石油学报 ›› 2017, Vol. 38 ›› Issue (4): 414-424.DOI: 10.7623/syxb201704005

• 地质勘探 • 上一篇    下一篇

准噶尔盆地莫索湾凸起古油藏的流体证据

麻伟娇1, 卫延召1, 曾德龙2, 吴涛2, 蔡郁文1, 李秀丽1,3   

  1. 1. 中国石油勘探开发研究院 北京 100083;
    2. 中国石油新疆油田公司勘探开发研究院 新疆克拉玛依 834000;
    3. 中国石油集团公司盆地构造与油气成藏重点实验室 北京 100083
  • 收稿日期:2016-09-19 修回日期:2017-01-18 出版日期:2017-04-25 发布日期:2017-05-04
  • 通讯作者: 卫延召,男,1972年2月生,1995年获兰州大学地质学专业学士学位,2001年获中国石油勘探开发研究院博士学位,现为中国石油勘探开发研究院高级工程师,主要从事石油、天然气地质综合研究。Email:weiyanzhao@petrochina.com.cn
  • 作者简介:麻伟娇,女,1991年2月生,2014年获中国地质大学(武汉)资源勘查工程专业学士学位,现为中国石油勘探开发研究院硕士研究生,主要从事油气成藏方向的研究。Email:maweijiao_cug@126.com
  • 基金资助:

    国家重大科技专项(2016ZX05046-001)及中国石油天然气股份有限公司油气勘探重大科技项目(2016B-0301)资助。

Fluid evidence of paleo-reservoir in the Mosuowan uplift, Junggar Basin

Ma Weijiao1, Wei Yanzhao1, Zeng Delong2, Wu Tao2, Cai Yuwen1, Li Xiuli1,3   

  1. 1. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China;
    2. Research Institute of Petroleum Exploration and Development, PetroChina Xinjiang Oilfield Company, Xinjiang Karamay 834000, China;
    3. CNPC Key Laboratory of Basin Structure and Hydrocarbon Accumulation, Beijing 100083, China
  • Received:2016-09-19 Revised:2017-01-18 Online:2017-04-25 Published:2017-05-04

摘要:

对准噶尔盆地腹部地区古油藏分布及次生油气藏调整规律认识的局限性制约了该地区的勘探与开发。莫索湾凸起侏罗系三工河组在白垩纪位于古背斜的高部位,是油气的集散地,研究该区古油藏形成及演化过程对指导次生油气藏的发现至关重要。对莫索湾凸起三工河组进行流体包裹体分析和系列定量荧光分析,并结合构造演化史、生烃史和区域埋藏史-热史为古油藏的存在提供了流体证据,分析了其油气充注历史,并预测了次生油气藏的调整方向。研究结果显示:①莫索湾凸起三工河组在早白垩世早期开始接受油气充注形成古油藏,表现在储集层QGF指数大于4,GOI指数大于5 % ,古油藏充注时,油气被矿物捕获形成烃类包裹体,被捕获的两类包裹体荧光颜色和傅里叶红外光谱参数值说明随着烃源岩成熟度逐渐变大,油质也逐渐变轻。②新近纪地层掀斜时,古油藏被破坏,油气发生调整,表现在部分层段QGF指数较高,但是QGF-E强度较低。③莫索湾凸起三工河组经历了不只一期油气充注,推断其混入了侏罗系烃源岩生成的成熟度较低的油气,因为部分层段显示较低的QGF指数和较高的QGF-E强度,且TSF的R1分布范围很大。④构造显示莫索湾古油藏平面范围达700 km2,古油藏被破坏后沿着各低凸带向北线状运移。

关键词: 准噶尔盆地, 莫索湾凸起, 三工河组, 古油藏, 调整演化

Abstract:

The limited recognition of paleo-reservoir distribution in the hinterland of Junggar Basin and adjustment rule for secondary reservoir restrict the petroleum exploration and development in this area. In the Cretaceous, the Jurassic Sangonghe Formations was located at the high position in the Mosuowan Uplift which is a hydrocarbon accumulation and distribution center. A study on the formation and evolution process of paleo-reservoir in the area is vital for guiding the discovery of secondary reservoir. Based on fluid inclusion analysis and a series of quantitative fluorescence analyses on the Sangonghe Formation of Mosuowan Uplift in combination with tectonic evolution history, hydrocarbon generation history, regional burial history and thermal history, this study provided certain fluid evidences for the existence of paleo-reservoir, analyzed the history of oil and gas charging, and made a prediction on the adjustment direction of secondary reservoir.The results show that:(1) paleo-reservoir was formed in the Sangonghe Formation of the Mosuowan uplift through oil and gas charging in the eraly Early Cretacous, manifested as the QGF index of greater than 4 and GOI index of greater than 5 % for oil reservoirs. Hydrocarbon inclusions are formed when hydrocarbons are trapped by minerals during the petroleum charging into reservoir. The fluorescent color of the trapped two types of inclusions and parameter values of Fourier infrared spectrum indicate that oil gradually becomes lighter with the increasing maturity of source rock. (2) When the strata was tilted in the Neogene, paleo-reservoir was destroyed and the oil and gas was adjusted. This is explained by the fact that QGF index is relatively high in partial intervals, while QGF-E intensity is relatively low. (3) The Sangonghe Formation in the Mosuowan uplift experienced more than one stages of oil and gas filling. It is deduced that the low-maturity hydrocarbon generated by the Jurassic source rock was injected, because QGF index is relatively low in partial intervals, and QGF-E intensity is relatively high;the distribution range of TSF R1 is large. (4) The structure shows that the planar range of Mosuowan paleo-reservoir is up to 700 km2, and the paleo-reservoir migrated linearly northward along each low uplift belt after being destroyed.

Key words: Junggar Basin, Mosuowan uplift, Sangonghe Formation, paleo-reservoir, adjustment and evolution

中图分类号: