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

被引：0
|
作者：
Du J. [1 ]
Li X. [2 ]
Bao H. [3 ]
Xu W. [4 ]
Wang Y. [2 ]
Huang J. [2 ]
Wang H. [2 ]
Wanyan R. [2 ]
Wang J. [2 ]
机构：
[1] PetroChina Exploration & Production Company, Beijing
[2] Northwest Branch, Research Institute of Petroleum Exploration & Development, PetroChina, Lanzhou
[3] Research Institute of Petroleum Exploration & Development, PetroChina Changqing Oilfield Company, Xi'an
[4] Research Institute of Petroleum Exploration & Development, PetroChina, Beijing
来源：
Shiyou Kantan Yu Kaifa/Petroleum Exploration and Development | 2019年 / 46卷 / 05期
关键词：
Hydrocarbon accumulation geological conditions; Lower Paleozoic; Mesoproterozoic; Natural gas exploration area; Neoproterozoic; Ordos Basin;
D O I：
10.11698/PED.2019.05.03
中图分类号：
学科分类号：
摘要：
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. © 2019, The Editorial Board of Petroleum Exploration and Development. All right reserved.
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页码：820 / 835
页数：15
相关论文
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