Numerical approach for thermal history modelling in multi-episodic rifting basins

Abstract

Pre-existing models for thermal history modelling have shown deficiency in explicit algorithms to establish the quantitative relationship between maturity indices and thermal gradients in some sedimentary basins that experienced multi-episodic rifting evolution. In this study, a forward and inverse combination model (FICM) is proposed to estimate the vitrinite reflectance (Ro) and thermal gradients. The forward module is used to calculate Ro values. It couples the EASY%Ro model with burial history reconstruction with consideration of thermal gradient variations during basin evolution. The inverse module reconstructs histoical thermal gradients by calibrating cmputed Ro against measured Ro data. The time-temperature series is a necessary input for both forward and inverse modules. Sample density is a profound factor influencing the accuracy of modelling results. In order to obtain satisfying outputs, a sufficient sample density is required. Thermal gradients are assumed to vary linearly between two given samples. Modelling results of case studies indicate that the sensitivity of heating time to Ro evlution is differnt with thermal gradients depending on geolgoical setting. Three difffernt districts, which include the time-sensitive area, the temperature-sensitive area and the non-sensitive area, can be recognized on the the relationship map among Ro variations, heating time and geothermal gradients. This model can be applied to reconstruct the thermal history and maturation evolution in a basin that has undergone complex multi-episodic rifting.

Keywords

thermal history / maturity / EASY%Ro / burial history / vitrinite reflectance

References

[1] Barker C E, Pawlewicz M J. The Correlation of Vitrinite Reflectance with Maximum Temperature in Humic Organic Matter. Paleogeothermics, 1986, 5: 79-93.

[2] Beha A, Thomsen R O, Littke R. A Rapid Method of Quantifying the Resolution Limits of Heat Flow Estimates in Basin Models. Journal of Petroleum Geology, 2008, 31(2): 167-178.

[3] Burnham A K, Sweeney J J. A Chemical Kinetic Model of Vitrinite Maturation and Reflectance. Geochemica Cosmochimica Acta, 1989, 53: 2649-2657.

[4] Carr A D. A Vitrinite Reflectance Kinetic Model Incorporating Overpressure Retardation. Marine and Petroleum Geology, 1999, 16(4): 355-377.

[5] Ding R X, Wang W. Paleotopographic Reconstruction on the Basis of Low-Temperature Thermochronological Thermal History Modelling. Journal of Earth Science, 2013, 24(4): 652-656.

[6] Falvey D A. The Development of Continental Margins in Plate Tectonic Theory. Journal of Association of Petroleumand Explosives Administration, 1974, 14: 95-106.

[7] Fjeldskaar W, Grunnaleite I, Zweigel J, . Modelled Palaeo-Temperature on Voring, Offshore Mid-Norway—The Effect of the Lower Crustal Body. Tectonophysics, 2009, 474(3–4): 544-558.

[8] Galushkin Y, Simonenkova O, Lopatin N. Thermal and Maturation Modelling of the Urengoy Field, West Siberian Basin: Some Special Considerations in Basin Modeling. AAPG Bulletin, 1999, 83(12): 1965-1979.

[9] Hunt J M, Lewan M D, Hennet R J. Modelling Oil Generation with Time-Temperature Index Graphs Based on the Arrhenius Equation. AAPG Bulletin, 1991, 75(4): 795-807.

[10] Huvaz O, Karahanoglu N, Ediger V. The Thermal Gradient History of the Thrace Basin, NW Turkey: Correlation with Basin Evolution Processes. Journal of Petroleum Geology, 2007, 30(1): 3-23.

[11] Huvaz O, Thomsen R O, Noeth S. A Method for Analyzing Geothermal Gradient Histories Using the Statistical Assessment of Uncertainties in Maturity Models. Journal of Petroleum Geology, 2005, 28(2): 107-117.

[12] Karig D, Hou G. High-Stress Consolidation Experiments and their Geologic Implications. Journal of Geophysical Research, 1992, 97(B1): 289-300.

[13] Li Z X, Xu M, Zhao P, . Geothermal Regime and Hydrocarbon Kitchen Evolution in the Jianghan Basin. Science China: Earth Sciences, 2013, 56(2): 240-257.

[14] Littke R, Buker C, Luckge A, . A New Evaluation of Palaeo-Heat Flows and Eroded Thicknesses for the Carboniferous Ruhr Basin, Western Germany. International Journal of Coal Geology, 1994, 26(3–4): 155-183.

[15] Liu W C, Ye J R, Lei C, . Geothermal and Maturation Histories Modeling of the Source Rocks in the Ledong Sag, Qiongdongnan Basin. Geological Science and Technology Information, 2011, 30(6): 110-115.

[16] McKenzie D. Some Remarks on the Development of Sedimentary Basins. Earth and Planetary Science Letters, 1978, 40: 25-32.

[17] Mohamed A Y, Iliffe J E, Ashcroft W A, . Burial and Maturation History of the Heglig Field Area, Muglad Basin, Sudan. Journal of Petroleum Geology, 2000, 23(1): 107-128.

[18] Mohsenian E, Fathi-Mobarakabad A, Sachsenhofer R F, . 3D Basin Modelling in the Central Persian Gulf, Offshore Iran. Journal of Petroleum Geology, 2014, 37(1): 55-70.

[19] Morrow D W, Issler D R. Calculation of Vitrinite Reflectance from Thermal Histories: A Comparison of Some Methods. AAPG Bulletin, 1993, 77(4): 610-624.

[20] Qiu N S, Chang J, Zuo Y H, . Thermal Evolution and Maturation of Lower Paleozoic Source Rocks in the Tarim Basin, Northwest China. AAPG Bulletin, 2012, 96(5): 789-821.

[21] Sclater J G, Christie P A F. The Heat Flow through Oceanic and Continental Crust and the Heat Loss of the Earth. Reviews Geophysics and Space Physics, 1980, 18: 269-311.

[22] Suzuki N, Matsubayashi H, Waples D W. A Simpler Kinetic Model of Vitrinite Reflectance. AAPG Bulletin, 1993, 77(9): 1502-1508.

[23] Sweeney J J, Burnham A K. Evaluation of a Simple Model of Vitrinite Reflectance Based on Chemical Kinetics. AAPG Bulletin, 1990, 74(10): 1559-1570.

[24] Tang Z H, Wu Y H, He S. An Improved Method for Calculating Paleoheat Flow from Vitrinite Reflectance Profile. Journal of Earth Sciences, 2001, 12(4): 337-342.

[25] Waples D W. Time and Temperature in Petroleum Formation: Application of Lopatin’s Method to Petroleum Exploration. AAPG Bulletin, 1980, 64(6): 916-926.

[26] Waples D W. Duppenbecker S J, Iliffe J E. Basin Modelling: How well have We done?. Basin Modelling: Practice and Progress, 1998 London: Geological Society, 1-14.

[27] Waples D W, Kamata H, Suizu M. The Art of Maturity Modeling Part 1: Finding a Satisfactory Geologic Model. AAPG Bulletin, 1992, 76(1): 31-46.

[28] Waples D W, Suizu M, Kamata H. The Art of Maturity Modeling. Part 2: Alternative Models and Sensitivity Analysis. AAPG Bulletin, 1992, 76(1): 47-66.

[29] Xie X N, Müller R D, Li S T, . Origin of Anomalous Subsidence along the Northern South China Sea Margin and Its Relationship to Dynamic Topography. Marine and Petroleum Geology, 2006, 23: 745-765.

[30] Zhou J X, Huang Z L, Bao G P, . Sources and Thermo-Chemical Sulfate Reduction for Reduced Sulfur in the Hydrothermal Fluids, Southeastern SYG Pb-Zn Metallogenic Province, SW China. Journal of Earth Science, 2013, 24(4): 759-771.