基于地震属性优选技术的煤层气开发单元划分

Division of development units of coalbed methane based on seismic attributes optimization technology

为了进一步提高煤层气井开发效果,提取了目标煤层的多种地震属性,同时建立了已开发井产量分布样本;在此基础上,通过对所有地震属性与产量样本拟合分析,利用指标权重法计算,相干和均方根振幅2种地震属性对产量影响的累积贡献率达到85%以上,因此优选了相干和均方根振幅2种地震属性;通过2种属性与产量的拟合相关系数,建立了综合属性预测公式,划分了有利开发单元,使得预测结果与已开发井产量的相关性得到加强。结果表明:通过开发井资料与地震属性优选技术,可准确的划分开发单元。

In order to further improve the development effect of coalbed methane wells,a variety of seismic attributes of the target coal seam are extracted,and production distribution samples of developed wells are established.On this basis,through the fitting analysis of all seismic attributes and yield samples,the index weight method is used to calculate that the cumulative contribution rate of coherence and root mean square amplitude to yield is more than 85%,so the two seismic attributes of coherence and root mean square amplitude are selected.Finally,through the fitting correlation coefficient between the two attributes and the yield,the comprehensive attribute prediction formula was established,and the favorable development units were divided.The correlation between forecast results and developed well production is enhanced.The results show that development units can be accurately divided through well data and seismic attribute optimization technology.