Thermal history modelling is an exercise undertaken during basin modelling to evaluate the temperature history of stratigraphic layers in a sedimentary basin.[1]
The temperatures undergone by rocks in a sedimentary basin are crucial when attempting to evaluate the quantity, nature and volume of hydrocarbons (fossil fuels) produced by diagenesis of kerogens (a group of chemicals formed from the decay of organic matter).
Fourier's Law provides a simplified one-dimensional description of the variation in heat flow Q as a function of thermal conductivityk and thermal gradient dT/dz:
(The minus sign indicates that heat flows in the opposite direction to increasing depth, that is, towards the Earth's surface.)
If the assumptions used to justify this simplified approximation (i.e. steady-state heat conduction, no convection or advection) are accepted, we define the simple 1-dimensional heat diffusion equation where temperature T at a depth z and time t is given by the equation:
where Tt0 is the surface temperature history, Qt is the heat flow history and k is thermal conductivity. The integral thus represents the integrated thermal conductivity history of a 1-dimensional column of rock.
Thermal history modelling attempts to describe the temperature history Tz,t and therefore requires a knowledge of the burial history of the stratigraphic layers which is obtained through the process of back-stripping.
Referencesedit
^Vermeesch, Pieter; Tian, Yuntao (2014-12-01). "Thermal history modelling: HeFTy vs. QTQt". Earth-Science Reviews. 139: 279–290. Bibcode:2014ESRv..139..279V. doi:10.1016/j.earscirev.2014.09.010. ISSN 0012-8252.
thermal, history, modelling, exercise, undertaken, during, basin, modelling, evaluate, temperature, history, stratigraphic, layers, sedimentary, basin, thermal, history, basin, usually, calibrated, using, thermal, indicator, data, including, vitrinite, reflect. Thermal history modelling is an exercise undertaken during basin modelling to evaluate the temperature history of stratigraphic layers in a sedimentary basin 1 The thermal history of a basin is usually calibrated using thermal indicator data including vitrinite reflectance and fission tracks in the minerals apatite and zircon The temperatures undergone by rocks in a sedimentary basin are crucial when attempting to evaluate the quantity nature and volume of hydrocarbons fossil fuels produced by diagenesis of kerogens a group of chemicals formed from the decay of organic matter Fourier s Law provides a simplified one dimensional description of the variation in heat flow Q as a function of thermal conductivity k and thermal gradient dT dz Q k d T d z displaystyle Q k frac dT dz The minus sign indicates that heat flows in the opposite direction to increasing depth that is towards the Earth s surface If the assumptions used to justify this simplified approximation i e steady state heat conduction no convection or advection are accepted we define the simple 1 dimensional heat diffusion equation where temperature T at a depth z and time t is given by the equation T z t T t 0 Q t 0 z d z k z displaystyle T z t T t 0 Q t int 0 z frac dz k z where Tt0 is the surface temperature history Qt is the heat flow history and k is thermal conductivity The integral thus represents the integrated thermal conductivity history of a 1 dimensional column of rock Thermal history modelling attempts to describe the temperature history Tz t and therefore requires a knowledge of the burial history of the stratigraphic layers which is obtained through the process of back stripping References edit Vermeesch Pieter Tian Yuntao 2014 12 01 Thermal history modelling HeFTy vs QTQt Earth Science Reviews 139 279 290 Bibcode 2014ESRv 139 279V doi 10 1016 j earscirev 2014 09 010 ISSN 0012 8252 See also editPetroleum geology nbsp This sedimentology article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Thermal history modelling amp oldid 1166830889, wikipedia, wiki, book, books, library,
