稠油油藏不同热采开发方式经济技术界限

结合数值模拟和动态经济评价,建立稠油油藏热采开发经济技术界限研究方法.以乐安油田南区为原型确定稠油油藏直井蒸汽吞吐、直井吞吐加密、水平井蒸汽吞吐以及直井蒸汽驱等不同热采开发方式下的有效厚度、原油黏度及油价边界值等经济技术界限,并制作实用图版.结果表明:水平井吞吐对油藏有效厚度和原油黏度的适应范围最广;直井蒸汽驱具有最高的采收率,有效厚度界限也比直井吞吐加密小很多.不同热采开发方式的经济技术界限对比结果有助于选择最佳的热采开发方式对稠油油藏进行经济合理的开发.

Economic and technical boundary values of different thermal recovery methods in heavy oil reservoir development

Based on the numerical simulation and dynamic economic evaluation, a method for studying economic and technical boundary values in the development of heavy oil reservoir by thermal recovery methods was built. Economic and technical boundary values of different thermal recovery methods including steam soak with vertical well, infill development in steam soak with vertical well, steam soak with horizontal well and steam flooding with vertical well in southern of Le' an Oilfield were studied, which include boundary values of effective thickness, oil viscosity and oil price. Meanwhile some practical plates were made. The results show that the steam soak with horizontal well could be used more extensively in the range of reservoir effective thickness and oil viscosity than the other three thermal recovery methods. While the stream flooding with vertical well has the highest oil recovery efficiency and a smaller effective thickness boundary value than that of the infill development in steam soak with vertical well. Based on the contrast results of economic and technical boundary values of different thermal recovery methods, the optimal thermal recovery method could be chosen easily for the heavy oil reservoir economic and reasonable development.