Conformance Control and Proactive Reservoir Management Improve Deepwater Production
- Adam Wilson (JPT Editorial Manager)
- Document ID
- Society of Petroleum Engineers
- Journal of Petroleum Technology
- Publication Date
- September 2013
- Document Type
- Journal Paper
- 118 - 121
- 2013. International Petroleum Technology Conference
- 1 in the last 30 days
- 130 since 2007
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This article, written by Editorial Manager Adam Wilson, contains highlights of paper IPTC 16702, "Deepwater Production Improvement Through Proactive Reservoir Management and Conformance Control," by Rahim Masoudi, SPE, Hooman Karkooti, SPE, Shlok Jalan, SPE, Anndy Arif, Keng S. Chan, SPE, and Mohamad B. Othman, SPE, Petronas; and Steve Burford and Philip Bee, Murphy Sabah Oil, prepared for the 2013 International Petroleum Technology Conference, Beijing, 26-28 March. The paper has not been peer reviewed.
The K field is one of the more developed deepwater fields currently going through development in Malaysia. It has an excellent data set from which to optimize future development activities. In hindsight, it is clear that much more complexity exists than initially thought. As a result, uncertainty does not necessarily diminish at the start of production and a comprehensive collection and analysis of dynamic performance data are required in order to optimize recovery further.
Field Background and Geological Setting
The K field is a deepwater development located in 1330-m water depth offshore Sabah, Malaysia. The field was discovered by the K-1 well drilled to a depth of 3600 m on 30 July 2002 and marked the start of deepwater development in Malaysia. Five years after first oil, the field has more than 30 active wells including producers and injectors.
The K field is located in Block K (Fig. 1) and comprises the outbound tract of a major northwest/southeast-trending foreland fold-thrust belt that extends from Brunei to the Philippines and forms the margin of the North Sabah trough. Block K is dominated by fold-thrust structures. The reservoir section of the K field is dominated by mass-transport deposits with interspersed complex reservoir-bearing turbidite deposits.
Subsurface Development Challenges
The deepwater fields under development and study phases in Malaysia are usually considered to have more or less similar subsurface complexities and uncertainties. Among these uncertainties are level of heterogeneity, thinly-bedded-to-blocky sands, compartmentalization, fault intensity and behavior, reservoir connectivity, pressure and flow communication across the field, injection requirement from early production time, sand/fines production and reactive shale, wellbore stability, and commonly inadequate available data at the time the development decision is made.
The typical type log in the K field shows the reservoir has been subdivided into eight distinct reservoir packages labeled H110 through H150. In this ex-ample, the gross reservoir thickness (h) is 492 m with a net sand thickness of 50 m, giving an overall net/gross ratio of 0.102. Apparent from the type log is a large percentage of thinly bedded reservoirs, characterized to be beds that are less than 30 cm thick.
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