基于压缩感知的波形指示反演在薄储层预测中的应用  

Application of waveform indication inversion based on compressive sensing in thin reservoir prediction

作　　者：任广磊[1] 李晓慧[1] 王照周 冉辉 刘新宇 梁国胜 陈郭平 REN Guanglei;LI Xiaohui;WANG Zhaozhou;RAN Hui;LIU Xinyu;LIANG Guosheng;CHEN Guoping(Research Institute of Exploration and Development,North China Oil and Gas Company,SINOPEC,Zhengzhou 450006,China;Anton Petroleum Technology(Group)Co.,Ltd.,Beijing 100102,China)

机构地区：[1]中国石化华北油气分公司勘探开发研究院,河南郑州450006 [2]安东石油技术(集团)有限公司,北京100102

出　　处：《断块油气田》2024年第4期637-644,共8页Fault-Block Oil & Gas Field

基　　金：中国石油化工股份有限公司科技项目“大牛地上古生界致密砂岩气藏高效调整关键技术”(P23031)。

摘　　要：鄂尔多斯盆地东缘大牛地气田二叠系下石盒子组有效砂体致密、规模小、厚度薄,储层非均质性强且地震波阻抗叠置严重。为实现下石盒子组5~6 m致密薄砂岩储层的有效刻画,文中选取了盒1段气藏主力单砂体作为研究对象。在地震正演分析基础上,形成了叠前道集优化提质+压缩感知拓频+纵波标定+波形指示GR反演的技术组合,该技术组合将压缩感知技术与波形指示反演技术的优势有机结合起来,并在盒1段气藏主力单砂体进行了应用。预测结果表明:地震剖面横、纵向分辨率显著提高,其预测成果更加符合地质沉积规律,与实钻井吻合良好,实现了5~6 m致密薄砂岩的有效刻画。该研究为致密砂岩气藏薄储层预测提供了一种新方法。The effective sand body of Lower Shihezi Formation of Permian in Daniudi gas field in the eastern margin of Ordos Basin is tight,small in scale,thin in thickness,has strong reservoir heterogeneity and is severely overlapped in seismic wave impedance.In order to effectively describe the tight thin sandstone reservoir of Lower Shihezi Formation with 5-6 m,the main single sand body of He1 Member gas reservoir is selected as the research object.On the basis of seismic forward analysis,a technical combination of pre-stack gather data optimization and quality improvement+compressive sensing extension frequency+P-wave calibration+waveform indication GR inversion is formed.This technology combination organically combines the advantages of compressive sensing technology and waveform indication inversion technology,and is applied in the main single sand body of He1 Member gas reservoir.The prediction results show that the transverse and longitudinal resolution of the seismic profile is improved significantly,and the prediction results are more consistent with the geological sedimentary law,and are in good agreement with the real drilling,and the effective characterization of the 5-6 m tight thin sandstone is realized.This study provides a new method for thin reservoir prediction of tight sand gas reservoirs.

关 键 词：道集优化 压缩感知 纵波标定 波形指示反演 致密薄储层预测 

分 类 号：TE132.14[石油与天然气工程—油气勘探]