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The AAPG/Datapages Combined Publications Database

Southeast Asia Petroleum Exploration Society (SEAPEX)


Proceedings of the 2003 South East Asia Petroleum Exploration Society (SEAPEX) Conference, 2003
Pages 1-36

Reservoir Characterisation of the Malampaya Field, a Carbonate Reefal Build-up in the Philippines

Nick Dancer


Malampaya Field is an Oligo-Miocene carbonate reservoir with high porosity and a large variation in permeability at a depth of ~3000m TVDSS. There is a 650 m gas column with 56 m oil rim (API 29.4), a GIIP ~4.1 Tcf and 300 MMbbls STOIIP. A 1990 3D survey produced data with low resolution, PreStack Depth Migration in 1994 improved imaging and then reprocessed PreStack Depth Migration in 2000 significantly enhanced imaging. In 2002, 3D High Resolution Survey increased the vertical resolution from 80m to at least 50m, reduced the noise within reservoir and preserved relative amplitude information for quantitative analysis. Diagenesis effects the porosity of the Malampaya Field, early diagenesis included cementation of the flanks decreasing porosity and meteoric leaching of the lagoon increased porosity. Late staged diagenesis during burial decreased the porosity with cementation along the faults as well as increased the porosity by late leaching by mixing of burial fluids and pore waters. Three types of reservoir rock type are seen in the Malampaya Field: dense/tight, porous- super k, and porous and permeable. Static modelling with new data allows increased confidence to map inter Nido reflectors (14 horizons). All types of data including 3D seismic, diagenetic analysis and production data have been integrated to provide a consistent static and dynamic model that is updated with new data to provide and enhanced understanding of uncertainty in the reservoir.

Presented at: 2005 South East Asia Petroleum Exploration Society (SEAPEX) Conference, Singapore, 2003

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