琼东南盆地天然气水合物成矿远景

doi:10.13278/j.cnki.jjuese.20170033

摘要/Abstract

摘要： 琼东南盆地最新的水合物调查研究发现了大量疑似BSR（bottom simulating reflector）特征的地震反射界面，但BSR特征并不典型。为了解决在BSR特征不甚明显的地区进行天然气水合物识别和成矿远景研究的问题，本文首先通过对调查所取得的第一手资料的综合分析，指出了琼东南盆地海域天然气水合物地球物理标识——BSR识别的局限性；然后从天然气水合物成藏所必须具备的气源、运移通道、有利沉积条件等几个方面出发，探讨了琼东南盆地天然气水合物成藏必须具备的气源、气体运通道和储层等特征，对琼东南盆地天然气水合物地球物理识别标志——BSR判识提供了良好佐证。综合分析认为：琼东南盆地海域的中央坳陷带内发育了大量气烟囱的位置及其附近海底浅层应是天然气水合物发育的重点目标区。

关键词: 天然气水合物, 烃源岩, 运移通道, BSR, 琼东南盆地

Abstract: The latest survey and study in the Qiong Dongnan basin found a lot of seismic reflection interfaces with suspected BSR (bottom simulating reflector) features, but the BSR features aren't typical. Accurate identification of BSB is very important for evaluation of gas hydrates. To evaluate gas hydrates is a challenge where BSR features aren't obvious. We conducted the correlative analyses between the gas hydrate occurrence and tectonics, sedimentation, and origin gas. All evidences indicate that in the central depression belt of the Qiong Dongnan basin, a large number of gas chimneys and the shallow sea bottom near the seabed should be the key target areas for the development of natural gas hydrates. This study will help to find out the conditions of the mineralization of gas hydrates, and contribute to the resource assessment of gas hydrates.

Key words: gas hydrate, hydrocarbon source rock, gas migrate passage, bottom simulating reflectors, Qiong Dongnan basin

中图分类号:

P618.13

龚跃华, 杨胜雄, 王宏斌, 梁金强, 梁劲. 琼东南盆地天然气水合物成矿远景[J]. 吉林大学学报(地球科学版), 2018, 48(4): 1030-1042.

Gong Yuehua, Yang Shengxiong, Wang Hongbin, Liang Jinqiang, Liang Jin. Prospect of Gas Hydrate Resources in Qiong Dongnan Basin[J]. Journal of Jilin University(Earth Science Edition), 2018, 48(4): 1030-1042.

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