摘要
基于系统动力学的基本原理 ,对烃源岩孔隙流体压力进行了模拟研究。结果表明 ,成熟烃源岩演化过程中存在着一个压力反馈控制系统。该系统包含两个次级系统 ,即压力增加次级反馈控制系统和压力降低次级反馈控制系统。前者是由压力与生烃组成的负反馈控制系统 ,在其作用下孔隙流体压力不断增加 ;后者是由压力与排烃组成的负反馈控制系统 ,在其作用下孔隙流体压力不断降低。在常规模拟方法的基础上 ,依据系统动力学的建模方法 ,建立了系统动力学模拟的新模型。该模型主要由水位方程、速率方程、辅助方程和初值方程这 4种方程组成 ,它们都是一些简单的线性方程。以新疆库车盆地为实例进行的模拟研究结果表明 ,该方法简单可行。
Based on the theory of system dynamics,the fluid pressure in pores of hydrocarbon source rocks was simulated.The results show that there is a pressure_feedback control system during the evolving process of matured source rocks.The control system consists of two subsystems,namely pressure increase subsystem and pressure decrease subsystem.The former is such a subsystem that encompasses mainly the processor of hydrocarbon generation and thus influences the pressure increase.The latter is mainly under the control of the processors of hydrocarbon expulsion and thus influences the pressure decrease accordingly.Based on the above analysis,a new model was constructed.This model consists mainly of four kinds of simple line equations such as water level equation,velocity equation,auxiliary equation and initial equation.A program was also designed on the new model and used to study the characteristics of porosity fluid pressure in the evolution of hydrocarbon source rocks in Kuqa rejuvenated foreland basin of the northwestern China.The simulation result indicates that the new method is very simple in operation.
出处
《石油学报》
EI
CAS
CSCD
北大核心
2003年第5期36-39,45,共5页
Acta Petrolei Sinica
基金
国家自然科学基金项目 (No .49832 0 4 0 )"塔里木与天山造山造盆耦合关系及大陆动力学"
中国海洋石油总公司"九五"重点攻关项目(No .961 8)"中国近海油气成藏动力学模拟系统研制"资助
关键词
烃源岩
流体压力
反馈控制
系统动力学
模拟方法
库车盆地
hydrocarbon source rock
fluid pressure
feedback control
system dynamics
simulation
Kuqa Basin
