... pressure. The results show that after one cycle of hydrocarbon gas HnP, approximately 57% of the original oil-in-place is recovered. We observe that solution-gas drive and gas vaporization during the depletion stage are the main oil-recovery mechanisms. The presence of fractures along the depositional...

... Abstract Wellbore natural fracture systems characterization is a key element to achieve the successful exploitation of tight reservoirs, where one of the dominant aspects is permeability. Carbonate reservoir fracture evaluation is challenging in terms of type, density, aperture, and extension...

... is improved diagnostic methods to identify and quantify PDP and enable better stimulation of such coals. History-matching diagnostic fracture injection testing (DFIT) after-closure data with reservoir simulators can derive best-fit values for fracture compressibility and aid stimulation designs. The second...

... sequential steps to finally have an estimate of cluster efficiency for each hydraulic fracturing stage. First, raw stimulation data acquired from field operations is filtered out to capture a representative zone of interest. Second, key input parameters such as the instantaneous shut-in pressure (ISIP...

... Abstract Efficient optimization of unconventional field development necessitates understanding and prediction of the hydraulic fracturing process. Conventional models fall short in capturing dynamic fluid and rock behavior, hindering the optimization of completion designs. Analytical models...

... medium consisted of two types that are simple trapping mechanism designs (converging-diverging channel and pore doublet) and sample rock-like designs (sandstone and fractured sandstone). The experimental results confirmed that ferrofluid is an effective enhanced oil recovery agent for both the wetting...

... reservoirs characterized by complex, non-uniform fractures, and multi-phase fluid dynamics. These complexities deviate from the diagnostic behavior seen in planar fractures and single-phase flow. To predict well performance under varying pressures and operational conditions, the Hybrid SNR model combines...

... Abstract Unconventional reservoirs typically decline rapidly, with wells producing 40-50% less in their second year of production, compared to their first. Therefore, it is critical to take measures to ensure maximizing the first year's production. Hydraulic fractures should propagate...

... Abstract Butterfly modeling is a technique used in Fractional Dimension Rate Transient Analysis (FD-RTA) that reduces a system with multiple fractures to an equivalent system with a single fracture. With this approach, numerical simulations run in seconds, enabling the automatic calibration...

... Abstract A potential solution to mitigate greenhouse gas emissions during hydrocarbon recovery is to employ cyclic CO 2 injection or ‘huff-n-puff (HnP) in multi-fractured horizontal wells completed in unconventional reservoirs. This serves to simultaneously reduce CO 2 emissions and increase...

... Abstract Hydraulic stimulation design requires careful consideration of fracture height and the potential parent-child well interference. To unravel the key factors influencing the vertical growth of hydraulic fractures and parent-child well interference during hydraulic stimulation, we...

... temperature and pressure, deep shales demonstrate compressive strength up to 478 MPa, with peak strain exceeding 1.5%, indicating hindered fracture initiation and expansion. (d) Compared with siliceous shale, carbonate-bearing siliceous shale and argillaceous siliceous shale are easier to crack under high...

... Abstract Rate-transient analysis (RTA) has been widely applied to extract reservoir/hydraulic fracture properties with simplifying assumptions (e.g., reservoir/well conditions, fluid/rock properties and fracture geometry). However, the current RTA methods could lead to misdiagnosis of flow...

... the stress change induced by the production of offset wells with multi-stage fractures in shale reservoirs. Our approach is based on Fourier transform with the assumption of homogeneous and transversely isotropic reservoirs. The developed model converts a given pressure field to the Fourier domain using...

..., a possible hazard is the creation of fractures that could lead to compromising formation integrity. To optimize injection pressure, operators perform leak-off test using a water-based fluid which has considerably different properties from CO 2 . Thus, the rock geomechanical response (breakdown pressure (P b...

... subdiscipline vector npv gradient fracture table unconventional resource technology conference iteration 1 URTeC: 4037410 Production Optimization of CO2 Huff-n-Puff Process in Unconventional Oil Reservoirs with Effects of Gas Relative Permeability Hysteresis, Geomechanics, and Capillary Pressure...

... Abstract Shale and tight formations are characterized by extraordinarily low permeability (micro- to nano-Darcy) and existence of natural fractures at various scales. Horizontal drilling with multi-stage hydraulic fracturing has enabled commercial oil and gas production from those...

... a reduction of permeability with distance from the well. FD-RTA creates a variation of area perpendicular to flow with distance from fractures by using variable fracture spacing in a well model. Production and pressure data are used to create diagnostic plots that represent the response of a well to constant...

... Abstract Multi-stage hydraulic fracturing operations are widely used in long horizontal wells to enhance production in deep shale gas reservoirs in Sichuan Basin. During the stimulation process, casing deformation often occurs. One of the main mechanisms of casing deformation is shear slip...

... Abstract A case study in the Uinta Basin integrated multiple diagnostic measurements to understand the interaction between mechanical stratigraphy, fracture geometry and effective drainage for horizontal wells landed within different benches. In the center of a planned development cube...