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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 lower limit of economic exploitation is an important consideration for decision making in marginal reservoir development. The effective thickness and permeability of the pay zone are the two most important stratigraphic elements that affect the production dynamics of the reservoir and the economic benefits of the development process. The concept of lower limit of economic exploitation of oil reservoir is proposed, that is, the effective thickness and permeability lower limit of formation corresponding to payback period 6a. The methods to determine the lower limit of economic exploitation of marginal oil reservoir are studied (including establishment of basic parameter system, dynamic of reservoir development Forecast, economic analysis of the development process, the lower limit of the value, etc.). Based on the development of hydraulic fracturing technology, it is introduced into the oilfield development process. The actual data are used to investigate the influence of hydraulic fracturing on the economic exploitation limit of the reservoir. The analysis and discussion are made. The results show that hydraulic fracturing can increase the economic benefits of reservoir development and make some of the reservoirs that did not have the economic development conditions become the economically available resources at present. The results of the study will help to further integrate the economic feasibility of marginal reservoir development with existing process technologies. Figure 4 Table 1 Reference 3 (Wang Fengjiang pick)