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青海油田现在进入中高含水开发期,一方面,需要对单井进行层调、补孔、寻找潜力层、堵水作业;另一方面,许多老井受到当时条件的限制,录取的地质资料过少,不能满足油田后期再开发。所以青海油田测试公司在2007年从奥地利引进PNN饱和合度测井仪器,力争为油田二次开发做出贡献。通过对青海油田主力油田进行PNN饱和度测井,结合裸眼井资料、井况以及该井的生产史资料,总结分析对PNN饱和度测井解释的主要影响因素:(1)岩性分析;(2)地层水矿化度;(3)孔隙度和泥质含量;(4)求取SIGMA曲线;(5)综合分析。通过对这些因素的把握,提高了PNN饱和度资料解释的准确性。
Qinghai Oilfield is now entering a period of high and medium water-cut development. On the one hand, it is necessary to stratify and fill up individual wells to find potential reservoirs and block water operations. On the other hand, many old wells are limited by the conditions at that time and too few geological data are admitted , Can not meet the oilfield and then redevelopment. Therefore, Qinghai Oilfield Testing Company introduced the PNN saturation coincidence logging instrument from Austria in 2007 in an effort to contribute to the secondary development of the oilfield. Through the PNN saturation logging in the main oilfields of Qinghai Oilfield, the main influencing factors of PNN saturation logging interpretation are analyzed and summarized according to the open hole data, well conditions and production history data of the well: (1) lithology analysis; ( 2) Formation water salinity; (3) Porosity and shale content; (4) Calculating SIGMA curve; (5) Comprehensive analysis. By grasping these factors, the accuracy of PNN saturation data interpretation is improved.