摘要
利用AVO技术进行常规含气层预测是一项成熟有效的技术,但在鄂东缘围绕煤层烃源岩上、下形成的致密气层预测中,存在效果不稳定、影响因素不明的问题。针对研究区煤系致密砂岩气藏纵向上发育的不同岩性组合,建立四大类七种岩性组合模型进行AVO正演,分析各种地质模型不同参数变化时AVO响应特征,通过AVO量板方式,直观表达出AVO响应变化规律,确定AVO技术的适用范围,为具有相似地质情况的其他地区开展AVO含气预测提供参考。
The amplitude variation with offset(AVO)technique is mature and efficient in predicting conventional gas-bearing reservoirs.However,it demonstrates unstable performance in the prediction of tight gas reservoirs above and below the source rock in coal seams in the eastern margin of the Erdos Basin,and the influencing factors are unknown.Hence,seven lithological combination models falling within four categories are constructed for AVO forward modeling considering the vertical lithological combinations of the coal-measure tight sandstone gas reservoirs in the study area.The AVO response with the variation of different parameters in all geological models is analyzed,and the variation laws of AVO response are intuitively displayed through template charts of AVO to further deduce the application scope of AVO.The research can provide a reference for the prediction of gas-bearing formations by AVO in other areas with similar geological conditions.
作者
刘红星
陈海清
陈斌
郭波
贺保卫
屈燕微
LIU Hongxing;CHEN Haiqing;CHEN Bin;GUO Bo;HE Baowei;QU Yanwei(Exploration and Development Department of China United Coalbed Methane Co.,Ltd.,Beijing 100015,China;Geological Research Center,GRI,BGP Inc.,CNPC,Zhuozhou,Hebei 072750,China)
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2022年第S02期92-99,228-229,共10页
Oil Geophysical Prospecting
基金
国家科技重大专项“非常规油气地震勘探关键技术与集成”(2017ZX05018-004-004)资助
关键词
鄂东缘
煤系地层
致密气
AVO
模型正演
eastern margin of Erdos Basin
coal measure formations
tight gas
AVO
forward modeling
作者简介
刘红星,高级工程师,1970年生,1992年获大庆石油学院勘查地球物理专业学士学位,现就职于中联煤层气有限责任公司,主要从事地震勘探采集、处理、解释方法研究;陈海清,河北省涿州市华阳东路物探科技园研究院地质研究中心,072750。Email:chenhaiqing@cnpc.con.cn
