低丰度油田水平井压裂效果及影响因素

The Effect of Horizontal Well Fracturing in Low Abundance Oilfields and Its Influential Factors

某油田为典型低丰度油藏,目前18口水平井实施压裂增油措施,压裂增产效果较好,但井间差异明显,部分井未能达到预期效果。为搞清影响压裂效果的因素,针对某油田18口水平井老井,采用压裂效果分类研究的方法,分析各因素对压裂效果的影响。结果表明:新增控制储量大、连通方向多、裂缝布局合理、地层能量充足的水平井通常有较好的压裂效果,这为下一步水平井措施治理和精细挖潜提供了依据,对实现水平井的二次高产有重要的意义。

In a certain oilfield,the reservoir was a typical low abundance reservoir,fracturing was carried out in 18 horizontal wells for stimulation of oil increment,the fracturing stimulation effect was good,but there existed obvious difference between wells,in some of the wells desired effect was not obtained.To find out the factors that influenced the fracturing effect and in consideration of the 18 old horizontal wells,the method of the fracturing effect classification research was used to analyze the influence of each factor on the fracturing effect.Results show that the horizontal wells have large and newly controlled reserves more connecting direction,rational layout of fractures,sufficient formation energy with better fracturing effect usually,it provides a basis for tapping the potential of horizontal wells in the next step and it of great significance for building secondary high yield in horizontal wells.