祁连山木里地区天然气水合物成藏模式分析  

Analysis on accumulation model of natural gas hydrate in Qilian mountain Muli area

作　　者：张金华[1,2] 魏伟[1,2] 魏兴华[1] 肖佳蕊 王培[1] 

机构地区：[1]中国石油勘探开发研究院廊坊分院,河北廊坊065007 [2]中国石油非常规油气重点实验室,河北廊坊065007

出　　处：《中国矿业》2014年第4期75-78,共4页China Mining Magazine

基　　金：中国石油天然气集团公司科技管理部"天然气水合物资源潜力分析及勘探评价技术研究"项目资助(编号:2011A-4806)

摘　　要：为了探讨我国中低纬度木里冻土区天然气水合物成藏模式,从天然气水合物成藏系统的角度,分别针对烃类生成体系、流体运移体系、成藏富集体系等要素对木里地区天然气水合物的成藏条件进行了分析,并结合已勘探发现的天然气水合物特征,对其成藏模式进行了研究。分析表明,木里地区具备形成天然气水合物的温度和压力条件,并且富含重烃等气体组分更有利于该地区天然气水合物的成藏。初步认为木里地区天然气水合物属于下部热解气在断层等构造通道作用下运移而形成的一种热解气-低温冷冻-地层型为主的动态成藏模式。最后,依据水合物成藏模式,提出了木里地区天然气水合物钻探有利区块评选方法。For the purpose of studying the accumulation model of natural gas hydrates in the Muli permafrost region with mid and low latitudes in China, this article based on natural gas hydrate accumulation system presents analysis on hydrate forming conditions in terms of the hydrocarbon generation system, fluid migration system, and accumulation enrichment system. The characteristics of the natural gas hydrate that has been found and explored are also involved when studying the accumulation model of this area. The results indicate that with favorable temperatures and pressure conditions for forming natural gas hydrate, this area, rich in heavy hydrocarbon, is likely to form gas hydrate reservoirs. Natural gas hydrate in Muli area is recognized as a dynamic accumulation model, which is formed by the thermal gas near the bottom and migrated under the effect of faults or some tectonics, and this model is thermal gas-low temperature-strata oriented. According to that model, some methods on how to select favorable drilling blocks in Muli area are presented in this article as well.

关 键 词：水合物 成藏系统 木里地区 成藏模式 

分 类 号：P618.130.2[天文地球—矿床学]