..., Rivero et al. 2019 ). Among the EOR techniques, adding chemical additives such as surfactants and microemulsions to the fracturing fluid has been considered as a practical way for displacing the oil from tight rocks. This method has been the focus of many studies ( Sheng 2018 , Yarveicy et al. 2018...

... models to evaluate the feasibility of reused water in shale plays development. The outcomes show that recycling water with high TDS in a high-temperature environment can create a fracture network and proppant transport when high viscosity friction reducers with surfactant (HVFR-PRS) was used. In addition...

... Abstract Due to the mixed-wettability phenomenon found in Montney rock fabric, choosing the ideal flowback enhancer/surfactant to Enhance Post Frac Oil Recovery (EPFOR), has not been a straightforward task. Along with the wettability ambiguity, Montney exhibits nano-Darcy permeability making...

... with soaking tests suggests that adding surfactant to the soaking fluid may alter the wettability of organic pores towards more water-wetness, leading to the displacement of oil from hydrophobic organic pores. complex reservoir pore Reservoir Characterization IFT experiment Upstream Oil & Gas...

... indices. Cores saturated and aged with formation brine or surfactant solutions were first injected with Bakken crude oil (i.e., drainage process). Then the fluids in the cores were displaced by brine or surfactant solutions to obtain the imbibition capillary pressure curve. Multi-speed measurements were...

..., surfactant injection has shown good potential in the laboratory due to its capability to alter wettability, lower interfacial tension (IFT), and reduce residual oil saturation. However, successful implementation of surfactant EOR requires in-depth characterization of the rock-fluid system at multiple scales...

..., their ability to transport proppant over the whole zone has been critical when the horizontal wellbore is near the bottom of the fracture interval. Use of Surfactants Careful selection of a surfactant in reservoirs having very low permeability and/or subnormal reservoir pressure is essential with aqueous...

... Abstract Surfactants are typically added into fracturing fluids to assist flowback and/or enhance oil and gas production from liquids-rich shale formations. Two primary benefits that can be overlooked are the potential capability of surfactants to initiate microcracks near primary fractures...

... of four different antisludge surfactant packages. Initial interpretation indicates that the acid blends containing cationic surfactants yield significantly higher oil production than the acid blends that utilize anionic surfactants once other variables have been normalized. Acid blends containing anionic...

.... To address these challenges an optimally-spaced well to well surfactant flooding technology is proposed. Optimal well spacing, from a flooding perspective, can mitigate rapid breakthrough while minimizing the distance through the matrix that the injection fluid must travel. An optimally designed chemical...

...Phase behavior Test Fluids. Cores were saturated with Bakken crude oil from Well #16083, B.L. Davidson 2-11H, 155-96-1102-2. The API gravity was 43.2°API, and oil density 0.82 g/cm 3 at 23.2°C. Brine water salinity was characteristic of the Bakken Formation. Surfactants: Aqueous...

... imbibition experiments were conducted using actual shale core samples collected from Fort Simpson, Muskwa and Otter Park formations, all belong to the Horn River shale basin. This study provides additional experimental data on how imbibition rate depends on type and concentration of salts, surfactants...

... reservoirs, such as ultralow-permeability or tight-gas sands. When fracturing, the damage mechanism must be mitigated to help prevent fracture face damage. By reducing fracture face damage caused by the use of conventional surfactants, which absorb rapidly within the first few inches and result in fluid...

... pressures and help minimize near-wellbore (NWB) tortuosity effects in many shale and sandstone reservoirs. hydraulic fracturing precipitation acid surfactant corrosion inhibitor stimulation treatment carbonate wellbore spe 162238 upstream oil & gas completion cloud point fracture...

... Abstract There is a new chemical improved oil recovery (IOR) process for Bakken reservoirs. In this concept a custom surfactant agent may be incorporated into standard hydraulic fracturing treatments for the Bakken to increase oil recovery. These are reservoirs from the Late Devonian to Early...

... production was determined on a mass basis by centrifugally separating produced. Results and discussion Interfacial tension measurements The effects of NaOH, Na 2 CO 3 , and surfactant on the interfacial tension of Pelican Lake oil with injection water were determined. The data are depicted...

... Abstract This study presents the results of nano-particle and surfactant-stabilized solvent-based emulsion bench test studies under laboratory conditions that investigate the recovery mechanisms of chemical flooding in a heavy oil reservoir. In the study, bench tests, including the phase...

... reservoirs and in depleted zones. One advantage of a high-quality foam is its reduced environmental impact by using very small quantities of water as compared to high-rate slickwater stimulations. In these particular high-quality foams, a viscoelastic surfactant gel is used in the liquid phase as the gelling...

..., or a combination of a friction reducer and a novel chemical to reduce inversion time. friction reducer produced water discharge upstream oil & gas surge tank cold water reducer concentration friction reducer loading friction reducer effectiveness heating surfactant csug spe 138027...

... cores at low capillary numbers (Nc). Wettability alteration was measured using contact angle and imbibition tests. These tests together with x-ray photoelectron spectroscopy (XPS) analysis were used to screen the selected surfactants. Since this durable enhancement is achieved by treating a small area...