... development scco 2 urtec complex reservoir rock type flow in porous media chemical flooding methods pore imbibition geology mudrock shale gas efficiency enhanced recovery climate change wettability water-wet pore pore wettability immersion experiment sweeping efficiency saturation...

... of imbibition rate, diffusion coefficient, pore connectivity and distribution were achieved from samples of drill cuttings and core plug across different rock units of Niobrara formation. The research consists of three methodologies which include laboratory experiments of pore structure characterization, gas...

... resonance experiments. By conducting imbibition and nuclear magnetic resonance experiments on saturated cores, the imbibition degree of the oil phase is analyzed under varying imbibition time and porosity for different pore throat radii. A model for oil phase saturation distribution is developed considering...

... diffusivity through the cement matrix, a novel approach based on Nuclear Magnetic Resonance (NMR) is employed. Deuterium oxide (D 2 O) imbibition to replace H 2 O in cement plugs is monitored over time to derive tortuosity. Comparing pre- and post-CO 2 exposure D 2 O intrusion profiles allows us to determine...

... to this author s knowledge. Thirdly, imbibition, the spontaneous uptake of water, is the response to intrinsic, pervasive electrostatic imbalance within pore systems with partial oil saturations when reservoir conditions change. Exposing a reservoir with partial oil saturations and saline capillary film water...

... imbibition is the main mechanism by which fracture fluid enters the rock. Herein we study the spontaneous imbibition of brine to determine the flow mechanism and uptake capability of fracturing fluid in unconventional source rocks. We used NMR spectroscopy and imaging methods to track the spatial...

... Abstract Water imbibition and associated oil displacement is an important process in shale oil reservoirs after hydraulic fracturing and in water-based enhanced oil recovery. Current techniques for water imbibition measurement are mostly "black-box" type of methods. More explicit understanding...

... was doped with D2O, and another with toluene (Fig. 1(b NMR was again utilized to capture the time-lapse profile of the doping concentrations. D2O-doped and toluene-doped responses provided tortuosity of the water and the oil phases, respectively. URTeC 5118 Figure 1a. Workflow for single phase imbibition...

...URTeC: 5299 Water-Oil Displacement in Shale: New Insights from a Comparative Study Integrating Imbibition Tests and Multiscale Imaging Sheng Peng*1, Priyanka Periwal1, Robert M. Reed1 1. Bureau of Economic Geology, The University of Texas at Austin Copyright 2021, Unconventional Resources...

... Abstract Techniques such as horizontal drilling and hydraulic fracturing have helped in exploitation of unconventional shale reservoirs. However, a drawback of hydraulic fracturing is that it results in forced imbibition of frac-water into the pore system of the organic shale matrix. This can...

... Abstract A large amount of fracturing fluid in fracking is imbibed into the shale fracture/matrix system, which leads to a significant uncertainty in gas recovery evaluation. The mechanism of imbibition impact on the gas–water two-phase flow is not well understood. In this study, systematic...

... Spontaneous imbibition of hydraulic fracturing fluids is considered as one of the underlying causes of water loss during multistage fracturing operations. Understanding the mechanisms behind matrix imbibition rate is crucial in planning fracturing operations and optimizing production from shale...

... Abstract Water imbibition is an important process influencing early oil production after hydraulic fracturing of shale reservoirs. A major fraction of the injected fracturing fluid remains in the formation; however, where the unrecovered fracturing fluid resides and how it displaces the oil...

...-displacing-water and water-displacing-oil imbibition to provide a new diagnostic SCAL method: robust and non-destructive time-lapse wettability measurements for tight rocks. This work shows wettability results from two prolific North American UR plays and covers several key unconventional rock types...

... Abstract Determination of dynamic fluid intrusion in tight oil reservoirs requires a very careful and precise estimation of changes in fluid volumes during spontaneous and forced imbibition. Because of the extremely low permeability of these mudrocks, only very small volumes of fluid can flow...

... to reduce uncertainty in reservoir simulation through determination of wettability of unconventional rocks with nanoDarcy permeabilities. Laboratory measurements of water spontaneous imbibition were made on oil-bearing unconventional core samples from the Permian Basin with nanoDarcy permeability. A Nuclear...

... will present a systematic investigation of gas-water relative permeability and hysteresis using a laboratory measurement technique developed through our previous work. A procedure of drainage and imbibition is adopted. After each step of drainage or imbibition, gas relative permeability was measured using...

..., a new method to evaluate wettability in different pore-scale was provided. Then core flooding experiments were conducted to study invasion pressure for the LNF. Finally, the efficiency of drag reduction after adding the LNF was evaluated. The result showed that imbibition and nuclear magnetic resonance...

... concentration tight oil reservoir crude oil oleic phase Upstream Oil & Gas contact angle atmospheric pressure wettability alteration enhanced recovery experiment imbibition imbibition experiment reservoir viscosity aqueous phase alvarez spontaneous imbibition oil recovery...

... and fluid systems by changing the interfacial tension which results in releasing hydrocarbons from the rock. In this study, enzyme solutions with concentrations of 10 and 5 wt.% are used on 6 different cores. Recovery factors of the spontaneous imbibition tests at this concentration were 11 and 22...