Research on Horizontal Well Hydraulic Fracture Crack Initiation Law of Low Permeability Reservoir

Abstract

Horizontal well hydraulic fracture construction technology has already become the main development means of low permeability reservoir, and the crack initiation pressure is a key factor in fracture construction. Taking ABAQUS as the platform, combined with rock mechanics, elastic mechanics, fracture mechanics, damage mechanics and fluid-solid coupling theory, to establish horizontal well mechanical model, crack initiation law of horizontal well under different conditions were obtained by using finite element method. According to the horizontal well fracture tested data in Daqing peripheral oil fields, the crack initiation pressure and numerical simulation results are in good agreement, it shows that the numerical simulation method is reasonable, then analyze influence factor of crack initiation pressure on the basis.

Analysis and Application of Multi-Stage Fracture Stimulation in Yanchang Oilfield

“…For instance, Jin Zhang with his group has studied the multi-fracture interaction in horizontal wells and applied it to fracturing [6] . Bojun Wang and his colleagues have studied the multi-fracture interaction in deviated wells, finding that the interaction effect can influence the fracture extension [7] . In this paper, a mathematical model of multi-stage fracture stimulation will be given and applied to the Yanchang Oilfield through using the field data there.…”