川中须家河组致密砂岩储层含气性预测  

The Seismic Prediction of Gas Bearing for Tight Sandstone Reservoirs of Xujiahe Formation in the Middle of Sichuan Basin

作　　者：包世海[1] 李新豫[1] 欧阳永林[1] 曾庆才[1] 陈胜[1] 王兴[1] 张连群[1] 

机构地区：[1]中国石油勘探开发研究院廊坊分院,廊坊065007

出　　处：《科学技术与工程》2016年第17期36-40,共5页Science Technology and Engineering

基　　金：国家科技重大专项课题(2011ZX05013)资助

摘　　要：川中须家河组气藏为典型的大面积、低丰度、致密岩性气藏类型,资源潜力巨大,是四川盆地增产上储重要层系;但该类气藏储层薄、非均质性强、气水关系非常复杂,如何提高含气富集区(甜点)预测精度和建立气水识别方法是须家河组气藏勘探开发最关键的问题。从储层岩石物理分析和模型正演等基础研究入手,深入分析不同岩性组合下气层和水层的振幅随偏移距变化(amplitade variation with offset,AVO)响应特征,建立了一套以AVO叠前道集、近远道叠加剖面对比分析为基础,AVO主振幅主频率技术为核心的须家河组致密气藏检测及气水层识别新思路和新方法,生产应用效果显著。The gas reservoir of Xujiahe formation in the middle of Sichuan Basin is a typical large area,low abundance,tight sand gas reservoir,it has great potential. It is an important layer for reserves increase in Sichuan Basin,but this kind of gas reservoir is very complex： thin reservoirs,strong heterogeneity,the distribution of gas and water is very complicated,so how to improve the prediction accuracy of gas enrichment zone and establish the identification method of gas and water are the key problems for exploration and development of gas reservoirs in Xujiahe group. Based on the analysis of reservoir rock physics and forward modeling and summarize of the AVO response characteristics of gas and water layer,it establishes a new method to indentify the gas and water layer for tight sand reservoir of Xujiahe formation,using the basic method of AVO pre stack analysis,near stack section and far stack section comparative analysis and the key method of Main amplitude and Main frequency technique. The methods obtain well production effect.

关 键 词：致密砂岩 气藏预测 气水识别 振幅随偏移距变化(amplitade variation with offset AVO) 主振幅主频率 

分 类 号：TE122.113[石油与天然气工程—油气勘探]