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Keywords: reservoir
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Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, June 28–29, 2023
Paper Number: SPE-213789-MS
... compatibility, which limited the applications at harsh reservoir conditions. An improved nanosheet system synergetic with a cationic surfactant was developed and showed good compatibility improvement at 95°C and salinity as high as 57,670 mg/L. The interfacial tension (IFT) of the developed nanosheet...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, June 28–29, 2023
Paper Number: SPE-213872-MS
... Table 1 Summary of reservoir properties Producing formation Upper Carrizo Formation top ~600′ Formation thickness ~35′ Average porosity 37% Average permeability 1500 mD Formation temperature 80 °F Oil viscosity ~1000 cP API gravity 19° Formation water...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, June 28–29, 2023
Paper Number: SPE-213865-MS
... Reservoir temperature=65°C Moderate heavy oil, viscosity=90.54cP at 65°C Porosity=21% Average permeability=182mD Water cut=99% Pay zone thickness=4m The high-permeability zone and macropore, formed by long-time water flooding, located in the bottom of the reservoir...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, June 28–29, 2023
Paper Number: SPE-213828-MS
... The field crude oil used in this test had a known wax content (Wax Appearance Temperature < 40°C) and trace asphaltene content. Some key properties of the crude oil are shown in Table 2 . Table 2 Field crude oil properties. Test core material The reservoir rock...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, June 28–29, 2023
Paper Number: SPE-213852-MS
... Abstract Hydraulic fracturing of shale in unconventional oil & gas recovery is accomplished through the addition of large volumes of water and biodegradable additives to reservoirs, creating environments conducive for microbial contamination. Contamination of reservoirs by sulfate reducing...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, June 28–29, 2023
Paper Number: SPE-213798-MS
... rates of injection produced high shearing rates that may cause collapse of foam. The study suggested useful outcomes for addressing supercritical CO 2 foam instability in sandstone reservoirs and advancing understanding in the developing area of foam behavior research. sedimentary rock united...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, December 6–7, 2021
Paper Number: SPE-204324-MS
...) high salinity (>2.1×10 5 mg/L) channel reservoir of block X in Tahe oilfield. This paper reports the experimental results and pilot test for the combined flooding in a well group of Block X. In the experiment part, the interfacial tension, emulsifying capacity of the surfactant and the particle...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, December 6–7, 2021
Paper Number: SPE-204291-MS
... ability gradually returns to the level of the injected fracturing fluid. It can be confirmed that DME can migrate within the tight rock, make the rock surface more water-wet and enhance the imbibition capacity of the fracturing fluid, to reduce the reservoir pressure decline rate and increase production...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, December 6–7, 2021
Paper Number: SPE-204294-MS
... the pores, which reduces the permeability in a reservoir; thus, decreasing the oil recovery and increasing the production costs. This research investigates the nitrogen (N 2 ) miscible and immiscible pressure injections on asphaltene instability in shale pore structures. First, a slim-tube was used...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, December 6–7, 2021
Paper Number: SPE-204352-MS
... Brazilian pre-salt carbonate reservoirs are offshore oil reservoirs located 300 km from shore. Development and production of such reservoirs are performed under difficult conditions, with water depths exceeding 2 km, and a heterogeneous reactive carbonate reservoir beneath a salt layer with domes...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193534-MS
... under harsh reservoir conditions. Herein, a new type of guerbet alkoxy betaine surfactant (GAB) was prepared and evaluated for SP flooding. In order to boost the emulsification capability of betaine surfactant, ethylene oxide (EO) functional group was incorporated into betaine molecule and guerbet...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193568-MS
... challenges at producers are further complicated by chemical changes as the fluids propagate through the reservoir such as reaction with reservoir formation minerals, chemical retention, chemical degradation and hydrolysis, etc. More importantly the implications for the production system and processing...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193569-MS
... Abstract Acid stimulation in sandstone reservoirs containing significant amount of clays can end up with undesired results due to unexpected reactions between stimulation fluids and formation clays. This paper demonstrates how heavily damaged clay-rich sandstone reservoir completed with cased...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193553-MS
... counter-current imbibition condition. This preliminary study would provide some knowledge about how to optimize the selection of chemicals for improving oil recovery from tight reservoirs. chemical flooding methods imbibition rate enhanced recovery concentration Upstream Oil & Gas...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193583-MS
... with the presence and/or development of H 2 S in reservoirs containing carbonates: higher H 2 S concentration reflects in higher calcium carbonate scaling potential. The intention of this work is to demonstrate the impact of H 2 S using a real field case scenario and investigate how the variability in water cut...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193570-MS
... Abstract Geochemical scale formation and deposition in reservoir is a common problem in upstream oil and gas industry, which results in equipment corrosion, wellbore plugging, and production decline. In unconventional reservoirs, the negative effect of scale formation becomes more pronounced...
Proceedings Papers

Paper presented at the SPE International Conference on Oilfield Chemistry, April 8–9, 2019
Paper Number: SPE-193631-MS
... Abstract Preformed Particle Gel (PPG) is an appropriate solution for conformance control and managing water production in low permeable reservoirs. Rheological behavior evaluation of these deformable particles is a key factor in designing composition to achieve the best conformance control...

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