THE APPLICATION OF GEOCHEMICAL PRECISE SURVEY TECHNIQUE TO DETECTING CARBON DIOXIDE ACCUMULATIONS
GUO Dong1,2, LI Hong-mei2, CHENG Jun3, LIU Wei3
1. Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China;
2. Shengli Oilfield Corporation Ltd.,SINOPEC,Dongying 257022,China;
3. Huixin Company Ltd.,China University of Geosciences,Beijing 100083,China
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 CO2 in soil,CO2 in water,CO2 alteration,soil total hydrocarbon, mercury,isotopes and fluorescence in combination with geological-geochemical data,we can predict the distribution of CO2 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 CO2 accumulation,and probed into the effective application of integrated geochemical precise survey technique to detecting carbon dioxide accumulations.