CN102226075A - Formula and preparation method of solid-phase-free strongly-inhibitive drilling fluid - Google Patents
Formula and preparation method of solid-phase-free strongly-inhibitive drilling fluid Download PDFInfo
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Abstract
The invention relates to a formula and a preparation method of a solid-phase-free strongly-inhibitive drilling fluid, which mainly solve the technical problems of formation contamination, sand shale borehole instability, poor lubrication, and so on. The formulat of the drilling fluid comprises clear water, a binder, an inhibitor, a fluid loss additive, a slurry cake improver and a soluble salt, wherein the binder is modified xanthan gum, the inhibitor is organic amines, the fluid loss additive is modified starch or other substances, the slurry cake improver is sulfonated asphalt (SAS), and the soluble salt is selected from KCl, K2SO4, HCOONa and HCOOK. The preparation method comprises the following steps: adding a high-molecular-weight main agent into clear water, then adding other low-molecular-weight assistant treating agents, and finally adding the soluble salt to obtain the drilling fluid. The drilling fluid provided by the invention has water loss less than 10 mL, and can ensure borehole stability of a highly deviated well, retain the original physical properties of the formation and prevent formation contamination. In addition, the drilling fluid has high-temperature stability, and the permeability recovery is up to 85% or higher.
Description
Technical field
The present invention relates to a kind of no solid phase strong rejection capability DRILLING FLUID FORMULATION and preparation method, be mainly used in the drilling fluid that preparation has protection hydrocarbon zone ability, belong to the petroleum drilling fluid technical field.
Background technology
For oil gas drilling; the reservoir drilling fluid is the outside fluid of contact reservoir in the drilling process; solid phase and the liquid phase of forming the reservoir drilling fluid all can exert an influence to reservoir; therefore; need a kind of drilling fluid with very strong protection hydrocarbon zone ability; can effectively reduce the accident complexity in the drilling process, wellbore clearance, and property of drilling fluid is stable.At present, domestic this type of drilling fluid technology of preparing mostly is offshore company greatly and grasps, and as strong rejection capability KCl salt solution polymer drilling fluid body, its drilling fluid composition is taked technical know-how, and the domestic petroleum DRILLING APPLICATION need be paid very high expense.Especially present; the oil-gas exploration target mostly is the probing of mid-deep strata; the degree of depth is about 5000m; about 170 ℃ of well Wen Keda; for protecting hydrocarbon zone not contaminated; often adopt under-balanced drilling; under insufficient balance condition; resident fluid can flow into pit shaft; cause the original conventional drilling fluid that uses to be infected, handle that drilling fluid can lose flowability when invalid, and follow sand mud ground layer borehole well instability; anti-rock core powder and anti-gypsum that urgent need has strong rejection capability pollute; the drilling fluid of Corrosion Protection is to reduce the infringement to the stratum; reduce comprehensive cost; improve oil recovery.
Summary of the invention
The object of the present invention is to provide a kind of no solid phase strong rejection capability DRILLING FLUID FORMULATION and preparation method; by desk research, screening and test in place; finish the preferred of main treating agent, auxiliary treatment agent and drilling fluid composition; with in the drilling process that satisfies present oil-gas exploration mid-deep strata to the demand of strong rejection capability drilling fluid; reduction accident complexity, wellbore clearance; stablize property of drilling fluid, play the protection hydrocarbon zone and improve oil recovery, reduce the purpose of comprehensive cost.
The present invention adopts following technical scheme: drilling fluid composition of the present invention is by clear water, 4～6kg/m
3Carry stick, 0.008～0.012m
3/ m
3Inhibitor, 8～20kg/m
3Fluid loss agent, 20kg/m
3Mud cake activator and 200～300kg/m
3Soluble salt is prepared from;
Clear water among the present invention is meant that salinity does not contain the process water of tensio-active agent less than 3000ppm after tested.
The stick of carrying that uses among the present invention is the modification xanthan gum, and the modification xanthan gum is that a kind of molecular formula is (C
6H
10O
5) the n biological polymer, its outward appearance is the pale yellow powder shape, is taken place to obtain after crosslinked by xanthan gum and little linking agent; Carry stick in order to improve drilling fluid viscosity and shear force.
The inhibitor that uses among the present invention is organic amine, and the exemplary configuration skeleton symbol is:
NH
2(RCH
2CHO)
XCH
2RCHNH
2
R is for containing 1～6 carbon atom alkyl in the following formula, and the x value is 1～10 integer.
Inhibitor ionization in drilling fluid goes out positive charge, and quick and drilling cuttings surface adsorption forms protective membrane on the drilling cuttings surface, inlays simultaneously to enter between the clay crystal layer, changes the structural capacity between crystal layer, makes clay be difficult for aquation and disperses.
The fluid loss agent that uses among the present invention: comprise that treated starch, PAC-LV Polyanionic Cellulose, SMP-I, SMP-II are products such as sulfonated phenol formaldehyde resin, wherein SMP-I can resist 100 ℃ of high temperature; SMP-II can resist 140 ℃ of high temperature.Play and the free water in the drilling fluid is become irreducible water, anti-sealing infiltration stratum and drilling cuttings aquation.
The mud cake activator that uses among the present invention is mainly used in improvement of mud cake as sulfonated gilsonite SAS, the control filter loss.
The soluble salt that uses among the present invention: comprise that soluble inorganic salt is like KCL, K
2SO
4With solubility organic salt such as HCOONa, HCOOK.Adjust drilling fluid density, improve the inhibition aquation dispersing characteristic of drilling fluid drilling cuttings.
The principle of no solid phase strong rejection capability drilling fluid preparation of the present invention is to add macromole host earlier, adds other auxiliary treatment agent of small molecules again, adds soluble salt at last, and concrete preparation order is as follows
(1) the required clear water amount of measuring and calculating drilling fluid in clear water, is carried stick according to the weightmeasurement ratio adding of setting, and with 600 rev/mins, stirs 1 hour;
(2) in the liquid of finishing the rapid preparation of previous step, add inhibitor according to the volume ratio of setting, with 600 rev/mins, stirred 1 hour;
(3) in the liquid of finishing the rapid preparation of previous step, add fluid loss agent according to the weightmeasurement ratio of setting, with 600 rev/mins, stirred 1 hour;
(4) in the liquid of finishing the rapid preparation of previous step, add the mud cake activator according to the weightmeasurement ratio of setting, with 600 rev/mins, stirred 0.5 hour;
(5) in the liquid of finishing the rapid preparation of previous step, add soluble salt according to the weightmeasurement ratio of setting, with 600 rev/mins, stirred 1 hour, finish preparation, obtain not having solid phase strong rejection capability drilling fluid.
Above-mentioned no solid phase strong rejection capability drilling fluid is in preparation process, when the treatment agent that adds in a certain step is not only a kind of, can select wherein a certain, also can be according to the actual demand of drilling fluid, add two or more reagent through measuring and calculating, to realize the raising of some physical index of drilling fluid, as when fluid loss agent is selected, adopt the sulfonated phenol formaldehyde resin of SMP-II type, just the drilling fluid heat resistance can be brought up to 140 ℃.
Above-mentioned no solid phase strong rejection capability drilling fluid can be realized by the increase and decrease on the soluble salt consumption when regulating drilling fluid density.
Embodiment
Below in conjunction with specific embodiment, no solid phase strong rejection capability drilling fluid composition of the present invention and preparation method thereof is further specified.
Embodiment one: the amount according to required drilling fluid, adopt following prescription
Clear water+4kg/m
3Carry stick+0.012m
3/ m
3Inhibitor+8kg/m
3Fluid loss agent+20kg/m
3Mud cake activator+200kg/m
3Soluble salt,
Carry stick in the following formula and adopt the modification xanthan gum, inhibitor adopts organic amine, and fluid loss agent is selected treated starch for use, and the mud cake activator is selected sulfonated gilsonite SAS for use, and soluble salt is selected KCL for use;
Preparation as follows
(1) the required clear water amount of measuring and calculating drilling fluid is in clear water, according to weightmeasurement ratio 4kg/m
3Add the modification xanthan gum,, stirred 1 hour with 600 rev/mins;
(2) in the liquid of finishing the rapid preparation of previous step, according to volume ratio 0.012m
3/ m
3Add organic amine,, stirred 1 hour with 600 rev/mins;
(3) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 8kg/m
3Add treated starch,, stirred 1 hour with 600 rev/mins;
(4) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 20kg/m
3Add SAS,, stirred 0.5 hour with 600 rev/mins;
(5) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 200kg/m
3Add KCL,, stirred 1 hour, finish preparation, obtain not having solid phase strong rejection capability drilling fluid with 600 rev/mins.
Embodiment two: the amount according to required drilling fluid, adopt following prescription
Clear water+6kg/m
3Carry stick+0.012m
3/ m
3Inhibitor+8kg/m
3Fluid loss agent+20kg/m
3Mud cake activator+200kg/m
3Soluble salt,
Carry stick in the following formula and adopt the modification xanthan gum, inhibitor adopts organic amine, and fluid loss agent is selected Polyanionic Cellulose PAC-LV for use, and the mud cake activator is selected sulfonated gilsonite SAS for use, and soluble salt is selected K for use
2SO
4
Prepare according to following steps:
(1) the required clear water amount of measuring and calculating drilling fluid is in clear water, according to weightmeasurement ratio 6kg/m
3Add the modification xanthan gum,, stirred 1 hour with 600 rev/mins;
(2) in the liquid of finishing the rapid preparation of previous step, according to volume ratio 0.012m
3/ m
3Add organic amine,, stirred 1 hour with 600 rev/mins;
(3) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 8kg/m
3Add Polyanionic Cellulose PAC-LV,, stirred 1 hour with 600 rev/mins;
(4) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 20kg/m
3Add SAS,, stirred 0.5 hour with 600 rev/mins;
(5) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 200kg/m
3Add K
2SO
4, with 600 rev/mins, stirred 1 hour, finish preparation, obtain not having solid phase strong rejection capability drilling fluid.
Embodiment three: the amount according to required drilling fluid, adopt following prescription
Clear water+4kg/m
3Carry stick+0.008m
3/ m
3Inhibitor+8kg/m
3Fluid loss agent+20kg/m
3Mud cake activator+200kg/m
3Soluble salt;
Carry stick in the following formula and adopt the modification xanthan gum, inhibitor adopts organic amine, and fluid loss agent is selected treated starch for use, and the mud cake activator is selected sulfonated gilsonite SAS for use, and soluble salt is selected HCOONa for use;
Prepare according to following steps:
(1) the required clear water amount of measuring and calculating drilling fluid is in clear water, according to weightmeasurement ratio 4kg/m
3Add the modification xanthan gum,, stirred 1 hour with 600 rev/mins;
(2) in the liquid of finishing the rapid preparation of previous step, according to volume ratio 0.008m
3/ m
3Add organic amine,, stirred 1 hour with 600 rev/mins;
(3) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 8kg/m
3Add poly-treated starch,, stirred 1 hour with 600 rev/mins;
(4) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 20kg/m
3Add SAS,, stirred 0.5 hour with 600 rev/mins;
(5) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 200kg/m
3Add HCOONa,, stirred 1 hour, finish preparation, obtain not having solid phase strong rejection capability drilling fluid with 600 rev/mins.
Embodiment four: the amount according to required drilling fluid, adopt following prescription
Clear water+6kg/m
3Carry stick+0.008m
3/ m
3Inhibitor+8kg/m
3Fluid loss agent+20kg/m
3Mud cake activator+200kg/m
3Soluble salt;
Carry stick in the following formula and adopt the modification xanthan gum, inhibitor adopts organic amine, and fluid loss agent is selected treated starch for use, and the mud cake activator is selected sulfonated gilsonite SAS for use, and soluble salt is selected HCOOK for use;
Prepare according to following steps:
(1) the required clear water amount of measuring and calculating drilling fluid is in clear water, according to weightmeasurement ratio 6kg/m
3Add the modification xanthan gum,, stirred 1 hour with 600 rev/mins;
(2) in the liquid of finishing the rapid preparation of previous step, according to volume ratio 0.008m
3/ m
3Add organic amine,, stirred 1 hour with 600 rev/mins;
(3) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 8kg/m
3Add poly-treated starch,, stirred 1 hour with 600 rev/mins;
(4) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 20kg/m
3Add SAS,, stirred 0.5 hour with 600 rev/mins;
(5) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 200kg/m
3Add HCOOK,, stirred 1 hour, finish preparation, obtain not having solid phase strong rejection capability drilling fluid with 600 rev/mins.
Embodiment five: the amount according to required drilling fluid, adopt following prescription
Clear water+5kg/m
3Carry stick+0.012m
3/ m
3Inhibitor+8kg/m
3Fluid loss agent+20kg/m
3Mud cake activator+200kg/m
3Soluble salt
Carry stick in the following formula and adopt the modification xanthan gum, inhibitor adopts organic amine, and fluid loss agent is selected treated starch for use, and the mud cake activator is selected sulfonated gilsonite SAS for use, and soluble salt is selected KCL for use;
Prepare according to following steps:
(1) the required clear water amount of measuring and calculating drilling fluid is in clear water, according to weightmeasurement ratio 5kg/m
3Add the modification xanthan gum,, stirred 1 hour with 600 rev/mins;
(2) in the liquid of finishing the rapid preparation of previous step, according to volume ratio 0.012m
3/ m
3Add organic amine,, stirred 1 hour with 600 rev/mins;
(3) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 8kg/m
3Add poly-treated starch,, stirred 1 hour with 600 rev/mins;
(4) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 20kg/m
3Add SAS,, stirred 0.5 hour with 600 rev/mins;
(5) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 200kg/m
3Add KCL,, stirred 1 hour, finish preparation, obtain not having solid phase strong rejection capability drilling fluid with 600 rev/mins.
Embodiment six: the amount according to required drilling fluid, adopt following prescription
Clear water+6kg/m
3Carry stick+0.010m
3/ m
3Inhibitor+8kg/m
3Fluid loss agent+20kg/m
3Mud cake activator+200kg/m
3Soluble salt;
Carry stick in the following formula and adopt the modification xanthan gum, inhibitor adopts organic amine, and fluid loss agent is selected treated starch for use, and the mud cake activator is selected sulfonated gilsonite SAS for use, and soluble salt is selected KCL for use;
Prepare according to following steps:
(1) the required clear water amount of measuring and calculating drilling fluid is in clear water, according to weightmeasurement ratio 6kg/m
3Add the modification xanthan gum,, stirred 1 hour with 600 rev/mins;
(2) in the liquid of finishing the rapid preparation of previous step, according to volume ratio 0.010m
3/ m
3Add organic amine,, stirred 1 hour with 600 rev/mins;
(3) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 8kg/m
3Add poly-treated starch,, stirred 1 hour with 600 rev/mins;
(4) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 20kg/m
3Add SAS,, stirred 0.5 hour with 600 rev/mins;
(5) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 200kg/m
3Add KCL,, stirred 1 hour, finish preparation, obtain not having solid phase strong rejection capability drilling fluid with 600 rev/mins.
Embodiment seven: the amount according to required drilling fluid, adopt following prescription
Clear water+6kg/m
3Carry stick+0.010m
3/ m
3Inhibitor+8kg/m
3Fluid loss agent+20kg/m
3Mud cake activator+200kg/m
3Soluble salt
Carry stick in the following formula and adopt the modification xanthan gum, inhibitor adopts organic amine, and fluid loss agent is selected sulfonated phenolic resin SMP-I for use, and the mud cake activator is selected sulfonated gilsonite SAS for use, and soluble salt is selected KCL for use;
Prepare according to following steps:
(1) the required clear water amount of measuring and calculating drilling fluid is in clear water, according to weightmeasurement ratio 6kg/m
3Add the modification xanthan gum,, stirred 1 hour with 600 rev/mins;
(2) in the liquid of finishing the rapid preparation of previous step, according to volume ratio 0.010m
3/ m
3Add organic amine,, stirred 1 hour with 600 rev/mins;
(3) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 8kg/m
3Add sulfonated phenolic resin SMP-I,, stirred 1 hour with 600 rev/mins;
(4) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 20kg/m
3Add SAS,, stirred 0.5 hour with 600 rev/mins;
(5) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 200kg/m
3Add KCL,, stirred 1 hour, finish preparation, obtain not having solid phase strong rejection capability drilling fluid with 600 rev/mins, but 100 ℃ of this drilling fluid temperature resistances.
Embodiment eight: the amount according to required drilling fluid, adopt following prescription
Clear water+6kg/m
3Carry stick+0.010m
3/ m
3Inhibitor+12kg/m
3Fluid loss agent+20kg/m
3Mud cake activator+200kg/m
3Soluble salt;
Carry stick in the following formula and adopt the modification xanthan gum, inhibitor adopts organic amine, and fluid loss agent is selected sulfonated phenolic resin SMP-II for use, and the mud cake activator is selected sulfonated gilsonite SAS for use, and soluble salt is selected KCL for use;
Prepare according to following steps:
(1) the required clear water amount of measuring and calculating drilling fluid is in clear water, according to weightmeasurement ratio 6kg/m
3Add the modification xanthan gum,, stirred 1 hour with 600 rev/mins;
(2) in the liquid of finishing the rapid preparation of previous step, according to volume ratio 0.010m
3/ m
3Add organic amine,, stirred 1 hour with 600 rev/mins;
(3) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 12kg/m
3Add sulfonated phenolic resin SMP-II,, stirred 1 hour with 600 rev/mins;
(4) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 20kg/m
3Add SAS,, stirred 0.5 hour with 600 rev/mins;
(5) in the liquid of finishing the rapid preparation of previous step, according to weightmeasurement ratio 200kg/m
3Add KCL,, stirred 1 hour, finish preparation, obtain not having solid phase strong rejection capability drilling fluid with 600 rev/mins, but 140 ℃ of this drilling fluid temperature resistances.
The no solid phase strong rejection capability drilling fluid that above-mentioned eight embodiment of the present invention obtain, the mud property that detects through the scene sees Table--the mud property table of eight embodiment of no solid phase strong rejection capability drilling fluid.
The mud property table of eight embodiment of no solid phase strong rejection capability drilling fluid
Among visible eight embodiment, the dehydration of drilling fluid can guarantee the long horizontal traverse well wellbore stability all less than 10ml in the table; And in hydrocarbon zone, less fluid loss to keeping original rerum natura on stratum, prevents that formation contaminant from playing a key effect.The present invention in the Dagang Oilfield shore 6 mouthfuls of wells such as dark 3 * 1 grades open liquid as brill and use, solved the technical barriers such as high-temperature stability, formation contaminant, sand shale hole instability and oilness of drilling fluid in the underbalance controlled pressure drilling of deep layer Shahe, this area street, permeability resume figure reaches more than 85%.
Claims (2)
1. a no solid phase strong rejection capability DRILLING FLUID FORMULATION is clear water, 4～6kg/m
3Carry stick, 0.008～0.012m
3/ m
3Inhibitor, 8～20kg/m
3Fluid loss agent, 20kg/m
3Mud cake activator and 200～300kg/m
3Soluble salt is characterized in that the clear water described in the above-mentioned prescription does not contain the process water of tensio-active agent for salinity after tested less than 3000ppm; Carrying stick is the modification xanthan gum, and modification xanthan gum molecular formula is (C
6H
10O
5) biological polymer of n; Inhibitor is an organic amine, and the exemplary configuration skeleton symbol is: NH
2(RCH
2CHO)
XCH
2RCHNH
2, R is for containing 1～6 carbon atom alkyl in the formula, and the x value is 1～10 integer; Fluid loss agent is a certain in the treatment agents such as treated starch, PAC-LV Polyanionic Cellulose, SMP-I, SMP-II sulfonated phenol formaldehyde resin; The mud cake activator is sulfonated gilsonite SAS; Soluble salt is KCL, K
2SO
4, wherein a certain such as HCOONa, HCOOK.
2. the preparation method of no solid phase strong rejection capability drilling fluid as claimed in claim 1, described according to its prescription, in clear water, add macromolecular host when it is characterized in that preparing earlier, add micromolecular other auxiliary treatment agent again, add soluble salt at last; Concrete steps are as follows:
(1) the required clear water amount of measuring and calculating drilling fluid in clear water, is carried stick according to the weightmeasurement ratio adding of setting, and with 600 rev/mins, stirs 1 hour;
(2) in the liquid of finishing the rapid preparation of previous step, add inhibitor according to the volume ratio of setting, with 600 rev/mins, stirred 1 hour;
(3) in the liquid of finishing the rapid preparation of previous step, add fluid loss agent according to the weightmeasurement ratio of setting, with 600 rev/mins, stirred 1 hour;
(4) in the liquid of finishing the rapid preparation of previous step, add the mud cake activator according to the weightmeasurement ratio of setting, with 600 rev/mins, stirred 0.5 hour;
(5) in the liquid of finishing the rapid preparation of previous step, add soluble salt according to the weightmeasurement ratio of setting, with 600 rev/mins, stirred 1 hour, finish configuration, obtain not having solid phase strong rejection capability drilling fluid.
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|---|---|---|---|
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|---|---|---|---|
| CN2011101003107A CN102226075A (en) | 2011-04-21 | 2011-04-21 | Formula and preparation method of solid-phase-free strongly-inhibitive drilling fluid |
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ID=44807074
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| CN102408883A (en) * | 2011-12-01 | 2012-04-11 | 中国石油集团渤海钻探工程有限公司 | Preparation method of high-temperature-resistant polyamine salt inhibitor for drilling fluid |
| CN103184037A (en) * | 2011-12-29 | 2013-07-03 | 中国石油化工股份有限公司 | Bio-enzyme solid-free completion fluid |
| CN103642472A (en) * | 2013-12-19 | 2014-03-19 | 中国石油集团渤海钻探工程有限公司 | Water-based highly inhibitive positive anti-sloughing drilling fluid |
| CN104099070A (en) * | 2014-05-16 | 2014-10-15 | 西南石油大学 | Solid free well killing fluid using salt extraction waste brine as base liquid and preparation method thereof |
| CN105273694A (en) * | 2014-06-15 | 2016-01-27 | 成都棕通石油配件有限公司 | Polymer drilling fluid |
| CN105295869A (en) * | 2014-06-15 | 2016-02-03 | 成都棕通石油配件有限公司 | Preparation method for polymer drilling fluid |
| CN107556990A (en) * | 2017-09-20 | 2018-01-09 | 中国石油集团渤海钻探工程有限公司 | It is a kind of to strengthen the organic salt drilling fluid suppressed with sealing characteristics |
| CN109944588A (en) * | 2019-03-19 | 2019-06-28 | 西南石油大学 | Optimization method of drilling fluid formulation for protection of high soluble salt porous reservoirs |
| CN116410708A (en) * | 2021-12-29 | 2023-07-11 | 中国石油天然气集团有限公司 | Gypsum pollution-resistant drilling fluid |
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| CN105273694A (en) * | 2014-06-15 | 2016-01-27 | 成都棕通石油配件有限公司 | Polymer drilling fluid |
| CN105295869A (en) * | 2014-06-15 | 2016-02-03 | 成都棕通石油配件有限公司 | Preparation method for polymer drilling fluid |
| CN107556990A (en) * | 2017-09-20 | 2018-01-09 | 中国石油集团渤海钻探工程有限公司 | It is a kind of to strengthen the organic salt drilling fluid suppressed with sealing characteristics |
| CN107556990B (en) * | 2017-09-20 | 2019-07-23 | 中国石油集团渤海钻探工程有限公司 | It is a kind of to strengthen the organic salt drilling fluid inhibited with sealing characteristics |
| CN109944588A (en) * | 2019-03-19 | 2019-06-28 | 西南石油大学 | Optimization method of drilling fluid formulation for protection of high soluble salt porous reservoirs |
| CN116410708A (en) * | 2021-12-29 | 2023-07-11 | 中国石油天然气集团有限公司 | Gypsum pollution-resistant drilling fluid |
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Application publication date: 20111026 |