复杂断块油藏不规则井网整体压裂优化设计

建立了低渗透复杂断块油藏复杂地应力条件下的不规则井网优化模型,以驱油面积和采出程度为目标函数,考虑了任意裂缝方位与井网的匹配关系.在运用油藏数值模拟方法确定了压裂井作用椭圆边界,采用Matlab编程求解,得到了数学问题的2个最优解.在此基础上,应用大型油藏数模软件Eclipse建立实际油藏模型.以最高采出程度、采油速度为目标,优选出最佳井网方案.该模型应用于中原油田某井区的井网调整,取得了较好的生产效果.

Optimization design of integral hydraulic fracturing for skewed patterns in low-permeability complex faulted reservoir

The optimization model for skewed patterns in low-permeability complex faulted reservoir under the condition of complicated field stress was established. The sweep area and oil recovery were taken as the target functions of the model, and the matching relationship between orientation of arbitrary fractures and well patterns were considered in the model. The ellipse boundary of a fractured well was determined by the numerical simulation method. The model was solved with the Matlab programming, and two optimal solutions of mathematical problem were obtained. A real reservoir model was built up by Eclipse reservoir simulation software. This model was used to adjust well patterns in Zhongyuan Oilfield, and the preferable production effectiveness were achieved. This model is also suitable for other complex faulted reservoirs.