摘要
生物气是天然气的一个大类,具有气体非常干、C同位素轻的地球化学特征.其主要成因类型有3种:①高纬度低温,永久冻土带下形成生物气;②高海拔、高盐度环境下形成生物气;③现代沉积物形成浅层生物气.商业规模的生物气存在于具有高沉积速率、低地温梯度的沉积盆地中和非常规环境下形成的页岩、煤层或致密砂岩中.准噶尔盆地目前虽然尚未发现确凿的生物气藏,但已有种种迹象表明有生物气存在的可能.
Biogas is a braid type of natural gas, which characterized by very dry and light carbon isotope. There are three main genetic types: (1)Biogas generated in high-latitude and low-temperature permafrost zone; (2)Biogas generated in high salinity environment in high elevation;(3)Biogas in shallow pay generated in recent sediment. Biogas in commercial size existed in sedimentary basin which has high deposition velocity and low geothermal gradient and shale, coalbed or compacted sandstone in unconventional environments. Currently, although definite biogas reservoirs have not been discovered in Junggar basin, every indication shows that there possibly exists biogas in Junggar basin.
出处
《新疆地质》
CAS
CSCD
2003年第4期450-454,共5页
Xinjiang Geology
