北港1-1HF井泥灰岩储层体积压裂技术

The SRV-Fracturing technique on muddy limestone of the Beigang1-1HF

北港1-1HF井目的层段是裂隙发育、含油饱和度较高、孔隙度和渗透率低的泥灰岩储层,需要大规模体积压裂形成网络裂缝。研究采用密切割体积压裂技术,优选滑溜水+低伤害胍胶体系,实现高效造缝携砂,采用多级粒径支撑剂有效充填,提高裂缝导流能力。施工用液16386m^(3),加砂277.3m^(3),最高产油量25t/d,为今后泥灰岩压裂施工起到一定的借鉴作用。

Beigang1-1HF is fracture-developed and oil-saturated but with low porosity and permeability in muddy limestone reservoir,which make it adaptable to SRV-fracturing.We decided to use high density dense cutting SRV fracturing technique and optimized slip water+low-damage guar gum to make high-efficiency fracture and carry sand.In order to promote the conductivity,we use a variety of particle size proppant to fill fractures effectively.The total fracturing fluid volume is 16386m^(3),and proppant 277.3m^(3).The highest oil production was 25t/d,which provided a good reference for the future stimulation of muddy limestone reservoir.