CN103555295A - Plugging shield agent for drilling fluid - Google Patents

Plugging shield agent for drilling fluid Download PDF

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Publication number
CN103555295A
CN103555295A CN201310568461.4A CN201310568461A CN103555295A CN 103555295 A CN103555295 A CN 103555295A CN 201310568461 A CN201310568461 A CN 201310568461A CN 103555295 A CN103555295 A CN 103555295A
Authority
CN
China
Prior art keywords
calcium carbonate
drilling fluid
plugging
superfine
shield 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.)
Pending
Application number
CN201310568461.4A
Other languages
Chinese (zh)
Inventor
奈世杰
李斌
董建荣
于雷
李波
宋茹
陈艳
丁解放
蒋娟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DONGYING LIFENG CHEMICAL NEW MATERIALS Co Ltd
Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
Original Assignee
DONGYING LIFENG CHEMICAL NEW MATERIALS Co Ltd
Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by DONGYING LIFENG CHEMICAL NEW MATERIALS Co Ltd, Drilling Technology Research Institute of Sinopec Shengli Petroleum Engineering Corp filed Critical DONGYING LIFENG CHEMICAL NEW MATERIALS Co Ltd
Priority to CN201310568461.4A priority Critical patent/CN103555295A/en
Publication of CN103555295A publication Critical patent/CN103555295A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • C09K8/03—Specific additives for general use in well-drilling compositions
    • C09K8/032—Inorganic additives

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

The invention discloses a plugging shield agent for a drilling fluid. The plugging shield agent comprises nano calcium carbonate, superfine 500-mesh calcium carbonate, and superfine 2500-mesh calcium carbonate, wherein the mass ratio of nano calcium carbonate to superfine 500-mesh calcium carbonate to superfine 2500-mesh calcium carbonate is (5-15): (20-60): (10-40). The plugging shield agent can temporarily plug and protect larger pore throats or other pore throats of various sizes effectively, can furthest lower the damage of the drilling fluid to a reservoir stratum with strong anisotropism, can lower the invasion degree of filtrate of the drilling fluid into the stratum, and plays a role in protecting the reservoir stratum.

Description

Drilling fluid shutoff screener
Technical field
The present invention relates to a kind of screener, be specifically related to a kind of drilling fluid shutoff screener.
Background technology
At present, the appropriate design of drilling fluid is to obtain one of gordian technique without injury completion, and the temporary plugging agent particle size of using in drilling fluid is preferably made it to match with stratum pore throat, is the key point of this technology.Temporary shielding method ,barrier building temporary seal incores is wide popularization and application at home, obtains good effect.But this technology is the next preferred temporary plugging agent particle size of average pore throat diameter according to reservoir, therefore being difficult to effective shutoff contributes large large pore throat to hydrocarbon zone rate of permeation, first Kaeuffer is applied to the early-stage Study achievement of coatings industry in petroleum industry, " ideal packing theory " (the Ideal Packing Theory) that has proposed temporary plugging agent particle, is called again d 1/2 (theory, work as the square root of temporary plugging agent particle cumulative volume mark and particle diameter d 1/2) while being directly proportional, can realize the ideal filling of particle.The people such as Hands is according to " ideal filling " theory, further proposed to be convenient to field conduct d 90 rule, when temporary plugging agent particle is on its particle diameter integral distribution curve d 90 when the maximum pore throat diameter of value (referring to that 90% grain diameter is less than this value) and reservoir or maximum crack width equate, can obtain desirable temporarily stifled effect.The method, whole stratum pore throat size is considered; and optimize the one group of complete temporary plugging agent size distribution sequence matching with stratum pore throat; especially consider the outstanding contributions of larger pore throat to rate of permeation in reservoir; can realize larger pore throat and other various size pore throat are carried out to stifled and protection effectively temporarily; can reduce to greatest extent the injury that drilling fluid causes the stronger reservoir of nonuniformity like this; thereby more reasonable in principle, science more.By the analysis to on-the-spot drilling fluid granularity, supplement the temporarily stifled particle of different-grain diameter, make it to meet the rule of ideal filling, reach reduction wellbore liquid leaching loss, reduce the effect that filtrate is invaded.
But there is very large defect in applying at the scene in ideal filling technology at present.It is only the matching problem of having considered ideal filling agent particle and stratum pore throat, does not consider the impact of the granularity of on-the-spot drilling fluid on stowing operation.
Summary of the invention
Object of the present invention is exactly the defect existing for prior art; provide a kind of realization to carry out stifled and protection effectively temporarily to larger pore throat and other various size pore throat; can reduce to greatest extent the injury that drilling fluid causes the stronger reservoir of nonuniformity; can alleviate the degree of drilling fluid filtrate invaded formation, play the drilling fluid shutoff screener of protection reservoir effect.
Its technical scheme is: drilling fluid shutoff screener, comprise nano-calcium carbonate, 500 order calcium carbonate superfine powders and 2500 order calcium carbonate superfine powders, their mass ratio is: nano-calcium carbonate: 500 order calcium carbonate superfine powders: the mass ratio of 2500 order calcium carbonate superfine powders is: 5-15:20-60:10-40.
Wherein best in quality proportioning is: nano-calcium carbonate: 500 order calcium carbonate superfine powders: the mass ratio of 2500 order calcium carbonate superfine powders is: 13:40:25.
The present invention compared with prior art; have the following advantages: the present invention can realize larger pore throat and other various size pore throat are carried out to stifled and protection effectively temporarily; can reduce to greatest extent the injury that drilling fluid causes the stronger reservoir of nonuniformity; can alleviate the degree of drilling fluid filtrate invaded formation, play the effect of protection reservoir.
Embodiment
Drilling fluid shutoff screener, comprise nano-calcium carbonate, 500 order calcium carbonate superfine powders and 2500 order calcium carbonate superfine powders, their mass ratio is: nano-calcium carbonate: 500 order calcium carbonate superfine powders: the mass ratio of 2500 order calcium carbonate superfine powders is: 5-15:20-60:10-40.
Wherein best in quality proportioning is: nano-calcium carbonate: 500 order calcium carbonate superfine powders: the mass ratio of 2500 order calcium carbonate superfine powders is: 13:40:25.
Drilling fluid of the present invention shutoff screener, by thering is the calcium carbonate superfine powder granulometric composition of different meshes, the order number of required calcium carbonate superfine powder and proportioning are determined by target reservoir pore throat radius and rate of permeation, during use, by on-the-spot drilling fluid is carried out to sreen analysis, the granularity of existing drilling fluid is thought of as to a particle diameter sequence of temporary plugging agent, calculating on this basis the needed particle diameter sequence of ideal filling distributes, according to the quality proportioning of above-mentioned raw materials, mixing and stirring, make treatment agent add the rule that can whole meet ideal filling after drilling fluid, reach better effect.
Experimental result is as follows:
On-the-spot property of drilling fluid changes
Simultaneously our tracking monitor ideal filling agent add before and after drilling fluid change of granularity, add the granularity of drilling fluid after ideal filling agent that larger variation has occurred, especially the granule content of < 2 μ m increases greatly, has promoted the plugging effect of drilling fluid to reservoir pore throat.The invention belongs to environmentfriendly products, in production testing process, environmental pollution is little.
Shutoff screener survey report
Interventions Requested Technical indicator Assay
Outward appearance White or light grey powder White powder
Moisture, % ≤2 1
Acid non-soluble substance content, % ≤10 10
API filtration, mL ≤25 22
The present invention can realize larger pore throat and other various size pore throat are carried out to stifled and protection effectively temporarily; can reduce to greatest extent the injury that drilling fluid causes the stronger reservoir of nonuniformity; can alleviate the degree of drilling fluid filtrate invaded formation, play the effect of protection reservoir.

Claims (2)

1. drilling fluid shutoff screener, it is characterized in that: comprise nano-calcium carbonate, 500 order calcium carbonate superfine powders and 2500 order calcium carbonate superfine powders, their mass ratio is: nano-calcium carbonate: 500 order calcium carbonate superfine powders: the mass ratio of 2500 order calcium carbonate superfine powders is: 5-15:20-60:10-40.
2. drilling fluid according to claim 1 shutoff screener, is characterized in that: wherein best in quality proportioning is: nano-calcium carbonate: 500 order calcium carbonate superfine powders: the mass ratio of 2500 order calcium carbonate superfine powders is: 13:40:25.
CN201310568461.4A 2013-11-15 2013-11-15 Plugging shield agent for drilling fluid Pending CN103555295A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310568461.4A CN103555295A (en) 2013-11-15 2013-11-15 Plugging shield agent for drilling fluid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310568461.4A CN103555295A (en) 2013-11-15 2013-11-15 Plugging shield agent for drilling fluid

Publications (1)

Publication Number Publication Date
CN103555295A true CN103555295A (en) 2014-02-05

Family

ID=50009668

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310568461.4A Pending CN103555295A (en) 2013-11-15 2013-11-15 Plugging shield agent for drilling fluid

Country Status (1)

Country Link
CN (1) CN103555295A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104747092A (en) * 2013-12-31 2015-07-01 中国石油化工集团公司 Bit nozzle internal-blockage preventing device
CN110129014A (en) * 2019-05-14 2019-08-16 四川维泰科创石油设备制造有限公司 A kind of nano-micro level drilling fluid pressure-bearing sealing agent and its evaluation method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090291859A1 (en) * 2008-05-22 2009-11-26 Michael Valls Drilling fluid additive
CN101979456A (en) * 2010-08-25 2011-02-23 中国石油化工集团公司 Seawater-based well completion fluid
CN102134476A (en) * 2010-01-25 2011-07-27 中国石油化工集团 Hydrophobic temporary plugging drilling fluid
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
CN102559155A (en) * 2011-12-13 2012-07-11 中国石油集团川庆钻探工程有限公司 Strong-inhibition efficient shielding temporary plugging protection reservoir drilling fluid and preparation method thereof
CN103184039A (en) * 2011-12-28 2013-07-03 中国石油天然气股份有限公司 Strong thixotropic expansion type high-strength chemical plugging agent for water plugging of horizontal well

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090291859A1 (en) * 2008-05-22 2009-11-26 Michael Valls Drilling fluid additive
CN102134476A (en) * 2010-01-25 2011-07-27 中国石油化工集团 Hydrophobic temporary plugging drilling fluid
CN101979456A (en) * 2010-08-25 2011-02-23 中国石油化工集团公司 Seawater-based well completion fluid
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
CN102559155A (en) * 2011-12-13 2012-07-11 中国石油集团川庆钻探工程有限公司 Strong-inhibition efficient shielding temporary plugging protection reservoir drilling fluid and preparation method thereof
CN103184039A (en) * 2011-12-28 2013-07-03 中国石油天然气股份有限公司 Strong thixotropic expansion type high-strength chemical plugging agent for water plugging of horizontal well

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104747092A (en) * 2013-12-31 2015-07-01 中国石油化工集团公司 Bit nozzle internal-blockage preventing device
CN110129014A (en) * 2019-05-14 2019-08-16 四川维泰科创石油设备制造有限公司 A kind of nano-micro level drilling fluid pressure-bearing sealing agent and its evaluation method
CN110129014B (en) * 2019-05-14 2021-08-31 四川维泰科创石油设备制造有限公司 Pressure-bearing plugging agent for nano-micron drilling fluid and evaluation method thereof

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Application publication date: 20140205