摘要
通过对陕 141井区上古生界山 2储层的毛管压力曲线和岩电实验资料的研究 ,认为阿尔奇公式中的电阻率因素F不但与储层孔隙度、孔隙的曲折度有关 ,而且与储层的孔喉比有关 ,当孔隙度一定时 ,孔喉比越小 ,F值越低 ;地层电阻率指数n值的大小主要受储层孔喉比的影响 ,当储层为孔喉比等于 1的管状孔时 ,n等于 1,值最小。孔喉比越大 ,n值越大。其原理是当孔隙饱含油时 ,不仅导电体截面减小 ,而且导电体长度增加。
It is discovered by the experimental study on Shan-2 Paleozoic reservoir of Shan-141 well area that the resistivity factor F in Archie's Formula is not only related with the porosity and tortuousity of the pore but also related with the throat of the pore as well. When the throat rate =1, the minimum of n is 1, when the throat becomes larger, n becomes larger accordingly. It is concluded that the smaller the ratio of the pore throat ,the lower the Value F is. The size of Value n of the reservoir resistivity index is chiefly effected by the ratio of the pore throat .The theory is that when the pore is full of oil , the layer of the conductor decreases and the length of it increases.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
2002年第4期364-367,共4页
Oil & Gas Geology
