| 郭明刚,朱继田,曾小宇,孙志鹏.琼东南盆地深水区宝岛-长昌凹陷火山/岩浆底辟分布及CO2充注风险分析[J].地质找矿论丛,2017,32(1):82-92 |
| 琼东南盆地深水区宝岛-长昌凹陷火山/岩浆底辟分布及CO2充注风险分析 |
| Volcano/magma diapir distribution and analysis of CO2 injection risk in Baodao-Changchang Sag of deepwater area in Qiongdongnan Basin |
| 投稿时间：2016-01-26 |
| DOI：10.6053/j.issn.1001-1412.2017.01.010 |
| 中文关键词: 琼东南盆地 宝岛-长昌凹陷 火山/岩浆底辟 CO2充注风险 |
| 英文关键词:Qiongdongnan basin baodao-changchang sag volcano/magma diaper CO2 injection risk |
| 基金项目:"十二五"国家科技攻关重大专项"南海北部深水区潜在富生烃凹陷评价"（编号：2011ZX05025-002）资助。 |
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| 中文摘要: |
| 琼东南盆地深水区石油勘探面临的幔源CO2风险主要集中于其东区的宝岛-长昌凹陷，目前已在宝岛凹陷北缘发现多个高CO2含量气层。文章基于地震火山地层学原理，利用地震相分析技术，识别火山/岩浆底辟分布，分析其分布规律和控制因素。结果表明，宝岛-长昌区的火山/岩浆底辟呈串珠状集中分布在（潜伏）深大断裂附近，凹陷中心的火山分布集中且规模大；中新统为火山最活跃时期，其控制因素主要为地幔上涌、断裂活动、沉积盖层厚度等。通过分析火山/岩浆底辟类型及分布、输导体系、宝南断阶带成藏之间的时空配置关系，认为宝南断阶带整体来看CO2风险较小，特别是主要目的层陵三段。 |
| 英文摘要: |
| At present, the exploration in deepwater of Qiongdongnan Basin is facing with mantle-derived CO2 risk, especially in Baodao-Changchang Sag, the eastern deepwater area. Multiple high CO2-bearing gas layers have been found in northern margin of Baodao Sag. This paper is based on seismic volcanic stratigraphic theory and uses seismic phase analysis technique to recognize volcano/magma diaper distribution and analyze the distribution pattern and the control factors. The result shows that in Baodao-Changchang Sag the volcano/magma diapers occur as bead in strings along deep fault; in center of the sag are concentrated big volcanoes; upwelling of the mantle, fault activity and thickness of sediment cover during peak active volcanism in Miocene epoch are the main control factors. Based on spatial-temporal relationship analysis of the volcano/magma diapir types and the distribution pattern carrier systems and accumulation conditions, the risk in Baonan step-fault zone is lower, especially in the major target, 3rd member of Lingshui Formation. |
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