中文摘要：

为了找出准噶尔盆地中部深层隐蔽油气藏的成藏机理与富集规律，通过车-莫古隆起形成演化及其不整合的控藏效应、油气充注历史和储层演化的配置关系、超压发育机制与隐性通道的输导效应三方面进行综合分析，结果表明：K／J不整合古土壤层发育连续，渗透率小于0．1md，垂向封盖能力强、半风化岩层CIA指数小于75％，化学风化作用弱，侧向非均质性强；油气充注时刻储层物性较好，孔隙度为10％～15％；4500-5500m以下发育静态超压，最高压力系数达2．2，大量发育天然水力破裂．永进地区深层隐蔽油气藏同时受油气充注时间、优势榆导通道、圈闲空间类型等成藏因素的控制.

英文摘要：

For studying the accumulation mechanism and enrichment rule in deeply-buried subtle oil/gas reservoirs in the hinterland of Junggar basin, the evolution and effects on oil accumulation of Che-mo palaeohigh and its related K/J unconformity, the relationship between charging histories and reservoirs evolution, the mechanism of overpressure development and subtle conduit pathway were amply discussed for Yongjin oilfield. The results show that the paleo-weathered soil layer of K/J unconformity develops widely and takes on favorable vertical sealing property （vertical permeability is less than 0. 1 md）, the semi-weathered layer experiences mainly physical weathering （CIA index is less than 75 %） and has strong lateral heteroge- neity; the reservoirs take on high porosity （from 10% to 15%） as hydrocarbon charging; and the strong static overpressure and natural hydraulic fractures develop widely under 4 500- 5 500 m （the maximal pressure coefficient is close to 2.2）. The main controlling factors of hydrocarbon accumulation include charging time, main conduit pathway and trapping space type.