西南石油大学学报(自然科学版)

• 地质勘探 • 上一篇    下一篇

赣东北地区下寒武统荷塘组页岩储层特征

王冉1,桑树勋1,刘水根2,俞宽坤2,杜艺1   

  1. 1. 中国矿业大学资源与地球科学学院,江苏徐州221008
    2. 江西省煤田地质局二二三地质队,江西鹰潭335000
  • 出版日期:2014-10-01 发布日期:2014-10-01
  • 基金资助:

    江西省重大科技专项(20124ABE02103);江西省重大科技专项(20124ABE02107);江西省重大科技专项(20124ABE02108);中央高校基
    本科研业务费专项资金(2010LKDZ06);江苏高校优势学科建设工程资助项目。

Characteristics of the Shale Gas Reservoir in the Lower Cambrian
Hetang Formation,Northeastern Jiangxi,China

Wang Ran1, Sang Shuxun1, Liu Shuigen2, Yu Kuankun2, Du Yi1   

  1. 1. School of Resource and Earth Science,China University of Mining and Technology,Xuzhou,Jiangsu 221008,China
    2. 223 Geological Team,Jiangxi Provincial Coalfield Geological Bureau,Yingtan,Jiangxi 335000,China
  • Online:2014-10-01 Published:2014-10-01

摘要:

通过显微薄片、扫描电镜及X 射线衍射等对赣东北下寒武统荷塘组44 块黑色泥页岩进行了实验分析,从
地球化学特征、岩石学特征、物性与储集空间特征等方面对泥页岩储层特征进行了研究。研究结果表明:研究区荷
塘组泥页岩厚22.1~735.0 m,单层厚度可达19.59~125.16 m;有机质含量在3.32%~11.40%,平均为5.75%;成熟度为
2.35%~4.90%,总体偏高,属于过成熟阶段;矿物成分主要以石英、黏土矿物、方解石、黄铁矿和白铁矿为主,脆性矿物
含量为18.95%~51.84%,平均含量为40.97%;微孔裂隙发育,形态多样。赣东北荷塘组与北美典型商业性页岩气产区
相比具有差异,主要表现在荷塘组页岩的有效厚度较大、TOC 含量和吸附气比例较高,其不利条件主要表现为埋藏较
深、成熟度过高等方面。

关键词: 赣东北, 下寒武统, 荷塘组, 页岩气, 储层特征

Abstract:

From geochemistry,petrology-physical properties and characteristics of the reservoir space,the shale reservoir
characteristics are studied by microscopic section,scanning electron microscopy and X-ray diffraction experimental analysis of
44 black shales from the lower Cambrian Hetang Formation in northeastern Jiangxi. The results show that the Hetang Formation
shale ranging from 22.1 to 735.0 m,single layer thickness ranges from 19.59 to125.16 meters in the study area. Organic matter
content is high,range from 3.32% to 11.40%,averaging 5.75%,The maturity is high,between 2.35%~4.90%,belonging to a
mature stage. Mineral composition mainly includes quartz,clay minerals,calcite,pyrite and marcasite and its brittle mineral
content is between 18.95%~51.84% with an average content of 40.97%. The microporosity is well developed. The Hetang
Formation has some differences compared to five commercial shale gas producing areas in the U. S. It is thick and contains
brittle mineral. Organic matter content and gas content is high. The adverse conditions is that it is buried deeply and the maturity
is too high.

Key words: northeastern Jiangxi, the lower Cambrian, Hetang Formation, shale gas, reservoir characteristics