Efficient temperature resistance fluid loss agent for drilling fluid and preparation method thereof

Abstract

The invention discloses efficient temperature resistance fluid loss agent for drilling fluid and a preparation method thereof. The preparation method comprises the steps that firstly 200 to 230 parts of water are added into a reaction kettle to be heated to 50 to 60 DEG C; 15 to 18 parts of sodium hydroxide is added into the reaction kettle while being stirred; 25 to 40 parts of hydrolyzed polyacrylonitrile is added into the reaction kettle; finally 45 to 70 parts of decomposed coal is added into the reaction kettle; the mixture is heated to 80 to 85 DEG C; reaction is performed for 3 to 4 hours; obtained liquid is fed into drying equipment through a feeding pump; and then black brown spherical fine particle temperature resistance fluid loss agent is obtained. The efficient temperature resistance fluid loss agent is high in dissolving speed, can effectively reduce the loss amount during the drilling process, is in favor of protecting reservoir beds, has good temperature resistance, can be resistant to 200 DEG C, has a certain lubricating property, reduces the friction drag, improves the drilling speed, is simple in production technology, is not required to be cooled, and greatly reduces the labor intensity and the equipment use level, thereby reducing the production cost of enterprises and improving the economic benefit.

Description

technical field [0001] The invention relates to a petroleum drilling aid and a preparation method thereof, in particular to a high-efficiency temperature-resistant fluid loss reducer for drilling fluid used as a treatment agent for petroleum and natural gas drilling fluids and a preparation method thereof. Background technique [0002] With the increase of the world's energy demand and the development of drilling technology, the development of oil and gas in deep formations has become inevitable. This phenomenon is especially obvious in China. Due to the deep burial of resources, high technical requirements and difficult exploration technology, in this case Under the current situation, deep well drilling will definitely become an important development direction of China's petroleum industry. During the drilling process, due to the existence of formation temperature gradient and formation pressure gradient, the deeper the drilling depth, the higher the temperature and pressure...

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Problems solved by technology

[0002] With the increase of the world's energy demand and the development of drilling technology, the development of oil and gas in deep formations has become inevitable. This phenomenon is especially obvious in China. Due to the deep burial of resources, high technical requirements and difficult exploration technology, in this case Under the current situation, deep well drilling will definitely become an important development direction of China's petroleum industry. During the drilling process, due to the existence of formation temperature gradient and formation pressure gradient, the deeper the drilling depth, the higher the temperature and pressure in the well will become. Drilling fluid is easy to lose its original performance at high temperature. At the same time, high pressure can easily make the well wall unstable and induce downhole accidents such as long drilling. Therefore, how to deal with high temperature and high pressure is an important problem in the process of deep well drilling. From the point of view of drilling and oil and gas layer protection, fluid loss control agent is the most important treatment agent in drilling fluid. The requirements for salt resistance and salt resistance are getting higher and higher. Many performances of existing domestic drilling fluid fluid loss control agents are not very satisfactory and cannot fully meet the demand. The development progress and success rate are of great significance to the downhole safety of oil and gas well engineering, wellbore stability, oil and gas layer protection and even environmental protection.

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