High temperature oxidation is the main reaction type and energy source of the combustion front during in-situ combustion development of heavy oils. High temperature oxidation of heavy oils was studied by thermogravimetry, and influences of sample preparation methods (pure oils or oils mixed with SiO2) and kinetic parameter determination methods (Coats-Redfern integration, ABSW differentiation and FWO iso-conversion) on measured results of kinetic parameters were evaluated. The results showed that the combustion of pure oil samples is uneven, while for oils mixed with SiO2, pore spaces among SiO2 particles can provide O2 with diffusion channels, resulting in an even reaction in combustion. Therefore, the kinetic analysis experiment is effective due to the even combustion of samples. When kinetic parameters for high temperature oxidation of heavy oils are derived from thermogravimetric curves, there exist certain errors in kinetic parameters fitted by a single scanning-rate method (Coats-Redfern integration and ABSW differentiation). Whereas FWO iso-conversional method can avoid errors derived from simplified hypothetic mechanism functions, thus the method, capable of being applied to intrinsic kinetics researches of oil-coke combustion, can provide accurate kinetic parameters for the in-situ combustion development of heavy, ultra-heavy and extra-heavy oils.
王元基,何江川,廖广志,等.国内火驱技术发展历程与应用前景[J].石油学报,2012,33(5):909-914.Wang Yuanji,He Jiangchuan,Liao Guangzhi,et al.Overview on the development history of combustion drive and its application prospect in China[J].Acta Petrolei Sinica,2012,33(5):909-914.
[2]
何江川,廖广志,王正茂.油田开发战略与接替技术[J].石油学报,2012,33(3):519-525.He Jiangchuan,Liao Guangzhi,Wang Zhengmao.Oilfield development strategy and replacement techniques[J].Acta Petrolei Sinica,2012,33(3):519-525.
[3]
王艳辉,陈亚平,李少池.火烧驱油特征的实验研究[J].石油勘探与开发,2000,27(1):69-71.Wang Yanhui,Chen Yaping,Li Shaochi.Experiment study on oil displacement by in-situ combustion[J].Petroleum Exploration and Development,2000,27(1):69-71.
[4]
关文龙,席长丰,陈亚平,等.稠油油藏注蒸汽开发后期转火驱技术[J].石油勘探与开发,2011,38(4):19-20.Guan Wenlong,Xi Changfeng,Chen Yaping,et al.Fire-flooding technologies in post-steam-injected heavy oil reservoirs[J].Petroleum Exploration and Development,2011,38(4):19-20.
[5]
Moore R G,Mehta S A,Ursenbach M G.A guide to high pressure air injection(HPAI)based oil recovery[R].SPE 75207,2002.
[6]
Ursenbach M G,Moore R G,Mehta S A.Air injection in heavy oil reservoirs:a process whose time has come(again)[J].Journal of Canadian Petroleum Technology,2010,49(1):46-54.
[7]
崔玉峰,杨德伟,陈玉丽,等.火烧油层热力采油过程的数值模拟[J].石油学报,2004,25(5):99-103.Cui Yufeng,Yang Dewei,Chen Yuli,et al.Numerical simulation of thermal flooding process of in-situ combustion[J].Acta Petrolei Sinica,2004,25(5):99-103.
[8]
Sarma H K,Yazawa N,Moore R G,et al.Screening of three light-oil reservoirs for application of air injection process by accelerating rate calorimetric and TG/PDSC tests[J].Journal of Canadian Petroleum Technology,2002,41(3):50-61.
[9]
杜建芬,郭平,王仲林,等.轻质油藏高压注空气加速量热分析实验研究[J].西南石油大学学报,2007,29(2):17-21.Du Jianfen,Guo Ping,Wang Zhonglin,et al.Laboratory research of accelerating rate calorimeter test of high-pressure air injection at light oil reservoirs[J].Journal of Southwest Petroleum University,2007,29(2):17-21.
[10]
Cinar M,Castanier L M,Kovscek A R.Improved analysis of the kinetics of crude-oil in-situ combustion[R].SPE 113948,2008.
[11]
Gréaves M,Ren S R,Xia T X.New air injection technology for IOR operations in light and heavy oil reservoirs[R].SPE 57295,1999.
[12]
Li J,Mehta S A,Moore R G,et al.Investigation of the oxidation behaviour of pure hydrocarbon components and crude oils utilizing PDSC thermal technique[J].Journal of Canadian Petroleum Technology, 2006, 45(1):48-53.
[13]
Vossoughi S,El-Shoubary Y.Kinetics of crude-oil coke combustion[R].SPE 16268,1989.
[14]
Kök M V,Acar C.Kinetics of crude oil combustion[J].Journal of Thermal Analysis and Calorimetry,2006,83(2):445-449.
[15]
Kök M V.Use of thermal equipment to evaluate crude oils[J].Thermochimica Acta,1993,214(2):315-324.
[16]
Vossoughi S,Bartlett G W,Willhite G P.Development of a kinetic model for in-situ combustion and prediction of the process variables using TGA/DSC techniques[R].SPE 11073,1982.
[17]
Song Q,He B L,Yao Q,et al.Influence of diffusion on thermogravimetric analysis of carbon black oxidation[J].Energy & Fuels,2006,20(5):1895-1900.
[18]
Bousaid I S,Ramey H J Jr.Oxidation of crude oil in porous media[J].SPE Journal,1968,8(2):137-148.
[19]
Dabbous M K,Fulton P F.Low-temperature-oxidation reaction kinetics and effects on the in-situ combustion process[J].SPE Journal,1974,14(3):253-262.
[20]
Fassihi M R,Ramey H J Jr,Brigham W E.The frontal behavior of in-situ combustion[R].SPE 8907,1980.
[21]
Tang J S,Song Q,He B L,et al.Oxidation behavior of a kind of carbon black[J].Science in China Series E:Technological Sciences,2009,52(6):1535-1542.
[22]
Thomas F B,Moore R G,Bennion D W.Kinetic parameters for the high-temperature oxidation of in-situ combustion coke[J].Journal of Canadian Petroleum Technology,1985,24(6):60-67.