CN108949126A - A kind of Junggar Basin clastic reservoir rock protection drilling fluid - Google Patents
A kind of Junggar Basin clastic reservoir rock protection drilling fluid Download PDFInfo
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- CN108949126A CN108949126A CN201710356119.6A CN201710356119A CN108949126A CN 108949126 A CN108949126 A CN 108949126A CN 201710356119 A CN201710356119 A CN 201710356119A CN 108949126 A CN108949126 A CN 108949126A
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- Prior art keywords
- drilling fluid
- reservoir rock
- junggar basin
- clastic reservoir
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- 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
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/18—Clay-containing compositions characterised by the organic compounds
- C09K8/22—Synthetic organic compounds
- C09K8/24—Polymers
-
- 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
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
-
- 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
- C09K2208/34—Lubricant additives
Abstract
The present invention relates to oil exploration technology fields more particularly to a kind of Junggar Basin clastic reservoir rock to protect drilling fluid, this kind of drilling fluid can form shielded layer on the borehole wall, so that solid phase particles and filtrate be avoided to damage reservoir.A kind of Junggar Basin clastic reservoir rock protection drilling fluid, the following component of weight percent configuration: crack protective agent 2.0%-3.5%；With slurry dose of 4.0%-6.0%；Inhibitor 0.5%-1.0%；Borehole wall stabilizer 2.0%-4.0%；Waterproof lock agent 0.3%-0.8%；Polymer-modified 1.0%-2.5%；Lubricant for drilling fluid 3.0%-8.0%；Remaining ingredient is water.
Description
Technical field
The present invention relates to oil exploration technology fields more particularly to a kind of Junggar Basin clastic reservoir rock to protect drilling well
Liquid.
Background technique
Junggar Basin clastic rock oil-gas Layer belongs to the unconventional compact reservoir of low porosity and low permeability, and liquid phase trap and solid phase often occurs
Particle penetration phenomenon.Wherein, liquid phase trap is the capillary pressure as caused by capillary imbibition effect and liquid phase residual effect
Size it is directly proportional to interfacial tension, be inversely proportional with pore throat radius；Due to the pore-size very little of low permeability reservoir, work as outside fluid
Into when, be just easy to be inhaled into capillary pore, thus generate liquid phase trap injury, block gas channel；Mud solid phase
Particle penetration phenomenon is then since low permeability reservoir pore throat size is small and poor connectivity, and mud solid phase particle is difficult to once invading
It removes.Therefore, it is badly in need of those skilled in the art and a kind of above-mentioned liquid phase trap and solid phase particle intrusion effect of can eliminating is provided
Drilling fluid.
Summary of the invention
Protect drilling fluid the present invention provides a kind of Junggar Basin clastic reservoir rock, this kind of drilling fluid can on the borehole wall shape
At shielded layer, so that solid phase particles and filtrate be avoided to damage reservoir.
In order to solve the above technical problems, present invention employs following technical solutions:
A kind of Junggar Basin clastic reservoir rock protection drilling fluid, including the following component configured by weight percentage:
Crack protective agent 2.0%-3.5%；
With slurry dose of 4.0%-6.0%；
Inhibitor 0.5%-1.0%；
Borehole wall stabilizer 2.0%-4.0%；
Waterproof lock agent 0.3%-0.8%；
Polymer-modified 1.0%-2.5%；
Lubricant for drilling fluid 3.0%-8.0%；
Remaining ingredient is water.
Preferably, crack protective agent is made of with modified natural fibers polymer according to mass ratio 2:1 mixing coarse whiting；It is mixed
Closing coarse whiting is mixed by the coarse whiting of 500,700,900 and 1200 mesh.
Preferably, with slurry dose is made of bentonite and alkalinity regulator 20:1 in mass ratio.
Preferably, inhibitor be organic amine inhibitors, it is amido polyalcohols, polyacrylic acid potassium, any in potassium chloride or appoint
What several combination.
Preferably, borehole wall stabilizer be modified pitch, polylol caving inhibitor, it is any in fluosilicic borehole wall stabilizer or appoint
What several combination.
Preferably, Waterproof lock agent is surfactant, any or any two combination in petroleum sulfonate.
Preferably, polymer-modified by the production of middle petrochemical industry triumph engineering company's drilling technology research institute.
Preferably, lubricant for drilling fluid is silicone oil, white oil, any or any several group in polymeric alcohol lubricant
It closes.
On the other hand, the present invention also provides it is a kind of prepare the Junggar Basin clastic reservoir rock protection drilling fluid method,
Include the following steps:
Each component is configured by weight percent described in claim 1, with slurry dose is added into water, obtains base slurry through abundant aquation；
Inhibitor is added into base slurry, stirs or is recycled to uniformly；
It is added in borehole wall stabilizer, stirs or be recycled to uniformly；
Crack protective agent is added, stirs or is recycled to uniformly；
Be added it is polymer-modified, stir or be recycled to uniformly；
Waterproof lock agent is added, stirs or is recycled to uniformly；
Lubricant for drilling fluid is added, stirs or is recycled to and uniformly protect drilling fluid to get the Junggar Basin clastic reservoir rock.
Junggar Basin clastic reservoir rock protection drilling fluid provided by the invention has the advantages that compared with prior art
This kind of Junggar Basin clastic reservoir rock protection drilling fluid is suitable for the probing of the unconventional compact reservoir of clastic rock low porosity and low permeability, no
Property of drilling fluid is only optimized, and achieved the effect that protect reservoir, improved recovery ratio.It is demonstrated experimentally that clast of the invention
Rock reservoir protection drilling fluid permeability resume figure reaches 90% or more, improves grease by the way that than being greater than 1.2, oily phase breakthrough pressure drops
Low rate reaches 29.7%, and with block, compared with reservoir, initial stage is averaged day fuel-displaced increase 20-25%, water outlet reduces by 50%.
Specific embodiment
Below in conjunction with actual conditions, specific embodiments of the present invention will be described in detail.
At least contain in Junggar Basin clastic reservoir rock protection drilling fluid provided by the invention: a) with slurry dose, b) inhibition
Agent, c) borehole wall stabilizer；In addition, further containing: d) Waterproof lock agent, e) crack protective agent, it is f) polymer-modified and g) bore
Well liquid lubricant.Wherein, b) for inhibitor for preventing filtrate from entering reservoir generation clay swell, blocking oil gas is logical in above-mentioned component
Road；C) borehole wall stabilizer is used to improve the stability of shale formation；D) Waterproof lock agent is for preventing liquid phase trap to reservoir damage；
E) crack protective agent can be released efficiently when preventing solid phase particles from injuring reservoir, while going into operation for blocking reservoir micro-fractures；F) change
Property polymer be used to improve the grease of mud cake and pass through ratio；G) lubricant for drilling fluid guarantees drilling construction for improving lubricity
Safety.
Embodiment one:
It is prepared by following component proportion and generates Junggar Basin clastic reservoir rock protection drilling fluid:
With slurry dose of 5% is added in Xiang Shuizhong, and base slurry is formed after abundant aquation；0.5% potassium chloride, 0.3% table are added sequentially into base slurry
Face activating agent, 2.0% crack protective agent, 1.0% polymer-modified, 2.0% polylol caving inhibitor, 3.0% white oil, stir evenly preparation
It forms.Its performance is apparent viscosity 32mPas, yield value 10.5Pa, API dehydration 4.8ml, permeability resume figure after tested
91.78%, grease passes through than 1.31.As a kind of more preferred embodiment, crack protective agent is by mixing coarse whiting and modified day
Right fibre-forming polymer is constituted according to mass ratio 2:1；Mixing coarse whiting is mixed by the coarse whiting of 500,700,900 and 1200 mesh；
With slurry dose is made of bentonite and alkalinity regulator 20:1 in mass ratio.
Wherein, calculating measuring method used by permeability resume figure specifically can be described as follows:
Using JHMD dynamic core flooding test device (middle petrochemical industry triumph engineering company's drilling technology research institute develops), choose quasi-
Gaer Basin Central clastic reservoir rock rock core；It will be dried after these rock core oil washings and evacuate saturation；Measure rock core oleic permeability
Ko；Then above-mentioned drilling fluid is recycled under the conditions of 90 DEG C of temperature, pressure 3.5MPa, is polluted 6 hours；Rock core oil phase after measurement pollution
Permeability Kd, and calculate permeability resume figure f.
f=Kd/Ko 100% (1)
In formula:
KoInitial rock core oleic permeability, millidarcy；
KdRock core oleic permeability after drilling fluid contamination, millidarcy；
F- permeability resume figure.
And grease than measuring method by then specifically can be described as follows:
It is separately added into the reservoir protection drilling fluid in two GGS42-2 type high pressure high temperature filter testers, in 3.5MPa pressure difference, centainly
Temperatures take 30min to obtain mud cake, are separately added into water, kerosene after rinsing false filter cake, count at the identical temperature of 2.1MPa pressure difference
Measure the water volume Vw, oil volume Vo for passing through mud cake in 30min.
Grease passes through than=Vo/Vw (2)
In formula:
Volume of the Vw- by the oil of mud cake, milliliter；
Volume of the Vo- by the water of mud cake, milliliter.
Embodiment two:
It is prepared by following component proportion and generates Junggar Basin clastic reservoir rock protection drilling fluid:
With slurry dose of 5% is added in Xiang Shuizhong, and base slurry is formed after abundant aquation；0.8% amido polyalcohols, 0.5% are added sequentially into base slurry
Surfactant, 3.0% crack protective agent, 2.0% polymer-modified, 2.0% fluosilicic borehole wall stabilizer, 3.0% silicone oil, stir evenly
Be formulated, performance be apparent viscosity 30mPas, yield value 8Pa, API dehydration 5.2ml, permeability resume figure 95.04%,
Grease passes through than 2.33.
Embodiment three:
It is prepared by following component proportion and generates Junggar Basin clastic reservoir rock protection drilling fluid:
With slurry dose of 5% is added in Xiang Shuizhong, and base slurry is formed after abundant aquation；To base slurry in be added sequentially 1.0% organic amine inhibitors,
Amido polyalcohols, potassium chloride mixture (wherein, organic amine inhibitors, amido polyalcohols, potassium chloride mixed proportion be 1:0.8:
1.2), 0.5% surfactant, 3.5% crack protective agent, 2.0% polymer-modified, 3.0% modified pitch, fluosilicic borehole wall stabilizer
Mixture (wherein, modified pitch, fluosilicic borehole wall stabilizer mixed proportion be 1:1.8), 5.0% polymeric alcohol lubricant, stirring
It is uniformly formulated, performance is apparent viscosity 34mPas, yield value 11Pa, API dehydration 5.6ml, permeability resume figure
92.71%, grease passes through than 2.16.
Example IV:
It is prepared by following component proportion and generates Junggar Basin clastic reservoir rock protection drilling fluid:
With slurry dose of 5% is added in Xiang Shuizhong, and base slurry is formed after abundant aquation；To base slurry in be added sequentially 1.0% organic amine inhibitors,
Polyacrylic acid potassium mixture (wherein, organic amine inhibitors, polyacrylic acid potassium mixture mixed proportion be 1:1.5), 0.8% stone
Oily sulfonate, 3.5% crack protective agent, 2.0% polymer-modified, 2.5% polylol caving inhibitor, 8.0% white oil, stir evenly preparation
It forms, performance is apparent viscosity 39mPas, yield value 14Pa, API dehydration 6.0ml, permeability resume figure 91.2%, grease
By than 2.2.
Claims (9)
1. a kind of Junggar Basin clastic reservoir rock protects drilling fluid, which is characterized in that including configure by weight percentage as
Lower component:
Crack protective agent 2.0%-3.5%；
With slurry dose of 4.0%-6.0%；
Inhibitor 0.5%-1.0%；
Borehole wall stabilizer 2.0%-4.0%；
Waterproof lock agent 0.3%-0.8%；
Polymer-modified 1.0%-2.5%；
Lubricant for drilling fluid 3.0%-8.0%；
Remaining ingredient is water.
2. a kind of Junggar Basin clastic reservoir rock according to claim 1 protects drilling fluid, which is characterized in that crack is protected
Protecting agent is made of with modified natural fibers polymer according to mass ratio 2:1 mixing coarse whiting；Mixing coarse whiting is by 500,700,900
And 1200 the coarse whiting of mesh mix.
3. a kind of Junggar Basin clastic reservoir rock according to claim 1 protects drilling fluid, which is characterized in that with slurry dose
It is to be made of bentonite and alkalinity regulator 20:1 in mass ratio.
4. a kind of Junggar Basin clastic reservoir rock according to claim 1 protects drilling fluid, which is characterized in that inhibitor
It is organic amine inhibitors, amido polyalcohols, polyacrylic acid potassium, any or any several combination in potassium chloride.
5. a kind of Junggar Basin clastic reservoir rock according to claim 1 protects drilling fluid, which is characterized in that the borehole wall is steady
Determining agent is modified pitch, polylol caving inhibitor, any or any several combination in fluosilicic borehole wall stabilizer.
6. a kind of Junggar Basin clastic reservoir rock according to claim 1 protects drilling fluid, which is characterized in that Waterproof lock
Agent is surfactant, any or any two combination in petroleum sulfonate.
7. a kind of Junggar Basin clastic reservoir rock according to claim 1 protects drilling fluid, which is characterized in that modified poly-
Object is closed by the production of middle petrochemical industry triumph engineering company's drilling technology research institute.
8. a kind of Junggar Basin clastic reservoir rock according to claim 1 protects drilling fluid, which is characterized in that drilling fluid
Lubricant is silicone oil, white oil, any or any several combination in polymeric alcohol lubricant.
9. a kind of method for preparing Junggar Basin clastic reservoir rock protection drilling fluid, which comprises the steps of:
Each component is configured by weight percent described in claim 1, with slurry dose is added into water, obtains base slurry through abundant aquation；
Inhibitor is added into base slurry, stirs or is recycled to uniformly；
It is added in borehole wall stabilizer, stirs or be recycled to uniformly；
Crack protective agent is added, stirs or is recycled to uniformly；
Be added it is polymer-modified, stir or be recycled to uniformly；
Waterproof lock agent is added, stirs or is recycled to uniformly；
Lubricant for drilling fluid is added, stirs or is recycled to and uniformly protect drilling fluid to get the Junggar Basin clastic reservoir rock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710356119.6A CN108949126A (en) | 2017-05-19 | 2017-05-19 | A kind of Junggar Basin clastic reservoir rock protection drilling fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710356119.6A CN108949126A (en) | 2017-05-19 | 2017-05-19 | A kind of Junggar Basin clastic reservoir rock protection drilling fluid |
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| Publication Number | Publication Date |
|---|---|
| CN108949126A true CN108949126A (en) | 2018-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710356119.6A Pending CN108949126A (en) | 2017-05-19 | 2017-05-19 | A kind of Junggar Basin clastic reservoir rock protection drilling fluid |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1432620A (en) * | 2002-01-14 | 2003-07-30 | 中国石油化工股份有限公司 | Temporary leakage-stopping agent for well drilling shielding and its application |
| CN102477288A (en) * | 2010-11-22 | 2012-05-30 | 中国石油大学(北京) | Well drilling and completion fluid for oil-gas reservoir protection |
| CN103509125A (en) * | 2012-06-21 | 2014-01-15 | 中国石油化工股份有限公司 | Preparation method for hydrophobically modified carboxymethyl starch used for drilling fluid |
| CN104610940A (en) * | 2014-12-31 | 2015-05-13 | 中国石油天然气集团公司 | Low-damage reservoir protection drilling fluid and preparation method thereof |
| CN104629094A (en) * | 2013-11-07 | 2015-05-20 | 中国石油化工集团公司 | Hydrophobic starch-nanometer calcium carbonate compound and preparation method thereof |
| CN105400501A (en) * | 2015-11-10 | 2016-03-16 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Drilling fluid with strong wall protecting property for narrow-density windows |
-
2017
- 2017-05-19 CN CN201710356119.6A patent/CN108949126A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1432620A (en) * | 2002-01-14 | 2003-07-30 | 中国石油化工股份有限公司 | Temporary leakage-stopping agent for well drilling shielding and its application |
| CN102477288A (en) * | 2010-11-22 | 2012-05-30 | 中国石油大学(北京) | Well drilling and completion fluid for oil-gas reservoir protection |
| CN103509125A (en) * | 2012-06-21 | 2014-01-15 | 中国石油化工股份有限公司 | Preparation method for hydrophobically modified carboxymethyl starch used for drilling fluid |
| CN104629094A (en) * | 2013-11-07 | 2015-05-20 | 中国石油化工集团公司 | Hydrophobic starch-nanometer calcium carbonate compound and preparation method thereof |
| CN104610940A (en) * | 2014-12-31 | 2015-05-13 | 中国石油天然气集团公司 | Low-damage reservoir protection drilling fluid and preparation method thereof |
| CN105400501A (en) * | 2015-11-10 | 2016-03-16 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Drilling fluid with strong wall protecting property for narrow-density windows |
Non-Patent Citations (1)
| Title |
|---|
| 蒋官澄等: "《疏松砂岩油藏保护新技术》", 30 April 2006, 中国石油大学出版社 * |
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Application publication date: 20181207 |