超低渗油藏水平井网参数优化

Parameter Optimization of Horizontal Well Pattern in Ultra-Low Permeability Reservoir

华庆油田元284区块属于超低渗透油藏,具有储层的物性较差,非达西渗流特征明显,存在启动压力梯度等特点;使得油井见水后含水上升速度加快,单井产能较低等问题。为了解决上述问题,对该油藏的水平井的井网参数进行优化。采用油藏数值模拟方法,对研究区的五点水平井网参数进行优化,确定合理的水平井参数,合理井距为400 m,排距为140 m,合理水平段长度为400 m。

Block Yuan 284 in Huaqing Oilfield is an ultra-low permeability reservoir with poor physical properties, obvious non-Darcy seepage characteristics, and a starting pressure gradient. As a result, the water rise rate of the oil well after seeing water is accelerated, and the production capacity of a single well is low. In order to solve the above problems, the well pattern parameters of the horizontal wells in the reservoir are optimized. Using the reservoir numerical simulation method, the five-point horizontal well pattern parameters in the study area are optimized, and the reasonable horizontal well parameters are determined. The reasonable well spacing is 400 m, the row spacing is 140 m, and the reasonable horizontal section length is 400 m.