摘要
对实测岩石孔隙压缩系数偏高的原因进行分析后认为,文献[1]提出孔隙压缩系数偏大的原因是受岩心表皮效应影响的这种认识并不全面,这种现象应在实验测试中的确存在,但这并非是导致实验结果偏大的主要原因,孔隙压缩系数计算公式对低孔隙度岩样的孔隙体积敏感性才是主要原因。在综合分析岩石所受应力的基础上,进一步提出了新的岩石孔隙压缩系数的校正式,该式克服了文献[1]提出的校正式的缺陷,可以较好地反映孔隙压缩系数随孔隙度的变化关系。上述研究成果,对于正确认识实验测试中异常值产生的原因,作适宜的校正以及油藏工程计算中的正确取值,有重要的意义。
Based on the Reference [1],the reason of higher measured rock compressibility is due to the skin effect of cores.This paper believes that this kind of effect does exist in lab experiment,but it is not the main reason of it.The main reason is that equation for porosity compressibility is sensible to porosity volume in low porosity sample.On the basis of comprehensive analysis of rock stress,this paper proposes a new regulation equation,which gets over the fault of equation from the Reference [1] and provides right relationship of compressibility vs porosity.These results are significant to correct understanding of the reason of higher measured rock compressibility in lab experiment,proper correction and computation of it in reservoir engineering.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2011年第1期102-103,共2页
Xinjiang Petroleum Geology
关键词
孔隙度
压缩系数
应力
敏感性
porosity
compressibility coefficient
stress
sensitivity
