AVO分析技术在KNW区块煤层含气性预测中的应用  

Application of AVO Analysis Technique on Predicting Gas Content of Coalbed in KNW Area

作　　者：陈思路 韩刚 李正义 Chen Silu;Han Gang;Li Zhengyi(CNOOC Research Institute Co.Ltd.,Beijing 100028,China)

机构地区：[1]中海油研究总院有限责任公司,北京100028

出　　处：《云南化工》2021年第11期133-138,共6页Yunnan Chemical Technology

摘　　要：以KNW区为例,通过岩石物理分析发现,模量属性和密度对煤层气敏感,含气量越高,模量属性和密度值越低,且含气量与模量属性负相关关系更加明显。AVO正演模拟分析表明,KNW区8+9号煤层表现为第Ⅳ类AVO异常特征,具体为含气量高异常较强,含气量低异常较弱。分析认为,AVO属性截距和梯度属性(A-B)可以预测KNW区8+9号煤层的含气性,应用效果良好。Take KNW area as an example,modulus attributes and density of the coalbed are sensitive to coalbed gas through petro-physical analysis.That means the higher the gas content,the lower the modulus attributes and density values,moreover,the negative correlation between gas content and modulus attributes is more obvious.Through AVO forward modeling analysis,8+9#coalbed in KNW area shows the typeⅣof AVO abnormal characteristics,and high gas content corresponds to strong abnormal,low gas content corresponds to weak abnormal.AVO attribute of"A-B"can predict the gas content of 8+9 coalbed in KNW area,which shows good application effect.

关 键 词：煤层气 AVO技术 岩石物理分析 AVO正演 

分 类 号：TE122[石油与天然气工程—油气勘探]