GENERAL GEOLOGY

GEOLOGY

GEOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Decide the quality of source rock.TOC = 0.98 wt. %S1 = 1.90 mg HC/g rockS2 = 1.11 mg HC/g rock Tmax = 460
A
Peak of maturity
B
Type I
C
Dead carbon.
D
Woody plants of organic derived-input.
Explanation: 

Detailed explanation-1: -Source rocks are usually shales or limestones (sedimentary rocks). To be a productive source rock, the rock needs time to mature (time to form the oil and/or gas) and the hydrocarbons need to be able to migrate to a reservoir or seep.

Detailed explanation-2: -A rock rich in organic matter which, if heated sufficiently, will generate oil or gas. Typical source rocks, usually shales or limestones, contain about 1% organic matter and at least 0.5% total organic carbon (TOC), although a rich source rock might have as much as 10% organic matter.

Detailed explanation-3: -Source rock potential is evaluated based on three parameters (organic amount, organic type, and maturity). Analytical instruments, such as elemental analyzers, Rock-EvalĀ® instruments, and vitrinite reflectance microscopes, are used for analysis of outcrop samples, well cuttings, and cores.

Detailed explanation-4: -Source rocks are the product of the deposition, preservation, compaction, and lithification of detrital sediment and organic matter at the sediment water interface in lacustrine or marine basins.

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