车镇凹陷车西洼陷流体封存箱与油气分布  

Fluid compartment and oil-gas distribution in Chexi depression Chezhen sag

作　　者：孙杰 

机构地区：[1]中石化胜利石油工程有限公司地质录井公司

出　　处：《录井工程》2014年第3期82-86,104,共5页Mud Logging Engineering

摘　　要：从车镇凹陷车西洼陷烃源岩、油气运移、构造及储集层等方面研究了油气成藏规律,应用封存箱理论探讨了构造、烃源岩、沉降中心与油气富集的关系。古近系存在两个油气封存箱,上封存箱油气主要分布在箱底,油气受放射状及环带状构造带控制,形成了现今点、线、面多种油气分布格局,下封存箱油气主要分布在箱顶,受储集层分布控制。洼陷中部砂体、北部近洼砾岩体及盆边下古生界潜山为主要含油气层位,该层位优质储集层富集高产。由于地质构造原因,该凹陷沉积中心不一致,位于沉积中心附近的构造带油气富集。可根据封存箱原理、环带状与放射状构造的发育及相交关系、沉降中心与生油中心的位置关系、烃源层有机质丰度及储集层分布规律,寻找油气富集区。The author studied oil-gas pool forming law from the aspects of hydrocarbon source rock,oil and gas migration,structure and reservoirs in Chexi depression of Chezhen sag,and discussed the relationship between structure,hydrocarbon source rock,subsiding center and oil-gas enrichment with compartment theory.The Paleogene has two oil-gas compartments,oil and gas of the upper compartment mainly distributed at the bottom of the compartment,oil and gas are dominated by radial and ring banded structure,multiple oil and gas distribution pattern were formed in modern point,line and surface,while the oil and gas of the lower mainly distribute on the top of the compartment and are controlled by reservoir distribution.The sandbody at the depression centre,the conglomerate near the northern edge of the depression and lower Paleozoic buried hill at the edge of the basin are the main oil and gas bearing horizons,the horizons are high quality,reservoirs enrich and high yield.Due to the reason of tectonic structure,the sedimentary centers of the sag are inconsistent,the structural belts near the depocenter are oil-gas enrichment.According to the compartment principle,development and intersection relation of ring banded structure and radial structure,the position relationship between depocenter and oil generating center,organic matter abundance in hydrocarbon source layer and reservoir distribution law,the oil and gas enrichment area can be found.

关 键 词：车西洼陷 封存箱 构造带 生油中心 储集层 油气分布 

分 类 号：TE142[石油与天然气工程—油气勘探]