基于VTI介质的叠前弹性阻抗反演方法应用——以川西坳陷须家河组致密砂岩裂缝性储层为例  

Application of pre-stack elastic impedance inversion method based on VTI medium: A case of tight sandstone fractured reservoir in Xujiahe Formation, Western Sichuan Depression

作　　者：韩磊[1] 刘俊州[1] 杨睿 张广智[2] 周游 HAN Lei;LIU Junzhou;YANG Rui;ZHANG Guangzhi;ZHOU You(Sinopec Petroleum Exploration and Production Research Institute,Beijing 100083,China;School of Geoscience,China University of Petroleum(East China),Qingdao,Shandong 266580,China)

机构地区：[1]中国石化石油勘探开发研究院,北京100083 [2]中国石油大学(华东)地球科学与技术学院,山东青岛266580

出　　处：《油气藏评价与开发》2022年第2期313-319,328,共8页Petroleum Reservoir Evaluation and Development

基　　金：国家科技重大专项“中西部地区碎屑岩领域勘探关键技术”(2016ZX05002-005);国家自然科学基金项目“基于深度学习的深层裂缝储层参数地震反演方法”(42074136)。

摘　　要：四川须家河组致密砂岩裂缝性储层储量丰富,但非均质性较强。重点分析川西坳陷须家河组致密砂岩裂缝性储层的实际情况,针对致密砂岩裂缝性储层呈现非均质的特点,基于岩石物理分析,推导出储层特征参数与各向异性参数之间的映射关系,开展针对致密砂岩储层的各向异性参数弹性阻抗反演流程。基于提出的裂缝参数反演方法,分别进行模型和实际工区数据的反演方法测试。结果表明,该方法具有良好的抗噪性,反演结果与测井值吻合较好,估算的各向异性参数能够较好地反映裂缝储层位置,能够实现致密砂岩储层裂缝特征的有效描述。The tight sandstone reservoirs in Xujiahe Formation in Sichuan are rich in oil and gas, but highly heterogeneous. The tight sandstone fractured reservoirs of Xujiahe Formation in Western Sichuan Depression are characterized by heterogeneity.Combining with the actual situation and based on rock physics analysis, the relationship between reservoir characteristic parameters and anisotropy parameters is deduced, and the anisotropic elastic impedance inversion workflow of tight sandstone reservoirs is carried out. Based on the proposed fracture parameter inversion method, the model and the actual work field data are tested, respectively. The results show that the proposed approach has great robustness, the inversion results are in good agreement with the well-log, and the estimated anisotropy parameters can accurately show the location of fractured reservoirs and achieve effective description of the fracture characteristics of tight sandstone reservoirs.

关 键 词：致密砂岩 储层裂缝 各向异性 弹性阻抗反演 

分 类 号：TE19[石油与天然气工程—油气勘探]