Author(s)

Xiong Wang¹, Lejun Liao², Ru Bai², Fu Liu³, Wenwu Zheng³, Song Wang^1*

¹College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou, China.
²Xianyang Chuanqing Xinyuan Co., Ltd, Xianyang, China.
³Sinopec North China Petroleum Engineering Co., Ltd, Zhengzhou, China.

In view of the shortcomings of poor temperature resistance, poor pumpability and poor pressure-bearing capacity of commonly used gel plugging materials, polyacrylamide (HPAM) and N,N-methylene bisacrylamide (BIS) were selected for crosslinking and compounding to make a new type of gel plugging material with high temperature and pressure resistance. The compressive strength and yield stress were measured by inverted observation method to evaluate the gel strength. The anti-temperature, anti-pressure, anti-dilution and gel-breaking properties of the gel were evaluated. Finally, 71 type high temperature and high pressure water loss instrument and high temperature and high pressure filter with slit plate were used to evaluate the plugging capacity of gel plugging agent. The experimental results show that the new gel plugging system between 100°C - 120°C, gelation time can be controlled at about 5 h; it has strong temperature resistance, compression resistance, dilution resistance and gel breaking performance. In the face of permeability and fracture leakage simulation experiments, when the ambient temperature below 120°C, pressure within 5 MPa, the filter loss of gel plugging agent is far less than the market two conventional plugging agent, has excellent plugging performance.

Changqing Oilfield, Leakage, New Gel Plugging Agent, Gel Strength, Temperature and Salt Resistance, Plugging Performance

Wang, X. , Liao, L. , Bai, R. , Liu, F. , Zheng, W. and Wang, S. (2022) Study on Plugging Technology in Oil Test. Open Journal of Yangtze Oil and Gas, 7, 240-252. doi: 10.4236/ojogas.2022.74014.