Method for preparing drag reducer from modified MoS2

Abstract

The invention discloses a method for preparing a drag reducer from modified MoS2, and relates to the technical field of petroleum development. The method comprises the following steps: (1) preparationof the modified MoS2; (2) preparation of a modified MoS2 suspension; (3) preparation of a polymer; and (4) preparation of the drag reducer. The drag reducer prepared in the invention has a good thermal stability, so the product can be stored at room temperature for 30 d without flocculation and sedimentation; the product has good water-soluble dissolving ability, so the product can be fully dissolved in different water solutions, can be still uniformly dispersed after being subjected to gel breaking at a high temperature of 130 DEG C, and breaks through the technical problem of poor thermal stability of the drag reducer due to too high temperature; and the product has the advantages of low concentration and high efficiency, so the order of magnitude of the concentration of the drag reducer is reduced.

Description

Technical field: [0001] The invention relates to the technical field of petroleum development, in particular to a modified MoS 2 Method for preparing drag reducer. Background technique: [0002] After the production of oil wells reaches a certain stage, the production capacity and permeability decrease. In order to enhance the oil drainage capacity and increase the production of oil wells, people invented fracturing technology. Fracturing technology is an important method widely used in the development of conventional or unconventional oil and gas fields as a contemporary technology for increasing production of oil and gas reservoirs. The fracturing fluid needs to have enough viscosity to create fractures in the reservoir and promote the fracture to expand into the reservoir, carry sand (proppant) from the ground into the fracture and make the proppant evenly distributed in the fracture, and close the fracture in the proppant-filled layer The gel-breaking flowback after to...

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Problems solved by technology

[0004] Existing drag reducers are mostly composed of cationic active agents such as acrylic acid, acrylamide, Span80, Tween80 and non-ionic active agents. References include: (1) Cheng Jun, Pei Jingui, Xu Fanghai, Wu Xiangyang. A new type Synthesis and Application of Drag Reducing Agent for Slippery Water Fracturing Fluid[J]. Contemporary Chemical Industry, 2016, 45(03): 456-459. / (2) Guo Hao, Liu Qingwang, Guo Jianshe, Fan Zhenzhong, Wei Xiaoming, Liu Yongqing. Molecule Application of simulation in the synthesis of hydrophobic association drag reducers[J].Modern Chemical Industry,2019,39(03):210-214. However, the compounding process of existing drag reducers is cumbersome and the temperature resistance is limited (Tmax≤85 ℃), water-soluble solubility is limited, compatibility preparation takes too long, the highest resistance reduction rate is only 71%, and the sand-carrying reaction speed is slow

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