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火成岩在岩性上远远复杂于碎屑岩和碳酸岩。岩性识别是储层评价的基础,提高岩性判断符合率一直是火成岩储层研究中的难题,常规测井交会图识别岩性方法比较常用,但直接应用两种测井曲线交会识别火成岩岩性效果不是很好,本文鉴于火成岩储层岩性识别复杂而且成功率低这一实际情况,采用新疆油田K92井区和DX地区资料做分析,建立岩心—测井数据库,然后对火成岩岩性响应敏感的自然伽玛测井曲线进行分段,将大类岩性划分出来,然后应用多种曲线进行两两交会,进行火成岩的测井岩性识别研究,在工区取得了很好的应用效果。
Igneous rocks are much more complicated in lithology than clastic rocks and carbonate rocks. Lithology identification is the basis of reservoir evaluation. Increasing the coincidence rate of lithology judgment has always been a difficult problem in igneous reservoir research. Conventional logging cross-cut maps are more commonly used to identify lithologies. However, the intersection of two types of logging curves can directly identify igneous rocks In view of the fact that the lithology of the igneous reservoir is complex and the success rate is low, this paper uses the data of K92 and DX in Xinjiang Oilfield to do the analysis to establish the core-well database and then analyzes the lithology response of igneous rocks Sensitive gamma ray logging is divided into several segments to classify the lithology of large classes. After that, a variety of curves are used for intersecting each other, and logging lithology identification of igneous rocks is made, and good application effects are obtained in the work area.