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Keywords: surfactant
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Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200346-MS
... imbibition into the matrix that promotes counter-current flow of oil into the fractures. In our research, this phenomenon was studied via carefully designed osmotic imbibition experiments that used low- salinity brines. Furthermore, adding a simple surfactant, or a wettability altering chemical, not only...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200315-MS
... Abstract In a surfactant-alternating-gas (SAG) injection, stable foams form viscous barriers and divert fluids, thereby providing conformance for enhanced oil recovery (EOR). Once foam decays, injected gas resumes preferential flow through thief zones, demonstrating the need for higher foam...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200383-MS
... Compatibility tests were performed to ensure that the surfactant remains stable under the test conditions. All the fluid formulations were prepared with 5 wt% KCl as the base brine. The stability of the surfactant was tested by preparing a 0.2 wt% surfactant solution in 5% brine and a 0.2% wt...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200417-MS
... The procedure for static adsorption was previously disclosed by Li ( Li et al. 2016 ). For dynamic adsorption, the natural cores were first cleaned and then saturated with injection brine under vacuum. After that, surfactant solution was injected at a temperature of 83 °C and an injection rate...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200327-MS
... and eight producers, selected due to signs of early gas breakthrough and poor overall sweep efficiency. To solve these conformance issues and increase overall pattern production performance, a new foaming surfactant with low adsorption and high gas partitioning characteristics was developed...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200347-MS
... Abstract Chemical Enhanced Oil Recovery (EOR) methods have been implemented in a West Texas fractured carbonate. Due to the partially oil-wet nature of Yates field and slightly viscous oil (5-7 cP), surfactant injection was implemented to alter wettability and polymer was injected...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200348-MS
... permeability. This study aims to enhance oil recovery from tight carbonates by virtue of wettability alteration using surfactants. Twenty different surfactants of different classes and different functional groups are systematically evaluated by first testing their aqueous stability at reservoir conditions...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200394-MS
... al ., 2014 ). Briefly, aqueous surfactant solutions and oil (or hydrocarbons) were combined in glass pipettes (bottom sealed 5 mL graduated borosilicate glass pipettes marked in 1/10 ml increments), mixed, and maintained at a given temperature. Phase volumes were observed over time until...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200345-MS
... methods and the DFN method. Explain and upscale the performance of surfactant spontaneous imbibition at the field scale. Model the performance of CO 2 huff n' puff at the field scale and determine the impact of various parameters. Another comparison is conducted on a model with less matrix...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200371-MS
... the carbon dioxide and water changes slightly because of the addition of the surfactant, but the bigger change occurs due to changes in the flow rate. Alterations in flow rate (or shear rate) in the pore space leads to changes in the foam texture, thereby also influencing the effective viscosity of the foam...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200423-MS
... to limited mobilization of the oil, and the polymer building up pressure due to the viscosity contrast between it and the resident brine. The measured surfactant retention was unexpectedly high compared to observed values in the Bentheimer flood. Abstract Large hydrophobe Carboxylate surfactants (MW...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200358-MS
... The mechanism of wettability alteration using non-ionic surfactants has been proposed to involve micellar solubilization of adsorbed hydrophobic material on the carbonate surface into the aqueous solution ( Jadhunandan et al., 1991 , Hirasaki et. al, 2004 , Abdallah et al, 2007 and Gupta et...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200470-MS
... Abstract Low recovery of fracturing water is partly due to fracturing fluid leak-off into formation and water trapping in matrix. In our previous studies ( Soleiman Asl et al. 2019 and Yuan et al. 2019 ), we showed that using surfactant solutions in fracturing fluid can significantly...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200435-MS
... upstream oil & gas np concentration silane coverage flow in porous media solution stability co 2 enhanced recovery concentration surfactant surface area stability chemical flooding methods fluid dynamics negative charge amine surfactant glymo silane coverage foam stability...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200455-MS
... encountered in oil-water separation processes are directly related to the risk of tight emulsions formation which may considerably complicate the water treatment surface processes. The objective of this paper is to underline the impact of EOR chemicals (surfactants) on the produced water cycle, when...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200431-MS
... Abstract The main objective of this research was to investigate the impact of initial water on the oil recovery from tight matrices through surfactant-enhanced water imbibition. Two flooding/soaking experiments using fractured tight cores with/without initial water were performed...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200432-MS
... Abstract A successful pilot in the Marmul field in the south of the Sultanate of Oman used a formulation consisting of 2% sodium carbonate, 0.3% surfactant, and 0.27% polymer. Marmul crude oil has a high total acid number (TAN = 0.9 mg KOH/ml). The petroleum acids are neutralized by alkali...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, August 31–September 4, 2020
Paper Number: SPE-200377-MS
... successful foam eor field pilot upstream oil & gas ocampo gas stream surfactant foam treatment enhanced recovery universidad nacional colombia restrepo fractured reservoir gas injection method field pilot operation foam technique society of petroleum engineers The northern gas...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, April 14–18, 2018
Paper Number: SPE-190232-MS
... Abstract Enhanced oil recovery (EOR) techniques involving surfactants such as surfactant floods, foam floods, and wettability alteration have been studied to recover remaining oil after primary and secondary floods. In these processes, a surfactant solution is injected to promote one...
Proceedings Papers

Paper presented at the SPE Improved Oil Recovery Conference, April 14–18, 2018
Paper Number: SPE-190168-MS
... sweep. Mobility control by CO 2 foam injection is therefore required to divert fluid flow from high permeable fractures into the less permeable matrix. Foam is ideal because it reduces the gas relative permeability when mixed with a foaming agent, i.e . a surfactant solution, creating a discontinuous...

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