西南石油大学学报(自然科学版)

• 地质勘探 • 上一篇    下一篇

玛南地区乌尔禾组成岩作用对储层物性的影响

陈波1,2 *,尤新才3,张银4,张顺存1,史基安1   

  1. 1. 甘肃省油气资源研究重点实验室· 中国科学院油气资源研究重点实验室,甘肃兰州730000;2. 中国科学院大学,北京石景山100049;
    3. 中国石油新疆油田公司勘探开发研究院,新疆克拉玛依834000;4. 中国石油新疆油田公司工程技术研究院,新疆克拉玛依834000
  • 出版日期:2016-02-01 发布日期:2016-02-01
  • 通讯作者: 陈波,E-mail:cbo 11@163.com
  • 基金资助:

    国家重点基础研究发展计划(973 计划)(2011CB201104);国家科技重大专项(2011ZX05000 01 06);甘肃省重点实验室专项(1309-
    RTSA041)。

Effects of Diagenesis and Reservoir of the Urho Formation in#br# Manan Region

CHEN Bo1,2*, YOU Xincai3, ZHANG Yin4, ZHANG Shuncun1, SHI Jian1   

  1. 1. Provincial Key Laboratory of Petroleum Resources,Key Laboratory of Petroleum Resources Research,Institute of Geology and Geophysics,
    Chinese Academy of Sciences,Lanzhou,Gansu 730000,China;2. University of Chinese Academy of Sciences,Beijing 100049,China;3. Research
    Institute of Exploration and Development,Xinjiang Oilfield Company,PetroChina,Karamay,Xinjiang 834000,China;4. Engineering Technology
    Research Institute of Xinjiang Oilfield Company,PetroChina,Karamay,Xinjiang 834000,China
  • Online:2016-02-01 Published:2016-02-01

摘要:

利用岩芯观察、铸体薄片鉴定、扫描电镜、X 衍射分析方法并结合测录井等资料,对准噶尔盆地玛南地区二
叠系乌尔禾组储层的岩石学特征、成岩作用及其对储层物性的影响作用进行了研究。结果表明:研究区储集岩以砾岩
为主,发育少量砂岩,成分成熟度和结构成熟度均较低。目前研究区储层成已处于中成岩阶段B 期,成岩作用复杂,
对储层物性影响较大的成岩作用主要有压实作用、胶结作用和溶蚀作用,其中压实作用对研究区储层的孔隙破坏性最
大,是导致储层低孔低渗的根本原因;胶结作用对储层物性影响具有双面性,胶结物的发育一方面减少了储层孔隙度,
但亦在一定程度上抵御了压实应力,并为后期溶蚀作用的发生提供了物质基础;研究区储层埋藏较深,经历了较强的
压实和胶结作用,储层物性差,而溶蚀作用形成的次生孔隙有效地改善了储层物性,是研究区在低孔低渗背景下形成
局部相对优质储层的重要途径。

关键词: 准噶尔盆地, 玛南地区, 二叠系, 乌尔禾组, 成岩作用, 储层物性

Abstract:

Using core observation,casting thin sections identification,scanning electron microscopy(SEM),X-ray diffraction
analysis method with logging and mud logging data,the characteristics of reservoir sandstone,diagenesis and its influence on
reservoir physical property of the Permian Urho Formation in Manan region,Junggar Basin were studied. The results show that
the reservoir rock types in the study area are mainly conglomerate,and a small amount of sandstone;reservoir compositional
maturity and textural maturity are low. At present,the reservoir in the study area is mainly at the middle diagenetic stage B
period,and reservoir experienced complicated diagenesis;the main diagenesis that has a greater influence on the reservoir
property includes compaction,cementation and dissolution;the compaction effect of the reservoirs in the study area is the most
devastating,being root of low porosity and low permeability reservoirs;cementation has two-sided influence on reservoir on
the one hand. On the other hand,cement reduces the reservoir porosity,but also resists the compaction stress to a certain
extent,and provides the material foundation for the later dissolution. The reservoir in the study area is deeply buried,and has
experienced strong compaction and cementation. Therefore,reservoir property is poor,but is improved by the dissolution of
secondary pore,which is an important approach to relatively high quality reservoirs in the study area under the background of
low porosity and low permeability.

Key words: Junggar Basin, Manan region, Permian, Urho Formation, diagenesis, reservoir property

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