准噶尔盆地天然气勘探潜力及运聚规律

准噶尔盆地的天然气资源量大，探明率低，勘探潜力巨大。天然气运聚规律和特点表明，区域构造运动主控天然气运移，流体势决定天然气运移的方向和聚集场所，断裂和不整合面是天然气运移的主要通道，异常高压是天然气运移的主要动力，具有深盆气藏发育的地质特征和成藏条件。因此，斜坡带上倾方向和古隆起是天然气运移的指向区和有利聚集带，前陆逆冲推覆构造带是潜力巨大的油气富集带，盆地前缘带深层具有多个异常压力封存箱，具备形成深盆气藏的地质条件。这些地区将是天然气勘探的重要区带。

Exploration potential and migration-accumulation rules of natural gas in Junggar Basin

There is great gas exploration prospect in Junggar Basin，because of the high resource assessment and low exploration degree. Gas migration is controlled by regional tectonic movements. Migration direction and accumulation area are controlled by fluid potential. The faults and unconformity are the main migration pathway. Abnormal pressure is the main power of gas migration. All the geologic and accumulation characteristics accord with the features of deep basin gas. Thus，updip direction of slope and paleohigh are the migration direction and favorable accumulation area，and foreland thrust nappe structure is oil and gas-bearing belt with great potential. There are multiple abnormal pressure compartments in deep horizons of frontal zone of the basin. These areas have the geologic characteristics to form deep basin gas trap and will be the important gas exploration targets.