特低渗油藏分段压裂水平井经济技术界限研究

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。

The study on economic and technical boundary values of multi-stage fractured horizontal well in ultra-low permeability reservoirs

In recent years, there are more and more multi-stage fractured horizontal well being applied in ultra-low permeability reservoirs, but not all reservoirs are suitable for this technology. So the establishment of limits of rational policy is particularly important. On the one hand, from the aspect of economic, based on the principle of input-output balance, the economic limits of single well cumulative oil production and initial production capacity were calculated; On the other hand, from the aspect of technology, the single well actual productivity was also calculated, using potential theory and principle of pressure drop superposition. The actual initial capacity is required greater than or equal to the economic limit of initial capacity. A series of policy limits were set, which based on different characterization indicators. Take Yan 227 ultra-low permeability reservoir as an example, a series of economic and technological line chart were built, which can provide guidance for actual production.