Effective Well and Reservoir Management Reverses Production Decline in a Major Brownfield in South Oman

Choudhuri, Biswajit; Qarshubi, Ibrahim Saif; Sadek, Ehab; Bharti, Sanjay Kumar; Al-Mahrooqi, Salim Mohd

doi:10.2118/101381-ms

Cited by 5 publications

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Success Story of a Waterflood Project in a Geologically Complex, High-Viscosity Oil Reservoir in a Major Brownfield in South Oman

Choudhuri¹,

Al-Rawahi²

2008

SPE Reservoir Evaluation &Amp; Engineering

View full text Add to dashboard Cite

Summary This paper presents the success story of waterflooding in a geologically complex reservoir that contains high-viscosity (90 cp) oil. This reservoir is part of a large brownfield in south Oman and has been on production for more than 25 years. The reservoir comprises glacial sandstones of Palaeozoic age and is highly heterogeneous, with wide variation in reservoir characteristics at scales smaller than well spacing. The reservoir geology is complicated because of the presence of faults and fractures. The reservoir has been subdivided into different areas that we call "catchments," characterized by their geological setting and dynamic reservoir behavior. Full-field water injection was started in the field after approximately 18 years of primary depletion. Different water-injection philosophies for different areas of the field have been adopted with consideration to factors such as primary drive mechanism operative in the reservoir, presence or absence of vertical-flow barriers; pre-existing field-development pattern; and more importantly, future development beyond waterflood to maximize the value of the reservoir in its entire life cycle. The paper illustrates that the success of a waterflood in a complex reservoir relies on the implementation of a tailor-made development plan with flexibility to be changed on the basis of data from reservoir surveillance. The importance of well and reservoir management (WRM) to improve the value of waterflood is emphasized.

show abstract

Success Story of a Waterflood Project in a Geologically Complex, High-Viscosity Oil Reservoir in a Major Brownfield in South Oman

Choudhuri¹,

Al-Rawahi²

2008

SPE Reservoir Evaluation &Amp; Engineering

View full text Add to dashboard Cite

show abstract

FDP-Revisions: Keeping Your FDP's Green in a Fit-For-Purpose Manner

Garimella¹,

Kloosterman²,

Horstmann³

et al. 2009

All Days

View full text Add to dashboard Cite

Petroleum Development Oman (PDO) is operating many technically complex and mature onshore oil fields in the Sultanate of Oman. Recently PDO has established a ring-fenced Study Centre to carry out Integrated Field Studies to maintain up-to-date Field Development Plans (FDP's). Generation of a robust updated FDP typically takes up to 18 months, and takes into account full subsurface uncertainty and development options analysis in order to arrive at the optimum development. When executing these FDPs, new subsurface data comes in, which often generates new insights in the field that need to be incorporated. This does not require always a full new FDP-study, but a focused revision of the existing FDP. A so-called 'Hit-Squad' team was established to deliver these quick & fit-forpurpose FDP-revisions.In this paper, a case study is presented related to a mature clastic oil field in the Sultanate of Oman. The latest FDP, generated in 2004, proposed a peripheral waterflood, however, the expected pressure support was not observed in the crestal part of the field. This created an exposure in terms of expected oil recovery and jeopardised the remainder of the FDP-implementation. This paper describes how the 'Hit Squad' attacked the problem and delivered a fit-for-purpose FDP-revision to bring the remainder of the development back on track.

show abstract

Performance Review of Polymer Flooding in a Major Brown Oil Field of Sultanate of Oman

Thakuria¹,

Al-Amri²,

Al-Saqri³

et al. 2013

All Days

View full text Add to dashboard Cite

The first field scale Polymer flood project in the Middle East region is being implemented in an oil field of Sultanate of Oman from early 2010. The oil field discussed here containing viscous oil (90 cp) was discovered in 1956 and is located in eastern part of South Oman Salt basin. First commercial production started in 1980 from this field. The field has gone through different development phases in its 30 years of history prior starting tertiary recovery phase by polymer flooding. This field scales Polymer flood project comprising 27 patterns as Phase-1 covers about one third of the total field IOIP (initial oil in place). It is worth mentioning that whole field is under water flooding and water injection was going on prior to initiation of Polymer flood in all these 27 injectors. Further extension in phases to full field polymer flooding is under evaluation. Till now this Polymer flood project has successfully completed 3 years of good performance contributing to significant oil gain. This paper describes briefly about the principles involved in polymer flooding, planning of this polymer flood project, field implementation and field examples of polymer response. In addition, a few practical aspects of managing key issues in polymer flooding like- fracture growth in injectors, shear degradation of polymer solution, pattern conformance and back produced polymer has been covered in this paper.

show abstract

Effective Well and Reservoir Management Reverses Production Decline in a Major Brownfield in South Oman

Cited by 5 publications

References 4 publications

Success Story of a Waterflood Project in a Geologically Complex, High-Viscosity Oil Reservoir in a Major Brownfield in South Oman

Success Story of a Waterflood Project in a Geologically Complex, High-Viscosity Oil Reservoir in a Major Brownfield in South Oman

FDP-Revisions: Keeping Your FDP's Green in a Fit-For-Purpose Manner

Performance Review of Polymer Flooding in a Major Brown Oil Field of Sultanate of Oman

Contact Info

Product

Resources

About