水力压裂对边际油藏经济开采下限的影响

经济开采下限是边际油藏开发决策的一个重要考虑依据。产层的有效厚度和渗透率是影响油藏开采生产动态和开发过程经济效益的两个最重要的地层性质要素。提出了油藏经济开采下限的概念 ,即与投资回收期 6a相对应的地层有效厚度和渗透率下限 ,研究了确定边际油藏经济开采下限的方法 (包括基础参数系统的建立、油藏开发动态预测、开发过程的经济分析、下限值的求取等 )。基于水力压裂技术的发展 ,将其引入油田开发过程 ,以实际数据考察了水力压裂对油藏经济开采下限的影响 ,并进行了分析讨论。结果表明 ,水力压裂可以提高油藏开发的经济效益 ,使原来不具备经济开发条件的部分油藏成为现时的经济可利用资源。研究结果将有助于将边际油藏开发的经济可行性评价与现有工艺技术进一步结合起来。图 4表 1参 3(王凤江摘 )

The effect of hydraulic fracturing on the economic recovery limit for marginal reservoirs.

Economic recovery limit is an important factor to be taken into a account in the decision making of marginal reservoir development. Pay zone thickness and permeability are the two dominant in situ reservoir factors influencing its recovery performance and development economics. In this paper, the concept of economic recovery limit is termed, and the method for determining the limit is developed. Such aspects as construction of basic data system, forecast of reservoir performance, economic analysis of reservoir development, and determination of limit values are involved in the comprehensive methodology. The effect of hydraulic fracturing is investigated according to the realistic field data, indicating that more reserve can become commercially recoverable by means of reservoir stimulation. This study will help enhance the combination of evaluation of recovery feasibility of marginal reservoirs and the current fracturing technology.