库车坳陷油气有序聚集规律及其勘探意义

Petroleum“Orderly Accumulation”Regularity and Exploration Significance in Kuqa Depression,Tarim Basin

多种油气藏类型伴生共存的现象在许多盆地中都较为常见,然而目前的研究仅仅是对单一的油气藏类型开展其赋存规律的研究。分析了塔里木盆地库车坳陷各种油气藏的分布特点,认为库车坳陷油气藏在区域上和空间上都存在着油气有序聚集的特征。这种有序聚集规律主要表现为:不同油气藏烃类组份特征分布规律的有序性、成藏动力空间分布的有序连续性和保存机制的有序性,从而形成了库车坳陷不同类型油气藏在空间上共生伴存的特征。这一认识上的突破,对于深化库车坳陷油气勘探具有重要意义。

The phenomena of associated coexistence of a variety of oil-gas reservoir types are more common in many basins.However,thecurrent studies are only for a single type of reservoir in terms of petroleum existence or enrichment regularity.Taking Kuqa depression ofTarim basin as an example,the regional spatial distribution characteristics and rules of various reservoirs in this area were analyzed,andthought that the reservoirs in Kuqa depression have the rule and characteristics of petroleum＂orderly accumulation＂in regional and spatialdomains.The orderly accumulation rule is mainly shown in three aspects：1） the order of the distribution of hydrocarbon components in dif-ferent reservoirs; 2）the continuity of spatial distribution order of reservoir-forming dynamics,and 3） the order of the reservoir preservationmechanisms,all of which formed the associated coexistence of different types of reservoirs in space in Kuqa depression.This breakthroughof recognition is of great significance for further petroleum exploration in Kuqa depression.