... and waterflooding experiments in shale oil samples at constant and gradually increasing injection pressure while monitoring the spatial distribution of movable and residual oil by means of nuclear magnetic resonance (NMR) technology. Before the injection experiments, we performed mercury intrusion tests...

...Zuhao Kou; Heng Wang; Vladimir Alvarado; Charles Nye; Davin A. Bagdonas; J. Fred McLaughlin; Scott Austin Quillinan Summary Carbon dioxide (CO 2 ) injection into a deep saline aquifer can dissolve into formation brine and generate carbonic acid. The resulting acid can drive fluid-rock geochemical...

... Copyright © 2023 Society of Petroleum Engineers united states government upstream oil & gas fluid dynamics waterflooding carbonate reservoir asia government chemical flooding methods pw 16 mineral dissolution flow in porous media surfactant wettability alteration injection coreflood...

... with a multiscale pore system ( Zheng 2014 ; Shi et al. 2021b ; Bandyopadhyay et al. 2020 ), as shown in Fig. 1. When fluids are withdrawn or injected from the reservoir (CBM/shale gas production or CO 2 or H 2 storage), the equilibrated pressure distribution is disrupted and mechanical interactions occur...

... ratio (SR), fracture size, and fiber concentration on gel injection pressure, water breakthrough pressure, and permeability reduction. Results show that fiber can increase RPPG strength and delay its initial swelling rate, but an optimized fiber concentration exists. Beyond that, the fiber entangling...

... solution that has resulted in attractive and predictable return on investment. In recent times, a challenging economic environment has operators looking for added economic and sustainable savings. The possibility of reinjection of produced (sheared) polymer to offset injection concentration requirements...

... Engineers reservoir enhanced recovery producer equation steam-assisted gravity drainage canada government permeability saturation upstream oil & gas modeling & simulation interface numerical simulation bitumen viscosity injection sagd thermal method butler permeability...

...Zihao Li; D. Nicolas Espinoza; Matthew T. Balhoff Summary Polymer flooding is an enhanced oil recovery (EOR) method which improves the mobility ratio and sweep efficiency of a waterflood. In theory, the high viscosity of the polymer reduces its injectivity compared to water. However, field studies...

... released. Then, the released fibers bridged in the fractures while reducing the safety risk of the injection process. As a water plugging agent, the fiber balls can decrease the conductivity in high-permeability fractures and increase the conductivity in low-permeability fractures, thus improving...

...S. L. Chen; Y. H. Han; Y. N. Abousleiman Summary This paper develops a set of engineering charts for the time-dependent stress and pore pressure responses at the wellbore surface under ramp-type, finite-length fluid-injection conditions, based on a semianalytical approach with the use of Laplace...

... in produced water for near real-time analysis. We systematically evaluated the novel tracer molecules at 95°C in high-salinity injection brine over 4 months, with periodic sampling and analysis by liquid chromatography to ascertain their hydrothermal stability. Coreflood tests at reservoir conditions were...

...Irina Zahirovic; Dušan Danilovic; Milica Šuput Vranjin; Miloš Tripkovic Summary One of the most common methods used to reduce excessive water production is water shutoff operations. These types of operations include injection of gel for flow profile modification. The most widely used gels...

... have come to another conclusion if we had not used capillary pressure in fine-grid simulation as approximately one-third of the benefit of low-salinity waterflooding was attributable to more favorable capillary pressure under low-salinity injection. We demonstrate how a set of high-salinity relative...

... data. The experiments were conducted in unconfined transparent cubic blocks with a dimension of 8 in. on each side. The block was made of transparent epoxy to visualize the fracture propagation. Fiber-optic sensing cables were embedded in the block at different distances to the source of injection. We...

.... 3 1 2022 13 4 2022 11 4 2022 10 5 2022 20 12 2022 Copyright © 2022 Society of Petroleum Engineers enhanced recovery flow in porous media waterflooding spe journal injection well connectivity production monitoring asset and portfolio management reservoir...

... geometries. For example, Jin and Roy (2017) identified fracture-hit location and timing from LF-DAS data and evaluated fracture azimuth. From the constructed map of the fracture connections, Ugueto et al. (2019) showed the parallel planar fracture geometry from four different injection wells monitored...

... location ( Souza et al. 2005 ). In essence, the calculation of production potential uses empirical formula, and it is still necessary to constantly adjust and calculate injection and production well locations when determining the well placement scheme, which may fall into the local optimal solution...

...Kjetil E. Haavik Summary Distributed acoustic sensing (DAS) is used to monitor production and injection wells in real time. Here we present theory, data examples, and interpretation of low-frequency (LF)-DAS data acquired on fiber-optic (FO) cables clamped to the production tubing. We show...

... to conventional expectations, polymer retention does not delay the initial polymer arrival at the end of a Milne Point core. However, after effluent polymer concentrations rapidly rise to at least 50% of the injected value, the concentration gradually “tails” up over many pore volumes (PVs) before it finally...

... oil. We reasoned that fracture reduces the treatment gas’ sweeping efficiency. This issue can be partially mitigated by injecting N 2 instead of CO 2 ; N 2 can enter rock’s pores more efficiently as a treatment agent. Nevertheless, N 2 HnP still suffers a noticeable reduction in the total recovery...