基于叠前反演的泥页岩地层压力预测方法  

Prediction method of shale formation pressure based on pre-stack inversion

作　　者：李玉凤 孙炜[2] 何巍巍[3] 杨云飞 章新文 严移胜 LI Yufeng;SUNWei;HEWeiwei;YANG Yunfei;ZHANG Xinwen;YAN Yisheng(School of Geophysics and Information Technology,China University of Geosciences,Beijing 100083,China;State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development,ResearchInstitute of Exploration & Production,Sinopec,Beijing 100083,China;PetroChina Research Institute ofPetroleum Exploration and Development-Northwest,Lanzhou 730020,China;Research Institute ofExploration and Development,PetroChina Henan Oilfield Company,Zhengzhou 450018,China)

机构地区：[1]中国地质大学(北京)地球物理与信息技术学院,北京100083 [2]中国石化石油勘探开发研究院页岩油气富集机理与有效开发重点实验室,北京100083 [3]中国石油勘探开发研究院西北分院,兰州730020 [4]中国石油河南油田分公司勘探开发研究院,郑州450018

出　　处：《岩性油气藏》2019年第1期113-121,共9页Lithologic Reservoirs

基　　金：中国石化科技部基础前瞻项目"碳酸盐岩层系异常地层压力预测方法研究"(编号:G5800-16-ZS-KJB043);国家重点基础研究发展计划(973)课题"陆相页岩油富集要素与有利区预测"(编号:2014CB239100)联合资助

摘　　要：为了解决泥页岩地层压力预测问题,以焦石坝地区志留系龙马溪组页岩气储层为研究对象,调研分析了现今常用地层压力预测方法的适用性。在对页岩气储层异常压力发育段进行测井响应特征分析的基础上,提出能够有效识别页岩气异常地层压力的新参数,即异常地层压力识别因子;最后利用叠前弹性波阻抗反演结果计算出异常地层压力识别因子,从而预测焦石坝地区泥页岩地层的压力分布特征。与传统预测方法相比,基于叠前弹性波阻抗反演的泥页岩地层压力预测新方法具有更高的精度。该研究成果可以应用于泥页岩地层的压力预测,为页岩气精细勘探提供了依据。With the deep exploration and development of shale gas,formation pressure prediction has become an urgent problem to be solved. Taking shale gas reservoir of Silurian Longmaxi Formation in Jiaoshiba area as the research object,the applicability of traditional formation pressure prediction methods was analyzed. Based on the analysis of logging response characteristics of abnormal pressure development zone of shale gas reservoir,a new parameter,namely abnormal formation pressure factor,was proposed to effectively identify abnormal formation pressure of shale gas. The pre-stack elastic impedance inversion result was used to calculate the abnormal formation pressure factor,so as to predict the pressure distribution characteristics of shale formation in Jiaoshiba area.The prediction result of the new method shows higher accuracy than that of the traditional method. This research results can be applied to pressure prediction of shale formation and provide a theoretical reference for fine explo-ration of shale gas.

关 键 词：异常地层压力 弹性波阻抗反演 压力预测 页岩气 

分 类 号：TE121.34[石油与天然气工程—油气勘探]