四川盆地X井区五峰组-龙马溪组页岩岩相特征研究  

Study on Shale Facies Characteristics of Wufeng-Longmaxi Formation in X Well Area,Sichuan Basin

作　　者：张海杰 罗彤彤 邢亚冰 张笠 孟森淼[2] 王仲旭 Zhang Haijie;Luo Tongtong;Xing Yabing;Zhang Li;Meng Senmiao;Wang Zhongxu(Chongqing Shale Gas Exploration and Development Co.,Ltd.,Chongqing,China;Chuanqing Drilling&Exploration Engineering Co.,Ltd.Geological Exploration and Development Research Institute,Chengdu,China;College of Petroleum and Natural Gas Engineering,Chongqing University of Science and Technology,Chongqing,China)

机构地区：[1]重庆页岩气勘探开发有限责任公司,重庆 [2]川庆钻探工程有限公司地质勘探开发研究院,四川成都 [3]重庆科技大学石油与天然气工程学院,重庆

出　　处：《科学技术创新》2025年第7期52-55,共4页Scientific and Technological Innovation

摘　　要：四川盆地海相页岩岩相粒度小,非均质性强等特点,岩相测井识别难度高、精度低,亟需技术方法创新。本文以四川盆地X井区五峰组-龙马溪组为例,综合利用岩心、分析化验、常规测井等资料,对岩相类型进行划分并通过BP神经网格算法完成岩相测井识别。研究区五峰组-龙马溪组主要岩相类型包括6种,富有机质硅质页岩、中有机质硅质页岩、中有机质混合质页岩、贫有机质硅质页岩、贫有机质混合质页岩与贫有机质黏土质页岩,TOC含量的大小与页岩孔隙度的大小呈一定的正相关性,富有机质硅质页岩孔隙度较高,为勘探开发主要优质页岩岩相类型,垂向主要分布在龙马溪组下部以及五峰组的上部。The marine shale in Sichuan Basin has the characteristics of small grain size and strong heterogeneity.It is difficult to identify the lithofacies by logging,and the accuracy is low.It is urgent to innovate the technical methods.In this paper,the Wufeng Formation-Longmaxi Formation in the X well area of the Sichuan Basin is taken as an example.The lithofacies types are divided by comprehensive utilization of core,analytical test,conventional logging and other data,and the lithofacies logging identification is completed by BP neural network grid algorithm.The main lithofacies types of the Wufeng Formation-Longmaxi Formation in the study area include six types:organic-rich siliceous shale,medium-organic siliceous shale,medium-organic mixed shale,poor-organic siliceous shale,poor-organic mixed shale and poor-organic clay shale.The size of TOC content is positively correlated with the size of shale porosity.The porosity of organic-rich siliceous shale is high,which is the main high-quality shale lithofacies type for exploration and development.Vertically,it is mainly distributed in the lower part of the Longmaxi Formation and the upper part of the Wufeng Formation.

关 键 词：龙马溪组 海相页岩 岩相类型 

分 类 号：P618.13[天文地球—矿床学]