北大港浅层气识别技术研究与应用

本文主要以北大港浅层气研究项目为基础，应用测井处理、解释方法，选取了对气层最敏感、特征最突出的测井曲线，研究表明中子伽马、密度、声波等测井曲线反映气层特征明显，采用声波时差-中子伽马曲线重叠法、补偿中子-补偿密度曲线重叠法、测井曲线对比法等方法开展单井浅层气气层识别，摸清单井纵向含气分布情况。在横向上利用地震资料提取样板，预测浅层气的分布，研究过程中在港东开发区主要应用了能量吸收分析技术，开展了地震信息储层含气性预测与气层识别，尤其在Bq1井地区极浅层开展了气层预测，效果比较理想；在港西开发区利用地震AVO油气检测技术在G189井明化镇组进行了浅层天然气预测，取得了较好的实验性效果。

Recognition and Application of Shallow Natural Gas in Beidagang Zone

This paper chooses the most sensitive and prominent characteristics of the logging curves according to the methods of logging processing and interpretation, which bases on the project of the shallow gas in Beidagang. The research shows that the features of neutron gamma, density and acoustic logging curves are apparent. We adopt overlay technique of DTL and NGL, CNL and CDL, well-logging curve contrast method to recognition shallow natural gas and finding out containing gas of longitudinal distribution in single-well. We extract models by using seismic data from cross line and predict the distribution of shallow gas. The energy absorption analysis technology is applied in Gangdong development zones in the process of research. Especially the prediction of gas-bearing zone and gas identification is applied with perfect result in Gq1 well. AVO hydrocarbon detection technology is used in Minghuazhen Formation of G189 well in Gangxi development zones, and it achieves good experimental results.