A COMPREHENSIVE METHOD OF MULTIPLE INFORMATION FOR TRACING GAS SOURCE—A CASE STUDY OF JIYANG DEPRESSION

Multiple information,such as carbon isotope,argon isotope,light hydrocarbon composition and other geological data,from 5 deep wells(4000m)of 3 areas in Jiyang depression was used to correlate natural gas with absorbed gas in source rocks directly and to correlate natural gas with associated gas in oil accumulation indirectly.The natural gas was traced effectively.The accumulation patterns of gas were proposed.