天然气地球科学

• 天然气地质学 • 上一篇    下一篇

南华北盆地禹州地区ZK0606钻孔上古生界煤系烃源岩评价

邢 舟 ,曹高社,毕景豪,周新桂 ,张交东   

  1. 1.河南理工大学资源环境学院,河南 焦作 454000;
    2.中原经济区煤层(页岩)气河南省协同创新中心,河南 焦作 454000;
    3.中国地质调查局油气资源调查中心,北京 100029
  • 收稿日期:2017-07-30 修回日期:2018-03-05 出版日期:2018-04-10 发布日期:2018-04-10
  • 通讯作者: 曹高社(1965-),男,河南沁阳人,教授,博士,主要从事构造地质研究. E-mail:caogs@hpu.edu.cn
  • 作者简介:邢舟(1990-),男,河南濮阳人,硕士研究生,主要从事沉积学和石油地质研究.E-mail:1053578228@qq.com.
  • 基金资助:

    全国油气资源战略选区调查与评价(编号:1211302108023-2)资助.

The evaluation of Upper Paleozoic hydrocarbon source rocks of ZK0606 in Yuzhou region at southern North China Basin

Xing Zhou ,Cao Gao-she,Bi Jing-hao ,Zhou Xin-gui,Zhang Jiao-dong   

  1. 1.Institute of Resources & Environment,Henan Polytechnic University,Jiaozuo 454000,China;
    2.Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region,Henan Province,Jiaozuo 454000,China;
    3.Oil & Gas Survey Center,China Geological Survey,Beijing 100029,China
  • Received:2017-07-30 Revised:2018-03-05 Online:2018-04-10 Published:2018-04-10

摘要:

南华北盆地禹州地区上古生界含煤地层具有良好的非常规油气勘探前景,但对该地区潜在烃源岩缺少系统的评价。研究选取禹州地区上古生界揭露较全的全取心ZK0606钻孔,对上古生界煤岩、泥岩和碳酸盐岩系统地取样,并进行有机碳、岩石热解、氯仿沥青“A”、有机显微组分、镜质体反射率和干酪根碳同位素分析。结果表明:禹州地区ZK0606钻孔上古生界烃源岩不仅包括煤岩和泥岩,碳酸盐岩也可作为潜在烃源岩;纵向上,烃源岩主要分布于太原组和山西组下部,较为连续,山西组上部、下石盒子组烃源岩主要分布在煤层(线)附近,控制厚度较小,上石盒子组基本不发育烃源岩,烃源岩纵向上的分布规律主要与晚古生代的海侵作用有关;ZK0606钻孔上古生界煤岩和泥岩烃源岩有机质类型为Ⅲ型,碳酸盐岩有机质类型也为Ⅲ型,明显有别于一般碳酸盐岩的有机质类型,此与该区碳酸盐岩特殊的沉积环境有关;ZK0606钻孔上古生界烃源岩热演化程度达到成熟—高成熟阶段,具有随深度增加而逐渐增大的趋势,较高的热演化程度可能与该区较高的地温梯度有关。根据烃源岩的基本特征,结合煤层气和页岩气的评价方法,山西组二1煤及其上下部的泥岩应是煤层气和页岩气最主要的勘探目的层,白沙向斜的南东侧应是重点勘探的区域。

关键词: 上古生界, 烃源岩, 煤层气, 页岩气, 评价, 禹州地区

Abstract:

The Upper Paleozoic coal-bearing strata in Yuzhou region at southern North China Basin have good exploration potential for unconventional hydrocarbon reservoirs,therefore systematic evaluation of potential source rocks is indispensable.This study selected full core hole ZK0606 which perfectly revealed Upper Paleozoic,systematically collected samples of coal rocks,mudstones and carbonate rocks of Upper Paleozoic,and analyzed the samples to obtain the parameters of TOC,hydrocarbon generation potential,chloroform bitumen “A”,organic maceral,vitrinite reflectance and kerogen carbon isotopes.Test results show that coal rocks,mudstones and carbonate rocks are all possibly potential source rocks in the Upper Paleozoic.Vertically the source rocks are continuous in Taiyuan Formation and the lower part of Shanxi Formation,mainly distribute in the nearby coal bed with small thickness in the upper part of Shanxi Formation and Xiashihezi Formation,seldomly in the Shangshihezi Formation.The vertical distributional regularity of source rocks is mainly related to Late Paleozoic transgression.The kerogen type of coal rocks and mudstones are type Ⅲ,but the carbonate rocks are also mainly type Ⅲ,apparently different from the general carbonate rocks,this abnormal phenomenon mainly attributes to the special sedimentary environment of the carbonate rocks.The thermal evolution degree of Upper Paleozoic source rocks of ZK0606 has reached mature-highly mature stage,and RO increased gradually by depth.The higher degree of thermal evolution may relate to the higher paleogeothermal gradient in this area.According to the essential characteristics of source rocks and the evaluation methods of coal-bed methane and shale gas,the Ⅱ1 coal layer and its upper and lower mudstone of Shanxi Formation are the main target layers of coal-bed methane and shale gas exploration,and the southeast part of Baisha syncline is a key exploration area.

Key words: The Upper Paleozoic, Source rock, Coal-bed methane, Shale gas, Evaluation, Yuzhou region

中图分类号: 

  • TE122.1+15

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