琼东南盆地深水东区Y8-1含气构造天然气来源及侧向运聚模式

张迎朝; 甘军; 徐新德; 梁刚; 李兴

doi:10.3799/dqkx.2019.159

Volume 44 Issue 8

Aug. 2019

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Article Navigation > Earth Science > 2019 > 44(8): 2609-2618

Zhang Yingzhao, Gan Jun, Xu Xinde, Liang Gang, Li Xing, 2019. The Source and Natural Gas Lateral Migration Accumulation Model of Y8-1 Gas Bearing Structure, East Deep Water in the Qiongdongnan Basin. Earth Science, 44(8): 2609-2618. doi: 10.3799/dqkx.2019.159

Citation:

Zhang Yingzhao, Gan Jun, Xu Xinde, Liang Gang, Li Xing, 2019. The Source and Natural Gas Lateral Migration Accumulation Model of Y8-1 Gas Bearing Structure, East Deep Water in the Qiongdongnan Basin. Earth Science, 44(8): 2609-2618. doi: 10.3799/dqkx.2019.159

Citation:

Zhang Yingzhao, Gan Jun, Xu Xinde, Liang Gang, Li Xing, 2019. The Source and Natural Gas Lateral Migration Accumulation Model of Y8-1 Gas Bearing Structure, East Deep Water in the Qiongdongnan Basin. Earth Science, 44(8): 2609-2618. doi: 10.3799/dqkx.2019.159

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The Source and Natural Gas Lateral Migration Accumulation Model of Y8-1 Gas Bearing Structure, East Deep Water in the Qiongdongnan Basin

doi: 10.3799/dqkx.2019.159

Zhanjiang Branch of China National Offshore Oil Corporation Ltd., Zhanjiang 524057, China

Received Date: 2019-02-03
Publish Date: 2019-08-15

Abstract

Abstract

Based on the geochemical analyses of natural gases and seismic exploration data,the genesis,sources and lateral migration accumulation of Y8-1 bearing structure were comprehensively analyzed in the East deep water of the Qiongdong Basin. The analyses of C6,C7 light hydrocarbons show that the natural gas of the Y8-1 bearing structure is different from oil-type gas in the northern slope of Songdong sag,and coal-type gas of L17-2 gas field in the deepwater as well. According to the ethane and the propane carbon isotope,the natural gas in the Y8-1 bearing structurehas the mixing characteristics of coal-type gas and oil-type gas. The typical coal-type gas and the oil-type gas in the east Qiongdongnan Basin are selected to be end elements,the natural gas ethane carbon isotope of the Y8-1 bearing structure is calculated as coal-type gas for 53.3% and oil-type gas for 46.7% in the natural gas. The Y8-1 mixing source gas derived from the terrestrial marine source rock of Lower Oligocene Yacheng formation and Eocene lacustrine source rock in Songnan-Baodao sag respectively,and both sets of source rocks have geological conditions for the formation of mature-high mature natural gas. The natural gas generated from the source rocks in the Songnan,Baodao sags migrates along the tectonic ridges,faults,and sandstone carriers for a long distance,thenaccumulatedin the Yacheng formation and granite basement traps in the Songnan low-uplift,East deep water of the Qiongdong Basin.
- genesis of the natural gas,
- light hydrocarbon,
- carbon,
- mixing source gas,
- east deep water,
- Qiongdongnan Basin

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The Source and Natural Gas Lateral Migration Accumulation Model of Y8-1 Gas Bearing Structure, East Deep Water in the Qiongdongnan Basin

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