DETERMINATION OF PETROPHYSICAL PROPERTIES CUTOFF IN HETEROLITHIC RESERVOIRS IN MALAY BASIN

Stanley Jaul Kampit; Samira Albati  Kamaruddin; Akhmal Sidek; Rodziah Rejab; Zulkarnain  Anas; Mohd Nor Hisham Mohd Azam

doi:10.11113/jurnalteknologi.v85.18745

Authors

Stanley Jaul Kampit KUFPEC Malaysia, Level 33 Menara Permata Sapura, KLCC, 50088 Kuala Lumpur, Malaysia https://orcid.org/0000-0003-2722-4306
Samira Albati Kamaruddin Department of Engineering and Technology Razak Faculty of Technology and Informatics Universiti Teknologi Malaysia, 54100 Kuala Lumpur, Malaysia https://orcid.org/0000-0003-1746-033X
Akhmal Sidek Petroleum Engineering Department, School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor Malaysia https://orcid.org/0000-0003-4297-552X
Rodziah Rejab KUFPEC Malaysia, Level 33 Menara Permata Sapura, KLCC, 50088 Kuala Lumpur, Malaysia
Zulkarnain Anas KUFPEC Malaysia, Level 33 Menara Permata Sapura, KLCC, 50088 Kuala Lumpur, Malaysia
Mohd Nor Hisham Mohd Azam Petrofac Malaysia Ltd, Level 28, Menara Prestige 1 Jalan Pinang 50450 Kuala Lumpur, Malaysia

DOI:

https://doi.org/10.11113/jurnalteknologi.v85.18745

Keywords:

MDT pressure test, reservoir characterization, petrophysical cutoff, formation evaluation, heterolithic sand

Abstract

Thinly bedded sand-shale heterolithic are commonly found as a marginal reservoir in the Malay Basin. In the evaluation of heterolithic reservoirs, a key challenge is to determine the appropriate petrophysical properties cutoff. This study used the Modular Dynamic Tester (MDT) pressure tests to determine the appropriate petrophysical properties cutoff applicable to heterolithic intervals. Intrinsic permeability analysis and MDT mobility plots were used to determine the cutoffs for shale volume and total porosity. Subsequently, hydrocarbon pore volume thickness (with shale volume and porosity cutoff applied) was plotted against water saturation to determine the water saturation cut-off value. In this case study, the reservoir cutoffs applied are shale volume less than 60% and total porosity in excess of 12 %. The hydrocarbon pay cutoff was set at a water saturation less than 85 %.

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