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长庆油田三叠系油藏为典型的砂岩岩性油藏,油层厚度较小,长期以来,压裂改造以实现长缝为目标,并且由于油层厚度小通常需要配合采用控缝高工艺,以保证缝长并在储层内形成有效支撑。随着勘探开发的深入钻遇厚度大的油层,对于该类储层,在适用范围内可以采用多级加砂压裂工艺。多级加砂压裂是以控制裂缝纵向延伸、增加裂缝长度、提高裂缝导流能力为目的,对低渗厚油层有较好的增产效果。
The Triassic reservoir in Changqing Oilfield is a typical sandstone lithologic reservoir with a small reservoir thickness. For a long time, the goal of long-term fracturing has been achieved by fracturing. Due to the small reservoir thickness, Guarantee the length of the seam and form an effective support in the reservoir. With the deep exploration and development of thick oil reservoirs, for such reservoirs, multi-stage sand fracturing can be applied within the applicable scope. Multi-stage sand fracturing is aimed at controlling the longitudinal extension of fractures, increasing the length of fractures and improving the conductivity of fractures, which has a good stimulation effect on low permeability thick reservoirs.