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- Title
新型自降解压裂转向材料的合成与表征.
- Authors
张瀚澜; 赖小娟; 王鹏程; 杨文飞; 刘学文; 马锐; 曹建坤; 杨明亮
- Abstract
In view of the technical problem of insufficient temporary plugging ability of fracturing temporary plugging agent and unable to effectively remove the plugging after temporary plugging in the process of repeated fracturing construction, a novel turnaround fracturing material was developed by precipitation polymerization with maleic anhydride, styrene and butyl acrylate as synthetic monomers and benzoyl peroxide as initiator. The results of infrared characteristic analysis showed that each monomer polymerized into a polymer molecular chain. The thermal property test results show that the material had good thermal stability, the mass loss at 230 ℃ was only 10%, and the glass transition temperature was 165 ℃, which could maintain good mechanical strength at high temperature. The D50 value of the material had 12.82 μm and the particle size presents multi peak distribution, which had a broad-spectrum temporary plugging effect. The comprehensive performance evaluation results show that the temporary plugging and pressure bearing effect on fractures is higher than the fracturing pressure of direct core fracturing by 7 MPa, and the self-degrading time can reach 10 h at 90 ℃, which can effectively meet the needs of repeated fracturing time. The anti-pollution test results show that the material can resist the pollution of 10% sodium chloride, 10% calcium chloride and 10% sodium carbonate, and can accelerate the self-degrading rate of fracturing steering material by increasing the alkalinity of solution.
- Publication
Science Technology & Engineering, 2022, Vol 22, Issue 35, p15586
- ISSN
1671-1815
- Publication type
Article