吉林大学学报(地球科学版) ›› 2017, Vol. 47 ›› Issue (6): 1631-1641.doi: 10.13278/j.cnki.jjuese.201706103

• 地质与资源 • 上一篇    下一篇

开江梁平台内海槽东段长兴组白云岩储层沉积-成岩系统研究

张兵1, 杨凯1, 贾雪丽2, 郑荣才3, 郭强1, 文华国3   

  1. 1. 成都理工大学地球物理学院, 成都 610059;
    2. 中国石油吐哈油田勘探开发研究院, 新疆 哈密 839009;
    3. 成都理工大学沉积地质研究院, 成都 610059
  • 收稿日期:2017-03-07 出版日期:2017-11-26 发布日期:2017-11-26
  • 作者简介:张兵(1981-),男,副教授,博士,主要从事沉积学、石油地质学研究,E-mail:zb4819890@qq.com
  • 基金资助:
    教育部高等学校博士学科点专项科研基金项目（20135122120011）

Sedimentary-Diagenetic Systems of Dolomite Reservoir in Changxing Formation in the Eastern Kaijiang-Liangping Intraplatform Trough

Zhang Bing1, Yang Kai1, Jia Xueli2, Zheng Rongcai3, Guo Qiang1, Wen Huaguo3   

  1. 1. College of Geophysics, Chengdu University of Technology, Chengdu 610059, China;
    2. Institute of Petroleum Exploration and Production, PetroChina Tuha Oilfield Company, Hami 839009, Xinjiang, China;
    3. Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, China
  • Received:2017-03-07 Online:2017-11-26 Published:2017-11-26
  • Supported by:
    Supported by Research Fund for Doctoral Program of Higher Education of China (20135122120011)

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摘要： 为了指导部署四川盆地白云岩储层中钻井，在油气钻井岩心观察与描述、野外剖面实测和样品采集的基础上，结合镜下薄片鉴定、X衍射、物性和地球化学特征分析，对开江梁平台内海槽东段长兴组白云岩储层的沉积-成岩系统进行了深入研究。认为台地边缘生物礁和台地边缘浅滩为最重要的储集相带，颗粒白云岩、生物礁白云岩和晶粒白云岩为最主要的储集层岩性，晶间孔、晶间溶孔和超大溶孔为目的层最有效的储集空间，孔洞缝复合型储层为目的层最优质的储集类型。综合分析认为，长兴组沉积-成岩系统与白云岩储层在时空上具有良好的耦合关系，台地边缘生物礁和台地边缘浅滩相控制了白云岩储层的区域分布范围，而不同成岩系统对储层的贡献程度不同。其中：地层封存卤水与混合热卤水成岩系统是储层形成的基础与关键，地层封存卤水形成低孔低渗的孔隙型Ⅲ类储层，混合热卤水形成中孔中渗的孔洞型Ⅱ类储层；构造热液成岩系统对储层贡献最大，并形成高孔高渗的孔洞缝复合型Ⅰ类优质储层。

关键词: 开江梁平台内海槽, 长兴组, 白云岩, 沉积相, 储层类型, 沉积-成岩系统

Abstract: In order to guide the deployment of drilling in dolomite reservoir of Sichuan basin. Based on oil and gas drilling core observation and description, field profile measurement and sample collection, combined with microscopic thin section identification、X-ray diffraction、physical parameter and geochemical characteristics analysis, we studied the reservoir sedimentary-diagenetic system about the dolomites in Changxing Formation of the eastern inland sea trough in Kaijiang-Liangping. It is considered that the platform margin reef and platform marginal shoal are the most important reservoir facies belts, The main reservoir lithology is of grain dolomite, biological reef dolomite,and crystalline dolomite. The most effective reservoir spaces are intergranular solution pores, intercrystalline pores,and super solution pores. The composite reservoirs with holes and seams are the best reservoir type. Comprehensive analysis showed that the sedimentary diagenetic system of the Changxing Formation has a good coupling relationship with dolomite reservoir in time and space. The distribution of Changxing Formation dolomite reservoir is controlled by the platform margin reef and platform marginal shoal facies, and the contribution of different diagenetic system to reservoir is different. Among them, the formation sealing brine and mixed hot brine diagenetic system are the foundation and key for reservoir formation:the former is of Type Ⅲ pores with low porosity and low permeability, and the latter is of TypeⅡ pores with middle porosity and permeability. The structural hydrothermal diagenesis system has the biggest contribution to the reservoir, which can form high quality Type I reservoirs.

Key words: Kaijiang-Liangping intraplatform trough, Changxing Formation, dolomite, sedimentary facies, reservoirs types, sedimentary-diagenetic systems

中图分类号: 

  • P618.1
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