海拉尔呼和湖凹陷和10井天然气成因类型评价

Evaluation on Natural Gas Genetic Types of He10 Well in Huhehu Depression of Hailar

近年来的呼和湖凹陷投入了大量的勘探工作,先后完成11口探井,均未获得重大突破,2009年位于凹陷中部的和10井试油获得工业油气流,表明了呼和湖凹陷具有良好的油气资源潜力,尤其是天然气资源潜力更为可观。但由于研究区地质结构十分复杂,且存在多套煤系地层,多套烃源岩及生储盖组合,油和气的源岩还不确定。通过和10井天然气的地化特征及碳同位素及同位素示踪气-源对比,认为本区天然气为湿气,介于油型气和煤型气之间,偏向油型气,为混合气。

In recent years, a lot of prospecting work in Huerhu depression was carried out, 11 exploratory wells were finished, but no one gained major breakthrough. The oil testing of He10 well located in central depression acquired industrial oil and gas flow in 2009,which indicated that Huerhu depression has good oil and gas resource potential, especially the gas resources potential is even more considerable. But as the geological structure of the research area is very complicated, and it exists many coal measure strata and many source rock and source-reservoir-cap combination, and the source rock of oil and gas is not sure yet. Through comparison of geochemical features and the carbon isotope and the isotopic tracing gas source of He10 well gas, it’s concluded that the gas of the area is the wet gas that is between oil type gas and coal type gas and is biased toward oil type gas and is the gas mixture.