... the swelling before reaching the intended site of action during coreflood experiments. The rheological behavior of the hydrogel features rubber-like mechanical behavior with a viscosity value of 1.17 cp, which displayed water-like characteristics. Further, significant permeability reduction of large fractures...

...M. Qi; E. Yang; Y. Liu; C. Dong; X. Chen Summary The Fuyu oil field is a typical shallow, low-temperature, low-permeability reservoir. At present, the oilfield composite water cut is 95%, artificial fractures interlace with natural fractures, and the distribution of ineffective circulation channels...

... impairments observed on the analyzed wells. Analyzed samples showed the presence of kaolinite that may affect the formation permeability by filling porosity and pore throats (diagenetic effect). Moreover, in case of interaction with fluids, kaolinite can lead to an additional permeability reduction...

... inflow control valve shows its largest potential to reduce unwanted fluids and increase oil recovery when used in segmented reservoirs. In cases with uncertain aquifer and/or gas cap strength, or large variation in effective permeability, the valve will make an infill well more robust as it autonomously...

... for economical production. Therefore, the management of the damage caused by effective permeability loss in this type of reservoir becomes essential to productivity maintenance. This paper proposes a new unsteady-state poroelastic solution for the nonlinear hydraulic diffusivity equation (NHDE) in Biot’s...

.... To bridge this gap, this paper aims to present a semianalytical model of the off-center multiwing fractured well. With consideration of permeability stress sensitivity, the reservoir model and hydraulic fracture model are established, respectively. The coupling approach of the reservoir model and hydraulic...

... relationship caused by the occurrence of the scale, after Rodrigues et al. (2007) . ( b ) Phases of the scale formation process, after Chauhan et al. (2015) . From the above, both the occurrence of scale and the decrease in oil permeability occur with the arrival of water in the producer and both...

... for the NS-based fluid system was recorded as less than 5 cp at a 10 s –1 shear rate, whereas after gelation, the viscosity was increased to more than 500 cp at a 10 s –1 shear rate. Using coreflooding tests, N 2 gas permeability of the Berea sandstone core was completely plugged after pumping the five times...

... in synthetic brine containing a salt concentration of 200 000 mg/L representative of harsh field conditions in the laboratory evaluation. Coreflood tests were conducted under reservoir conditions to evaluate flowback efficiency quantified by regained permeability. To test the ability of the surfactants...

... formations, the sandstone intervals represent extensive reservoir intervals of sand separated by laterally extensive nonreservoir intervals that comprise finer-grained argillaceous sands, silts, and muds. The reservoir is shallow with high permeability (above 1,000 md) and under bottom aquifer pressure...

.... Fig. 1 Physical models of vertical wells in an NFR. (2) 3.6 K f μ ∂ 2 p f ∂ l 2 = ϕ f C t ∂ p f ∂ t , where K f , p f , and ϕ f are the fracture permeability, pressure, and porosity...

...Kelvin Abaa; John Wang; Derek Elsworth; Mku Ityokumbul Summary Fracturing fluid filtrate that leaks off during injection is imbibed by strong capillary forces present in low-permeability sandstones and may severely reduce the effective gas permeability during cleanup and post-fracture production...

... shale plug outlet pressure dual pressure control room temperature experimental setup upstream oil & gas borehole assembly alloy plug kpa experiment interface mpa february 2022 wellbore integrity spe production cavity permeability wellbore design For abandonment...

..., including acid-injection rate and volume. Previous studies have suggested that saturation conditions, permeability, heterogeneity, temperature, and pressure can significantly affect the design of matrix-acidizing treatments. However, laboratory studies’ results are inconsistent in their conclusions...

...- or overestimate well productivity, with mean absolute percentage error (MAPE) values of less than 8%. Sensitivity analysis indicated that, with the increase of fracture width, fracture half-length, and matrix permeability, the productivity of channel-fractured wells increases disproportionately. In addition, well...

... capillary pressure, ultralow permeability of tight or shale rocks, and pressure-supercharge effect ( Abbasi et al. 2014 ; Ezulike et al. 2016 ). Negligible mobility of initial hydrocarbon (low oil and gas saturation, S o i and S g i ) in the fracture and negligible...

...Tamaralayefa A. Timiyan; Boyun Guo Summary Fracture packing is a well-known completion technique used in the hydraulic fracturing of low-permeability reservoirs. As much as fracture packs are very effective, the proppant-pack permeability damage formed from particle intrusion reduces...

... production monitoring reservoir surveillance screen selection drilling fluid formulation pinhole curve ct scan filter cake technical conference oh-sa completion spe production & operation permeability pinhole model spe production sand/solids control int august 2021 screen overlap...

... properties to guarantee high permeability in the resultant propped fracture. However, engineering the surface properties of proppants, such as tuning their wettability, has not received considerable attention. Considering that water-wet proppants can not only limit production because of reduced hydrocarbon...

...Alireza R. Safari; Hamed Panjalizadeh; Maysam Pournik; Hamed Jafari; Alireza Zangeneh Summary The accomplishment of matrix stimulation in highly contrasted permeability reservoirs is critically dependent on diversion. Consequently, assessment of the diversion performance is a key to determine...