Method for preparing high temperature-resistant and salt resistant fluid loss agent for drilling fluid

A fluid loss reducer, high temperature resistant technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of poor thermal stability, environmental pollution of oil-based drilling fluid fluid loss reducer, poor salt resistance, etc. , to prevent hydration and dispersion, adjust the flow pattern well, and achieve the effect of low cost

Active Publication Date: 2011-01-26
北京奥凯立科技发展股份有限公司
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Problems solved by technology

The oil-based drilling fluid fluid loss control agent has seriously polluted the environment. In recent years, the research and development of the fluid loss control agent for the water-based drilling fluid has become a hot topic; Technical defects of poor stability and poor salt resistance

Method used

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  • Method for preparing high temperature-resistant and salt resistant fluid loss agent for drilling fluid
  • Method for preparing high temperature-resistant and salt resistant fluid loss agent for drilling fluid
  • Method for preparing high temperature-resistant and salt resistant fluid loss agent for drilling fluid

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Embodiment Construction

[0017] The preparation method of the anti-high temperature and anti-salt fluid loss reducer for drilling fluid in this embodiment comprises the following steps:

[0018] (1) Raw material preparation: the mass ratio of 2-acrylamido-2-methylpropanesulfonic acid, acrylamide, lignite, water, initiator and auxiliary materials is: 2-acrylamido-2-methylpropanesulfonic acid : acrylamide: lignite: water: oxidation initiator: reduction initiator: auxiliary material = 2.5: 6: 8: 18: 0.15: 0.15: 27;

[0019] (2) Prepare mother liquor: add 2-acrylamido-2-methylpropanesulfonic acid and acrylamide into water respectively, and then add lignite while keeping the solution temperature at 60°C;

[0020] (3) Polymerization: add an oxidation initiator to the mother liquor under stirring conditions, react for 1 hour, then add a reduction initiator, and react for 1 hour;

[0021] (4) Add auxiliary materials;

[0022] (5) Drying and crushing: drying the mixture obtained in step (4) at 100° C., and c...

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Abstract

The invention relates to a method for preparing a high temperature-resistant and salt resistant fluid loss agent for drilling fluid. The method comprises the following steps of: (1) raw material preparation, wherein a mass ratio of 2-acrylamide-2-methylpropanesulfonic to acrylamide to lignitous coal to water to an initiator to an auxiliary material is 2-3:5-7:7-10:15-20:0.1-0.2:0.1-0.2:25-30; (2) mother solution preparation: adding the 2-acrylamide-2-methylpropanesulfonic and the acrylamide into the water respectively, and when keeping the temperature of the solution between 50 and 70 DEG C, adding the lignitous coal; (3) polymerization: adding an oxidative initiator into the mother solution under stirring to react for 1 hour, and then adding a reduction initiator to react for 1 hour; (4) addition of the auxiliary material; and (5) drying and crushing: drying the mixture obtained in the step (4) at the temperature of between 95 and 105 DEG C. The high temperature-resistant and salt resistant fluid loss agent for the drilling fluid has high heat stability and temperature resistance and salt resistance, can effectively reduce filtration, and is suitable for various water-base drilling fluid systems, particularly water-base drilling fluid systems with the high temperature resistance and salt resistance requirements.

Description

technical field [0001] The invention relates to a preparation method of a fluid loss control agent for drilling fluid, in particular to a preparation method of a fluid loss control agent for drilling fluid suitable for high temperature and high salinity conditions. Background technique [0002] With the development of oilfield exploration and development, in order to improve the effect of exploration and development, higher requirements are put forward for the drilling fluid's high temperature resistance, salt resistance, fluid loss reduction, carrying capacity and oil layer protection effect. The oil-based drilling fluid fluid loss control agent has seriously polluted the environment. In recent years, the research and development of the fluid loss control agent for the water-based drilling fluid has become a hot topic; The technical defects of poor stability and poor salt resistance. Contents of the invention [0003] The technical problem to be solved by the present inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/58C09K8/035
Inventor 卢丙朵王文瑞张亮亮顾新波张晓坡
Owner 北京奥凯立科技发展股份有限公司
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