摘要
对13个岩样采用不同围压测试其渗透率,实验结果表明:①应用围压1.5MPa完全能够密封岩样;②同一岩样采用行业标准规定的围压上限和下限值,渗透率值有降低的趋势,平均降幅达26.27%;③渗透率降低幅度与岩样渗透率范围有关,渗透率较高的岩样受围压影响可以忽略,但低渗透岩样受围压影响较大,应用时要考虑其误差;④渗透率降低幅度与岩性无关。
In this paper, the permeability values of 13 rock samples with different confining pressures are tested. The experimental results show that applied confining pressure Of 1.5 MPa is enough to seal the rock samples; there is a falling trend of permeability values from the same rock sample with an average decline up to 26.27% when the confining pressures are within the upper and lower limit of industry-standards suggested pressures; permeability decreasing amplitude is related to the original permeability of rock samples, the effect of confining pressure on high-permeability rock samples can be ignored, but that on low-permeability ones is obvious, and the errors should be considered when using these data; permeability decreasing amplitude is independent of lithology.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2010年第4期406-407,共2页
Xinjiang Petroleum Geology
关键词
渗透率
测试
围压
岩性
permeability
measurement
confining pressure
lithology
