Recognition of Reservoir Continuity and Reservoir Compartmentalization Using Oil Finger Printing In One of Iranian Oil Region in the Persian Gulf

Abstract

Salman and Resalat oilfields are such marine oilfields that are in vicinity of each other. There is Resalat oilfield in distance about 80-90 kilometers from Lavan Island in Persian Gulf. This oilfield is located in 25 kilometer southwest in Reshat oilfield. Salman oilfield is located in vicinity of water border line of United Arab Emirate in 140 kilometers of south of Lavan Island. This oilfield is remarkable because of its reservoir value and also it is common between Iran and United Arab Emirate. Surmeh reservoir structure is an oily reservoir that it's common between two oilfields. In order to study of geochemistry features, oil samples of Salman and Resalat's oilfield analyzed by using usual geochemistry techniques such SARA test, gaseous chromatography techniques (GC) and gaseous chromatography – mass spectrograph (GC-MS). According to results, including of distribution of values in formed hydrocarbon cuttings of these oils, study of Biomarkers in Terpans and tabloid steranes group from saturation cutting, we can say that hydrocarbons in Surmeh reservoir in Resalat and Salman oilfield show Paraffinic oil features and kerogen type II that all of these indicate organic material with marine origin. The geochemical study of parent rock in these oilfields shows that the active oil system comes from late Cretaceous and the reservoirs were fed from common hydrocarbon system. The gathering hydrocarbons at mentioned oilfields, also, were produced by carbonate source rock with a little shale in revival conditions. The parameters of mature biomarkers in these oilfields show that in border of two oil-forming windows it gathered the suitable organic material for producing good oil. Thus, according to analyses, there is integration between Surmeh reservoir in Resalat and Salman oilfield and their oil come from one resource.