True statements about drive mechanisms include (select any that apply):
__ Secondary recovery requires “repressurizing” or increasing the reservoir pressure.
__ Oil reservoirs are not classified according to their fluid type.
__ Black oil typically ranges from 70 to 150 in molecular weight.
__ Black oil can have a molecular weight of 210.
__ Oils with molecular weights over 150 are usually classified as heavy oils.
__ Volatile oils exhibit an initial oil FVF in the range of 1.5 to 3.0.
__ Black oils exhibit an initial oil FVF in the range of 0.6 to 6.
__ Black oils exhibit an initial oil GOR in the range of 200 to 900 scf/STB.
Keep in mind the the provided Reference Guide will offer no assistance on these types of word problems. There is really no shortcut except to know the material. Translation: study! Most of these word-style questions will come from the SPE Handbook Series (as well as the SPE Textbook Series (TS), especially TS12). So a good study plan is to merely read the parts of the HS you are unfamiliar with. The questions I provide in the 2021 practice problems give a good test of your knowledge.
Click the button for the answer, along with commentary and SPE references sourced. Note that the provided SPE Reference Guide will not help at all on these types of problems. Feel free to ask questions in the comment box below.
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