外围油田覆膜砂控水压裂技术适应性探讨

针对葡萄花储层开发中后期中高含水井,常规措施压裂后经常出现大幅度增液,而增油幅度较小甚至不增油,即便压裂后达到了预期增油效果,其含水上升速度也较快,有效期难于控制。结合大庆油田外围地层裂缝走向、渗透率、油层发育等情况以及井层压前产液、含水等状况,开展了现场试验,通过压裂工艺将覆膜砂携至裂缝中,生产时形成一条高含油饱和带,实现覆膜砂对油水流动能力的选择,达到具有堵水不堵油特性。通过近几年效果跟踪统计,分析其增油降水的效果及适应性,该技术可有效提高油井压裂后油层动用程度,降低油井采出液的含水率,拓宽压裂选井选层范围。

Peripheral Oilfields Coated Sand Fracturing Technology Adaptability of Water Control

Putaohua reservoir development in the middle and late high water cut wells after fracturing,conventional measures often appear substantially liquid increasing,and increasing oil less or even oil problems,even after fracturing has achieved the expected effect of increasing oil,the water cut rising fast,effective period is difficult to control.In this paper,combined with the periphery of Daqing oil field,permeability,formation fracture to the reservoir development such as well before the lamination of produced fluid,such as water,carried out the field test,the fracturing process will be coated sand carrying to crack,production forms a high oil saturation zone,realization of coated sand on oil and water flow capacity choice,achieve have plugging water and not plugging oil characteristics,in recent years through the effect of tracking statistics,summary analysed the oil increasing precipitation effect and adaptability.The technology can effectively improve after fracturing of oil reservoir producing degree,reduce the oil well produced fluid moisture content,widen the fracturing well and layer selection range.