A Gel-Based Solidification Technology for Large Fracture Plugging  

作　　者：Kunjian Wang Ruibin He Qianhua Liao Kun Xu Wen Wang Kan Chen 

机构地区：[1]Tianjin Branch of CNOOC(China)Co.,Ltd.,Tianjin,300450,China [2]Jingzhou Jiahua Technology Co.,Ltd.,Jingzhou,434001,China

出　　处：《Fluid Dynamics & Materials Processing》2024年第3期563-578,共16页流体力学与材料加工（英文）

基　　金：“Research and Application of Key Techniques for Drilling and Completion of Bozhong 19-6 Condensate Gas Field Development-Phase I”sub topic 4“Research on Leakage Prevention and Plugging Techniques for Fault and Buried Hill Reservoirs”,a Project of China National Offshore Oil (China)Co.,Ltd. (Project No.YXKY-2020-TJ-03).

摘　　要：Fault fractures usually have large openings and considerable extension. Accordingly, cross-linked gel materials aregenerally considered more suitable plugging agents than water-based gels because the latter often undergo contaminationvia formation water, which prevents them from being effective over long times. Hence, in this study, aset of oil-based composite gels based on waste grease and epoxy resin has been developed. These materials havebeen observed to possess high compressive strength and resistance to the aforementioned contamination, therebyleading to notable increase in plugging success rate. The compressive strength, thickening time, and resistance toformation water pollution of these gels have been evaluated indoors. The results show that the compressivestrength of the gel can reach 11 MPa;additionally, the related gelation time can be controlled to be more than3 h, thereby providing a safe construction time;Invasion of formation water has a small effect on the gel strengthand does not shorten the thickening time. All considered performance indicators of the oil-based gel confirm itssuitability as a plugging agent for fault fractures.

关 键 词：Drilling loss fault fracture oil-based gel compressive strength gel plugging 

分 类 号：TQ427.26[化学工程]