In this paper , the process of hydrocarbon generation and evolution in the four thermal evolutionary stages ( low - mature , mature , high - mature , overmature ) of geohistory is simulated by selecting low - mature hydrocarbon source rocks and using the method in which hydrocarbons are generated from artificial pyrolysis and petroleum migration is controlled properly 本文選用低成熟烴源巖,采取人工熱解生成油氣及適當(dāng)控制石油運移的方法,模擬了4個地史熱演化階段(低熟、成熟、高熟、過熟)中油氣的生成演化過程。
The paper adopts some methods such as gas composition , carbon isotope , systematical analyzing and testing of reservoir bitumen biomarker from high evolutional natural gas and quantitative calculation of mixed gas , illustrates that natural gas from the section of jialingjiang formation is mainly attributed to sapropel type organic matter gas of permian , comes from carbonatite hydrocarbon rocks permian which most of them are overmature , its main gas source has nothing to do with carbonatite hydrocarbon rocks of jialingjiang formation themselves , presents in geochemistry characteristics of oil type cracked gas 摘要通過對川中川南過渡帶西部的磨溪潼南地區(qū)嘉二段天然氣組成、碳同位素組成、高演化天然氣儲層瀝青生物標志化合物的系統(tǒng)分析測試和混合成因氣的定量估算,闡明了該區(qū)嘉二段天然氣主要屬于二疊系腐泥型有機質(zhì)成因氣,來源于二疊系過成熟為主的碳酸鹽巖烴源,主力氣源與嘉陵江組自身的碳酸鹽巖烴源無關(guān),并具有油型裂解氣的地球化學(xué)特征。
The generation of hydrocarbons can be divided into four stages with continuous evolution , from unmature to overmature stages , and the migration into three concentrated stages ; that is , the geological process of geologic body during which hydrocarbons generate and migrate simultaneously is simulated as multistage generation and concentrated migration , thus , the possible distribution of hydrocarbons in reservoirs in different evolutionary stages and under different migration efficiency can be obtained 從未熟到過成熟階段將油氣的生成分成4個連續(xù)演化階段,運移分成3個集中階段,即用多階段生成、集中運移模擬地質(zhì)體中油氣邊生邊運的地質(zhì)過程,得到了不同演化階段不同運移效率下儲層中可能的油氣分布。