桥口、白庙地区天然气地球化学特征及气源追踪

目的 为指导油气勘探,对桥口、白庙地区油气的地球化学特征及气源追踪进行了研究。方法 通过对天然气成分、稳定碳同位素、稀有气体同位素等地化特征的对比研究,准确分析油气的来源地区和层位。结果 桥口地区油气主要来源于前梨园洼陷下第三系烃源岩,天然气为油型气;白庙地区油气成因比较复杂,有来源于前梨园洼陷、葛岗集洼陷的下第三系烃源岩和深部石炭-二叠纪煤系地层烃源岩,其构造翼部为油型气,构造腰部为混合气,构造高部为煤型气。结论 为气源分析提供了一种新方法,对天然气勘探有重要意义。

The geochemical characteristics of natural gas and gas-sources tracing in Qiaokou-Baimiao region

AimTo direct oil-gas exploring,the study of Qiaokou-Baimiao area reservior from geochemistry character and tracing of gas resource is done.MethodsAnalyzing the region and stratum by comparing with the geochemical characteristics of the component of gas, stable carbon isotopes, and rare gas isotopes etc.ResultsThe oil and gas in Qiaokou area come from E source rocks in Qianliyuan Depression as oil-associated gas. Things are more complicated in Baimiao area where oil and gas come from Qianliyuan area,E source rocks and deep C-P source rocks of Gegangji area. The ala of Baimiao structure is oil-associated gas. The middle is mixture gas. The higher part is gas-bearing formations.ConclusionIt provides a new method to trace the sources of nature gas.