CN104087273A - Hypersalinity solid-free micro-foam drilling fluid or completion fluid - Google Patents

Hypersalinity solid-free micro-foam drilling fluid or completion fluid Download PDF

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Publication number
CN104087273A
CN104087273A CN201410240158.6A CN201410240158A CN104087273A CN 104087273 A CN104087273 A CN 104087273A CN 201410240158 A CN201410240158 A CN 201410240158A CN 104087273 A CN104087273 A CN 104087273A
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drilling fluid
parts
fluid
micro
ratio combination
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CN201410240158.6A
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CN104087273B (en
Inventor
王旭东
郭保雨
王宝田
柴金鹏
何兴华
蒋莉
王俊
杨龙波
祁亚男
高素丽
赵红香
李蕾
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Drilling Fluid Technology Service Center Of Sinopec Shengli Petroleum Engineering Co ltd
Sinopec Oilfield Service Corp
Sinopec Shengli Petroleum Engineering Corp
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China Petrochemical Corp
Drilling Engineering Technology Co of Sinopec Shengli Petroleum Engineering Corp
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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
    • C09K8/38—Gaseous or foamed well-drilling compositions

Abstract

The invention discloses a hypersalinity solid-free micro-foam drilling fluid or completion fluid. The drilling fluid is prepared from the following raw materials in parts by weight: (1) 0.3-0.6 parts of a tackifier, (2) 0.3-0.5 parts of a foam stabilizing agent, (3) 0.7-1.1 parts of a foaming agent, (4) 2-3 parts of a filtrate reducer, (5) 0.3-0.5 parts of a flow-pattern adjusting agent, (6) 0.2-0.3 parts of sodium carbonate and (7) 100 parts of a base fluid. The preparation method comprises: successively adding the compositions (1)-(6) according to the weight ratio into the composition (7) under the conditions of normal temperature, normal pressure and mechanical stirring in a routine manner, and stirring for 2-6 h after all compositions are added. The related hypersalinity solid-free micro-foam drilling fluid or completion fluid has excellent rheological performance, relatively good filtrate reducing performance and relatively good stability, and is applicable to well-drilling or well-completion construction of high-salinity (salt bed), low-pressure and easily-leaked stratums.

Description

A kind of high salinity is without solid phase and micro-foam drilling fluid or well finishing liquid
Technical field
The present invention relates to a kind of Drilling and completion fluids, particularly a kind of high salinity is without solid phase and micro-foam drilling fluid or well finishing liquid.
Background technology
At present, a lot of maturing fields of China have entered development late stage, have exhaustion reservoir.Exhaustion reservoir is taking hygroscopicity sandstone as main, often there is large crack, belong to high infiltration or Fractured leakiness stratum, severe leakage and pressure differential sticking often occur in drilling process, use conventional drilling liquid to be difficult to drill smoothly exhausted stratum, and be easy to reservoir to damage.Micro-foam drilling fluid is mainly used in solving creeping into and protection problem of low porosity and low permeability, the lower reservoir of reservoir pressure coefficient, and rig-site utilization is extensive.Along with the continuous expansion of micro-foam drilling fluid Application Areas, the performance of micro-foam drilling fluid is also proposed to more and more higher requirement: in the time boring chance salt solution or saline bed, require micro-foam drilling fluid to there is stronger salt tolerance, to reduce or to avoid the impact on property of drilling fluid that exists of salt.
The data of " research of High Performance Drilling Foam for Under Balanced Drilling " stepped on one section and has been entitled as by " Drilling and completion fluids " magazine volume the 3rd periodical May the 24th in 2007, utilizes the composite pore forming material that obtains high-performance foam drilling fluid of AGS-8, AGS-10 and tea saponin to build the micro-foam drilling fluid system of stronger salt tolerance.Its formula is: 0.5% AGSS (AGS-8:AGS-10: tea saponin=4:6:5)+2.0% clay+0.3% FA367-Ι Ι.
The data of " saturated brine Foam research application " stepped on one section and has been entitled as by " Changjiang University's journal (from section's version) science and engineering volume " magazine volume the 2nd periodical June the 4th in 2007; utilize saturated brine to build a kind of rheological and the good Foam of reservoir protection as base fluid, its formula is: 6% swelling+0.05%Na2CO3+0.6%HTV-II+0.8%LV-CMC+1%SPNH+2%SMP+1.5%XCS-I I+36%
NaCl+0.2%XC-ZQP+0.2%XC-FQP。Site test results shows, this property of drilling fluid is stable, can meet safety and creep into requirement.
The data of " research and the application of high salinity micro-foam drilling fluid technology " stepped on one section and has been entitled as by " Drilling and completion fluids " magazine volume the 2nd periodical March the 25th in 2008, saturated salt-water drilling fluid system is transformed into the micro-foam drilling fluid of high salinity, its formula is: 4% sodium bentonite+1%CMS+1%HPNH+2%SMP-2+1%HV-CMC+0.1%NaOH+30%NaCl+0.2%PAC+ (0.1% ~ 0.2%) QP-1+0.2%H-XC+ (0.1% ~ 0.2%) QP-2.This formula shows satisfactory stability and stronger leakproof, leak stopping capability in application process at the scene, and the exploitation of saline bed bottom low pressure reservoir is had to good application value.
The deficiency of above-mentioned technology is: 1, in system, contains relatively large wilkinite, needs prehydration with slurry, and complex process, the waiting time is long; Easily there is hydration swelling in the submicron solid phase particles such as the clay 2, containing in system, stops up vapour gas-bearing formation duct, can damage reservoir, is difficult to protect to greatest extent and find hydrocarbon zone.
Chinese patent CN101643641B and Chinese patent CN101649192A have announced respectively a kind of low solid content and the micro-foam drilling fluid formula without solid load; remove the process of wilkinite prehydration; and in drilling fluid system, contain and contain on a small quantity or not clay particle, protection hydrocarbon zone is effective.But the structure that does not relate to high salinity micro-foam drilling fluid in these two patents, has limited its use at high salty formations such as saline beds.
The data of " without research and the application of solid phase and micro-foam drilling fluid " stepped on one section and has been entitled as by " Drilling and completion fluids " magazine volume the 3rd periodical May the 29th in 2012, introduced a kind of without solid phase and micro-foam drilling fluid drilling fluid system.This drilling fluid system does not contain wilkinite, and has good inhibition, has carried out rig-site utilization at flat 1 well of Shao 4-, respond well.But in literary composition, do not introduce the anti-salt property of this drilling fluid system, limited its use at high salty formations such as saline beds.
Summary of the invention
Object of the present invention is exactly in view of the foregoing defects the prior art has, provides a kind of high salinity without solid phase and micro-foam drilling fluid or well finishing liquid.
Its technical scheme is to be made up of the component of following weight part:
(1) 0.3 ~ 0.6 part of tackifier SL-KDT
(2) 0.3 ~ 0.5 part of suds-stabilizing agent SL-KWJ
(3) 0.7 ~ 1.1 part of whipping agent SL-KDF
(4) 2 ~ 3 parts of fluid loss agent SL-KJL
(5) 0.3 ~ 0.5 part of flow pattern regulator SL-KDPR
(6) 0.2 ~ 0.3 part of soda ash
(7) 100 parts of base fluids
Wherein, tackifier SL-KDT is xanthan gum XC: the ratio combination of high sticky Xylo-Mucine HV-CMC=2 ~ 4:1 ~ 3, and suds-stabilizing agent SL-KWJ is Polyanionic Cellulose PAC: the ratio combination of polyacrylamide PAM=3 ~ 6:1 ~ 2; Whipping agent SL-KDF is anti-salt modification tea saponin ZY-WP: α-sodium olefin sulfonate AOS: the ratio combination of dimethyl dodecyl amine oxide OB-2=5 ~ 9:2 ~ 3:1 ~ 2; Fluid loss agent SL-KJL is treated starch DFD-140: valchovite SPNH: the ratio combination of sulfonated-pheno-formoldehyde resin SMP-II=3 ~ 5:4 ~ 6:1 ~ 3, flow pattern regulator SL-KDPR is organosilicon potassium humate, soda ash is sodium carbonate, the saturated solution that base fluid is sodium-chlor
By the component of this drilling fluid or well finishing liquid (1)-(6) by above-mentioned content, at normal temperature and pressure, under churned mechanically condition, add successively in a usual manner component (7) in, all add rear stirring 2-6 hour.
Above-mentioned tackifier SL-KDT is xanthan gum XC: the ratio composition of high sticky Xylo-Mucine HV-CMC=1:1.
Above-mentioned suds-stabilizing agent SL-KWJ is Polyanionic Cellulose PAC: the ratio combination of polyacrylamide PAM=6:1.
Above-mentioned whipping agent SL-KDF is anti-salt modification tea saponin ZY-WP: α-sodium olefin sulfonate AOS: the ratio combination of dimethyl dodecyl amine oxide OB-2=9:2:2.
Above-mentioned fluid loss agent SL-KJL is treated starch DFD-140: valchovite SPNH: the ratio combination of sulfonated-pheno-formoldehyde resin SMP-II=3:5:3.
Wherein, described xanthan gum (XC), high sticky Xylo-Mucine (HV-CMC) and Polyanionic Cellulose (PAC) are the products of Zibo Hailan Chemical Co., Ltd.; Polyacrylamide (PAM), valchovite (SPNH) and sulfonated-pheno-formoldehyde resin (SMP-II) are the products of Shengli Oil Field blogger Mud Technology limited liability company; Anti-salt modification tea saponin (ZY-WP) is the product of Hangzhou Zhongye Plant Technology Co., Ltd.; α-sodium olefin sulfonate (AOS) is the product of Zibo Hai Lai Trade Co., Ltd.; Dimethyl dodecyl amine oxide (OB-2) is the product of Shandong long-chain Chemical Co., Ltd.; Treated starch (DFD-140) is the product of Xinjiang Zhundong Petroleum Technology Co., Ltd.; Organosilicon potassium humate is the product of the Yanggu north of the Changjiang River, Shandong Chemical Co., Ltd.; Sodium carbonate and sodium-chlor are the products of Shanghai Chemical Reagent Co., Ltd., Sinopharm Group.
The present invention compared with prior art, has following effect:
(1), micro-foam drilling fluid of the present invention or well finishing liquid saline-alkaline tolerance strong, still there is good stability using the saturated solution of sodium-chlor as base fluid, be suitable for the probing of saline bed;
(2), micro-foam drilling fluid of the present invention or well finishing liquid do not contain wilkinite, little to reservoir damage, effective to reservoir protection;
(3), micro-foam drilling fluid of the present invention or well finishing liquid rheological property excellence, there is stronger large rock-carrying ability;
(4), micro-foam drilling fluid of the present invention or well finishing liquid filter loss low, hole fine fisssure is sewed with to leakproof, leak stopping effect, be suitable for the probing on high infiltration or Fractured leakiness stratum;
(5), micro-foam drilling fluid of the present invention or well finishing liquid do not contain wilkinite, do not need prehydration with slurry, prepares convenient and swiftly, simplified site construction technology;
(6), micro-foam drilling fluid of the present invention or density of completion fluids variable range are wide.
Embodiment
In conjunction with concrete embodiment, the invention will be further described:
The high salinity that the present invention mentions is without solid phase and micro-foam drilling fluid or well finishing liquid, its compound method:
Be prepared as follows without solid phase and micro-foam drilling fluid or well finishing liquid for the high salinity of following indefiniteness embodiment, composition and ratio, according to weight of additive part:
(1) 0.3 ~ 0.6 part of tackifier SL-KDT
(2) 0.3 ~ 0.5 part of suds-stabilizing agent SL-KWJ
(3) 0.7 ~ 1.1 part of whipping agent SL-KDF
(4) 2 ~ 3 parts of fluid loss agent SL-KJL
(5) 0.3 ~ 0.5 part of flow pattern regulator SL-KDPR
(6) 0.2 ~ 0.3 part of soda ash
(7) 100 parts of base fluids
Wherein, tackifier SL-KDT is xanthan gum XC: the ratio combination of high sticky Xylo-Mucine HV-CMC=2 ~ 4:1 ~ 3, and suds-stabilizing agent SL-KWJ is Polyanionic Cellulose PAC: the ratio combination of polyacrylamide PAM=3 ~ 6:1 ~ 2; Whipping agent SL-KDF is anti-salt modification tea saponin ZY-WP: α-sodium olefin sulfonate AOS: the ratio combination of dimethyl dodecyl amine oxide OB-2=5 ~ 9:2 ~ 3:1 ~ 2; Fluid loss agent SL-KJL is treated starch DFD-140: valchovite SPNH: the ratio combination of sulfonated-pheno-formoldehyde resin SMP-II=3 ~ 5:4 ~ 6:1 ~ 3, flow pattern regulator SL-KDPR is organosilicon potassium humate, soda ash is sodium carbonate, the saturated solution that base fluid is sodium-chlor
Compound method: said components (1)-(6) by its content, at normal temperatures and pressures, under churned mechanically condition (600 ~ 1000 turn/min) add successively in a usual manner component (7) in, all add rear stirring 2-6 hour, preferably 4 hours.
  
The high salinity that the present invention mentions is without the detection method of solid phase and micro-foam drilling fluid or well finishing liquid performance:
High salinity is used Fann35A type viscometer to carry out under 25 DEG C of conditions without the detection of solid phase and micro-foam drilling fluid or well finishing liquid, measures successively 600r/min, 300 r/min, 200 r/min, 100 r/min, 6 r/min, the reading of 3 r/min is designated as respectively: Φ 600, Φ 300, Φ 200, Φ 100, Φ 6, the reading of Φ 3, according to following formula computational plasticity viscosity and yield value:
Apparent viscosity (AV)=1/2 (Φ 600);
Plastic viscosity (PV)=Φ 600 – Φ 300;
Yield value (YP)=1/2 (Φ 300 – PV).
The high salinity that the present invention mentions is without the detection method of solid phase and micro-foam drilling fluid or well finishing liquid filtration property:
Block the aperture of pressure filter joint with finger, micro-foam drilling fluid is poured in pressure filter, make liquid level higher than scale marks in cup and be l centimetre apart from distance from top, put O RunddichtringO well, pave filter paper, tighten bowl cover, then pressure filter is communicated with Y-junction, and measuring graduates is placed on below press filtration instrument spout.Pressurization timing rapidly, institute's plus-pressure is 0.7 MPa.Pressure source is nitrogen.In the time of time to 30 of leaching minute, the residual drop on filtration device spout is collected in graduated cylinder, remove graduated cylinder, read and record the volume (unit is mL) of gathered filtrate.
The high salinity that the present invention mentions is without the detection method of solid phase and micro-foam drilling fluid or well finishing liquid stability:
Get 100 parts of base fluids, add required treatment agent to prepare high salinity involved in the present invention without solid phase and micro-foam drilling fluid or well finishing liquid, be poured into rapidly afterwards in graduated cylinder, start timing, and observe and separate out 50 parts of needed times of liquid, be transformation period t 1/2.
  
Embodiment 1
(1) tackifier SL-KDT, 0.4 part, by xanthan gum (XC): the ratio of high sticky Xylo-Mucine (HV-CMC)=1:1 forms; (2) suds-stabilizing agent SL-KWJ, 0.4 part, by Polyanionic Cellulose (PAC): the ratio combination of polyacrylamide (PAM)=4:1.5; (3) whipping agent SL-KDF, 0.7 part, by anti-salt modification tea saponin (ZY-WP): α-sodium olefin sulfonate (AOS): the ratio combination of dimethyl dodecyl amine oxide (OB-2)=6:2:1; (4) fluid loss agent SL-KJL, 2.5 parts, by treated starch (DFD-140): valchovite (SPNH): the ratio combination of sulfonated-pheno-formoldehyde resin (SMP-II)=4:4:1; (5) flow pattern regulator SL-KDPR, 0.3 part is organosilicon potassium humate; (6) soda ash, 0.2 part is sodium carbonate; (7) base fluid, 100 parts is the saturated solution of sodium-chlor.
Compound method: said components (1)-(6) by its content, at normal temperatures and pressures, under churned mechanically condition (600 ~ 1000 turn/min) add successively in a usual manner component (7) in, all add rear stirring 4 hours, test its rheological property, filtration property and transformation period.
  
Embodiment 2
(1) tackifier SL-KDT, 0.5 part, by xanthan gum (XC): the ratio of high sticky Xylo-Mucine (HV-CMC)=4:1 forms; (2) suds-stabilizing agent SL-KWJ, 0.3 part, by Polyanionic Cellulose (PAC): the ratio combination of polyacrylamide (PAM)=6:1; (3) whipping agent SL-KDF, 0.8 part, by anti-salt modification tea saponin (ZY-WP): α-sodium olefin sulfonate (AOS): the ratio combination of dimethyl dodecyl amine oxide (OB-2)=7:3:2; (4) fluid loss agent SL-KJL, 2 parts, by treated starch (DFD-140): valchovite (SPNH): the ratio combination of sulfonated-pheno-formoldehyde resin (SMP-II)=5:6:1; (5) flow pattern regulator SL-KDPR, 0.4 part is organosilicon potassium humate; (6) soda ash, 0.3 part is sodium carbonate; (7) base fluid, 100 parts is the saturated solution of sodium-chlor.
Compound method: said components (1)-(6) by its content, at normal temperatures and pressures, under churned mechanically condition (600 ~ 1000 turn/min) add successively in a usual manner component (7) in, all add rear stirring 4 hours, test its rheological property, filtration property and transformation period.
  
Embodiment 3
(1) tackifier SL-KDT, 0.6 part, by xanthan gum (XC): the ratio of high sticky Xylo-Mucine (HV-CMC)=2:3 forms; (2) suds-stabilizing agent SL-KWJ, 0.5 part, by Polyanionic Cellulose (PAC): the ratio combination of polyacrylamide (PAM)=3:2; (3) whipping agent SL-KDF, 0.9 part, by anti-salt modification tea saponin (ZY-WP): α-sodium olefin sulfonate (AOS): the ratio combination of dimethyl dodecyl amine oxide (OB-2)=9:2:2; (4) fluid loss agent SL-KJL, 3 parts, by treated starch (DFD-140): valchovite (SPNH): the ratio combination of sulfonated-pheno-formoldehyde resin (SMP-II)=3:5:3; (5) flow pattern regulator SL-KDPR, 0.5 part is organosilicon potassium humate; (6) soda ash, 0.2 part is sodium carbonate; (7) base fluid, 100 parts is the saturated solution of sodium-chlor.
Compound method: said components (1)-(6) by its content, at normal temperatures and pressures, under churned mechanically condition (600 ~ 1000 turn/min) add successively in a usual manner component (7) in, all add rear stirring 4 hours, test its rheological property, filtration property and transformation period.
  
Embodiment 4
(1) tackifier SL-KDT, 0.6 part, by xanthan gum (XC): the ratio of high sticky Xylo-Mucine (HV-CMC)=4:3 forms; (2) suds-stabilizing agent SL-KWJ, 0.5 part, by Polyanionic Cellulose (PAC): the ratio combination of polyacrylamide (PAM)=6:1; (3) whipping agent SL-KDF, 1.1 parts, by anti-salt modification tea saponin (ZY-WP): α-sodium olefin sulfonate (AOS): the ratio combination of dimethyl dodecyl amine oxide (OB-2)=9:3:2; (4) fluid loss agent SL-KJL, 3 parts, by treated starch (DFD-140): valchovite (SPNH): the ratio combination of sulfonated-pheno-formoldehyde resin (SMP-II)=5:6:3; (5) flow pattern regulator SL-KDPR, 0.5 part is organosilicon potassium humate; (6) soda ash, 0.3 part is sodium carbonate; (7) base fluid, 100 parts is the saturated solution of sodium-chlor.
Compound method: said components (1)-(6) by its content, at normal temperatures and pressures, under churned mechanically condition (600 ~ 1000 turn/min) add successively in a usual manner component (7) in, all add rear stirring 4 hours, test its rheological property, filtration property and transformation period.
  
Embodiment 5
(1) tackifier SL-KDT, 0.3 part, by xanthan gum (XC): the ratio of high sticky Xylo-Mucine (HV-CMC)=2:1 forms; (2) suds-stabilizing agent SL-KWJ, 0.3 part, by Polyanionic Cellulose (PAC): the ratio combination of polyacrylamide (PAM)=3:1; (3) whipping agent SL-KDF, 0.7 part, by anti-salt modification tea saponin (ZY-WP): α-sodium olefin sulfonate (AOS): the ratio combination of dimethyl dodecyl amine oxide (OB-2)=5:2:1; (4) fluid loss agent SL-KJL, 2 parts, by treated starch (DFD-140): valchovite (SPNH): the ratio combination of sulfonated-pheno-formoldehyde resin (SMP-II)=3:4:1; (5) flow pattern regulator SL-KDPR, 0.3 part is organosilicon potassium humate; (6) soda ash, 0.2 part is sodium carbonate; (7) base fluid, 100 parts is the saturated solution of sodium-chlor.
Compound method: said components (1)-(6) by its content, at normal temperatures and pressures, under churned mechanically condition (600 ~ 1000 turn/min) add successively in a usual manner component (7) in, all add rear stirring 4 hours, test its rheological property, filtration property and transformation period.
  
The related high salinity of embodiment 1 ~ 5 is without the performance characterization of solid phase and micro-foam drilling fluid or well finishing liquid, as shown in table 1.
Table 1 high salinity is without the performance characterization of solid phase and micro-foam drilling fluid or well finishing liquid
From the data of table 1, high salinity micro-foam drilling fluid involved in the present invention or the density range of well finishing liquid are large, at 0.70 ~ 1.05 g/cm 3between adjustable, illustrate development whipping agent in saturated brine, there is good foam performance, can effectively reduce the density of saturated salt-water drilling fluid system; Rheological property excellence, viscosity and shear force remain in good level, have and take preferably salt ability, can meet the needs of drilling well; Filter loss is less than 7.5 mL, illustrates that the micro-foam drilling fluid the present invention relates to has excellent leak-proof leak-stopping ability, and hole fine fisssure is sewed with to leakproof, leakage leak stopping effect, is suitable for the probing on high infiltration or Fractured leakiness stratum; Transformation period all, more than 8h, illustrates that the micro-foam drilling fluid stability the present invention relates to is fine, can meet the needs of rig-site utilization.

Claims (5)

1. high salinity, without solid phase and micro-foam drilling fluid or a well finishing liquid, is characterized in that being made up of the component of following weight part:
(1) 0.3 ~ 0.6 part of tackifier SL-KDT
(2) 0.3 ~ 0.5 part of suds-stabilizing agent SL-KWJ
(3) 0.7 ~ 1.1 part of whipping agent SL-KDF
(4) 2 ~ 3 parts of fluid loss agent SL-KJL
(5) 0.3 ~ 0.5 part of flow pattern regulator SL-KDPR
(6) 0.2 ~ 0.3 part of soda ash
(7) 100 parts of base fluids
Wherein, tackifier SL-KDT is xanthan gum XC: the ratio combination of high sticky Xylo-Mucine HV-CMC=2 ~ 4:1 ~ 3, and suds-stabilizing agent SL-KWJ is Polyanionic Cellulose PAC: the ratio combination of polyacrylamide PAM=3 ~ 6:1 ~ 2; Whipping agent SL-KDF is anti-salt modification tea saponin ZY-WP: α-sodium olefin sulfonate AOS: the ratio combination of dimethyl dodecyl amine oxide OB-2=5 ~ 9:2 ~ 3:1 ~ 2; Fluid loss agent SL-KJL is treated starch DFD-140: valchovite SPNH: the ratio combination of sulfonated-pheno-formoldehyde resin SMP-II=3 ~ 5:4 ~ 6:1 ~ 3, flow pattern regulator SL-KDPR is organosilicon potassium humate, soda ash is sodium carbonate, the saturated solution that base fluid is sodium-chlor
By the component of this drilling fluid or well finishing liquid (1)-(6) by above-mentioned content, at normal temperature and pressure, under churned mechanically condition, add successively in a usual manner component (7) in, all add rear stirring 2-6 hour.
2. high salinity according to claim 1, without solid phase and micro-foam drilling fluid or well finishing liquid, is characterized in that: tackifier SL-KDT is xanthan gum XC: the ratio composition of high sticky Xylo-Mucine HV-CMC=1:1.
3. high salinity according to claim 1, without solid phase and micro-foam drilling fluid or well finishing liquid, is characterized in that: suds-stabilizing agent SL-KWJ is Polyanionic Cellulose PAC: the ratio combination of polyacrylamide PAM=6:1.
4. high salinity according to claim 1, without solid phase and micro-foam drilling fluid or well finishing liquid, is characterized in that: whipping agent SL-KDF is anti-salt modification tea saponin ZY-WP: α-sodium olefin sulfonate AOS: the ratio combination of dimethyl dodecyl amine oxide OB-2=9:2:2.
5. high salinity according to claim 1, without solid phase and micro-foam drilling fluid or well finishing liquid, is characterized in that: fluid loss agent SL-KJL is treated starch DFD-140: valchovite SPNH: the ratio combination of sulfonated-pheno-formoldehyde resin SMP-II=3:5:3.
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CN105199695A (en) * 2015-10-23 2015-12-30 松原市海洋石油技术有限公司 Oil pipe protection fluid with temporary plugging function and preparation method and application thereof
CN108690587A (en) * 2018-05-21 2018-10-23 北京力会澜博能源技术有限公司 The capsule suede agent of natural gas well suede bag pressure well liquid
CN109236219A (en) * 2018-11-16 2019-01-18 中联煤层气有限责任公司 A kind of method for regulating density and Auto-regulating System of Density of Heavy Medium equipment of foam drilling fluid
CN109294536A (en) * 2018-11-16 2019-02-01 中联煤层气有限责任公司 Foam drilling fluid for the exploitation of three gas naked eyes
CN110283575A (en) * 2019-06-12 2019-09-27 刘国辉 A kind of high temperature resistant salt tolerant fluid loss agent

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