摘要
气液液三相平衡计算在油气藏开发中有着重要的实用意义。与气液两相平衡计算相比 ,气液液三相平衡计算技术还很不成熟 ,其主要难点在于稳定性分析和如何确定平衡常数初值。针对气液液三相平衡计算中存在的上述难点 ,文章提出了一种新的解决方法 ,并从理论上证明了该方法的可靠性。该方法通过对系统进行两次两相平衡计算 ,得到气液液三相平衡计算的平衡常数初值 ,从而解决了三相平衡计算中的稳定性分析和平衡常数初值问题 ,算例表明文章提出的方法是可靠的。文章还采用该方法计算了大港千米桥凝析气藏流体凝析水含水率 ,从理论上区分了千米桥凝析气藏产出水的来源问题 。
The three-phases (gas, liquid and liquid) equilibrium calculation has important signification in the development of oil and gas reservoirs. Comparing to the tow-phases (gas and liquid) equilibrium calculation, the three-phases (gas, liquid and liquid) equilibrium calculation is immature. The main problems are stability analysis and how to determine the initial value of equilibrium constant. Aiming to the problems, the article suggests a new resolution, and proves its reliability theoretically. The initial value of equilibrium constant for the three-phases (gas, liquid and liquid) equilibrium calculation is obtained by calculating the two-phases equilibrium twice. So, it solves the problems of the stability analysis and the initial value of equilibrium calculation for the three-phases (gas, liquid and liquid) equilibrium calculation. The calculated cases in the article indicate the resolution is reliable. Applying the resolution, the condensate water cut of the gas-condensate reservoir of Dagang Qianmiqiao Oil Field is calculated. So, the source of the produced water in Qianmiqiao Gas-Condensate Reservoir is demonstrated theoretically. The results are satisfactory.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2003年第5期83-86,共4页
Natural Gas Industry
