龙门山造山带-川西前陆盆地系统的成山成盆成藏动力学

造山带动力学、沉积盆地动力学和油气藏动力学均是地球科学的研究前沿。作者分析了三种动力学的主要研究内容和发展趋势，认为：(1)大陆动力学作用过程决定了造山带动力学和沉积盆地动力学的作用过程；(2)造山带动力学和沉积盆地动力学性质决定了油气藏动力学的作用机制。龙门山造山带-川西前陆盆地系统是由从东向西的深部多级俯冲潜滑而引起的浅部由西向东的多层次推覆而形成的，并且其物质流和能量流的循环均有两个传递系统。高异常古压是上三叠统天然气运移的动力，是控制天然气运聚与区域分布的主要因素，并且古压的演化直接控制了局部构造的成藏。川西前陆盆地侏罗系天然气藏是上三叠统与侏罗系之间流体的跨层流动形成的。龙门山造山带-川西前陆盆地系统形成和演化产生的挤压环境和使川西前陆盆地的被动沉降作用控制了天然气初次运移和聚集的成藏作用。60Ma以来，龙门山造山带-川西前陆盆地系统的整体抬升和剥蚀作用决定了裂缝系统的发育和上三叠统气藏的调整及侏罗系气藏的形成。

A STUDY ON THE DYNAMICS OF MOUNTAIN-BUILDING, BASIN-FORMATION AND NATURAL GAS POOL FORMATION IN THE SYSTEM OF LONGMEN MOUNTAINS AND WEST SICHUAN FORELAND BASIN, CHINA

Mountain-building dynamics, sedimentary basin dynamics and petroleum pool formation (dynamics) are the research hot points in Earth sciences. The present paper points out the main research (contents) and their tendencies of the dynamics mentioned above. The continental dynamics controls the (formation) processes of mountain-building dynamics and sedimentary basin formation dynamics, and the latter two dynamics affect the formation mechanism of petroleum pool formation dynamics. The system of Longmen Mountains and West Sichuan Foreland Basin was formed by the deep-seated multi-grade (subduction) and underplating from east to west and the shallow multi-layer detachment from west to east. There aretwo circulation systems of material and energy in the formation of Longmen Mountains and West Sichuan Foreland Basin. The abnormal pressure was the dynamic force of the migration of Upper Triassic natural gas and the chief factor controlling the gas accumulation and regional distribution. The cross-(formation) movement of the fluids between Upper Triassic Series and Jurassic Series formed the Jurassic gas reservoirs. The compression environment and the passive subsidence resulted from the formation and (evolution) of the system of Longmen Mountains and West Sichuan Foreland Basin have controlled the (dynamics) of gas pool formation.