1. Calculate the bulk volume of a preserved (paraffin-coated) core sample immersed in water, given the following data: weight of dry sample in air: ! g, weight of dry sample coated with paraffin: !." g (density of paraffin is : !." g#cc), weight of coated sample immersed in water: 1! g (density of water is: 1g#cc) $etermine the rock%s porosity, assuming a sand-grain density of .&' g#cc. . Calculate the bulk volume of a dry core sample immersed in mercury pycnometer, given the following data: weight of dry sample in air: ! g, weight of mercury-filled pycnometer at ! oC : ! g, weight of mercury-filled pycnometer with the sample at ! oC * ." g. density of mercury: 1.+& g#cc. . $etermine the sandstone%s s andstone%s grain density and porosity, given the following data: weight of crushed dry sample in air: 1& g, weight of crushed sample plus absorbed water: 1&.1 g, weight of water-filled pycnometer: & g, weight of water-filled pycnometer with the sample: ' g. +. $etermine the sandstone%s s andstone%s grain volume and porosity using oyl%s law, law, given the following data: volume of chamber containing the core sample: 1 cc, volume of chamber containing air: ' cc, bulk volume of core sample: 1! cc . Calculate the effective porosity of a sandstone sample using the following data: weight of dry sample in air: ! g, weight of saturated sample in air: . g, density of water is : 1.! g#cc), weight of saturated sample in water: 1.& g. &. core core sample sample is is satura saturated ted with with an oil oil (ρo = o API ), ), gas and water. he initial weight of the sample is +.1+ g. fter the gas is displaced by water ( ρw = 1 g /cm), cm), the weight is increased to ."! g. he sample is the placed in aSoxhlet a Soxhlet distillation apparatus, and +.+ cm cm water is e/tracted. fter drying the core sample, the weight is now !".' g. he sample bulk volume, " cm is measured in a mercury mer cury pycnometer. 0ind the porosity, porosity, water saturation, oil saturation, gas saturation and lithology of the core sample. (otice that the oil density is ρ [ g /cm cm] = 1+1.+/(11.+ρ [ o API ]])), when the water density at that particular temperature and pressure is 1 g /cm) cm) '. nother nother core sample sample is brought brought to the the laboratory laboratory for compositio compositional nal analysis, analysis, where where 2! g of the sample is placed in a mercury pycnometer and the volume of gas found is !. cm. cm. piece of the same sample, weighing 1! g is placed in a retorte, where the ater and oil volum volumee is measured measured to .2 cm cm and +.+ +.+ m, respectively. third piece of the sample, weighing "! g is placed in a pycnometer and the bulk volume is measured to be '.+ cm. cm. ssume oil and water densities as in the e/ercise above and find the same characteristic parameters. 2. Calculate the porosity of the sample described below: mass of dry sample: 1!+. g 1!+. g , mass of water saturated sample: 1!. g 1!. g , density of water 1.!!1 g 1.!!1 g /cm, cm, mas of saturated sample immersed in water: &+.' g &+.' g .
3s this effective porosity or the total porosity of the sample4 5hat is the most probable lithology of the matri/ material4 6/plain . ". core, .+ cm long and .+ cm in diameter has a porosity of 7. 3t is saturated with oil and water, where the oil content is 1.cm. a) 5hat is the pore volume of the core4 b) 5hat are the oil and water saturations of the core4 1!. 3f a formation is . m thick, what is the volume of oil-in-place (in m and in bbl ) of a +!.+' hectare large area, if the core described in the e/cercise above is representative of the reservoir4
