GEOLOGY
GEOCHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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V. Good
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Poor
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Good
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Excellent
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Detailed explanation-1: -Based on the established source rocks quality values (Table 3), it can be noticed that if the TOC of source rock is greater than 1 percent, the rock can be a good source rock. If the rock contains greater than 4 percent Total Organic Carbon, then it has an excellent petroleum potential.
Detailed explanation-2: -Total organic carbon (TOC) is the main measurement used for estimating the quality and productivity of a source rock. The source rock-usually an organic rich shale-contains various carbon compounds such as kerogen, bitumen, oil and gas.
Detailed explanation-3: -Rock Eval pyrolysis S1 = the amount of free hydrocarbons (gas and oil) in the sample. S2 = the amount of hydrocarbons generated through thermal cracking of nonvolatile organic matter. S3 = the amount of CO2 (in milligrams CO2 per gram of rock) produced during pyrolysis of kerogen.
Detailed explanation-4: -Effective source rocks are sedimentary rocks, which have already generated and expelled hydrocarbons.