断裂输导在我国高效和中效聚集的大-中型气田形成中的作用

基于对我国53个大.中型气田生储盖组合类型及天然气运移输导类型的研究，认为生储盖组合类型决定了断裂是我国大一中型气田天然气运移的主要输导通道.通过这53个大，中型气田天然气聚集效率与其输导通道之间关系的剖析，发现被断裂输导的大一中型气田主要为高效和中效聚集的气田.这主要是由于断裂本身具有较强的输导能力，同时其输导时期与源岩大量排气期匹配关系好.利用断裂输导天然气的输导能力综合评价参数对我国44个大-中型气田断裂输导天然气能力进行了研究，提出我国要形成高效和中效聚集的大-中型气田的条件是：断裂输导天然气速度一般应大于0.47×10^-12m/s.

Influence of fault transporting pathways for formation of large-medium gas fields with high/middle accumulation efficiency in China

Based on the study of combination types of generation, reservoir and caprock and types of transporting pathway of gas migration of 53 large-medium gas fields in China, it was thought that the combination types of generation, reservoir and caprock decided faults being main migration transporting pathways of gas migration.By the study of relation between gas accumulation efficiencys and transporting pathways of these large-medium gas, it was discovered that the largemedium gas fields transported by faults were ones with high or middle gas accumulation efficiency.It resulted from the faults having a strong transporting ability,and there being a good matching relation between transporting period of faults and the main period of gas discharging from source rocks.By comprehensive evaluation parameter of gas transporting ability,the abilities of faults in about 44 large-medium gas fields in China were studied.The results showed that the minimum transporting gas velocity of faults was,generally,more than 0.47×10¹² m/s for creation of large-medium gas fields with high or middle gas accumulation efficiency.