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近年来分段压裂水平井在特低渗油藏开发中的应用越来越多,政策界限研究是实现经济有效开发的基础。综合考虑经济和技术两个方面,建立了经济技术界限确定方法。基于盈亏平衡原理,得到了经济极限初期产能及累产油量;同时从技术角度出发,基于位势理论和压降叠加原理,得到了单井实际初期产能。由实际初期产能与经济极限初期产能关系,得到了储层可动用对应的渗透率和有效厚度界限。以东辛油田盐227特低渗油藏为例,得到了一系列经济技术界限图版,为储层可动用性评价提供依据。
In recent years, the application of fractured horizontal wells in the development of ultra-low permeability reservoirs has been more and more. The study of policy boundaries is the basis for the economical and effective development. Comprehensive consideration of both economic and technical aspects, the establishment of a method of determining the boundaries of economic and technological. Based on the breakeven principle, the initial production capacity and accumulated oil yield of the economic limit were obtained. From the technical point of view, the initial initial capacity of the single well was obtained based on the potential theory and the pressure drop superposition principle. From the relationship between the actual initial production capacity and the initial economic capacity, the corresponding permeability and effective thickness limit of the reservoir can be obtained. A case study of Salt 227 ultra-low permeability reservoir in Dongxin Oilfield shows a series of maps of economic and technological boundaries, providing the basis for reservoir usability assessment.