石油学报 ›› 2008, Vol. 29 ›› Issue (5): 694-700.DOI: 10.7623/syxb200805011

• 地质勘探 • 上一篇    下一篇

塔中顺西区块奥陶系礁滩复合体裂缝特征及成因

李鹏春1,2, 刘春晓1,3,4, 张渊1, 龙利平1, 张利红1, 任淑芳5   

  1. 1. 中国石化中原油田分公司物探研究院, 河南濮阳, 457001;
    2. 中国科学院地质与地球物理研究所, 北京, 100029;
    3. 中国科学院海洋研究所, 山东青岛, 266071;
    4. 中国科学院研究生院, 北京, 100049;
    5. 中国石油塔里木油田公司天然气事业部, 新疆库尔勒, 841000
  • 收稿日期:2007-11-10 修回日期:2008-01-07 出版日期:2008-09-25 发布日期:2010-05-21
  • 作者简介:李鹏春,男,1978年11月生,2006年获中国科学院广州地球化学研究所博士学位,现为中国石化中原油田博士后工作站在站博士后.主要从事构造地质与石油地质研究.E-mail:lpcjpi@163.com
  • 基金资助:
    国家自然科学基金项目(No.40702008和No.40701133)资助

Characteristics and origins of fractures developed in Ordovician reef-bank complex in Shunxi area of central Tarim Basin

LI Pengchun1,2, LIU Chunxiao1,3,4, ZHANG Yuan1, LONG Liping1, ZHANG Lihong1, REN Shufang5   

  1. 1. Geophysical Research Institute, Sinopec Zhongyuan Oilfield Company, Puyang 457001, China;
    2. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;
    3. Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;
    4. Graduate School of Chinese Academy of Sciences, Beijing 100049, China;
    5. Department of Natural Gas, PetroChina Tarim Oilfield Company, Korla 841000, China
  • Received:2007-11-10 Revised:2008-01-07 Online:2008-09-25 Published:2010-05-21

摘要: 对岩心、薄片、铸体薄片的观察及阴极发光、成像测井的解释结果表明,塔中顺西区块奥陶系良里塔格组礁滩复合体发育复杂的裂缝系统,按其形态可分为垂直裂缝、高角度裂缝和水平裂缝。该裂缝系统在纵向上存在明显的旋回性发育,在成因上具有多期复合叠合的特点。根据其成因,可以分为非构造成因裂缝和构造成因裂缝。根据力学属性,构造成因裂缝又可分为张性裂缝、张剪性裂缝和剪切裂缝。裂缝部分被方解石完全充填或半充填,部分未被充填而呈开启状,其中以未充填或半充填的高角度裂缝较发育,对油气储聚具有重要作用。根据裂缝充填特征和切割关系,结合区域构造演化史,构造成因裂缝可划分为晚加里东期—早海西期、晚海西期—印支期和燕山期—喜山期3个成因期次。裂缝的发育主要受岩石自身力学特性、构造应力场、构造运动、断裂活动及火山作用的控制。

关键词: 塔中地区, 奥陶系, 礁滩复合体, 裂缝特征, 控制因素

Abstract: The observation and measurement of cores,thin slices,casting body slices,cathode luminescence and FMI well logging interpretations indicate that fracture systems with clear cyclicity in vertical direction are developed in the Ordovician reef-bank complex in Shunxi area of the central Tarim Basin and divided into vertical fracture,high-angle fracture and horizontal fracture in the morphology.According to the multi-period composite and superimposed characteristics of fracture origin,the fracture systems can also be divided into non-structural genetic fracture and structural genetic fracture.The later can be mechanically classified into tensile fracture,tensile-shear fracture and shear fracture.Some fractures are filled by sparry calcite,some ones are half-filled,and some ones are unfilled.The unfilled and half-filled fractures are well developed and have significant role for hydrocarbon storage and accumulation.According to filling characteristics and incised relationships between fractures as well as regional tectonic evolution history,the structural genetic fracture can be further divided into three stages,including the late Caledonian-early Hercynian stage,late Hercynian-Indosinian stage and Yanshanian-Himalayan stage.The development of fracture is mainly controlled by mechanical property of limestone,tectonic stress field,tectonic movement,fault activity and volcanism.

Key words: central Tarim Basin, Ordovician, reef-bank complex, fracture characteristics, controlling factors

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