SINGLE OR MULTIPLE POROSITY CUT-OFF? A NEW RELEVANCE PROVIDED BY APPLICATION OF A NEW APPROACH  

Oleh:

Widarsono, Bambang

Jenis: Article from Journal - ilmiah nasional
Dalam koleksi: Lemigas Scientific Contributions to Petroleum Science & Technology vol. 33 no. 01 (May 2010), page 1.
Topik: Porosity cut-off; Heterogenous reservoir; Porosity

Ketersediaan

Perpustakaan PKPM Nomor Panggil: L15 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

Porosity cut-off is one of the most important parameter normally used to differentiate between reservoir and non-reservoir rocks. Quantity of the parameter certainly dictates reservoir volumes, hence directly influences economics and commerciality of a given oill gas field. An ever critical issue in relation to this parameter is whether the use of porosity cut-off has to be established through a single or multiple values especially for heterogeneous formation rocks. This certainly may lead to different reservoir sizes along with the technical and economical consequences. The study presented in this article is meant to further investigate this question. The thrust of this study lies on the application of a newly proposed method for determining porosity cut-off It is put that with this new and reliable method - compared to the traditionally used method - a more conclusive answer can be achieved. For the purpose, a heterogeneous limestone reservoir in West Java - indonesia is used. Evaluation, analysis, and application of the new method on data from the field's eight wells have shown that multiple porosity cut-off values are needed for better definitions of reservoirs. Application of a single value for these reservoirs can still be regarded as unrepresentative. The fact underlines that - despite the new approach's reliability heterogeneity governs more over the use of either single or multiple cut-off values rather than limitations of method. The study also proves that the new method for determining porosity cut-off works well for highly heterogeneous reservoir rocks.

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