石油学报 ›› 2013, Vol. 34 ›› Issue (5): 896-904.DOI: 10.7623/syxb201305010

• 地质勘探 • 上一篇    下一篇

辽河盆地东部凹陷火山岩储层特征与主控因素

王岩泉1, 胡大千1, 蔡国刚2, 王璞珺1, 于小健1   

  1. 1. 吉林大学地球科学学院 吉林长春 130061;
    2. 中国石油辽河油田公司勘探开发研究院 辽宁盘锦 124010
  • 收稿日期:2013-01-08 修回日期:2013-03-29 出版日期:2013-09-25 发布日期:2013-08-01
  • 通讯作者: 王璞珺,男,1959年10月生,1982年获长春地质学院学士学位,1994年获长春地质学院博士学位,现为吉林大学地球科学学院教授、博士生导师,主要从事盆地火山岩和油气地质勘查研究与教学。Email:wangpj@jlu.edu.cn
  • 作者简介:王岩泉,男,1988年11月生,2011年获中国地质大学学士学位,现为吉林大学博士研究生,主要从事矿物学和火山岩储层方面的研究。Email:wang_yan_quan@126.com
  • 基金资助:

    国家重点基础研究发展计划(973)项目(2009CB219303)和吉林大学科学前沿与交叉学科创新项目(201103032)资助。

Characteristics and controlling factors of Cenozoic volcanic reservoirs in Liaohe Basin, NE China

WANG Yanquan1, HU Daqian1, CAI Guogang2, WANG Pujun1, YU Xiaojian1   

  1. 1. College of Earth Sciences, Jilin University, Changchun 130061, China;
    2. Research Institute of Petroleum Exploration and Development, PetroChina Liaohe Oilfield Company, Panjin 124010, China
  • Received:2013-01-08 Revised:2013-03-29 Online:2013-09-25 Published:2013-08-01

摘要:

基于21口钻井的地质与测井资料和193块岩石样品的物性测试结果,结合火山岩构造-岩相图和产能资料分析,研究了辽河盆地东部凹陷沙河街组三段火山岩储层特征及其主控因素。结果显示,本区发育11种火山岩,其中粗面岩为主要储集岩类;岩相分为5大类14亚类,有利储层多见于侵出相;发育5个火山岩旋回,成藏主要集中在中部的粗面岩旋回;储集空间分为2大类9种类型,其中裂缝是渗透率的主控因素。有效储层主要受断裂、喷发旋回、岩相、岩性4方面控制。沿大型走滑断裂,尤其主断裂与派生断裂交汇部位,火山岩储层集中发育,断裂控制火山岩体的空间展布和次生裂缝发育程度;喷发旋回控制储层的纵向分布;岩相控制储层的规模和原生孔缝发育带;岩性决定储集空间类型及后期蚀变改造程度。

关键词: 辽河盆地, 沙河街组, 火山岩储层, 主控因素, 断裂, 火山喷发旋回, 火山岩岩相

Abstract:

A database involved in the present research includes well-logs and corresponding geological description of 21 boreholes, analytical results of porosity and permeability of 193 rock samples, 3D seismic data of the region and structure-lithofacies mapping of Cenozoic volacanic reservoirs in the eastern depression of the Liaohe Basin. Based on these data, 11 types of volcanic rocks are recognized, among them trachyte is the best for reservoir development. 5 lithofacies and 14 sub-facies are classified, of which the extrusive facies is the most favorable one of effective volcanic reservoirs. 5 cycles are identified in the volcanic rock and the reservoir formation mainly are developed in cycle 3, which is in the middle of the volcanic cycles. The reservoir space can be grouped into 2 types, primary and secondary ones, which can be subdivided into 9 sub-types and 14 species. Fractures of tectonic origin are a main controlling factor on the permeability of these reservoirs. In fact, effective reservoirs are an optimized combination of the four factors, i.e. fracture, eruption cycle, lithofacies and lithology. Volcanic reservoirs here concentrate within or around large-scale strike-slip fault zones, especially at a conjunction of main faults and induced faults. Furthermore, faults control spatial distribution of volcanic rocks and development of secondary fractures, while eruption cycles dominate vertical distribution of effective volcanic reservoirs; lithofacies controls reservoir scale and development of primary pores, while lithology determines types of reservoir space and intensity of alteration that results in the secondary porosity.

Key words: Liaohe Basin, Shahejie Formation, volcanic reservoir, controlling factors, fault, cycle of volcanic eruption, volcanic lithofacies

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