The Troll Story

Mikkelsen, J.K.; Norheim, Thorstein; Sagatun, Svein I.

doi:10.4043/17108-ms

Cited by 18 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is the first type of FCD used to equalize production on a horizontal producer (Al-Khelaiwi and Davies 2007; Henriksen et al 2006;Mikkelsen et al 2005) as well as the first geometry used in a SAGD production well (Stalder 2013). Common geometries include helical channels wrapped around a base pipe and labyrinth pathways.…”

Section: Channel-style Flow Control Devicesmentioning

confidence: 99%

“…The first downhole field application of FCDs for the recovery of hydrocarbon is credited to Norsk Hydro and Baker Hughes in the early 1990s (Al-Khelaiwi and Davies 2007;Bybee 2008;Mikkelsen et al 2005). In this first industrial trial, flow control devices were applied to horizontal wells in the Troll field, a subsea giant gas field found on the Norwegian shelf of the North Sea.…”

Section: Introductionmentioning

confidence: 99%

“…The Troll field is characterized by a thin oil column (Halvorsen et al 2012;Henriksen et al 2006). The main reservoir drive mechanism of this field is gas expansion so horizontal wells were selected and placed * 0.5 meters above the oil-water contact to maximize oil recovery despite initial water cuts typically being higher than 50% (Mikkelsen et al 2005). Because coning of the gas cap dominated the hydrocarbon production, FCDs were placed to regulate the production profile and longer horizontal laterals were drilled.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design of flow control devices in steam-assisted gravity drainage (SAGD) completion

Banerjee

Hasçakir

2017

J Petrol Explor Prod Technol

View full text Add to dashboard Cite

Commercialization of the steam-assisted gravity drainage (SAGD) process has made recovery of heavy oil/bitumen possible in a number of reservoirs hindered by hydrocarbon immobility. However, the economics of this process are highly sensitive to the efficiency of steam creation, delivery, and use, with a successful and unsuccessful SAGD well pair often separated by how effectively thermal inefficiencies can be mitigated in the flow profiles of steam injection and/or in emulsion recovery. To improve flow profiles, Albertan SAGD completions have experimented with the addition of flow control devices (FCDs). These completion tools have historically been used to regulate liquid inflow across long producing laterals, adding a variable pressure drop along the lateral to improve the conformance of hydrocarbon production and delay water breakthrough; within SAGD completions, FCDs find novel use to force a more even flow distribution of steam in the injector and a thermally dependent inflow profile in the producer to maximize recovery of heavy oil/bitumen. This paper provides a comprehensive overview of different FCD designs, discussing their respective methods of regulation, the fluid-adaptive behavior of ''autonomous'' FCDs, operational strengths and weaknesses of different commercial offerings, and suggestions on how to use existing pressure loss models for FCDs and apply them to the non-traditional application of regulating SAGD flow profiles, both for equipment sizing and estimation of pressure loss/flow rates across the device. From this work, it is proposed that use of autonomous FCDs in the production lateral are of greater value than use of flow control in the injector; however maximum benefits are achieved by coupling simple orifice-style FCDs in the injector lateral with autonomous, large flow path (nonorifice) FCDs capable of controlling steam flash events in the production well.

show abstract

Section: Channel-style Flow Control Devicesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design of flow control devices in steam-assisted gravity drainage (SAGD) completion

Banerjee

Hasçakir

2017

J Petrol Explor Prod Technol

View full text Add to dashboard Cite

show abstract

Section: Channel-style Flow Control Devicesmentioning

confidence: 99%

“…The main reservoir drive mechanism of this field is gas expansion so horizontal wells were selected and placed approximately 0.5 meters above the oil-water contact to maximize oil recovery despite initial water cuts typically being higher than 50% (Mikkelsen et al 2005). …”

Section: Historical Application Of Flow Control Devices (Fcds)mentioning

confidence: 99%

Flow Control Devices in SAGD Completion Design: Enhanced Heavy Oil/Bitumen Recovery Through Improved Thermal Efficiencies

Banerjee

Hasçakir

2017

SPE Western Regional Meeting

View full text Add to dashboard Cite

The volume of heavy oil/bitumen recoverable worldwide is vast in quantity but difficult and energy intensive to extract due to the high in-situ oil viscosity of these unconventional plays. One method of thermal recovery, steam-assisted gravity drainage (SAGD), has proven a commercial success in heavy oil/bitumen production by using steam to raise the temperature of heavy oil/bitumen in the reservoir with a resulting lower hydrocarbon viscosity, shifting the relative mobility of reservoir oil to one favorable for extraction via horizontal wells.However, geological and reservoir heterogeneity often complicate this task resulting in uneven production rates, higher operational costs, and stranded heavy oil/bitumen. This work theorizes that SAGD recovery is improved using flow control devices (FCDs) to force conformance in SAGD laterals. To test this theory, a novel protocol and test flow loop was developed to measure pressure drop across an autonomous hybrid FCD while flowing multiphase mixtures containing steam. This laboratory data was used to qualify existing pressure drop correlations and determine if nitrogen gas, a common test gas to describe FCD pressure drop response, creates suitable data for modeling steam systems. Finally, the flow loop was used to induce a steam "flash", a transition of water at saturation temperature to vapor due to a suddenly decreased pressure

show abstract

Offshore oil and gas records circa 2020

Kaiser

2020

Ships and Offshore Structures

View full text Add to dashboard Cite

The Troll Story

Abstract: TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractAccumulated oil production from

Cited by 18 publications

References 0 publications

Design of flow control devices in steam-assisted gravity drainage (SAGD) completion

Design of flow control devices in steam-assisted gravity drainage (SAGD) completion

Flow Control Devices in SAGD Completion Design: Enhanced Heavy Oil/Bitumen Recovery Through Improved Thermal Efficiencies

Offshore oil and gas records circa 2020

Contact Info

Product

Resources

About