CN102965084A - Impermeable oil layer protective agent - Google Patents
Impermeable oil layer protective agent Download PDFInfo
- Publication number
- CN102965084A CN102965084A CN2012105065925A CN201210506592A CN102965084A CN 102965084 A CN102965084 A CN 102965084A CN 2012105065925 A CN2012105065925 A CN 2012105065925A CN 201210506592 A CN201210506592 A CN 201210506592A CN 102965084 A CN102965084 A CN 102965084A
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- China
- Prior art keywords
- protective agent
- oil layer
- layer protective
- drilling
- agent
- 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.)
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- Earth Drilling (AREA)
- Edible Oils And Fats (AREA)
Abstract
The invention discloses an impermeable oil layer protective agent used in the drilling process of oil fields. The protective agent consists of the following components in percentage by mass: 50-70% of a single pressure sealing agent, 20-30% of sodium humate and 10-20% of sodium carboxymethylcellulose. After the protective agent is added in a drilling solution, zero-permeability, soft, thin and compact filtering cakes are formed on the well wall, so that the filtering loss of the drilling solution is reduced and the functions of stabilizing the well wall and protecting oil and gas layers are achieved.
Description
Technical field
The invention belongs to the oil drilling auxiliary agent, relate to the drilling fluid treatment agent, specifically a kind of for oilfield drilling nothing infiltration oil layer protective agent.
Background technology
In drilling process, can effectively protect hydrocarbon zone, directly affect the success or failure of subsequent job reservoir protection work, finally affect the overall benefit of exploratory development.Its main component of nothing infiltration oil layer protective agent is xylocarp case fibre and heatproof resin; fast, effective to hole and fine fisssure leakage blocking speed; can form rapidly the impermeability mask tape with some strength, stop liquid, solid invasion reservoir, make reservoir exempt from infringement; can significantly reduce the filter loss of mud; do not affect again the rheological property of mud, temperature tolerance is good, is not subjected to Influence of Electrolyte; nontoxic, harmless.
Summary of the invention
The objective of the invention is in the drilling process; the drilling fluid filtrate invaded formation can cause that shale hydration expands; cause hole instability and various down hole problem when serious, bore problems such as to cause formation damage when meeting payzone, provide a kind of without the infiltration oil layer protective agent.
Realize foregoing invention by the following technical solutions, its moiety and each composition quality per-cent are: individual event pressure seal agent 50%-70%, Sodium salts humic acids 20%-30%, Xylo-Mucine 10-20%.
The present invention without the protectant principal feature of infiltration oil reservoir is: without whipability and thickening property, have anti-collapse, lubrication concurrently in the protection oil reservoir.
Embodiment
The present invention will be further described below in conjunction with embodiment.
Embodiment one:
| Title | The agent of individual event pressure seal | Sodium salts humic acids | Xylo-Mucine |
| Proportioning | 50 | 30 | 20 |
Each moiety in this form is mixed and can use according to the mass percent in its proportioning.
Embodiment two:
| Title | The agent of individual event pressure seal | Sodium salts humic acids | Xylo-Mucine |
| Proportioning | 70 | 20 | 10 |
Each moiety in this form is mixed and can use according to the mass percent in its proportioning.
Drilling fluid add this without the infiltration oil layer protective agent after, by forming zero rate of permeation, softness, thin and fine and close filter cake on the borehole wall, reduce the filter loss of drilling fluid, reach wellbore stability, the effect of protection hydrocarbon zone.
Claims (1)
1. one kind is used for oilfield drilling without the infiltration oil layer protective agent, it is characterized in that its moiety and mass percent are: individual event pressure seal agent 50%-70%, Sodium salts humic acids 20%-30%, Xylo-Mucine 10-20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105065925A CN102965084A (en) | 2012-11-27 | 2012-11-27 | Impermeable oil layer protective agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105065925A CN102965084A (en) | 2012-11-27 | 2012-11-27 | Impermeable oil layer protective agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102965084A true CN102965084A (en) | 2013-03-13 |
Family
ID=47795521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105065925A Pending CN102965084A (en) | 2012-11-27 | 2012-11-27 | Impermeable oil layer protective agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102965084A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084875A (en) * | 1992-09-30 | 1994-04-06 | 中南工业大学 | A kind of leakage blocking wall protective processing agent for well drilling |
| US6818596B1 (en) * | 2001-09-19 | 2004-11-16 | James Hayes | Dry mix for water based drilling fluid |
| CN101613595A (en) * | 2009-07-28 | 2009-12-30 | 大庆石油管理局 | Micro-foam drilling fluid |
| CN102676128A (en) * | 2012-05-29 | 2012-09-19 | 嵇玉海 | Special high temperature resistant drilling fluid additive |
-
2012
- 2012-11-27 CN CN2012105065925A patent/CN102965084A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084875A (en) * | 1992-09-30 | 1994-04-06 | 中南工业大学 | A kind of leakage blocking wall protective processing agent for well drilling |
| US6818596B1 (en) * | 2001-09-19 | 2004-11-16 | James Hayes | Dry mix for water based drilling fluid |
| CN101613595A (en) * | 2009-07-28 | 2009-12-30 | 大庆石油管理局 | Micro-foam drilling fluid |
| CN102676128A (en) * | 2012-05-29 | 2012-09-19 | 嵇玉海 | Special high temperature resistant drilling fluid additive |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130313 |