油气勘探

鄂尔多斯盆地中新元古界—下古生界天然气成藏地质条件及勘探新领域

  • 杜金虎 ,
  • 李相博 ,
  • 包洪平 ,
  • 徐旺林 ,
  • 王雅婷 ,
  • 黄军平 ,
  • 王宏波 ,
  • 完颜容 ,
  • 王菁
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  • 1. 中国石油勘探与生产分公司,北京 100007;
    2. 中国石油勘探开发研究院西北分院,兰州 730020;
    3. 中国石油长庆油田公司,西安 710018;
    4. 中国石油勘探开发研究院,北京 100083
杜金虎(1958-),男,陕西合阳人,中国石油勘探与生产分公司教授级高级工程师,主要从事石油地质勘探方面的研究和管理工作。地址:北京市东城区东直门大街9号B座,中国石油勘探与生产分公司,邮政编码:100007。E-mail:dujinhu@petrochina.com.cn

收稿日期: 2018-12-26

  修回日期: 2019-06-20

  网络出版日期: 2019-09-17

Geological conditions of natural gas accumulation and new exploration areas in the Mesoproterozoic to Lower Paleozoic of Ordos Basin, NW China

  • DU Jinhu ,
  • LI Xiangbo ,
  • BAO Hongping ,
  • XU Wanglin ,
  • WANG Yating ,
  • HUANG Junping ,
  • WANG Hongbo ,
  • WANYAN Rong ,
  • WANG Jing
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  • 1. PetroChina Exploration & Production Company, Beijing 100007, China;
    2. Northwest Branch, Research Institute of Petroleum Exploration & Development, PetroChina, Lanzhou 730020, China;
    3. Research Institute of Petroleum Exploration & Development, PetroChina Changqing Oilfield Company, Xi’an 710018, China;
    4. Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China;

Received date: 2018-12-26

  Revised date: 2019-06-20

  Online published: 2019-09-17

Supported by

国家自然科学基金项目(41772099,41872116); 中国石油天然气股份有限公司重大科技专项“长庆油田5000万吨持续高效稳产关键技术研究与应用”(2016E-0502)

摘要

基于野外露头调查、钻井及地震资料解释,并借鉴大量前人研究成果,从华北克拉通裂解演化、祁连—秦岭洋盆开合演化角度出发,对鄂尔多斯盆地古老海相烃源岩特征、有利储集相带、油气运移方向及成藏规律进行了研究。主要取得以下4点认识:①受深水陆棚-海湾控制,鄂尔多斯盆地及周缘发育中新元古界、下寒武统底部和中上奥陶统3套烃源岩;②受滨岸环境、古隆起及台地边缘控制,区内发育中新元古界—下寒武统滨浅海石英砂岩、中上寒武统—奥陶系风化壳与白云石化储集层及奥陶系“L”形台缘礁滩体4类储集层系;③研究区成藏组合变化较大,台内以“上生下储”为主,“自生自储”次之;台缘带既有“上生下储”,也有“自生自储”。此外,在深大断裂与长城系古裂陷槽沟通的情况下,台内与台缘还可能存在“下生上储”组合;④研究区存在庆阳古隆起前石炭纪风化壳、盆地西南缘“L”形台缘带、盆地中东部奥陶系盐下组合及中新元古界—寒武系4个勘探领域,其中前石炭纪风化壳、“L”形台缘相带是较为现实的接替领域,奥陶系盐下组合及盆地深层中新元古界—寒武系等领域具有一定潜力,值得探索。图10表1参47

本文引用格式

杜金虎 , 李相博 , 包洪平 , 徐旺林 , 王雅婷 , 黄军平 , 王宏波 , 完颜容 , 王菁 . 鄂尔多斯盆地中新元古界—下古生界天然气成藏地质条件及勘探新领域[J]. 石油勘探与开发, 2019 , 46(5) : 820 -835 . DOI: 10.11698/PED.2019.05.03

Abstract

Based on field outcrop investigation, interpretation and analysis of drilling and seismic data, and consulting on a large number of previous research results, the characteristics of ancient marine hydrocarbon source rocks, favorable reservoir facies belts, hydrocarbon migration direction and reservoir-forming law in the Ordos Basin have been studied from the viewpoints of North China Craton breakup and Qilian-Qinling oceanic basin opening and closing. Four main results are obtained: (1) Controlled by deep-water shelf-rift, there are three suites of source rocks in the Ordos Basin and its periphery: Mesoproterozoic, Lower Cambrian and Middle-Upper Ordovician. (2) Controlled by littoral environment, paleo-uplift and platform margin, four types of reservoirs are developed in the area: Mesoproterozoic- Lower Cambrian littoral shallow sea quartz sandstone, Middle-Upper Cambrian-Ordovician weathering crust and dolomitized reservoir, and Ordovician L-shape platform margin reef and beach bodies. (3) Reservoir-forming assemblages vary greatly in the study area, with “upper generation and lower storage” as the main pattern in the platform, followed by “self-generation and self-storage”. There are both “upper generation and lower storage” and “self-generation and self-storage” in the platform margin zone. In addition, in the case of communication between deep-large faults and the Changchengian system paleo-rift trough, there may also exist a “lower generation and upper reservoir” combination between the platform and the margin. (4) There are four new exploration fields including Qingyang paleo-uplift pre-Carboniferous weathering crust, L-shape platform margin zone in southwestern margin of the basin, Ordovician subsalt assemblage in central and eastern parts of the basin, and Mesoproterozoic-Cambrian. Among them, pre-Carboniferous weathering crust and L-shape platform margin facies zone are more realistic replacement areas, and Ordovician subsalt assemblage and the Proterozoic- Cambrian have certain potential and are worth exploring.

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