石油与天然气地质 ›› 2017, Vol. 38 ›› Issue (2): 292-301.doi: 10.11743/ogg20170209

• 油气地质 • 上一篇    下一篇

塔中地区北坡志留系晚期油气充注证据及控制因素

吴悠1, 陈红汉3, 赵玉涛4, 唐大卿3, 云露5, 漆立新5   

  1. 1. 长江大学 地球科学学院, 湖北 武汉 432100;
    2. 长江大学 油气资源与勘探技术教育部重点实验室, 湖北 武汉 432100;
    3. 中国地质大学(武汉) 资源学院, 湖北 武汉 430074;
    4. 中国石油 吉林油田分公司 勘探开发研究院,吉林 松原 138001;
    5. 中国石化 西北油田分公司, 新疆 乌鲁木齐 830011
  • 收稿日期:2015-10-09 修回日期:2016-03-21 出版日期:2017-04-28 发布日期:2017-05-04
  • 第一作者简介:吴悠(1984-),女,讲师,含烃流体地质与油气成藏。E-mail:wuyou-33@163.com。
  • 基金项目:
    油气资源与勘探技术教育部重点实验室开放基金资助项目(K2016-12)。

Evidences and controlling factors of hydrocarbon charging in the Late Silurian in the north slope of the Tazhong Uplift,Tarim Basin

Wu You1, Chen Honghan3, Zhao Yutao4, Tang Daqing3, Yun Lu5, Qi Lixin5   

  1. 1. Faculty of Earth Science, Yangtze University, Wuhan, Hubei 432100, China;
    2. Key Laboratory of Exploration Technologies for Oil and Gas Resources, Ministry of Education, Yangtze University, Wuhan, Hubei 432100, China;
    3. Faculty of Earth Resources, China University of Geosciences, Wuhan, Hubei 430074, China;
    4. Research Institute of Exploration and Development, Jilin Oilfield Company, PetroChina, Songyuan, Jilin 138001, China;
    5. Northwest Oilfield Company, SINOPEC, Urumqi, Xinjiang 830011, China
  • Received:2015-10-09 Revised:2016-03-21 Online:2017-04-28 Published:2017-05-04

摘要: 塔中北斜坡志留系近几年在油气勘探上取得重大突破,但由于受多期构造运动影响,油气成藏过程复杂。通过对塔中北斜坡志留系23块样品的流体包裹体系统分析以及断裂活动特征研究,识别出研究区存在3期油充注和1期天然气充注,以海西晚期(318~245 Ma)寒武系-下奥陶统油充注和燕山期-喜马拉雅中晚期(124~25 Ma)寒武系-下奥陶统以及中-上奥陶统油气充注为主。研究区志留系在北东向张扭性走滑断裂的控制下,海西晚期虽然油充注活跃但油藏基本遭受破坏形成残留沥青,而燕山期-喜马拉雅中晚期的油气再充注决定了现今油气藏面貌。因此,塔中北斜坡应以寻找燕山期-喜马拉雅中晚期油气藏为主要勘探目标。

关键词: 流体包裹体, 走滑断裂, 油气充注, 志留系, 塔中隆起, 塔里木盆地

Abstract: In recent years,a breakthrough has been achieved in the exploration of the Silurian strata in the north slope of the Tazhong Uplift.However,it also reveals the complexity of the hydrocarbon accumulation process,owing to the multistage tectonic movement.In this paper,fluid inclusions analysis is performed on 23 samples of the Silurian strata in the north slope of the Tazhong Uplift,and also faulting activities characteristics were studied.The results indicate that there are four events of oil charging and one event of gas charging.The oil originated from the Cambrian to the Lower Ordovician source rock charged during the Late Hercynian (318-245 Ma),while oil and gas originated from the Cambrian-Lower Ordovician source rock and Middle-Upper Ordovician source rock charged during the Yanshanian to Middle-Late Himalayan (124-25 Ma).Due to the NE extensional strike-slip faulting,the early stage charged accumulations were destroyed and only residual bitumen remains,even though oil charging was active during the Late Hercynian.The oil and gas recharged during the Middle-Late Himalayan determined the hydrocarbon characteristics in the reservoirs.In all,the major targets for hydrocarbon exploration in the north slope of the Tazhong Uplift shall be accumulations formed during the Yanshanian to Middle-Late Hercynian.

Key words: fluid inclusion, strike-slip fault, hydrocarbon charging, Silurian, Tazhong Uplift, Tarim Basin

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