摘要
以辽河油田西部凹陷为例,对气藏与油藏分布特征异同点及其形成原因进行了探讨。研究表明:辽河盆地西部凹陷天然气和石油资源都很丰富,作为同一套源岩的烃产物,天然气和石油在分布特征上有着复杂而密切的联系。对比发现,西部凹陷内天然气藏的分布既表现出与油藏同生共存的共性特征,又表现出较之油藏在平面上显示更广、成藏更为集中,在剖面上集中在烃源岩及与其相邻层系且具有明显层次性的个性特征。结合实验研究成果分析认为,烃源岩生烃特征和油气运移能力差异是控制天然气藏和油藏分布特征异同点的最根本因素:烃源岩油气兼生的特点决定了凹陷内天然气与石油共生并存;天然气自身运移能力强于石油又决定了天然气较之石油分布更广泛,但更倾向于在邻近于烃源岩的地区和层系聚集成藏。
Taking the west depression of the Liaohe oil field as a case of study,this paper discusses on the similarities and differences of distribution between gas and oil pools and how they origin from.The discussion shows that there are abundant hydrocarbon resources in this area,and generated from the same source rocks oil and gas present complicated but close relationship in their distribution.The comparative analysis discovers that,in spite of being co-generated and co-existed with oil pools,gas pools are distributed in wider and more centralized areas than oil pools on the plane;while on the profile gas pools gather around the source rocks and the adjacent beds with obvious levels.Further studies combined with experiments show that the key points controlling gas distribution are source rock and characteristics of the gas migration itself.The paragenesis of oil and gas is determined by the source rock,which generates both oil and gas.Because of its active migration ability,gas distribution is wider than that of oil and it is more apt to accumulate near the source rock.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2008年第9期21-23,共3页
Natural Gas Industry
基金
国家自然科学基金资助项目"碎屑岩盆地天然气聚集主要机理类型及条件转换"(编号:40472073)的资助
关键词
辽河盆地
西部凹陷
油藏
气藏
分布特征
烃源岩
油气运移
Liaohe basin,west depression,oil reservoir,gas reservoir,distribution feature,hydrocarbon source rock,oil and gas migration
