Oilfield Glossary
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Searched for "petroleum system" in Term Name (2 result(s) found)

petroleum systems modeling

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1. n. [Shale Gas]
A technique used to represent the history of a sedimentary basin, including the processes and components necessary to form petroleum: a petroleum source rock, a reservoir, a trapping mechanism, a seal, and the appropriate relative timing of formation of these. Using geologic, geophysical, and engineering data, scientists create a 3D model of the subsurface that can be used to understand whether petroleum is present and how much might exist in potential traps. Petroleum systems models can be used to help predict pore pressure and plan well construction and field development. A useful petroleum systems model can be used to identify and explain inconsistencies in the data. The resulting models are valuable during exploration for identifying resource richness, such as sweet spots in unconventional plays such as shale gas, and during field development and production for improving completion efficiency. Petroleum systems modeling is distinct from reservoir simulation in that it covers a larger scale that might include multiple oil and gas fields and considers a geologic time frame of millions of years rather than a production time frame of years or decades.

petroleum system

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1. n. [Geology]
Geologic components and processes necessary to generate and store hydrocarbons, including a mature source rock, migration pathway, reservoir rock, trap and seal. Appropriate relative timing of formation of these elements and the processes of generation, migration and accumulation are necessary for hydrocarbons to accumulate and be preserved. The components and critical timing relationships of a petroleum system can be displayed in a chart that shows geologic time along the horizontal axis and the petroleum system elements along the vertical axis. Exploration plays and prospects are typically developed in basins or regions in which a complete petroleum system has some likelihood of existing.