低渗油藏水井压裂增注优化研究

为了改善低渗油藏注水井吸水状况,提高低渗油藏水驱开发效果,利用裂缝-油藏耦合技术建立油、水两相三维油藏裂缝数值模拟器,利用此模拟器模拟研究了不同条件下水井压裂对注采井组开发效果的影响,并利用正交方差分析方法对水井压裂增注效果的主要影响因素进行了显著性评价.以胜利油田史深100低渗透断块油藏为例,提出综合效果评价参数,对实际油藏注水井压裂参数设计进行了优化.研究结果为低渗透油藏注水井压裂设计和增注效果评价提供了一种研究手段,对于提高低渗透油田注水效果具有实际意义.

Fracturing parameter optimization of the water wells in low-permeability reservoirs

To improve the water-flooding development result of low-permeability reservoirs and the water absorbing condition of water-wells,a numerical simulator for the 3D simulation of the oil-water phase reservoir fractures is established by means of reservoir-fracture coupling technology.It is used for the study on the effects of water-well fracturing on the development result of injection-production well group under different conditions.The significances of the factors of influencing the development result!are evaluated using orthogon variance analysis.Shishen 100 low-permeability fault block reservoir in Shengli Oilfield being taken an example,the parameters for evaluating the development result are presented,and the fracturing parameters of the water injection wells in the reservoir are optimized.The study results can provide a research means for the fracturing design and the injection-increasing result evaluation of the water injection wells in low-permeability reservoir.