基于Fault Likelihood属性分区标定的裂缝预测与三维地质建模——以川西坳陷新场气田须二段气藏为例  

Fracture prediction and 3D geological modeling based on partition calibration of Fault Likelihood attribute:a case study of the 2nd member of Xujiahe Formation in Xinchang Gas Field,West Sichuan Depression,Sichuan Basin

作　　者：商晓飞[1] 王鸣川[1] 李蒙 SHANG Xiaofei;WANG Mingchuan;LI Meng(Research Institute of Petroleum Exploration and Production,SINOPEC,Beijing 102206,China)

机构地区：[1]中国石油化工股份有限公司石油勘探开发研究院,北京102206

出　　处：《东北石油大学学报》2022年第4期62-76,I0005,I0006,共17页Journal of Northeast Petroleum University

基　　金：中国石油化工股份有限公司科技部项目(P21038-3);中国石油化工股份有限公司科技部项目(P18089-3)。

摘　　要：川西坳陷新场地区须家河组二段(须二段)天然裂缝发育,储层整体致密。基于Fault Likelihood(FL)属性提取、预处理,结合钻井资料揭示裂缝发育程度,通过构造单元分区进行裂缝井震标定,确定每一构造单元的裂缝响应阈值,采用等比例归一化方法,整合各分区调整后的属性,进行裂缝预测与三维地质建模。结果表明:经过分区标定的FL属性与钻井裂缝吻合率超过85%,与倾角大于30°的有效裂缝密度相关关系最好,提高基于FL属性对裂缝探测的准确度;三维裂缝地质模型能够准确反映储层裂缝及其参数的空间分布,为新场气田须二段致密砂岩气藏产能建设提供定量化数据基础。The reservoir of the 2nd member of Xujiahe Formation in Xinchang Area of Western Sichuan Depression is relatively tight and more natural fractures are developed.Based on Fault Likelihood(FL)attribute extraction and preliminary treatment,combined with the fracture development revealed by drilling wells,the calibration between well and seismic was carried out through the structural unit partition,and the fracture response threshold interval of each structural unit was determined.Furthermore,the equal-scale normalization method was used to integrate the adjusted attributes of each structural unit.The results show that the coincidence rate of FL attribute with drilling fractures after partition calibration is more than 85%,and the correlation between FL attribute and effective fracture density with dip angle greater than 30° is the best,which greatly improves the accuracy of FL attribute in fracture prediction.Based on FL partition calibration technology,a 3D geological model of fracture is established,which can reflect the spatial distribution of fractures and their parameters more accurately,and provide more accurate quantitative data guarantee for productivity construction of Xinchang tight sandstone gas reservoir.

关 键 词：Fault Likelihood属性 裂缝预测 裂缝建模 须二段 新场气田 川西坳陷 

分 类 号：TE122.113[石油与天然气工程—油气勘探]