超稠油油藏蒸汽吞吐参数优选及合理开发界限的确定

应用物理模拟与数值模拟方法研究了超稠油的流体组成、粘温关系和油藏渗流特征 ,分析了超稠油蒸汽吞吐注汽工艺参数对开采效果的影响。在考虑经济效益的前提下 ,建立了蒸汽吞吐开采目标优化函数 ,提出开发超稠油油藏的合理工作制度和技术经济界限。研究结果表明 ,在实施超稠油蒸汽吞吐作业时 ,采取注高温、高干度、高强度的蒸汽和短周期、多周次的工作制度 ,同时在完井方式和注采工艺等方面采取配套措施 ,才能取得较好的经济效益。研究结果为该类油藏的热采开发提供了可靠的依据。

Optimization of steam soaking parameters and determination of feasible developing limit for heavy oil reservoir

The physical and numerical simulation methods were adopted to study the fluid composition, the viscosity temperature and seepage characteristics of reservoirs. The influencing parameters of steam soaking technology on the reservoir development are analyzed. With consideration of economic efficiency, a method for optimizing the targets of steam soaking is presented, and a feasible working system and a technologic and economical limit for reservoir's exploitation are programmed. A good benefit would be gained in the implement of steam soaking by injecting steam with high temperature, high dryness and high intensity, and by adopting a working system of short cycle and more times in steam soaking. A series of well completion and steam injection technologic measures should be taken.