CN102352224A - Salt-resistant strong-inhibitive reservoir-protecting drilling fluid - Google Patents
Salt-resistant strong-inhibitive reservoir-protecting drilling fluid Download PDFInfo
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- CN102352224A CN102352224A CN2011102613247A CN201110261324A CN102352224A CN 102352224 A CN102352224 A CN 102352224A CN 2011102613247 A CN2011102613247 A CN 2011102613247A CN 201110261324 A CN201110261324 A CN 201110261324A CN 102352224 A CN102352224 A CN 102352224A
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Abstract
The invention relates to a salt-resistant strong-inhibitive reservoir-protecting drilling fluid which comprises the following components in part by weight: 2-4 parts of bentonite, 1-3 parts of salt-resistant clay, 0.1-0.2 part of sodium carbonate, 100 parts of water, 0.4-0.8 part of tackifier ST-MH, 2-3 parts of fluid loss additive KNT, 0.2-0.6 part of shale inhibitor, 2-6 parts of organic composite sylvite BPC, 2-3 parts of bridge additive and 2-3 parts of biological enzyme storage agent. The drilling fluid has strong salt bed resistance, pollution resistance and inhibitive ability.
Description
Technical field
The present invention relates to the used a kind of auxiliary agent in oil drilling field, particularly a kind of anti-salt, strong inhibition, protection reservoir drilling fluid.
Background technology
There is saline bed in the oil field that has in the exploratory development process, severe contamination drilling fluid, the borehole wall peel off and a series of problems such as reservoir seepage.Show that mainly there is big section gypsum-salt bed in top, drilling fluid contamination is serious in the drilling process, and filter loss is big, and rheological is difficult to control; The big section strong water sensitivity mud shale in bottom very easily causes hole shrinkage, peels off because of water-swelling; Reservoir porosity is bigger, continues seepage in the drilling process, drilling fluid and harmful solid phase severe contamination reservoir.
Though common polymer drilling fluid, undersaturation/saturated salt-water drilling fluid system saline-alkaline tolerance are stronger, its suppress mud shale expansion, undergauge, protection reservoir ability a little less than, can't solve fundamentally that saline bed pollutes, problems such as the borehole wall peels off, reservoir protection; Though invert mud can address the above problem, because the stratum seepage can cause a large amount of loss of drilling fluid to making cost too high, and contaminate environment and reservoir protection are effective.
Summary of the invention
In order to solve the deficiency that exists in the background technology, the purpose of this invention is to provide a kind of anti-salt, strong inhibition, protection reservoir drilling fluid, this drilling fluid antisalt layer pollution capacity is strong, strong inhibition capability.
The technical scheme that the present invention adopts is: this anti-salt; The strong inhibition; Protection reservoir drilling fluid comprises following component; Each component is by weight ratio: 2 parts～4 parts of wilkinites; (antisaline soil is the sepiolite group mineral to antisaline soil; Belonging to the moisture aluminium magensium silicate of chain columnar structure, is natural product) 1 part～3 parts; 0.1 part～0.2 part of soda ash; 100 parts in water; Carry 0.4 part～0.8 part of stick ST-MH; 2 parts～3 parts of fluid loss agent KNT; 0.2 part～0.6 part of shale control agent SET-H; 2 parts～6 parts of organic compound sylvite BPC; 2 parts-3 parts of bridging agent MF-II; 2 parts-3 parts of agent CVS are protected in the biological enzyme storage.
The present invention has following beneficial effect: 1) antisalt layer pollution capacity is strong.Because that in the drilling fluid process for preparation, uses is the salt-resistant polymer treatment agent; Polymer molecular chain fully stretches in the process for preparation; Add organic compound sylvite post polymerization thing molecular chain suitably contraction and maintenance controlled aggregation state, and then guaranteed that drilling fluid system bores the stability when meeting gypsum-salt bed.2) strong inhibition capability.Since the AMPS in the drilling fluid system and triglyceride copolymer analog suppressor factor with contain acrylic copolymer, the multiple anionic macromole of humic acids sylvite and be adsorbed on clay particle surface and form and adsorb hydration layer; Improved the zeta-potential of clay thereby increased the mechanical resistance and the electrostatic repulsion forces of clay particle coalescence, suppressed clay water and divided diffusing.3) reservoir protection is effective.New bio enzyme storage guarantor's agent and bridging agent are used, can form the shutoff barrier fast at high permeability formation, improved bearing capacity simultaneously, the biological enzyme storage is protected agent and after completion, is passed through permeability resume figure to be brought up to more than 92% according to calculating from the Degradation de-plugging.
Embodiment:
Below in conjunction with specific embodiment the present invention is further specified:
Embodiment 1, with wilkinite 2 Kg, antisaline soil 1 Kg, soda ash 0.1 Kg, water 100 Kg, propose stick ST-MH 0.8 Kg, fluid loss agent KNT 3 Kg, shale control agent SET-H 0.2 Kg, organic composite salt BPC 3 Kg, bridging agent MF-II 2 Kg and biological enzyme storage and protect agent CVS 2 Kg and mix row to drilling fluid of the present invention.
Embodiment 2, with wilkinite 3 Kg, antisaline soil 1 Kg, soda ash 0.15 Kg, water 100 Kg, propose stick ST-MH 0.6 Kg, fluid loss agent KNT 2 Kg, shale control agent SET-H 0.4 Kg, organic composite salt BPC 2 Kg, bridging agent MF-II 4 Kg and biological enzyme storage and protect agent CVS 2 Kg and mix row to drilling fluid of the present invention.
Embodiment 3, with wilkinite 4 Kg, antisaline soil 3 Kg, soda ash 0.2 Kg, water 100 Kg, propose the storage of stick ST-MH 0.4 Kg, fluid loss agent KNT 2 Kg, shale control agent SET-H 0.6 Kg, organic composite salt BPC 2 Kg, bridging agent MF-II 6 Kg and biological enzyme and protect agent CVS 2 Kg and mix row to drilling fluid of the present invention.
Above-mentioned 3 resulting drilling fluids of embodiment are experimentized experimental result such as following table 1.
Table 1
Embodiment 3 resulting wellbore fluids are tied up to the test in place that Iraq's Rumaila Field has carried out the four-hole well, and its effect is following:
Table 2
Comprehensive above-mentioned instance and relevant data, drilling fluid system of the present invention have good anti-salt, inhibition and protection reservoir ability, can guarantee downhole safety, shorten the cycle of creeping into, improve per-well production.
The used medicament of the foregoing description is available from following company:
| Carry stick ST-MH | Beijing George O'kelly development in science and technology company limited |
| Fluid loss agent KNT | Shandong Yiteng Chemical Co. Ltd. |
| Shale control agent SET-H | Beijing George O'kelly development in science and technology company limited |
| Organic compound sylvite BPC | Henan, Zhengzhou China auxiliary agent company limited |
| Bridging agent MF-II | Shijiazhuang China letter mud auxiliary agent company limited |
| Agent CVS is protected in the biological enzyme storage | Shandong Yiteng Chemical Co. Ltd. |
Claims (2)
- An anti-salt, suppress by force, protection reservoir drilling fluid; Comprise following component, each component by weight ratio: 2 parts～4 parts of wilkinites, 1 part～3 parts of antisaline soils, 0.1 part～0.2 part of soda ash, 100 parts in water, put forward 0.4 part～0.8 part of stick ST-MH, 2 parts～3 parts of fluid loss agent KNT, 0.2 part～0.6 part of shale control agent SET-H, 2 parts～6 parts of organic compound sylvite BPC, 2 parts-3 parts of bridging agent MF-II, 2 parts-3 parts of agent CVS are protected in the biological enzyme storage.
- 2. anti-salt according to claim 1, strong suppress, protection reservoir drilling fluid, it is characterized in that: 3 parts of wilkinites, 1 part of antisaline soil, 0.15 part of soda ash, 100 parts in water, propose 0.6 part of stick ST-MH, 2 parts of fluid loss agent KNT, 0.4 part of shale control agent SET-H, 2 parts of organic composite salt BPC, 4 parts of bridging agent MF-II and biological enzyme storage and protect 2 parts of agent CVS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102613247A CN102352224A (en) | 2011-09-06 | 2011-09-06 | Salt-resistant strong-inhibitive reservoir-protecting drilling fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102613247A CN102352224A (en) | 2011-09-06 | 2011-09-06 | Salt-resistant strong-inhibitive reservoir-protecting drilling fluid |
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| Publication Number | Publication Date |
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| CN102352224A true CN102352224A (en) | 2012-02-15 |
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| CN2011102613247A Pending CN102352224A (en) | 2011-09-06 | 2011-09-06 | Salt-resistant strong-inhibitive reservoir-protecting drilling fluid |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104017550A (en) * | 2014-06-20 | 2014-09-03 | 山东省鲁北地质工程勘察院 | Saturated salt water drilling fluid for deep well salt mine drilling and preparation method of drilling fluid |
| CN104487538A (en) * | 2012-07-18 | 2015-04-01 | 陶氏环球技术有限责任公司 | Mono-quaternary amine alcohols for use as clay and shale inhibition agents for the drilling industry |
| CN105199686A (en) * | 2014-06-17 | 2015-12-30 | 成都棕通石油配件有限公司 | Slurry for salt bed drilling |
| CN105295870A (en) * | 2014-06-17 | 2016-02-03 | 成都棕通石油配件有限公司 | Preparation method of mud for salt formation drilling |
-
2011
- 2011-09-06 CN CN2011102613247A patent/CN102352224A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104487538A (en) * | 2012-07-18 | 2015-04-01 | 陶氏环球技术有限责任公司 | Mono-quaternary amine alcohols for use as clay and shale inhibition agents for the drilling industry |
| CN104487538B (en) * | 2012-07-18 | 2018-06-15 | 陶氏环球技术有限责任公司 | The single cropping amine alcohol of clay and shale control agent as probing industry |
| CN105199686A (en) * | 2014-06-17 | 2015-12-30 | 成都棕通石油配件有限公司 | Slurry for salt bed drilling |
| CN105295870A (en) * | 2014-06-17 | 2016-02-03 | 成都棕通石油配件有限公司 | Preparation method of mud for salt formation drilling |
| CN104017550A (en) * | 2014-06-20 | 2014-09-03 | 山东省鲁北地质工程勘察院 | Saturated salt water drilling fluid for deep well salt mine drilling and preparation method of drilling fluid |
| CN104017550B (en) * | 2014-06-20 | 2016-10-19 | 山东省鲁北地质工程勘察院 | A kind of deep-well salt brine ore deposit probing saturated salt-water drilling fluid and preparation method |
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Application publication date: 20120215 |