史彪,吴丰,李树新,梁芸,习研平,代槿,石祥超,赵辉

• 1:西南石油大学地球科学与技术学院
• 2:中石油煤层气有限责任公司
• 3:中国石油西部钻探工程有限公司地质研究院
• 4:西南石油大学石油与天然气工程学院

摘要(Abstract)：

鄂尔多斯盆地东南缘海陆过渡相地层矿物组成复杂，页岩与砂岩、煤等岩性频繁交互，岩性纵向变化快。由于常规测井曲线分辨率较低，且扩径现象普遍，导致海相页岩气评价中常用的岩性识别与优质页岩识别方法效果较差。首先利用反褶积技术提高自然伽马、无铀伽马和铀测井曲线分辨率，然后通过测井交会图组合图版分别识别海陆过渡相地层岩性和页岩岩相，进一步通过新提出的铀-自然电位曲线重叠法识别海陆过渡相优质页岩。结果表明：反褶积技术能有效提高自然伽马、无铀伽马和铀曲线分辨率，利用自然伽马-密度测井交会图识别海陆过渡相地层岩性效果较好；铀-无铀伽马交会图能进一步识别3种岩相页岩(钙质硅质页岩、硅质黏土质页岩和黏土质页岩);在海陆过渡相地层中，新提出的铀-自然电位重叠法比传统ΔlogR法识别优质页岩效果更好。本研究可为海陆过渡相页岩气储层测井评价提供理论支持，提高优质页岩识别准确率。

关键词(KeyWords)： 鄂尔多斯盆地;海陆过渡相;页岩气;反褶积;测井;岩性识别;优质页岩

Abstract:

Keywords:

基金项目(Foundation): 中国石油-西南石油大学创新联合体科技合作项目(2020CX030103);; 四川省重点研发计划(重大科技专项)项目(2020YFSY0039);; 国家自然科学基金区域创新发展联合基金项目(U20A20266)

作者(Author): 史彪,吴丰,李树新,梁芸,习研平,代槿,石祥超,赵辉

DOI: 10.19509/j.cnki.dzkq.2022.0107

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