海洋地质前沿2017，Vol.33Issue(7)：45-54,10.DOI:10.16028/j.1009-2722.2017.07005
南海北部莺—琼盆地CO2成因与成藏特征及其分布规律
GENESIS,ACCUMULATION AND DISTRIBUTION OF CO2 IN THE YINGGEHAI-QIONGDONGNAN BASINS,NORTHERN SOUTH CHINA SEA
摘要
Abstract
Yinggehai-Qiongdongnan Basins are the major gas producers in the north of South China Sea.However,high content of CO2 in some areas restricts the economic efficiency of natural gas exploration.Genesis,accumulation process and distribution pattern of CO2 in natural gas are studied in this paper based on the geochemical characteristics of the natural gas as well as regional geological settings.CO2 in the natural gases in the Yinggehai-Qiongdongnan Basins changes in a broad range in content and has quite complicated origin.There are three types of natural gas accumulation mechanisms controlling the distribution pattern of CO2 in different areas.In the Yinggehai Basin,high content of CO2 in natural gas is controlled by diapir structure and overpressure.In the Qiongdongnan Basin,however,high content of CO2 is related generally to deep fractures and volcanic activities.Based on the distribution pattern of CO2,favorable fields are proposed for exploration of high quality natural gas,such as the middle and deep layers in diapir-affected zones with early gas accumulation,abundant microfractures and good sealing conditions in the Yinggehai Basin,and the areas with good migration and sealing conditions but lack of volcanic activities and deep fractures in the Qiongdongnan Basin.关键词
二氧化碳/成因/成藏/分布规律/优质天然气/莺—琼盆地Key words
carbon dioxide/genesis/accumulation/distribution pattern/high quality of natural gas/Yinggehai-Qiongdongnan Basins分类
天文与地球科学引用本文复制引用
徐新德,张迎朝,熊小峰,甘军,梁刚..南海北部莺—琼盆地CO2成因与成藏特征及其分布规律[J].海洋地质前沿,2017,33(7):45-54,10.基金项目
国家“十三五”重大科技专项“莺琼盆地高温高压天然气富集规律与勘探开发关键技术(三期)”(2016ZX02024-005) （三期）
