GEOLOGY

Detailed explanation-1: -Effective source rocks are sedimentary rocks, which have already generated and expelled hydrocarbons.

Detailed explanation-2: -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-3: -Organic carbon content in the source rock can be calculated by measuring the amount of CO2 produced. Rock-Eval® is a unique instrument used in the petroleum industry. The organic types (oil-prone or gas-prone) and maturity of source rocks can be estimated using Rock-Eval® pyrolysis.

Detailed explanation-4: -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. Rocks of marine origin tend to be oil-prone, whereas terrestrial source rocks (such as coal) tend to be gas-prone.