温度场与压力场动态耦合下的沉积盆地热史模拟

Geothermal History Simulation of Sediment Basins Under Dynamic Coupling on the Pressure and Temperature Field

盆地热史模拟是盆地模拟的重要组成部分 ,也是实现盆地整体模拟的基础。温度和压力是烃类形成的两个主要控制因素 ,在沉积盆地中温度场与压力场之间存在着复杂的相互制约机制。本文就从油气成藏动力学和盆地流体动力学的角度对盆地热流体运移下的温度场与压力场动态耦合关系进行了探讨 ,并建立了耦合下的温度控制方程。该方程不仅可以运用于沉积盆地热史模拟 ,推进盆地模拟技术的发展 ;还可以运用于金属成矿动力模拟 。

Geothermal history simulation of sediment basins is an important segment and the base of basins simulation. Temperature and pressure are two major control factors of hydrocarbon generation. The relation between pressure field and temperature field is very complicated in sediment basins. But the current geothermal history model and their formula almost regard them as two absolutely independent factors, so the result of simulation always exists errors and directly influence its facticity. In this paper, the authors discuss the dynamic coupling relations between them on the condition of basin fluid migration from dynamics of petroleum accumulation and dynamics of basin fluid, and bring forward temperature control equation of sediment basins under their coupling equation. The control equation could be used in geothermal history simulation of sediment basins and promotes the development of basin simulation technology. It can also be used in metal mineralization dynamical simulation, and increases the precision of mineralization forecast.