Lessons From Trinidad's CO2 Immiscible Pilot Projects 1973-2003

Mohammed-Singh, Lorna J.; Singhal, A.K.

doi:10.2523/89364-ms

Cited by 13 publications

(11 citation statements)

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“…CO 2 projects at Budafa and Lovvaszi fields are two cases well documented in the literature [158]. Szank Field represents a more recent CO 2 -EOR flood in Hungary using CO 2 from a sweetening plant [160].  Trinidad also has more than three decades experience operating CO 2 -EOR projects using CO 2 an ammonia plant nearby the fields [161].…”

Section: Chemical Methodsmentioning

confidence: 99%

Enhanced Oil Recovery: An Update Review

2010

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With the decline in oil discoveries during the last decades it is believed that EOR technologies will play a key role to meet the energy demand in years to come. This paper presents a comprehensive review of EOR status and opportunities to increase final recovery factors in reservoirs ranging from extra heavy oil to gas condensate. Specifically, the paper discusses EOR status and opportunities organized by reservoir lithology (sandstone and carbonates formations and turbiditic reservoirs to a lesser extent) and offshore and onshore fields. Risk and rewards of EOR methods including growing trends in recent years such as CO 2 injection, high pressure air injection (HPAI) and chemical flooding are addressed including a brief overview of CO 2 -EOR project economics.

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Section: Chemical Methodsmentioning

confidence: 99%

Enhanced Oil Recovery: An Update Review

2010

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“…The reservoir consisted of thick sands containing medium-gravity oil (API gravity of [17][18][19][20][21][22][23][24][25][26][27][28][29]. It was predicted that immiscible CO 2 -EOR would result in extra oil recovery of about 2%-8% of OOIP [48].…”

Section: Field Enhanced Oil Recovery Projectsmentioning

confidence: 99%

“…It was predicted that immiscible CO2-EOR would result in extra oil recovery of about 2%-8% of OOIP [48].…”

Section: Opportunities For Co 2 -Eor Process Improvementmentioning

confidence: 99%

A Review of CO2-Enhanced Oil Recovery with a Simulated Sensitivity Analysis

et al. 2016

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This paper reports on a comprehensive study of the CO 2 -EOR (Enhanced oil recovery) process, a detailed literature review and a numerical modelling study. According to past studies, CO 2 injection can recover additional oil from reservoirs by reservoir pressure increment, oil swelling, the reduction of oil viscosity and density and the vaporization of oil hydrocarbons. Therefore, CO 2 -EOR can be used to enhance the two major oil recovery mechanisms in the field: miscible and immiscible oil recovery, which can be further increased by increasing the amount of CO 2 injected, applying innovative flood design and well placement, improving the mobility ratio, extending miscibility, and controlling reservoir depth and temperature. A 3-D numerical model was developed using the CO 2 -Prophet simulator to examine the effective factors in the CO 2 -EOR process. According to that, in pure CO 2 injection, oil production generally exhibits increasing trends with increasing CO 2 injection rate and volume (in HCPV (Hydrocarbon pore volume)) and reservoir temperature. In the WAG (Water alternating gas) process, oil production generally increases with increasing CO 2 and water injection rates, the total amount of flood injected in HCPV and the distance between the injection wells, and reduces with WAG flood ratio and initial reservoir pressure. Compared to other factors, the water injection rate creates the minimum influence on oil production, and the CO 2 injection rate, flood volume and distance between the flood wells have almost equally important influence on oil production.

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“…However, some field projects involving immiscible CO 2 or hydrocarbon flooding (e.g. Lick Creek, Kuparuk River, Forest Reserves, Brage and Gullfaks) showed that WAG could be applied in the immiscible mode also [3][4][5][6][7][8][9][10].…”

Section: Feasibility Studiesmentioning

confidence: 99%

Water-Alternating-Gas (WAG) Pilot Implementation, A First EOR Development Project in Dulang Field, Offshore Peninsular Malaysia

Nadeson¹,

Aidil²,

Singhal³

et al. 2004

Proceedings of SPE Asia Pacific Oil and Gas Conference and Exhibition

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractSome of the older oil fields in Malaysia can be characterized as mature water floods. Schemes for enhancing and prolonging the already declining production and diminishing reserves strategically call for timely implementation of Enhanced Oil Recovery, EOR applications.Among various Enhanced Oil Recovery (EOR) processes and techniques, Malaysia's reservoirs appear especially amenable to gas injection. Feasibility studies showed that immiscible Water-Alternating-Gas (WAG) injection is potentially the most practical and viable option. Laboratory studies and numerical simulation study conducted on the applicability of immiscible WAG injection using high CO 2 content gas indicated that an additional 5-7% of OOIP can be recovered [1]. Such a gain will result in reserves growth and extended producing life of these reservoirs. WAG application is being field tested by implementing a pilot in a sub-block, South-3 of the Dulang field, which is isolated from other subblocks, by major faults. One in-fill well was drilled specifically for the current pilot. Upon drilling this infill well, several geological complexities were uncovered, that called for a thorough revisit of modelling and pilot conceptual plans. The pilot area contains 6 wells, three of which are being used as producers during WAG operations.This paper discusses detail of our first ever EOR pilot implementation (Immiscible WAG in Dulang oil field). It describes progression from conceptual design to various challenges, results and the lessons learnt during early periods of implementation.

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Lessons From Trinidad's CO2 Immiscible Pilot Projects 1973-2003

Cited by 13 publications

References 0 publications

Enhanced Oil Recovery: An Update Review

Enhanced Oil Recovery: An Update Review

A Review of CO2-Enhanced Oil Recovery with a Simulated Sensitivity Analysis

Water-Alternating-Gas (WAG) Pilot Implementation, A First EOR Development Project in Dulang Field, Offshore Peninsular Malaysia

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