![]() In 2021 BP Plc estimates that there are 1.73 trillion barrels of oil reserves in the world. It provides an effective methodology to better define resources and reservoirs. Unconventional Oil and Gas Resources Handbook: Evaluation and Development. If you are interested in learning more about Oil and Gas Resources, Amazon has a helpful handbook. Once the oil is extracted and refined, it can be distilled or undergo hydrocarbon cracking to form products and fuels Energy Ed. The well can be vertical, directional, or horizontal depending on how much access to the deposit is needed.ĭirectional and horizontal drilling allows more of the well to be in the deposit itself, increasing the flow of the oil. Generally, extraction requires a well that is drilled into a reservoir containing crude oil. Unconventional resources include heavy oil, tar sands, shale gas, shale oil, tight gas, and coalbed gas. This type of oil requires hydraulic fracturing to access. Unconventional oil, primarily shale oil is held tightly in non-permeable shale deposits and thus more difficult to extract. Impermeable rocks called cap rocks surround the reservoir and trap oil in its place.Ĭonventional oil is held in these traps or reservoirs of porous and permeable rock. These rocks have tiny spaces in them that allow them to hold water, natural gas, and/or oil. Oil is found in specific underground rocks called reservoirs. Interested? Visit this map of Meteorite Landings Oil Extraction Chondrite meteorites contain more than 6% organic matter and traces of hydrocarbons. ![]()
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