湖相页岩油层孔隙度井-震双控建模  

Well-seismic dual-control modeling of lacustrine shale oil reservoir porosity

作　　者：欧成华[1,2] 王泽宇 闫博 张连进 彭仕轩 张飞 毛正林 徐睿 薛赛红 OU Chenghua;WANG Zeyu;YAN Bo;ZHANG Lianjin;PENG Shixuan;ZHANG Fei;MAO Zhenglin;XU Rui;XUE Saihong(Petroleum Engineering School,Southwest Petroleum University,Chengdu 610500,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu 610500,China;Exploration and Development Research Institute,Southwest Oil&Gas Field Company,PetroChina,Chengdu 610500,China;Development Department of Southwest Oil and Gas Field Company,PetroChina,Chengdu 610500,China;Qilicun Oil Production Plant,Yanchang Oilfield Co.,Ltd.,Xi′an 717100,China)

机构地区：[1]西南石油大学石油与天然气工程学院,四川成都610500 [2]油气藏地质及开发工程全国重点实验室,四川成都610500 [3]中国石油西南油气田分公司勘探开发研究院,四川成都610500 [4]中国石油西南油气田分公司开发事业部,四川成都610500 [5]延长油田股份有限公司七里村采油厂,陕西西安717100

出　　处：《断块油气田》2024年第6期1021-1030,共10页Fault-Block Oil & Gas Field

基　　金：四川省科技计划项目“湖相混积页岩水平井原位表征与开采效果三维可视化评价”(2021YFQ0049);国家“十三五”重大专项课题“页岩气藏地球物理响应与优质储层识别”(2017ZX05035003)。

摘　　要：针对我国湖相页岩油分布范围广,储层岩性复杂、单层厚度薄、储集物性差、纵横向非均质性强等地质特征,提出了湖相页岩油层孔隙度井-震双控建模技术系列:1)岩心标定测井。测井识别湖相页岩岩相并解释出孔隙度参数,采用层控方法建立岩相三维模型,利用层控加岩相控制策略建立测井孔隙度三维模型。这虽保证了湖相页岩油层孔隙度模型的纵向预测精度,但横向预测精度不足。2)地震属性提取与优化。经过测井解释孔隙度粗化,采用遗传反演方法,结合时深转换,建立深度域地震孔隙度三维模型,完成对湖相页岩油层的横向非均质性精细刻画。此结果的纵向非均质性刻画精度有限。3)井-震双控孔隙度建模技术。依靠建模方法优选与参数优化,以测井孔隙度三维模型为主变量,地震孔隙度三维模型为次变量,完成井-震双控孔隙度建模及可靠性检验,实现对湖相页岩油层孔隙度的可靠表征。In view of Chinese lacustrine shale oil has geological characteristics such as wide distribution,complex reservoir lithology,thin single layer thickness,poor reservoir physical property and strong vertical and horizontal heterogeneity,a series of well-seismic dual-control modeling technologies for lacustrine shale oil reservoir porosity are proposed.(1)Core calibration logging.Logging identifies lacustrine shale lithofacies and explains the porosity parameters.Formation control method is used to establish a three-dimensional lithofacies model,and a three-dimensional logging porosity model is established by using formation control and lithofacies control strategy.This ensures the accuracy of vertical prediction of lacustrine shale oil reservoir porosity model,but the accuracy of horizontal prediction is insufficient.(2)Seismic attribute extraction and optimization.Through coarsening the logging interpretation porosity,using genetic inversion method combined with time-depth conversion,a three-dimensional seismic porosity model in depth is established to complete the fine characterization of horizontal heterogeneity of lacustrine shale oil reservoir.The accuracy of the vertical heterogeneity characterization is limited.(3)Well-seismic dual-control porosity modeling technology.Based on the optimization of modeling methods and parameter optimization,the well-seismic dual-control porosity modeling and reliability testing are completed with the three-dimensional logging porosity model as the main variable and the three-dimensional seismic porosity model as the secondary variable,and the reliable characterization of lacustrine shale reservoir porosity is realized.

关 键 词：湖相页岩油 井-震双控 地质建模 岩相分析 遗传反演 

分 类 号：TE132.1[石油与天然气工程—油气勘探]