摘要
根据在青海木里三露天施工完成的14口天然气水合物钻孔揭露的地质信息,从天然气水合物产出、赋存、空间展布3个方面介绍工作区天然气水合物基本特征。此外,文章还以岩性特征、空间展布、裂隙、岩石物性多元控制因素间相互制约和促进的内在联系为桥梁建立了天然气水合物储层这一研究对象。从储层方面分析,受岩相的控制作用三露天天然气水合物在空间上的分布有一定的选择性、延展性和可追索性,即其储层具有相对稳定性;三露天天然气水合物在储层内部的分布除了受有利储层产状变化限制外,还受到裂隙产状的控制,致使其在空间上分布既不规则、又往往突然消失或突然出现。
Based on the geological information derived from 14 gas hydrate drilling holes in Sanlutian of Mull, Qinghai, the basic features of gas hydrates' output, occurrence and spatial distribution are analyzed in this paper. According to the inner connection between inter-restriction and inter-stimulation of multivariate control factors, which is taken as a bridge, the gas hydrate reservoir is introduced as a study subject. From the aspects of reservoir analysis, it shows that the gas hydrate is controlled by lithofacies, which makes its spatial distribution appear to be selective, extensile and comparable to some extent, namely the relative stability of its reservoir appearance in Sanlutian. The gas hydrate distribution in the interior reservoir is also controlled by various occur- rence of fracture besides the various occurrence of the reservoir in Sanlutian, leading to irregular distribution in space and frequently sudden disappearance or sudden appearance of gas hydrate.
出处
《现代地质》
CAS
CSCD
北大核心
2015年第5期1035-1046,共12页
Geoscience
基金
青海省科学技术厅应用基础研究计划项目(2004-ZJ-780)
神华青海能源开发有限责任公司项目"青海省天峻县聚乎更煤矿区三露天天然气水合物调查评价"(SHQHNY201307001)
关键词
冻土区
天然气水合物
分布特征
青海木里三露天
permafrost area
natural gas hydrate
distribution characteristic
Sanlutian of Mull, Qinghai