鄯勒-勒东地区构造特征与油气聚集

STRUCTURAL CHARACTERISTICS AND TECTONIC EVOLUTION IN SHANLE-LEDONG AREA

古构造和现今构造是鄯勒地区油气成藏的主控因素,对鄯勒-勒东地区构造特征及构造演化分析有利于该区油气深入勘探.在断层分级基础上,描述了断层的剖面和平面特征,分析了断层与构造、沉积的关系.讨论了印支、燕山、喜山运动形式及对该区构造的影响.在NS向上将鄯勒-勒东构造分为冲断带、断褶带、南部斜坡3个带.断褶带是油气富集主要部位,斜坡带紧邻生油洼陷,也具备较好的成藏能力,如勒东断鼻.在构造演化分析基础上,指出勒12块圈闭在鄯善群沉积之前已形成,是油气运聚有利指向区.

Ancient and modern structure were the major hydrocarbon accumulation controls in Shanle region＇s. Analysising the structure characteristics and the tectonic evolution in ShanLe-Ledong area is favor of the region＇s oil and gas exploration in-depth. On the basis of the fault levels, the paper has descripted the fault＇s characteristics in profile and flat, and has analysised the relations between fault and structural and deposition, and has discussed the forms of Indo-China, Yanshan, the Himalayan movement and the impacts of structural. The Shanle-ledong structural has been divisioned in the thrust Belt, the fault-fold belt, the southern slope in the north-south direction, and the fault-fold belt is oil enrichment place, and the southern slope is good at accumulation because it is next to the oil sag. On the basis of the structural evolution, the author point out Le12 block is the Oil and gas migration point to the positive zone because it has formed before the Shanshan Group deposition.