利用化探精查技术检测二氧化碳气藏

化探精查技术检测二氧化碳气藏异常方法是基于油气渗透理论,通过对CO₂(土壤或水中)和土壤全烃、碳酸钙、汞、同位素、荧光等地表地球化学指标组合异常的分析,结合地质—地球物理资料,预测CO₂气藏分布。笔者通过对济阳坳陷花沟地区化探方法、化探资料和气藏分布的综合分析,在区域地球化学背景分析研究基础上,指出区带异常,并结合油气地质、地球物理资料,对圈定的化探异常区进行分级评价,预测CO₂气藏聚集的有利区带,探索化探精查预测技术检测CO₂气藏的方法。

THE APPLICATION OF GEOCHEMICAL PRECISE SURVEY TECHNIQUE TO DETECTING CARBON DIOXIDE ACCUMULATIONS

The application of geochemical precise survey technique to detecting carbon dioxide anomalies is based on the theory of oil and gas infiltration.Using such geochemical comprehensive indices as CO 2 in soil,CO 2 in water,CO 2 alteration,soil total hydrocarbon, mercury,isotopes and fluorescence in combination with geological-geochemical data,we can predict the distribution of CO 2 gas accumulation.Based on an integrated analysis of geochemical data and distribution of gas accumulation in Haugou area of Jiyang depression and a study of regional geochemical background,the authors indicate the regional and zonal anomalies.Taking into account the oil and gas geological and geophysical data,this paper has also made grading evaluation of delineated geochemical anomaly areas,predicted zones favorable for CO 2 accumulation,and probed into the effective application of integrated geochemical precise survey technique to detecting carbon dioxide accumulations.