石油学报 ›› 2016, Vol. 37 ›› Issue (10): 1231-1246.DOI: 10.7623/syxb201610003

• 地质勘探 • 上一篇    下一篇

塔中地区北坡中-下奥陶统早成岩岩溶作用及储层形成模式

陈红汉1, 吴悠2, 朱红涛1, 鲁子野1, 曹自成3, 云露3   

  1. 1. 中国地质大学资源学院石油地质系 湖北武汉 430074;
    2. 长江大学地球科学学院 湖北武汉 432100;
    3. 中国石油化工股份有限公司西北油田分公司 新疆乌鲁木齐 830011
  • 收稿日期:2016-02-24 修回日期:2016-06-30 出版日期:2016-10-25 发布日期:2016-11-09
  • 通讯作者: 陈红汉,男,1962年9月生,1985年获武汉地质学院石油及天然气地质学专业学士学位,1995年获中国地质大学博士学位,现为中国地质大学(武汉)资源学院石油地质系教授、博士生导师,主要从事油气成藏过程研究和流体包裹体系统分析。Email:hhchen@cug.edu.cn
  • 作者简介:陈红汉,男,1962年9月生,1985年获武汉地质学院石油及天然气地质学专业学士学位,1995年获中国地质大学博士学位,现为中国地质大学(武汉)资源学院石油地质系教授、博士生导师,主要从事油气成藏过程研究和流体包裹体系统分析。Email:hhchen@cug.edu.cn
  • 基金资助:

    国家重点基础研究发展计划(973)项目(2012CB214804)和国家重大科技专项(2008ZX05008-003-30)资助。

Eogenetic karstification and reservoir formation model of the Middle-Lower Ordovician in the northeast slope of Tazhong uplift,Tarim Basin

Chen Honghan1, Wu You2, Zhu Hongtao1, Lu Ziye1, Cao Zicheng3, Yun Lu3   

  1. 1. Department of Petroleum Geology, Faculty of Earth Resources, China University of Geosciences, Hubei Wuhan 430074, China;
    2. School of Geosciences, Yangtze University, Hubei Wuhan 432100, China;
    3. Sinopec Northwest Oil Company, Xinjiang Urumqi 830011, China
  • Received:2016-02-24 Revised:2016-06-30 Online:2016-10-25 Published:2016-11-09

摘要:

高频层序界面下发育的多种类型早成岩岩溶与埋藏阶段沿着断裂带发育的深成岩溶叠加作用,成为深层—超深层碳酸盐岩储层发育的关键要素。在梳理岩溶作用概念的基础上,通过对塔中地区北坡顺南地区深层—超深层中—下奥陶统岩心、薄片岩石学和阴极发光观察以及流体包裹体和稳定氧、碳同位素分析,结合3D地震均方根振幅和古地貌恢复,不仅从微观上识别出了高位体系域上部同生岩溶和层间岩溶作用类型,并从宏观上建立了这种早成岩岩溶储层“准层状”发育模式,认为受控于古地貌和断裂的早成岩岩溶型储层因后续碳酸盐胶结物充填严重,平均残留孔隙度仅约2.0%,但叠加深成岩溶改造了的储层的最高平均孔隙度可达约19%。因此,早成岩岩溶叠加深成岩溶型储层将成为研究区深层—超深层下古生界斜坡带勘探的重要目标。

关键词: 早成岩岩溶, 同生岩溶作用, 准同生岩溶作用, 层间岩溶作用, 中-下奥陶统, 塔里木盆地

Abstract:

Superimposition of multiple types of eogenetic karsts developing under high-frequency sequence boundary and hypogenic karsts developing along fault belts during burial diagenesis becomes a key factor of deep-ultradeep carbonate reservoir development. Based on an outline of karstification concept, deep-ultradeep Middle-Lower Ordovician strata in Shunnan area in the northern slope of Tazhong uplift, Tarim Basin were studied by means of core observation, thin-section petrological observation, cathodoluminescene imaging, fluid inclusion measurement, stable oxygen and carbon isotope analyses, as well as RMS amplitude computation for 3D seismic data and paleotopography restoration; not only syngenetic karst and interstratal karst types in the upper highstand system tract were microscopically identified, but also a "quasi-layered" development model for such eogenetic karst reservoir was established macroscopically. It is believed that, being seriously filled with subsequent carbonate cement, the eogenetic karst-type reservoir controlled by paleotopography and paleofault had a mean residual porosity of just about 2.0%, whereas the reservoir transformed by hypogenic karst superimposition had a maximum mean porosity up to about 19%. Therefore, reservoirs with eogenetic karsts superimposed by hypogenic karsts will become important targets of exploration in deep-ultradeep Lower Paleozoic ramp zone in the study area.

Key words: eogenetic karst, syngenetic karst, penesyngenetic karst, interstratal karst, the Middle-Lower Ordovician, Tarim Basin

中图分类号: