... degradation through multiple coreflooding experiments. Pre-shearing the polymer by 40% and subsequently filtering it through 3, 1.2, 0.8, and 0.45 µm filter membranes improved its injectivity. With this filtration process, the polymer successfully propagated through a core plug of 63 mD in the absence of oil...

... experiment seawater waterflooding imbibition wettability alteration particle journal petroleum science engineering plug Introduction The growing global demand for energy and the depletion of conventional oil reserves have intensified the search for advanced oil recovery techniques aimed...

... permeability impairment completion installation and operations pvt measurement fluid dynamics experiment plug core sample Introduction Many researchers have indicated the occurrence of asphaltene deposition in wellbores upon production of tertiary oil. Nagel et al. (1990) and Beliveau...

... plug collected from the Montney tight- oil Formation, under reservoir conditions ( P = 137.9 bar and T = 50°C). We used a custom-designed visualization cell to experimentally evaluate mechanisms controlling (i) gas transport into the plug during injection and soaking phases, and (ii) oil recovery...

... and apply a comprehensive laboratory protocol on a tight core plug to simulate leak-off and flowback processes under reservoir pressure, with and without initial water saturation (S wi ). We evaluate the possibility of pore-throat blockage by comparing pore-throat size distribution of the core plug and size...

..., a novel coreless injectivity method was developed and validated. The method utilizes field-produced drill cuttings to make synthetic core plugs, which are universally available during well drilling and commonly considered as waste. A specially designed cleaning process was performed for the drill cuttings...

... focus on unconventional plays. This study is a laboratory investigation of gas flooding to recover light crude oil from nano-permeable shale reservoirs. In this work, the N2 flooding process was applied to Eagle Ford core plugs saturated with dead oil. To investigate the effects of flooding time...

... Abstract A laboratory study on core plugs from a carbonate field confirmed the efficacy of an alkaline surfactant (AS) formulation at reservoir conditions. Continuous monitoring of remaining oil saturation (ROS) in short core plugs using spatially resolved nuclear magnetic resonance (NMR) can...

... of the overall performance of this effort. enhanced recovery waterflooding MBE cement drilling operation injector lateral cement placement Symposium producer slotted liner Drillstem Testing Upstream Oil & Gas isolation completion plug Directional Drilling drillstem/well testing...

... of spontaneous imbibition experiments on Berea outcrop core plugs, and some reservoir rock core plugs, that were designed to determine the impact of formation water, imbibing water and crude oil composition on wettability and on wettability modification by LSF. The data presented in this paper lead us...

... core plug at two different temperatures; room temperature and 55°C. Plugs with different water saturations were used; S w =100%, S orw (20-30%) and S wi (14%). The fracture was created by transferring plugs with different diameters into cylinders with an annulus space around the plugs. The fracture...

... The digital core methodology is based on a state-of-art micro-CT facility capable of acquiring 3D images of up to 2000 cubed voxels on core plugs and rock fragments at resolutions down to 2 microns ( Sakellariou et al ., 2004 ). To date over 100 core plugs have been imaged. After imaging phase...

... permeabilities ranging from 25 mD to 28D. Polymer and breaker concentrations in the fracturing fluid were identical to those used in the field. Core plugs were tested by both methods: injecting and circulating the fracturing gel, and soaking it under pressure for up to seven days. Tests were performed...

... was conducted in the lab (using ceramic disks, core plugs) and in the field. Chemical analysis for core effluent and well flowback samples after various treatments was conducted. These tests included: Anthrone method for carbohydrates, and full analysis of the produced solids using acid solubility, XRD, and SEM...

... with asphaltene deposition related ESP failures and tubing plugging. Operational procedures, field experience and a successful chemical program have greatly reduced the cost of these problems over the last 3 years. A new inhibitor for continuous capillary injection has been recently developed and used...

..., and the stability of surface tension were used as screening criteria. Spontaneous imbibition tests at ambient and reservoir temperatures were conducted using reservoir chalk plugs that were moderately water-wet. A selected surfactant, when added at low concentrations (100 to 500 parts per million of active...

... and tested. The method involves: (i) setting two chemical wellbore plugs in the horizontal section to straddle the problem zone, (ii) squeezing gel into the problem zone, and (iii) cleaning out the borehole prior to production. Using coiled tubing, the whole operation would be conducted in one roundtrip...

... reductions (> 90%) than conditions supporting formation of loose, colloidal gels. Batch-wise addition of nutrients (< 5 pore volumes) to ceramic cores inoculated with L. mesenteroides resulted in production of stable in-depth plugs whereas, continuous injection of nutrients was required to achieve...

... Abstract Water shut-off treatments (WSOT) are routinely performed on wells in the carbonate formation, in one of Saudi Aramco's oil fields that are dead, have high water cut, or low-flowing wellhead pressure. WSOT using through-tubing bridge plugs (TTBT) in both open-hole and cased-hole...

... Abstract A new technique for zone isolation in horizontal wells has been developed and tested in the laboratory. The technique consists of three sequential stages: setting a chemical wellbore plug upstream of the problem zone, spotting and squeezing a gel into the problem zone...