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以前已研究出用电测井数据估算储集层渗透率的几种关系式。遗憾的是,这几种关系式并非普遍有效,因为每种关系式与该井局部的岩性、储集的流体性质及分布情况有极大关系,故需研究出用于尼日尔三角洲盆地储集岩的关系式。 作者运用多元回归分析方法,以测井所取得的孔隙度和残余水饱和度为依据,研究出了东尼日尔三角洲未固结砂体渗透率的经验表达式。本文用了218组现场实测数据,将新的表达式与以前的那些关系式进行了比较,发现新的表达式所计算出的渗透率更准确。 这个表达式对其他产油区可能有效,只要所给出的储集岩和流体性质与东尼日尔三角洲未固结砂体相似。
Several relationships have been developed previously for estimating reservoir permeability using electrical logging data. Unfortunately, these relations are not universally valid, since each relationship has a strong relationship to the local lithology of the well, the nature and distribution of fluids in the reservoir, and the need to develop a reservoir for the Niger Delta Basin Rock’s relationship. Using multivariate regression analysis and based on the porosity and residual water saturation obtained from the logs, the authors developed an empirical expression of the unconsolidated sand permeability in the East Niger Delta. In this paper, 218 sets of field measurements are used to compare the new expressions with those of the previous ones. It is found that the permeability calculated by the new expressions is more accurate. This expression may be valid for the other oil producing zones provided that the reservoir rocks and fluid properties given are similar to the unconsolidated sand bodies of the East Niger Delta.