A comprehensive assessment of advancements and challenges in hydraulic fracturing development of tight reservoirs from the perspectives of fracture propagation, proppant transport behaviors, fracture conductivities, and productivity models for fractured wells is essential.
FREMONT, CA: There are advances and challenges in developing tight reservoirs from hydraulic fracturing propagation. The technology of hydraulic fracturing obtains scarce resources, and Hydraulic fracturing involves rock failures, complicated fracture development, proppant movement and fracture closure. All of these habits impair broken well productivity. Most fractured horizontal well productivity models construct using the reservoir fluid's initial saturation and pressure distribution. Fractures created by hydraulic fracturing in constrained reservoirs are typically complex.
Current fracture propagation modeling approaches provide limited propagation channels and cannot accurately represent the intricacy of fracture propagation. Proppant migration and distribution focus primarily on indoor experimental studies of proppant migration in a single or branched fracture and simulation studies of proppant migration and dispersion in a small-scale single slab fracture. Insufficient methods for calculating complicated fracture conductivity account for the influence of proppant placement and distribution in fractures, fracture surface roughness and dissolution, diffusion, deposition, elastic embedding, and stress-induced creep.
Without stimulation technology, most tight oil wells would not be commercially feasible. The Darcy flow law works well for typical reservoirs and is no longer valid for fluids moving through rocks with low porosity and permeability. In other words, the fluid flow in tight reservoirs differs from that in conventional reservoirs, with fluid flow in tight reservoirs having a threshold pressure gradient. In the meantime, the tight reservoir was stress-sensitive, meaning that reservoir permeability varied in response to variations in effective stress. The hydraulic fracturing technique stimulated confined reservoirs to increase wells' productivity.
Hydraulic fracturing is a technique used to create fractures in rock formations that extend from a borehole and get maintained by proppants. The procedure is fracking or hydro-frac and is employed to boost the recovery of formations, particularly those with tight reservoirs. Numerous processes are involved in hydraulic fracturings, such as rock collapse, production, proppant transport, and fracture closure. All of these mechanisms affect fractured good performance.
