The significance of oil and gas exploration indicated by carbon isotope logging data-Taking A1 well in Wenchang B depression as an example
Based on the introduction of carbon isotope logging technology,taking A1 well as an example,the analysis of carbon isotope logging data is carried out to reveal its role in oil and gas exploration.The analysis suggests that carbon isotope data can divide the sources of gas encountered during drilling.Natural gas encountered during drilling above 1500m in this well is mainly biogenic gas,while natural gas encountered during drilling below 1500m is thermogenic gas;Carbon isotope data can reveal the genetic characteristics of natural gas.The Enping Formation and below have obvious deep oil and gas migration characteristics,and natural gas is a crude oil associated gas of the same origin as the WC19-1 structure;Carbon isotope data can also analyze the sources of CO2.CO2 in this region is mainly inorganic and has a certain correlation with the existence of deep and large faults.
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