塔里木盆地寒武系盐下领域勘探关键问题与攻关方向  

Key factors and directions of exploration in the Cambrian pre-salt sequence,Tarim Basin

作　　者：吕海涛[1,2] 耿锋[1,2,3] 尚凯 Lyu Haitao;Geng Feng;Shang Kai(Key Laboratory of Deep Geology and Resources,SINOPEC,Beijing 102206,China;Northwest Branch Company,SINOPEC,Urumqi,Xinjiang 830011,China;College of Geoscience and Surveying Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)

机构地区：[1]中国石化深部地质与资源重点实验室,北京102206 [2]中国石化西北油田分公司,新疆乌鲁木齐830011 [3]中国矿业大学(北京)地球科学与测绘工程学院,北京100083

出　　处：《石油与天然气地质》2022年第5期1049-1058,共10页Oil & Gas Geology

基　　金：中国石化科技部项目(P21048-1);中国石化西北油田分公司项目(KJ202009)。

摘　　要：寒武系盐下是塔里木盆地目前勘探潜力最大的战略接替领域,但是多年来一直未获得实质性突破,该领域仍然存在一些关键问题需要继续攻关解决。通过总结回顾塔里木盆地寒武系重点探井取得的成果,研究了寒武系盐下领域成藏条件,指出了有利勘探区带和下步工作方向。研究认为,塔里木盆地寒武系盐下领域具备良好烃源岩、储层和盖层等基本成藏地质条件,但在不同区带,成藏要素配置存在差异。综合来看,寒武系盐下领域存在“原地烃源岩、垂向运聚成藏”和“异地烃源岩、侧向运聚成藏”两种成藏模式。指出了面向满加尔方向的塔中隆起区、面向麦盖提斜坡区的色力布亚-海米罗斯-玛扎塔格构造带和塔北隆起阿克库勒凸起是下步勘探的重点区带,并逐一提出重点研究攻关方向。The Cambrian pre-salt sequence has been an important strategic successor play for oil and gas exploration with the greatest exploration potential in the Tarim Basin.However,no significant discoveries have been made for the past many years,with some key problems yet to be solved.Based on the summary and review of the achievements of key exploration wells in the Cambrian in the Tarim Basin,the conditions of hydrocarbon accumulation in the Cambrian presalt sequence are recognized,while pointing out the play fairways for exploration and the directions for research in the near future.The study shows that the Cambrian pre-salt sequence in the Tarim Basin is of better geological conditions for hydrocarbon accumulation such as source rocks,reservoirs and cap rocks,but there are differences in the configuration of play elements in different zones.Generally speaking,there are two hydrocarbon accumulation patterns in the pre-salt sequence,namely the“accumulation via vertical migration of hydrocarbons from indigenous source rocks”and the“accumulation via lateral migration of hydrocarbons from allochthonous source rocks”.It is pointed out that the Tazhong Uplift facing Manjiaer Sag,the Selibuya-Haimiluosi-Mazhatage structural belt facing Maigaiti Slope and the Akekule Salient of Tabei Uplift are the key areas for further exploration,and the key research directions are put forward respectively.

关 键 词：成藏模式 油气勘探 盐下 寒武系 塔里木盆地 

分 类 号：TE132.1[石油与天然气工程—油气勘探]