王府凹陷青山口组含油气泥页岩层的测井曲线标准化  

Normalization of logging data of oil bearing mud shale of Qingshankou formation in Wangfu depression

作　　者：肖佃师 黄文彪 张小刚 任欢颂 郭思祺 

机构地区：[1]中国石油大学(华东)非常规油气与新能源研究院,山东青岛266580 [2]中国石油长庆油田分公司长庆油田勘探部,陕西西安710018

出　　处：《东北石油大学学报》2014年第1期46-53,116,共9页Journal of Northeast Petroleum University

基　　金：国家自然科学基金项目(40972101);中央高校基本科研业务费专项资金资助(27R1321001A)

摘　　要：泥页岩富含有机质、非均质性强,相同岩性地层测井响应差异大,稳定标准层选取困难.根据王府凹陷青山口组泥页岩地质特征,利用声波和电阻率曲线组合识别出多套低有机质泥岩层和富有机质页岩层,构建两套"视标准层";结合趋势面法进行特征值分析,有效降低有机非均质性对测井曲线的影响,实现泥页岩层曲线标准化;利用有机碳TOC建模对标准化效果进行验证.结果表明:泥页岩层曲线标准化后计算TOC值与实测值基本吻合,与标准化前相比平均相对误差减小24.1%.这种方法可以在有机非均质性强、缺乏稳定标准层的泥页岩层中实现测井曲线的标准化.Organic and inorganic heterogeneity evaluation with logging curves is the key to shale oil and gas exploration,the logging normalization ensures the effect of interpretation models by reducing the system error among the multiple well.Therefore,logging normalization directly affects the precision of heterogeneity evaluation of oil bearing mud shale.Because of the strong heterogeneity,the marker bed with the characteristics of uniform lithology and similar curve response is difficult to be optimized in oilbearing mud shale which restricts logging normalization in mud shale.According to the geological characteristics of mud shale of Qingshankou Formation in Wangfu Depression,both virtual marked beds are built by establishing multi low-organic mudstone and high-organic mudstone with the combination of sonic and resistivity curves which reduce the effect of heterogeneity,the marker bed values are determined with the trend surface analysis,and then the log normalization can be achieved.The normalization curve is applied to the TOC evaluation,and the TOC value calculated with normalization curve is in agreement with the measured data,compared with TOC value calculated with original curve,the average relative error of TOC calculated decreases by 24.1%.This method can be applied to curve normalization in mud shale with the characteristics of strong heterogeneity and lacking stable marked bed.

关 键 词：王府凹陷 青山口组 曲线标准化 泥页岩 TOC评价 标准层 趋势面分析 

分 类 号：TE121[石油与天然气工程—油气勘探]