叠前地质统计学反演在北黄海X区块储层预测中的应用  

Application of pre-stack geo-statistical inversion in reservoir prediction of the Block X in the North Yellow Sea Basin

作　　者：简晓玲[1,2] 张园园 Jian Xiaoling;Zhang Yuanyuan(MLR Key Laboratory of Marine Mineral Resources,Guangzhou 510075,Guangdong,China;Guangzhou Marine Geological Survey,Guangzhou 510075,Guangdong,China)

机构地区：[1]国土资源部海底矿产资源重点实验室,广东广州510075 [2]广州海洋地质调查局,广东广州510075

出　　处：《地质学刊》2020年第1期163-169,共7页Journal of Geology

基　　金：国家海洋地质研究专项(GZH200700405);国家自然科学青年基金项目“北黄海盆地构造热机制与成烃效应”(41302100)。

摘　　要：北黄海X区块中生界目的层埋藏超过3000 m,储层横向连续性较差,纵向岩性变化快,砂体厚度较薄,精细刻画储层难度较大。为了丰富目标优选的地质信息,在叠前同时反演的基础上,采用将区域地质信息、钻井资料和地震资料有机结合的叠前地质统计学反演方法,开展研究区储层预测工作,得到的反演结果与钻井资料吻合度较高,有效提高了储层预测精度。依据反演结果在研究区刻画了多套单砂体,并确定白垩系底部的一套砂体在区内分布稳定、厚度较大,可作为下一步勘探的主要目的层。采用叠前地质统计学方法能够实现对区内储层的精细刻画和描述,并为主要目的层的划定提供更加可靠的依据。Buried deeper than 3000 m with thin sand body,the Mesozoic reservoir in the Block X of the North Yellow Sea Basin is poor in horizontal continuity and fast in vertical lithological changes,which makes it difficult to precisely describe the reservoir.In order to enrich geological information for target optimization,based on the pre-stack simultaneous inversion,this paper used the pre-stack geostatistical inversion to predicate the reservoir by integrating regional geological information,well data and seismic data.The inversion results were highly consistent with drilling data,effectively improving the accuracy of reservoir predication.Accordingly,several sets of single sand bodies were depicted in the study area,and it was determined that the sand body at the bottom of the Cretaceous was stable and thick,which could be used as the main target layer for next exploration.Pre-stack geostatistics can be used to accurately characterize and describe the reservoirs in the study area,and provide a more reliable basis for determining the main target layer.

关 键 词：叠前地质统计学 反演 储层预测 中生界 北黄海盆地 

分 类 号：P631.4[天文地球—地质矿产勘探]