CN109488249A - Prevent leak-stopping cement mortar by stratum or the diluted method of wellbore fluids - Google Patents
Prevent leak-stopping cement mortar by stratum or the diluted method of wellbore fluids Download PDFInfo
- Publication number
- CN109488249A CN109488249A CN201811282955.5A CN201811282955A CN109488249A CN 109488249 A CN109488249 A CN 109488249A CN 201811282955 A CN201811282955 A CN 201811282955A CN 109488249 A CN109488249 A CN 109488249A
- Authority
- CN
- China
- Prior art keywords
- leak
- cement mortar
- stopping
- drilling fluid
- density
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000012530 fluid Substances 0.000 title claims abstract description 44
- 239000011083 cement mortar Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005553 drilling Methods 0.000 claims abstract description 35
- 238000010276 construction Methods 0.000 claims abstract description 15
- 230000000903 blocking effect Effects 0.000 claims abstract description 10
- 239000004568 cement Substances 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 238000002955 isolation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 206010018852 Haematoma Diseases 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
Landscapes
- 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)
- Earth Drilling (AREA)
Abstract
The present invention relates to one kind to prevent leak-stopping cement mortar by stratum or the diluted method of wellbore fluids, it include: in blocking construction operation, the high density high viscosity drilling fluid that density is higher than leak-stopping cement mortar is injected first into pit shaft, the low density drilling fluid in pit shaft is replaced, leak-stopping cement mortar is reinjected and carries out plugging operations.Leak-stopping cement mortar is diluted caused by the present invention can effectively prevent because of density contrast, guarantees that leak-stopping cement mortar can effectively solidify and play the role of leak stopping.
Description
Technical field
The present invention relates to one kind to prevent leak-stopping cement mortar by stratum or the diluted method of wellbore fluids, and it is natural to be applied to petroleum
Pneumatic drill well uses the construction operation of cement slurry leak stopping, is particularly suitable for the well of the severe circulation loss occurred using clay-free drilling fluid.
Background technique
In drilling leakage blockage construction operation, the well of drilling fluid cannot be returned out for well head, it will usually reduce drilling fluid density,
It adds pons hematoma agent, carry out leak stopping using the methods of leak-stopping cement mortar.It the use of leak-stopping cement mortar leak stopping is wherein that solution is pernicious
The most effective blocking method of leakage.But in the construction process, leak-stopping cement mortar and formation/wellbore fluid be (such as: water flooding, drilling well
Liquid etc.) contact when, since density contrast is larger, can constantly be diluted so that leak-stopping cement mortar can not solidify, cause using cement slurry
The failure of equal hydraulic materials leak stopping, the success rate of leak stopping be not high.
Summary of the invention
It is an object of the invention to overcome the above problem of the existing technology, providing one kind prevents leak-stopping cement mortar by ground
Layer or the diluted method of wellbore fluids.Leak-stopping cement mortar is diluted caused by the present invention can effectively prevent because of density contrast, is guaranteed stifled
Leak mud can effectively solidify and play the role of leak stopping.
To achieve the above object, The technical solution adopted by the invention is as follows:
One kind prevents leak-stopping cement mortar by stratum or the diluted method of wellbore fluids, it is characterised in that: in blocking construction operation,
The high density high viscosity drilling fluid that density is higher than leak-stopping cement mortar is injected first into pit shaft, replaces the low-density drilling well in pit shaft
Liquid reinjects leak-stopping cement mortar and carries out plugging operations.
The density that one third is injected in the pit shaft is higher than the high density high viscosity drilling fluid of leak-stopping cement mortar.
The high viscosity drilling fluid is the drilling fluid of viscosity > 200s.
Using the present invention has the advantages that
1. leak-stopping cement mortar is diluted caused by this method can effectively prevent because of density contrast, guarantee that leak-stopping cement mortar can effectively solidify
And play the role of leak stopping.
2. using high density drilling fluid can effectively " suspension " leak-stopping cement mortar, prevent cement slurry to be diluted.
3. equally can effectively prevent leak-stopping cement mortar using high viscosity drilling fluid to be diluted.
Specific embodiment
Embodiment 1
One kind prevents leak-stopping cement mortar by stratum or the diluted method of wellbore fluids, comprising: past first in blocking construction operation
The high density high viscosity drilling fluid that density is higher than leak-stopping cement mortar is injected in pit shaft, replaces the low density drilling fluid in pit shaft, then
It injects leak-stopping cement mortar and carries out plugging operations.
The density that one third is injected in the pit shaft is higher than the high density high viscosity drilling fluid of leak-stopping cement mortar.
The high viscosity drilling fluid is the drilling fluid of viscosity > 200s.
Mainly in blocking construction operation, especially with low-density clay-free drilling fluid severe circulation loss occurs for the present invention
Well, first inject density be higher than leak-stopping cement mortar high density high viscosity drilling fluid, replace pit shaft in low density drilling fluid, allow
This high density drilling fluid " suspension " leak-stopping cement mortar, " high viscosity drilling fluid " equally prevents from being diluted, more favorably
In isolation stratum or wellbore fluids.The method can effectively prevent leak-stopping cement mortar in the construction process, caused by preventing because of density contrast
Leak-stopping cement mortar be diluted caused by leak stopping failure or the not high situation of leak stopping success rate.By the method, leak stopping can be made
Construction operation meets blocking construction design requirement, improves cement slurry leak stopping success rate to greatest extent.
Embodiment 2
Existing use leak-stopping cement mortar leak stopping is to solve the most effective blocking method of severe well leakage.But in the construction process, leak stopping
Cement slurry is susceptible to pit shaft or formation fluid dilution, so that leak-stopping cement mortar can not solidify, causes the hydraulicitys material such as cement slurry
Expect the failure of leak stopping, the success rate of leak stopping is not high.
The present invention mainly before blocking construction operation, first injects the high density high viscosity drilling well that density is higher than leak-stopping cement mortar
Liquid replaces the low density drilling fluid in pit shaft, allows this high density drilling fluid " suspension " leak-stopping cement mortar, " high viscosity drilling fluid "
It equally prevents from being diluted, is more advantageous to isolation stratum or wellbore fluids.The method can effectively prevent leak-stopping cement mortar
In the construction process, leak stopping failure or leak stopping success rate caused by preventing the leak-stopping cement mortar because of caused by density contrast to be diluted be not high
The case where.It the composite can be widely applied to the blocking construction operation in oil and gas well drilling, being particularly suitable for upper formation makes
The severe circulation loss occurred with clay-free drilling fluid has extensively application prospect.By testing number in Sichuan-chongqing Region Guang'an structure
Ten mouthfuls of wells, leak stopping success rate are improved from 30% to 75% or more.
Claims (3)
1. one kind prevents leak-stopping cement mortar by stratum or the diluted method of wellbore fluids, it is characterised in that: in blocking construction operation
In, the high density high viscosity drilling fluid that density is higher than leak-stopping cement mortar is injected first into pit shaft, replaces the low-density in pit shaft
Drilling fluid reinjects leak-stopping cement mortar and carries out plugging operations.
2. according to claim 1 prevent leak-stopping cement mortar by stratum or the diluted method of wellbore fluids, it is characterised in that:
The density that one third is injected in the pit shaft is higher than the high density high viscosity drilling fluid of leak-stopping cement mortar.
3. according to claim 2 prevent leak-stopping cement mortar by stratum or the diluted method of wellbore fluids, it is characterised in that:
The high viscosity drilling fluid is the drilling fluid of viscosity > 200s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811282955.5A CN109488249A (en) | 2018-10-31 | 2018-10-31 | Prevent leak-stopping cement mortar by stratum or the diluted method of wellbore fluids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811282955.5A CN109488249A (en) | 2018-10-31 | 2018-10-31 | Prevent leak-stopping cement mortar by stratum or the diluted method of wellbore fluids |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109488249A true CN109488249A (en) | 2019-03-19 |
Family
ID=65693432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811282955.5A Pending CN109488249A (en) | 2018-10-31 | 2018-10-31 | Prevent leak-stopping cement mortar by stratum or the diluted method of wellbore fluids |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109488249A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1709292A1 (en) * | 2003-12-11 | 2006-10-11 | Shell Internationale Researchmaatschappij B.V. | Method of creating a zonal isolation in an underground wellbore |
| CN103396774A (en) * | 2013-08-09 | 2013-11-20 | 西南石油大学 | Plugging agent and preparation method thereof |
| CN105969326A (en) * | 2016-05-13 | 2016-09-28 | 中国石油集团渤海钻探工程有限公司 | Sodium silicate cementing prepad flushing fluid |
| CN107227744A (en) * | 2017-07-28 | 2017-10-03 | 中国水利水电第十工程局有限公司 | A kind of construction method of gushing water shear-zone leak stopping |
| CN108456510A (en) * | 2017-02-20 | 2018-08-28 | 中国石油化工股份有限公司 | A kind of compound pressure-bearing leak stopping slurry, preparation method and construction method |
-
2018
- 2018-10-31 CN CN201811282955.5A patent/CN109488249A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1709292A1 (en) * | 2003-12-11 | 2006-10-11 | Shell Internationale Researchmaatschappij B.V. | Method of creating a zonal isolation in an underground wellbore |
| CN103396774A (en) * | 2013-08-09 | 2013-11-20 | 西南石油大学 | Plugging agent and preparation method thereof |
| CN105969326A (en) * | 2016-05-13 | 2016-09-28 | 中国石油集团渤海钻探工程有限公司 | Sodium silicate cementing prepad flushing fluid |
| CN108456510A (en) * | 2017-02-20 | 2018-08-28 | 中国石油化工股份有限公司 | A kind of compound pressure-bearing leak stopping slurry, preparation method and construction method |
| CN107227744A (en) * | 2017-07-28 | 2017-10-03 | 中国水利水电第十工程局有限公司 | A kind of construction method of gushing water shear-zone leak stopping |
Non-Patent Citations (1)
| Title |
|---|
| 赵婧: ""涉水裂缝堵漏技术室内研究"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190319 |