源外地区油气成藏特征、主控因素及地质评价——以准噶尔盆地西缘车排子凸起春光油田为例  

Reservoir-forming Characters,Key Control Factors and Geological Evaluation in the Area outside Oil Source——Take the Chunguang Oilfield in Chepaizi Uplift in Western Junggar Basin as an Example

作　　者：沈扬[1,2] 贾东[1] 宋国奇[3] 丁咸宝[2] 李茂榕[2] 

机构地区：[1]南京大学地球科学系,南京210093 [2]中国石化胜利油田分公司地质科学研究院,山东东营257015 [3]中国石化胜利油田分公司,山东东营257015

出　　处：《地质论评》2010年第1期51-59,共9页Geological Review

基　　金：中国石化股份有限公司科技攻关项目(编号P03011)资助成果

摘　　要：在油气近源富集的大背景下,仍有部分油气在远离烃源区被发现。对于这部分油气藏如何进行合理的解释?其与烃源区内油气成藏条件和主控因素有何不同?本文根据油藏(圈闭)—烃源的空间配置和成藏联系,将其分为源内、源边和源外三种类型。与源内相比,源外有其独特的地质条件和成藏机制。源外成藏虽较源内苛刻,但在一定的条件仍然可以局部富集形成大油气田。以准噶尔盆地西缘车排子凸起春光油田为实例进行典型解剖,提出生烃凹陷丰富的烃源、高效的输导体系和良好的时空配置关系是其得以源外成藏的主要控制因素。源外地区作为一个新的勘探领域,具备很大的拓展潜力和空间。在油气勘探中,应注意源外成藏的可能性,并采取针对性的以输导条件为核心的研究思路开展源外地区的油气勘探评价。In the most of cases,oil concentrated in the area near oil source,but a part of oil was discovered in the area far away from oil source.How to interpret these reservoirs？What＇s the difference between these two kind reservoirs in forming characters and key control factors？ According to the space collocation and the forming relationship between reservoir （trap） and oil source,the paper classify three different reservoirs distribution types,they are within oil source ,in the side of the oil source and outside oil source . Compared to the area within oil source,the area outside oil source had its unique geological conditions and reservoir-forming mechanism. Although the reservoir-forming condition in area outside oil source was more harshly than in area within oil source,but the area outside oil source could be forming hydrocarbon accumulation in special conditions. The paper researched the geological condition and reservoir-forming mechanism in area outside oil source by taking the Chunguang Oilfield of Chepaizi Uplift in west Junggar Basin as an example. It discovered that the key element of reservoir-forming outside oil source is abundant oil source sag,favorable cross migration system and profitable matching conditions. As a new prospect territory,the area outside oil source has well prospect potential and space. In the oil and gas exploration,we should pay attention to the possibility of reservoir-forming in area outside oil source,and evaluate potential exploration capacity by taking migration conduction as the key research thought.

关 键 词：源外 源内 成藏机理 输导体系 车排子 准噶尔盆地 

分 类 号：P618.13[天文地球—矿床学]