姬塬油田黄220区长81^1储层特征及水平井开发效果评价

Reservoir characteristics and horizontal well development effect evaluation of Chang 81^1 in Huang 220 block of Jiyuan Oilfield

姬塬油田黄220区长81油藏位于鄂尔多斯盆地天环坳陷中-西部,油藏砂体呈条带状,连续性好厚度较大,但储层物性差,属于超低渗Ⅲ类油藏。2018年开始采用细分切割短水平段五点法注水井网开发,完钻43口,储层改造方式采用水力喷射环空加砂体积压裂和泵送桥塞环空加砂体积压裂,改造并投产18口井,实现了整体规模动用。

the chang81 Reservoir in Huang220 area of Jiyuan Oilfield is located in the middle west of Tianhuan sag.The sand body of the reservoir is banded with good continuity and great thickness,but the physical property of the reservoir is poor.It belongs to ultra-low permeability Ⅲ reservoir,since 2018 we start using waterflooding well pattern with five point method of subdividing and short-cutting horizontal section to develop,Up to now 43 wells were drilled.The reservoir reconstruction was carried out in two ways:hydraulic jet annular sand volume fracturing and pumping bridge plug annular sand volume fracturing.18 wells were transformed and put into operation,realizing the overall scale of production.