濮城油田双重介质油藏裂缝水淹分析及对策

Watered analysis and countermeasures in the fracture of double porosity oil reservoir in Pucheng oilfield.

濮城油田沙三段中亚段油藏为微裂缝-孔隙双重介质油藏,水力压裂产生的人工裂缝与原始裂缝连通形成水道。处在裂缝方向的油井极易暴性水淹,从而大大降低最终采收率。通过油藏压裂效果分析,及时进行了以重组注采井网为中心的开发调整,油藏水驱控制程度提高了12.3％,动用程度提高了8.5％,综合递减率下降28.5％,日增产原油110t。

The middle Es3 oil reservoirs in Pucheng oilfield are the microfracture-double porosity ones. Water channel is formed due to man-made cracks produced by hydraulic fracturing and original cracks. The oil wells in the direction of the cracks are easy to watered out, which may largely reduce the ultimate recovery efficiency. Through analysis of fracturing effect, development adjustment centered around flood pattern reforming is done in time with the result of raising 12.3% and 8.5% of the waterflood control degree and producing degree respectively, reducing 28. 5% of the composite decline rate, and increasing 110t of daily oil production.