石油学报 ›› 2013, Vol. 34 ›› Issue (增刊一): 112-119.DOI: 10.7623/syxb2013S1013

• 地质勘探 • 上一篇    下一篇

黄骅坳陷大港探区深层天然气成因类型与分布规律

国建英1, 李剑1, 于学敏2, 王东良1, 付立新2, 郝爱胜1, 崔会英1   

  1. 1. 中国石油勘探开发研究院廊坊分院 中国石油天然气集团公司天然气成藏与开发重点实验室 河北廊坊 065007;
    2. 中国石油大港油田公司勘探开发研究院 天津大港 300280
  • 收稿日期:2013-03-26 修回日期:2013-07-01 出版日期:2013-09-25 发布日期:2013-09-15
  • 通讯作者: 国建英
  • 作者简介:国建英,男,1971年12月生,2002年获河北大学学士学位,2009年获中国矿业大学(北京)博士学位,现为中国石油勘探开发研究院廊坊分院高级工程师,主要从事油气地球化学及成藏研究工作。Email:gjy_17711224@petrochina.com.cn
  • 基金资助:

    国家重大科技专项(2011ZX05007)资助

Origin and distribution of deep natural gas in Dagang exploration area of Huanghua depression

GUO Jianying1, LI Jian1, YU Xuemin2, WANG Dongliang1, FU Lixin2, HAO Aisheng1, CUI Huiying1   

  1. 1. Langfang Branch, PetroChina Research Institute of Exploration and Development; CNPC Key Laboratory of Gas Reservoir Formation and Development, Langfang 065007, China;
    2. Research Institute of Exploration and Development, PetroChina Dagang Oilfield Company, Dagang 300280, China
  • Received:2013-03-26 Revised:2013-07-01 Online:2013-09-25 Published:2013-09-15

摘要:

通过综合应用天然气组分、碳同位素、氢同位素、轻烃及岩石热解碳同位素等地球化学参数,结合地质背景分析,对大港探区深层天然气的成因类型、来源及分布规律进行了研究。结果表明,大港探区深层天然气以热成因气为主,主要处于成熟—高成熟阶段;按母质类型及来源可进一步划分为煤成气、非煤成煤型气和油型气。深层天然气的分布严格受源岩的控制,煤成气分布于探区中南部的埕北地区、孔店地区及孔南地区;非煤成煤型气主要分布在中北部地区,包括板桥次凹、歧口主凹中北部及夹于这2个凹陷间的北大港潜山构造带;油型气主要分布在歧口主凹的南部、歧北次凹和歧南次凹及其周缘。煤成气主要来自石炭系—二叠系煤系烃源岩,非煤成煤型气和油型气主要来自古近系沙河街组二、三段烃源岩。大港探区深层天然气勘探前景广阔。

关键词: 深层天然气, 地球化学, 成因类型, 分布规律, 大港探区, 黄骅坳陷

Abstract:

This study investigates origin, distribution, and source of deep natural gas in Dagang Exploration Area (DEA), Huanghua depression through a combined analysis of available geochemical data (natural gas compositions, carbon and hydrogen isotopes, light hydrocarbons, and rock-pyrolytic carbon isotope) and geological setting. Results show that deep natural gas in DEA is dominated by thermogenic gas at the stage of maturity-high maturity, which can be classified into three types in terms of type and source of parent materials, i.e., coal-derived gas, coal-type gas, and oil-type gas. The distribution of deep natural gas is strictly controlled by availability of source rocks. Coal-derived gas is mainly distributed in Chengbei, Kongdian, and Kongnan areas in the middle-southern part of DEA.Coal-type gas is mainly distributed in the middle-northern part of DEA, including Banqiao sub-sag, middle-northern Qikou sag, and the northern Dagang buried hill belt inbetween. Oil-type gas mainly occurs in southern Qikou sag, Qibei sub-sag, and periphery of Qinan sub-sag. Coal-derived gas is mainly generated from Carboniferous-Permian source rocks, while coal-and oil-type gases are mainly generated from the second and third members of the Paleogene Shahejie Formation. This work demonstrates that DEA is of great potential for deep gas exploration.

Key words: deep natural gas, geochemistry, gas origin, distribution pattern, Dagang exploration area, Huanghua depression

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