1. STOOIP calculation for a simple oil reservoir An oil field has a mean area of 4500 acres and the mean thickness of the reservoir formation is 25 m. The top 7 m of the formation has a mean porosity of 19% and a mean water saturation of 20%, the middle 12 m of the formation has a mean porosity of 22% and a mean water saturation of 15%, while the remaining 6 m has a mean porosity of 12% and a mean water saturation of 35%. The oil formation volume factor is 1.5 bbl./bbl. (a) Draw a sketch of the reservoir including all of the parameters. (b) Calculate the OOIP giving your results in MMbbl. to one place of decimals. (c) Calculate the STOOIP giving your results in MMbbl. to one place of decimals.