致密碎屑岩裂缝气层的自然电位

SPONTANEOUS POTENEIAL OF FRACTURED GAS-BEARING FORMATION OF COMPACT CLASTIC ROCK

西南石油地质局测井站

Weil-Logging Blation, of

利用测井信息判别裂缝的方法很多,本文介绍了用自然电位指示裂缝、判别出气位置的实用研究成果。文中给出了一个简明直观的判别指数FP,其应用范围限于裂缝起控制作用的致密碎屑岩含气储层。同时,对于那些地层水矿化度差异较大的地层,利用电阻率(R_t)-“假自然电位”(FSP²)交会图判别流体性质具有快速直观的效果。

Supposedly,there should be a bunch of methods to disv:riminate fractu:e using well log intorttration. This paper prescnts the positive research result achieved. That's through fracture indication by spoa,taneous poiential to pinpoint the localion where gas-pralucing is expected. fin explicit and directly-perceived discriminant exponent FP is given in the paper. But its application is confined to the fractured gas-bearing reservoir of compact Mastic rocic.Iviean Whiie,for ahc}se formalions with noticeable differences in mineralization of forr}u.tion water,one can find the outcorne readily just by iooicing at FSP (false spontaneous potential)-R_t(resistivity) crosspfot when resolving the differences in fluid property.