Application of Critical Technologies Enabling Low Cost Development of Thin-Bedded Heterogeneous Gas Reservoirs in the Mature North Malay Basin
- Laurent Didier Alessio (CSMP - Shell) | Christopher Howells (CSMP) | Sabry Abdel Mawla Aboel-Abbas | Bruce Jerome Wade | Joanne Lai-Jean Chu (Shell Malaysia) | Stephen Farley Ball (CS Murtiara Petroleum Sdn Bhd)
- Document ID
- Society of Petroleum Engineers
- SPE Asia Pacific Oil & Gas Conference and Exhibition, 11-13 September, Adelaide, Australia
- Publication Date
- Document Type
- Conference Paper
- 2006. Society of Petroleum Engineers
- 5.6.4 Drillstem/Well Testing, 4.5 Offshore Facilities and Subsea Systems, 5.5.11 Formation Testing (e.g., Wireline, LWD), 5.1.5 Geologic Modeling, 5.1 Reservoir Characterisation, 7.1.5 Portfolio Analysis, Management and Optimization, 5.6.3 Deterministic Methods, 3.3.6 Integrated Modeling, 5.6.9 Production Forecasting, 5.5.2 Core Analysis, 1.6.9 Coring, Fishing, 4.3.4 Scale, 3.3.2 Borehole Imaging and Wellbore Seismic, 5.6.1 Open hole/cased hole log analysis, 2.4.3 Sand/Solids Control, 5.1.1 Exploration, Development, Structural Geology, 1.6 Drilling Operations, 5.5.8 History Matching
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CS Mutiara Petroleum is a Petronas Carigali - Shell Malaysia joint operating company formed in 2001, operating since then the PM301 and PM302 exploration PSCs. The company enjoyed a 100% exploration success rate in the North Malay basin, and is now rapidly transitioning into a development venture.
A total of six discoveries were made since 2002 within the PM301 block. The nature of these discoveries: modest size, stacked pay, fluvio-marine transitional geological setting, high heterogeneity, partially sub-seismic resolution, creates a range of technical and economical challenges. The application of a number of specific technologies, notably to reservoir characterization are seen key to unlock the potential of these discovered volumes.
Technically, in the early stages, the seismic attribute-based prediction of gas sand, using a simultaneous inversion technique, was the key enabler for exploration success, allowing to map the presence of coal versus water and gas sands. Now, success through the development phase requires the application of the following technologies:
- Neural-net based seismic facies, aimed at resolving lateral heterogeneity at field scale and improving the understanding of the ranges of drainage areas for development wells
- Low resistivity pay analysis, geared towards understanding of both static (saturation, net-to-gross) and dynamic (permeability) parameters
- Multiple realisation 3D modelling, using stochastic simulation, guided by techniques borrowed from Experimental Design.
In addition to technical challenges, critical to unlocking these volumes is the economical optimisation of the cluster development, within a consistent portfolio management framework. This is done by using modelling at various levels: 3D modelling at field level, testing different geological concepts and the associated key uncertainties; those are then scaled up into an integrated surface-subsurface nodal network model to optimise the development of the discoveries as well as the near field potential remaining prospects.
CS Mutiara Petroleum is a Petronas Carigali - Shell Malaysia joint operating company formed in 2001, operating since then the PM301 and PM302 exploration PSCs. The company has enjoyed so far a 100% exploration success rate in the North Malay basin, with a total of eight discoveries, six of which in PM301, and is now rapidly transitioning into a development venture.
Block PM301 and PM302 are located in the Northern-most part of the Peninsular Malaysia acreage, just south of the Malaysia-Thailand joint development area (MTJDA) as shown on Figure 1.
Geologically the acreage covered by PM301 may be divided into three zones; the Basin Centre, Hinge Line and Platform/Southwest Flank areas (Figure 2). Distinct plays exists within each area and a total of fifteen exploration/appraisal wells have been drilled by various operators; mostly in the Basin Centre where the core of the PM301 development sits, one in the Hinge Line and two on the Platform area, testing all three play areas. CSMP has drilled to date eight wells in PM301, discovering and appraising six discoveries: B.Melati, B.Kamelia, B.Anggerik, B. Zetung, Bumi South,and B.Kesumba.
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