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利用電測資料及最佳化法估算儲油層油-水界面之研究

Estimation of Oil-Water Contact by Using Well Logs Data and Optimization Method

摘要


本研究目的是利用電測資料估算油-水(氣-水)界面位置。所使用的電測資料包括自然電位差電測(SP)、自然伽碼電測(GR)、地層電阻電測(含深測徑電阻井測,中測徑電阻井測及淺測徑電阻井測等)、孔隙率電測等電測資料。本研究是利用岩心資料及及電測資料,採用最佳化法,先求得阿基參數(繞曲因子(a)、膠結因子(m)及飽和因子(n))後,分別代入含水飽和度分析法及液體界面分析法之方程式,而估算油-水界面位置(深度)。本研究先利用G油田的G-1井之岩心資料及電測資料求得阿基參數(繞曲因子(a)、膠結因子(m)及飽和因子(n)),分別建立含水飽和度計算模式及液體界面計算模式之後,再求得B-24、B-25及B-2井等四口井之油-水界面。

並列摘要


The purpose of this study is to estimate the depth of the oil-water contact (OWC) or gas-water contact (GWC) by well log data including spontaneous potential (SP), gamma ray Log (GR), resistivity logs, such as resistivity of deep, resistivity of medium, resistivity of shallow and porosity log. In this study, Archie's parameters, such as tortuosity factor (a), cementation factor (m), and saturation factor (n) are estimated from the optimization method of lithology and log data. The depths of the oil-water contact are calculated from saturation analysis and fluid contact equation analysis. In this study, Archie's parameters are estimated form lithology data and log data of G-1 well of G field. The depths of the oil-water contact of G-1, B-24, B-25, B-2 are obtained from saturation analysis and fluid contact equation analysis.

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