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Method for preparing drag reducer from modified MoS2

A drag reducer and modification technology, which is applied in the field of preparation of drag reducer based on modified MoS2, can solve the problems of limited water solubility, limited temperature resistance, and long time consumption, and achieve good water solubility and sand carrying capacity. The effect of increased reaction speed and good thermal stability

Active Publication Date: 2019-11-15
河南郸城顺兴石油助剂有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Method for preparing drag reducer from modified MoS2
  • Method for preparing drag reducer from modified MoS2
  • Method for preparing drag reducer from modified MoS2

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Embodiment 1

[0042] (1) Hydrophilic MoS 2Preparation of nanosheets: Dissolve hexammonium heptamolybdate and thiourea (molar ratio 1:7) in 35mL deionized water, then autoclave at 220°C for 18h, after the solution is cooled to room temperature, wash twice with water and wash with ethanol. Twice, washed once with water, and dialyzed against ultrapure water to remove unreacted reagents and impurities.

[0043] (2) Modified MoS 2 Preparation of ODA: add 0.25g ODA to 50mL deionized water, and ultrasonically dissolve ODA for 10min; add 2.5g hydrophilic MoS to another 50mL deionized water 2 Nanosheets, sonicated for 30min to make hydrophilic MoS 2 The nanosheets were fully dispersed and presented a monolayer state; finally, the ODA solution was slowly added to the hydrophilic MoS under ultrasonic conditions. 2 In the nanosheet dispersion, continue to sonicate the compound solution for 30 minutes; then pour the obtained mixture into a flat-bottomed flask, stir for 12 hours at a rotation speed of...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
CPCC09K8/604C09K8/665C09K8/68C09K8/882C09K8/885C09K8/90C09K2208/34
Inventor 侯吉瑞屈鸣黄保州许志辉赵家祥张德见刘星宇刘梦丹
Owner 河南郸城顺兴石油助剂有限公司
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