应用物质点法实现非常规油气藏水平井压前模拟——以鄂尔多斯盆地杭锦旗区块为例

Pre-pressure simulation of horizontal wells in conventional oil and gas reservoirs with material point method——by taking Hangjinqi Block in Ordos Basin as an example

水平井多级压裂为非常规油气藏的主要开采方式,钻前确定人工压裂改造范围,对优选水平井方位、压裂段划分方案及井距选择具有重要意义。文中应用物质点方法模拟人工裂缝与天然裂缝的交互作用,确定人工压裂改造范围与微地震事件分布范围一致,并优选了裂缝发育区及不发育区的水平段方位和平均段长。研究结果表明,应用物质点方法可有效预测水力压裂的人工改造范围,优选水平段方位及压裂段划分,促进非常规油气藏的高效开发。

Multi-stage fracturing of horizontal wells is the main production method for unconventional reservoirs.It’s important to determine the scope of artificial fracturing transformation for optimizing the orientation,fracturing section division plan and well spacing selection before drilling.The material point method was used to simulate the interaction between artificial fractures and natural fractures.The scope of artificial fracturing was determined,which was consistent with the distribution range of micro-seismic events,and the horizontal orientation and average length of the developed and undeveloped fracture zones were optimized.The results show that the application of material point method can effectively predict the artificial reconstruction range of hydraulic fracturing,optimize the horizontal orientation and completion plan,and promote the efficient development of unconventional reservoirs.