油页岩原位注蒸汽开发的固-流-热-化学耦合数学模型研究

The solid-fluid-thermal-chemistry coupling mathematical model for oil shale in-situ steam injecting development

针对目前传统地面干馏油页岩技术中存在的高成本、高污染问题,提出了对油页岩进行原位注蒸汽开发的新方法.并利用太原理工大学研制的高温高压干馏釜对油页岩进行了高温高压蒸汽作用下油页岩干馏渗透实验.结果表明:高温高压蒸汽作用下油页岩会产生大量的孔隙、裂隙,从根本上提高了油页岩的渗透性;主要利用对流传热的方式,高效率地加热了油页岩并带走页岩油.同时,在复杂理论分析的基础上建立了油页岩原位注蒸汽开发过程中的固、流、热、化学耦合数学模型,包含了众多的耦合项作用,为分析解决油页岩原位注蒸汽开发过程中的复杂物理化学过程提供了理论依据.

A new oil shale in-situ steam injecting development technology is presented to overcome the difficulty of the high cost and serious pollution in traditional oil shale development technology of surface oil shale dry-distillation.The dry-distillation seepage experiment of oil shale at high-temperature and high-pressure is carried out using the reactor designed by Taiyuan University of Technology.It is shown that:under the action of high-temperature and high-pressure vapor,a lot of pores and fractures are produced in the oil shale to improve the permeability of it,which mainly utilizes the heat convection to heat the oil shale and carry it away.At the same time,based on the complex theoretical analysis,the solid-fluid-thermal-chemistry coupling mathematical model for oil shale in-situ steam injecting development is established,which provides a theoretical foundation for the analysis of the complex physical-chemical process in the oil shale in-situ steam injection.