三塘湖盆地马朗凹陷二叠系油气成藏期探讨

THE STUDY OF THE PERMIAN RESERVOIR GENERATION PERIOD IN MALANG SAG SANTANGHU BASIN

本文在原油地球化学特征研究的基础上,对芦草沟组烃源岩生烃物质基础—有机质显微组分进行研究,认为芦草沟组烃源岩主要生烃组分为腐泥无定形体,以油气成藏期基本概念为依据,沿着油气生成—运移—聚集这一主线对油气成藏过程进行分析,从而确定出三塘湖盆地马朗凹陷二叠系油气成藏关键时期为晚燕山期,对重塑油气动态成藏过程和油气勘探具有重要的意义,特别是对于二叠系裂缝性储层裂缝含油性、有效性研究具重要的参考价值,必将有助于下一步油气勘探工作。

It is inferred that the main source composition in the Lucaogou group source rock was sapropelic amorphous matter through the study of the source oil generating material base the organic matter microcomponent, in Lucaogou group on the basis of the study on crude oil geochemical features. The oil and gas reservoir generation process was analyzed along the main clue of oil and gas generation-migration-accumulation on the foundation of reservoir generation concept, and thus the critical reservoir generation stage was determined to be the late Yanshanian period for the Permian reservoirs in Malang sag Santanghu basin, which is very important in reappearing the dynamic process of reservoir generation and exploration, and is a important reference for the research of oil-bearing capacity and validity of the Permian fractured reservoir, and make contribution to the further exploration.