height and oozes low pressure sand water layer, and well depth is between 750 meters to 1200 meters.Luo He group sand particle is medium sand, fine sand, flour sand, the particle diameter major part is below 250um, the layer leakage of river, Lip river constituted the main force of Gansu Province regional large-scale leakage in east, accounts for more than 80% of large-scale leakage every year on average, and nearly all calamitous leakage all is to occur in river, Lip river layer.There is the abnormal pressure band in river, piece individual areas Lip river, Sector East, Gansu Province layer, and reservoir pressure coefficient is only between 0.76-0.86.By section, western 29-02 well Lip river drop ply is got 3 meters in core, naked eyes can clearly be found out and have horizontal fracture and vertical fracture in the core, having nearly 1 meter in 3 meters cores is the rock core that the not moulding of broken little bulk can't be measured, this section is the drop ply weaker zone, it also is the most active interval of formation water, these two factors just make conventional leak stopping cementing difficulty increase just, become the plug rate extremely low.
Summary of the invention
The purpose of this invention is to provide a kind of filling and leakage blocking process for cracking leak gravel, be used to solve the regional Luo He in east, Gansu Province and organize super-huge fractured leakage, particularly solve wastage greater than 130 cubic metres/hour, hydrostatic level is lower than 150 meters, bridging plug leak stopping, static leak stopping, types of gas filled microbubbles leak stopping, all unconspicuous super-huge pernicious leakage problem of conventional waterflooding mud effect repeatedly.
Technical scheme of the present invention is achieved in that a kind of filling and leakage blocking process for cracking leak gravel of design, selects the uneven gravel of 2-5 ton granularity to pour into from well head earlier, utilizes the size fractionated of gravel particle to enter and the corresponding crack of shutoff; Next then drill bit is stirred gravel, make gravel can farthest enter the crack of corresponding size, then the drill finish bar is to the position cementing apart from drop ply top 20-60 rice down, and gravel is trapped in the crack, hinder cement paste and further run off, formed cement plug to the drop ply depths.
The bearing capacity of described drop ply is greater than 1.5MPa.
Described gravel is a flat.
Described its length range of flat gravel is 3mm-12mm, and width range is 2mm-3mm, and thickness range is 1mm-2mm.
Characteristics of the present invention are: the present invention is applicable to that the regional Luo He in east, Gansu Province organizes super-huge fractured leakage, for wastage greater than 130 cubic metres/hour, hydrostatic level is lower than 150 meters, and bridging plug leak stopping, static leak stopping, types of gas filled microbubbles leak stopping, repeatedly all unconspicuous super-huge pernicious leakage of conventional waterflooding mud effect can adopt gravel to fill leak-stopping technique.Gravel filling leak stopping stake technology is simple.The choosing and selling method that gravel is filled leak-stopping technique is that the uneven gravel of granularity is directly poured into from well head, build bridge in drop ply section top well in order to prevent gravel, also in order to make gravel can farthest enter the crack of corresponding size, guarantee that drop ply has certain intensity and bearing capacity, must next tricone bit or drag bit gravel is stirred.The gravel source is sufficient, purchase, easy to process.The shape of gravel must be processed into tabular but not spherical shape, is in order to make gravel can enter the crack greatly, and guarantees that gravel enters the certain distance of drop ply, prevents from unconfinedly to enter the crack and make drop ply section gravel can't be detained bridge formation.When in the drop ply that formation water enlivens, carrying out cementing practice, gravel is detained at drop ply builds bridge, could form cement plug, also just can make the intensity of cement plug higher.Gravel is filled leak stopping with respect to conventional leak stopping advantage:
1, the possibility of Cheng Sai improves greatly.Greater than 130 cubic metres/hour, hydrostatic level is lower than 150 meters super-huge leakage for wastage, finally still will lean on cementing to solve.Because layer leakage segment length in river, regional Lip river, east, Gansu Province surpasses 5 meters crack property or easy broken formation, the leakage channel connectedness is good, in case leakage takes place entirely for losing the property returned leakage; And there is regional slit band in Luo He group middle and lower part.If adopt conventional cementing (straight cement, light weight cement, thixotroping cement) technology, cement paste is dangerous near along the slit band leakage, may have only energy Cheng Sai in ten times two, three times; Carry out cementing job and use again after gravel is filled leak stopping, only needing once just can Cheng Sai.
2, the cementing strength of drop ply and cement plug improves greatly.The regional Luo He in east, Gansu Province organizes super-huge fractured leakage, because the drop ply slit physically well develops, formation water is active, and the displacement of formation fluid and cement paste is fast in cementing practice.If adopt conventional cementing technology, the intensity of drop ply Cheng Sai is very low, and some also just mixes slurry; And carry out cementing job again after adopting gravel to fill leak stopping, the intensity of drop ply section cement plug just improves greatly.
Description of drawings
The present invention will be further described below in conjunction with the embodiment accompanying drawing.
Fig. 1 is that the embodiment gravel is filled the leak-stopping technique schematic diagram
Among the figure: 1, middle grade gravel, 2, granule level gravel, 3, horizontal fracture, 4, vertical fracture, 5, pit shaft.
The specific embodiment
Embodiment 1 as shown in Figure 1, it is at first at 20 cubic metres of conventional bridging plug leak stopping slurries of last water pot preparation that gravel is filled leak stopping, select grade gravel 1 and granule level gravel 2 in 2 tons then, middle grade gravel 1 length is about 8mm, width is about 2mm, thickness is about 1mm, the length of granule level gravel 2 is about 3mm, pour into by gravel grade size intersection from the empty well well head, utilize the size fractionated of gravel particle to enter and shutoff respective horizontal crack 3 and vertical fracture 4 pour into speed be controlled at per 5 minutes 7 bags, every bag heavy 50 kilograms, turn on pump is sent into continuously simultaneously, prevent gravel swollen live of building bridge in the middle of pit shaft 5, pumpage is adjusted to 10 liters of per seconds, and the whole gravel filling time finished in 30 minutes, following next rock bit or drag bit stirs gravel, make gravel can farthest enter the crack of corresponding size, descend the drill finish bar at last, guarantee the bearing capacity of drop ply is improved more than the 1.5MPa at least to 20 meters apart from the drop ply top position cementing.From regional Lip river, east, nearly 3 years Gansu Province and the super-huge leakage leak stopping example statistics of group, average every mouthful of well needs cementing 6.5 times after using conventional leak-stopping technique, and average every mouthful of well needs cementing 1.25 times after adopting this technology, reduce the cemented number of times of absorption well leak stopping of the same type significantly, improved the leak stopping success rate greatly.
The data information that contrasts with the prior art implementation result after the invention process
| Pound sign | Hydrostatic level | Use conventional | Cementing becomes the plug situation after using conventional leak-stopping technique | Cementing effect after the use gravel filling leak stopping | Economic efficiency contrast |
| Cementing number of times behind the leak-stopping technique | |||||
| West 32-8 | 240 meters | 7 times | Have only effectively Cheng Sai 2 times, return but has bored behind the cement plug mistake once more | Cementing obtains the leak stopping success after adopting this |
This well uses conventional leak-stopping technique to lose 450,000 yuan altogether, and cementing only spends 80,000 yuan after using this technology |
| West 29-1 | 175 |
3 times | Have only effectively Cheng Sai 1 time, return but has bored behind the cement plug mistake once more | Cementing obtains the leak stopping success after adopting this technology 1 time at last | This well uses conventional leak-stopping technique to lose 150,000 yuan altogether, and cementing only spends 40,000 yuan after using this technology |
| West 36-13 | 220 |
4 times | Have only effectively Cheng Sai 1 time, return but has bored behind the cement plug mistake once more | Cementing obtains the leak stopping success after adopting this technology 1 time at last | This well uses conventional leak-stopping technique to lose 210,000 yuan altogether, and cementing only spends 40,000 yuan after using this technology |
| West 204 | 150 |
4 times | Have only effectively Cheng Sai 1 time, return but has bored behind the cement plug mistake once more | Cementing obtains the leak stopping success after adopting this technology 1 time at last | This well uses conventional leak-stopping technique to lose 180,000 yuan altogether, and cementing only spends 40,000 yuan after using this technology |
Claims (2)
1, filling and leakage blocking process for cracking leak gravel selects 2-5 tons of uneven flat gravels of granularity to pour into from well head earlier, utilizes the gravel particle of size fractionated to enter and the corresponding crack of shutoff; Next then three gear wheel rotary heads or drag bit are stirred gravel, make gravel can farthest enter the crack of corresponding size, then down the drill finish bar is to 20-60 meters apart from the drop ply top position cementing, gravel is trapped in the crack, hinder cement paste and further run off, formed cement plug to the drop ply depths.
2, filling and leakage blocking process for cracking leak gravel according to claim 1 is characterized in that: described its length range of flat gravel is 3mm-12mm, and width range is 2mm-3mm, and thickness range is 1mm-2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101149160A CN100510314C (en) | 2005-10-17 | 2005-11-16 | Filling and leakage blocking process for cracking leak gravel |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510096185 | 2005-10-17 | ||
| CN200510096185.1 | 2005-10-17 | ||
| CNB2005101149160A CN100510314C (en) | 2005-10-17 | 2005-11-16 | Filling and leakage blocking process for cracking leak gravel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1928319A CN1928319A (en) | 2007-03-14 |
| CN100510314C true CN100510314C (en) | 2009-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005101149160A Expired - Fee Related CN100510314C (en) | 2005-10-17 | 2005-11-16 | Filling and leakage blocking process for cracking leak gravel |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101525985B (en) * | 2009-04-10 | 2012-06-20 | 中国石油集团川庆钻探工程有限公司川东钻探公司 | Process for plugging bored well by forming cork for plugging |
| US8813873B2 (en) * | 2009-05-29 | 2014-08-26 | Conocophillips Company | Enhanced smear effect fracture plugging process for drilling systems |
| CN102031942B (en) * | 2010-11-30 | 2013-08-28 | 中国石油集团川庆钻探工程有限公司 | On-site construction process of water base barite liquid plugging agent with heat sensitive characteristic |
| CN102278090A (en) * | 2011-08-16 | 2011-12-14 | 中国石油化工股份有限公司 | Method and control system for stopping leakage of reservoir fracture in drilling |
| CN104712287B (en) * | 2015-01-27 | 2017-07-25 | 中国石油集团川庆钻探工程有限公司长庆钻井总公司 | A kind of horizontal well ' Safe Density Windows extended method |
| CN105971555B (en) * | 2016-05-05 | 2019-03-29 | 中国石油集团渤海钻探工程有限公司 | A kind of leak stopping cylinder and plugging slurry joint blocking method for fractured reservoir |
| CN111720091B (en) * | 2019-03-21 | 2022-07-05 | 中国石油天然气股份有限公司 | Method for plugging stratum |
| CN110042840A (en) * | 2019-05-24 | 2019-07-23 | 中水北方勘测设计研究有限责任公司 | A kind of curtain-grouting method of steep dip bulk mosaic texture rock mass |
| CN112253039B (en) * | 2020-10-21 | 2022-08-30 | 中国石油天然气股份有限公司 | Process method for improving chemical plugging resin drilling and plugging efficiency of oil and gas well |
| CN112228003B (en) * | 2020-11-23 | 2022-07-19 | 中国石油大学(华东) | Shaft gravel filling grouting plugging device for drilling vicious leakage |
| CN115354987B (en) * | 2022-09-14 | 2024-01-19 | 贵州大学 | Mine water inrush treatment method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4335788A (en) * | 1980-01-24 | 1982-06-22 | Halliburton Company | Acid dissolvable cements and methods of using the same |
| CN1060136A (en) * | 1991-10-05 | 1992-04-08 | 朝阳市凤凰山建材机械厂 | Cutting seam sieve tube and manufacture method thereof |
| CN1362573A (en) * | 2002-01-26 | 2002-08-07 | 刘丽萍 | Construction mode with full cross-section tunneller |
| US6854521B2 (en) * | 2002-03-19 | 2005-02-15 | Halliburton Energy Services, Inc. | System and method for creating a fluid seal between production tubing and well casing |
-
2005
- 2005-11-16 CN CNB2005101149160A patent/CN100510314C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4335788A (en) * | 1980-01-24 | 1982-06-22 | Halliburton Company | Acid dissolvable cements and methods of using the same |
| CN1060136A (en) * | 1991-10-05 | 1992-04-08 | 朝阳市凤凰山建材机械厂 | Cutting seam sieve tube and manufacture method thereof |
| CN1362573A (en) * | 2002-01-26 | 2002-08-07 | 刘丽萍 | Construction mode with full cross-section tunneller |
| US6854521B2 (en) * | 2002-03-19 | 2005-02-15 | Halliburton Energy Services, Inc. | System and method for creating a fluid seal between production tubing and well casing |
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| CN1928319A (en) | 2007-03-14 |
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Effective date of registration: 20090109 Address after: Shaanxi province Xi'an Weiyang Weiyang Road No. 151 in Changqing Garden District Changqing headquarters and the Ministry of science and technology project post encoding: 710021 Applicant after: CNPC CHUANQING DRILLING ENGINEERING Co.,Ltd. Address before: Department of science and technology, bureau of Exploration Bureau Changqing District, Shaanxi City, Xi'an Province, China: 710021 Applicant before: Changqing Petroleum Exploration Bureau |
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Owner name: CHINA PETROLEUM GROUP CHUANQING DRILLING ENGINEERI Free format text: FORMER OWNER: CHANGQING PETROLEUM EXPLORATION BUREAU Effective date: 20090109 |
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