Abstract:
Naimat basal-1 and Siraj south-1 are located in Khipro block which is amongst the hydrocarbon producing blocks in Sanghar district, Lower Indus basin, Pakistan. Khipro area is producing around 21 million standard cubic feet day (MMscfd) of gas, 1200 barrel of oil per day (BOPD) and 50 million ton (MT) of liquefied petroleum gas (LPG).
Main purpose of this thesis is to evaluate the hydrocarbon potential of two wells of the Khipro block, namely Naimat basal-1 and Siraj south-1, for which different petrophysical characteristics were evaluated with the help of wireline logs. The evaluation of petrophysical characteristics includes the determination of volume of shale, lithology, porosity, permeability, saturation of water, saturation of hydrocarbon, saturation of flushed zone, moveable hydrocarbons, bulk volume of water, pore volume of hydrocarbon and net pay thickness was calculated by using different techniques.
In Naimat basal-1, the average values of shale volume 31.12%, porosity 8.67%, water saturation 57.35%, hydrocarbon saturation 42.65%, saturation of flushed zone 83.7%, moveable hydrocarbons 31.87%, permeability 8.47mD, bulk volume of water 0.02% and pore volume of water 0.02% respectively. In Siraj south-1, the average values of shale volume 16.75%, porosity 10.97%, water saturation 65.32%, saturation of hydrocarbon 34.66%, saturation of flushed zone 80.55%, moveable hydrocarbons 16.44%, permeability 2.93mD, bulk volume of water 0.04% and pore volume of hydrocarbon 0.03% respectively.
The net pay thickness of Naimat basal-1 is 43 feet and Siraj south is 145 feet respectively, it shows that the Siraj south-1 has more ability to produce hydrocarbons economically as compared to the Naimat basal-1. Main source and reservoir rocks of this area are the Cretaceous, Sembar and Goru formations respectively. The reservoir rocks here are capped by the interbedded shales of the Goru Formation.
These petrophysical evaluations prove that both the wells have the potential to produce the hydrocarbon economically.
