东部凹陷荣兴屯构造特征及油气远景

为了揭示荣兴屯构造带各局部构造的构造特征并优选出有利区带,通过构造平面图、剖面图以及平衡剖面图,对荣兴屯构造带的基本构造格局、次级构造单元、构造层划分、构造样式以及圈闭类型等进行了深入研究,阐明了其总体具有东西倾向分带、南北走向分段和垂向构造分层的变形特点,东西分为5个构造单元,上下分为4个构造层,中—南段较北段构造样式更为复杂,圈闭类型主要是断块、断鼻等构造型圈闭,各局部构造与不同构造层油气富集程度差别大。结合烃源发育与已探明油气藏分布特点,指出烃源岩、构造格局和断裂体系是控制油气成藏的主要因素,综合分析认为荣兴屯斜坡带是进一步勘探的有利区带,并对其油气成藏条件进行了扼要分析。

The Structural Characteristics and Hydrocarbon Prospects in Rongxingtun Area of East Sag, Liaohe Depression

There are 5 sets of hydrocarbon-bearing formation exist in the Rongxingtun structural belt, while it is not clear for the oil and gas distribution and becomes the important restriction factor of its deepening exploration. Structural characteristics analysis can unravel the properties of different local structure and internal structure and its control effect on reservoir formation, so that it will be helpful to increase the understanding of its hydrocarbon capability. By using the structural planar maps, sections and balanced section, which will enable to conduct the research on the basic structural pattern, secondary structural units, the different structural formation, structural styles and trap types, illustrates that its overall has a tendency of structural deformation with sub-zone from west to east, sub-section from south to north and sub-formation in its vertical formation, specifically, it can be divided into 5 structural units, 4 structural formations, the structural styles of middle to southern sections are more complex than the northern section, the trap types are mainly structural maps, such as the faulted-block and faulted-nose, and furthermore the hydrocarbon-bearing between different local structures and structural formation are quite difference. Combining with the sources growth and the proven reservoir distribution, and points out that the faults system, the hydrocarbon source rocks and structural pattern are the main factor to control hydrocarbon accumulation, comprehensive analysis to work out the Rongxingtun slope zone is the favorable zones for the further exploration, and its hydrocarbon accumulation conditions are briefly analyzed too.