关键词: 二次加砂, 薄差层, 参数分析, 控制缝高

Abstract:

Fracture height control is a key factor for the development of low permeability reservoir, especially for the thin and poor quality zones. Aiming at the challenges of poor capping rock and ample muddy interbedding of formation of block Lu44 in Huabei Oilfield, secondary sanding fracturing technology are conducted as a way of stimulation. The secondary sanding fracturing technology can make a contribution to fracture height control has been proved by using the fracture height migration model. Through FracproPT software, the fracture height is compared between secondary sanding fracturing and conventional fracturing. At the same time, based on the result of numerical simulation, the reasonable fracturing parameters, including second sand volume, second preflush ratio, pump off time and delivery rate, are optimized. The secondary sanding fracturing has a good adptability in Huabei Oilfeild and better production in other wells.

Key words: Secondary sanding fracturing, Thin and poor quality zone, Reasonable fracturing parameters, Fracture height control