PENENTUAN TINGKAT KEMATANGAN TERMAL MINYAK MENTAH PENDALIAN IV KOTO, ROKAN HULU BERDASARKAN PARAMETER INDEKS METILPHENANTREN

Abstract

Determination of thermal maturity level aims to determine the feasibility of  petroleum wells to be exploited because there are many  new wells of petroleum unexploited in the Riau area,  especially Pendalian oil field.   Determination of    thermal maturity  level Pendalian oil fieldwas  done by taking three samples from different wells. The samples were characterized using gas chromatography (GC) for a saturated fractions  and using gas chromatography-mass spectroscopy (GC-MS) for aromatic  fractions.In this study the ratio of isoprenoid and n-alkanewere  used as initial parameters in determining the
thermal maturity and  reinforced with methy lphenatren  index.Metilphenantren index were  used  of MPI-3 and metilphenantren ratio (MPR).The results of the ratio of n-alkane  and isoprenoid indicated  that oil of Pendalian oil field was  mature.This was also confirmed by methylphenantren index that hadvalues of MPI-3 0.741; 0.748; 0.731,  and values of MPR 0.829;  0.814; 0.831 indicated  that Pendalian oil field  was  mature  and classified into a low maturity level.