Abstract:
Crude oil is the main energy resources for industry, transportation and house hold
needs. The demand for crude oil in Indonesia is much higher than its production which
leads to current energy crisis. One of solutions for this crisis is to conduct correlation
study, which determines the genetic relationship at each oil well. The correlation
study of crude oil between in Bangko Rokan Hilir with Duri Bengkalis has not been
conducted previously. This study could assist to provide the indication of the genetic
relationship, deposition zone, souce rock and the origins of Bangko and Duri’s crude
oil. The crude oil samples taken immediately from oil wells was first refrigerated
before conducting geochemistry analysis. The samples were then fractionated by
column to separate saturated fraction. This fraction was analyzed using Gas
Chromatography (GC). On the basis of the abudance of hydrocarbon aliphatic, the
crude oils samples have small ratio value, which is 0,38-0,50 for Pr/n-C17 and 0,16-0,18
Ph/n-C18. This values indicated that the samples were originated from higher vascular
plants (terrestrial). The samples derived from lacustrine environments (lake) have ratio
value of Pr/Ph (2,50-2,90). The calculation from Star diagram have showed that the
samples of production oil field in Bangko (MB-07, MB-026 and MB-172) are
positively correlated, but the samples of production oil field in Bangko MB-07 with
MB-026 is closer correlation than the MB-172, whereas the oil samples in area MB-07,
MB-026 dan MB-172 of Bangko with the oil sample in Duri (MD-01) are negatively
correlated. The positive correlation indicated that the samples have the genetic
relationship at each oil, a same source matter.
