Adoption of a Process to Prevent Souring Associated with Seawater Waterflooding in the Ursa-Princess Fields, Deepwater Gulf of Mexico

McElhiney, J.E.; Burger, E.D.; Maxwell, Stephen; Davis, Roy A.; Walsh, John

doi:10.2118/113317-ms

Cited by 14 publications

(2 citation statements)

References 14 publications

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“…Stoichiometric calculations indicate that approximately 100 ppm of sulfate in the injection water could produce approximately 35.4 ppm of H 2 S in the presence of SRB. Walsh et al found that seawater treated with sulfate rejection membranes (SRMs) contains approximately 40 mg/L of sulfate, which could yield 14.2 mg/L of sulfide. However, this calculation may exaggerate the problem because most of the current offshore waterfloods did not show even trace levels of H 2 S in produced fluids.…”

Section: Advanced Water Problemsmentioning

confidence: 99%

Review of Recovery Mechanisms of Ionically Modified Waterflood in Carbonate Reservoirs

Thyne²,

2016

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Advanced waterflooding is a process in which the ionic strength as well as the ionic composition of the injected water is tuned to improve the oil recovery. It has been observed in field trials and in lab coreflooding experiments; advanced waterflooding has the potential to recover additional oil. This process has been evaluated as a wettability-modifying agent in carbonates and captured the global research focus in water-based enhanced oil recovery (EOR) methods. This paper provides a comprehensive review of the published research to speed the process of further investigations in this field. The review provides the most current information to the reader about advanced waterflooding and a guide to the relevant papers for those who are new in this field.

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Section: Advanced Water Problemsmentioning

confidence: 99%

Review of Recovery Mechanisms of Ionically Modified Waterflood in Carbonate Reservoirs

Thyne²,

2016

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“…3. There are approximately 50 seawater sulfate-removal NF desalination units on offshore oil platforms currently either operating or in the design phase, with a total estimated capacity of approximately 600 000 m 3 /d (Walsh et al 2008). These fields include Brae, Heidrun, and Girassol in the North Sea.…”

Section: Novel Water-ionic-optimization Technology For Smart Waterflomentioning

confidence: 99%

Optimization Study of a Novel Water-Ionic Technology for Smart-Waterflooding Application in Carbonate Reservoirs

Yousef

Ayirala

2014

Oil and Gas Facilities

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Injection water with selective ionic content and composition is a key requirement for smart-waterflooding (SWF) application in carbonate reservoirs. Smart water-depleted in monovalent ions, but enriched in sulfates and divalent cations-is desired for incremental oil recovery in carbonates, which constitute complex water chemistry when compared with sandstones. Most of the published work available in this area is focused on addressing water-chemistry requirements for low-salinity waterflooding in sandstones. However, none of these studies describes the complex injection-water requirements of SWF in carbonate reservoirs. Also, injection-water chemistry has a known impact on several tertiary enhanced-oilrecovery (EOR) processes among the three major categories of chemical, gas, and thermal EOR. The main purpose of this study is, therefore, to identify and optimize a novel water-ionic technology that can serve as a "one-shop solution" to generate desired water chemistries suited for different improved-oil-recovery (IOR)/EOR processes, including SWF in carbonates. A novel water-ionic technology, comprising nanofiltration and reverse-osmosis membrane-based processes, was identified for optimization in this study. The proposed technology makes use of these two membrane-desalination processes in parallel configuration to provide multiple water streams of widely varying ionic strength and content. Different water streams obtained from this novel solution can be blended effectively to yield a smart-water cocktail of desired ionic strength, composition, and monovalent-to divalent-ion content suited for carbonates. Smart-water cocktails obtained from the proposed solution are also suited for application in other EOR processes such as polymer flooding, alkaline/surfactant/polymer flooding, low-salinity surfactant flooding, dilute surfactant flooding, carbonated waterflooding, and miscible gasflooding, and are suited for boiler feedwater in steamflooding. The optimized scheme thereby offers a novel oneshop solution to meet the complete suite of desired water-chemistry requirements for different IOR/EOR processes. In addition, comparative evaluation-study results between novel water-ionic technology and other already-known advanced-desalination schemes highlight the major advantages of the new solution in terms of better water-ion-tuning flexibility, higher recovery efficiency, lower energy requirement/footprint, and ease of operation.

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Simulation of Hydrogen Sulfide Generation in Oil and Gas Geological Formations

Hagar¹,

Forooezsh²,

Zivar³

et al. 2020

2020 International Conference on Computational Intelligence (ICCI)

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Adoption of a Process to Prevent Souring Associated with Seawater Waterflooding in the Ursa-Princess Fields, Deepwater Gulf of Mexico

Cited by 14 publications

References 14 publications

Review of Recovery Mechanisms of Ionically Modified Waterflood in Carbonate Reservoirs

Review of Recovery Mechanisms of Ionically Modified Waterflood in Carbonate Reservoirs

Optimization Study of a Novel Water-Ionic Technology for Smart-Waterflooding Application in Carbonate Reservoirs

Simulation of Hydrogen Sulfide Generation in Oil and Gas Geological Formations

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