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以往研究碳酸盐岩裂缝孔隙度时设计了两种孔隙结构的体积模型,其响应方程为φf=[R_(mf)(C_(xo)-C_t)]~1/~(mf)该式在使用时受限制较多,如要求 R_w≈R_(mf),只能在 R_t>R_(xo)井段中使用,并规定深侧向探测范围内无泥浆侵入,而浅侧向探测范围内孔隙完全被泥浆滤液所充满。这一要求与实际相差较大,利用该式计算出的φf 太低,以至一些地质问题不能解决。本文利用双侧向测井信息提出一个新的模型,并建立起响应方程。在任丘油田震旦系白云岩油藏应用,效果较好。
In the past, the volume model of two kinds of pore structures was designed when studying the porosity of carbonate fractures. The response equation is: φf = [Rmf (C_ (xo) - C_t)] ~ 1 / It is limited when it is used. If R_w≈R_ (mf) is required, it can only be used in the interval R_t> R_ (xo), and there is no mud invasion in the deep lateral detection range, Fully filled with mud filtrate. This requirement is quite different from the actual use of the formula calculated φf is too low, and even some of the geological problems can not be solved. In this paper, a new model is proposed based on double lateral logging information and a response equation is established. In Renqiu Oilfield Sinian dolostone reservoir application, the effect is better.