Thermal behavior and kinetics of heavy crude oil during combustion by high pressure differential scanning calorimetry and accelerating rate calorimetry

被引:34
作者
Zhao, Shuai [1 ]
Pu, Wanfen [1 ,2 ]
Varfolomeev, Mikhail A. [1 ,2 ]
Yuan, Chengdong [1 ,2 ]
Qin, Shan [3 ]
Wang, Liangliang [1 ]
Emelianov, Dmitrii A. [2 ]
Khachatrian, Artashes A. [2 ]
机构
[1] Southwest Petr Univ, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610500, Sichuan, Peoples R China
[2] Kazan Fed Univ, Kremlevskaya Str 18, Kazan 420008, Russia
[3] PetroChina Southwest Oil & Gas Field Co, Engn Technol Res Inst, Chengdu 610000, Sichuan, Peoples R China
基金
中国国家自然科学基金;
关键词
In-situ combustion; Thermal behavior; Kinetics; Heavy crude oil; High pressure differential scanning calorimetry; Accelerating rate calorimetry; IN-SITU COMBUSTION; LOW-TEMPERATURE OXIDATION; AIR INJECTION; PYROLYSIS; LIGHT; DSC; COMPONENTS; MECHANISM; EVOLUTION; VISCOSITY;
D O I
10.1016/j.petrol.2019.106225
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Because the thermal release correlates directly with the success of in-situ combustion (ISC) technology, this research performs a series of investigations concerning thermal behavior and kinetics of heavy crude oil during combustion using high pressure differential scanning calorimetry (HP-DSC) and accelerating rate calorimetry (ARC). The results obtained from HP-DSC profiles indicated that for oil alone and its mixtures with quartz sand/crushed core, the peak temperature was lowered, and the heat flow increased with increasing oxygen partial pressure. The heat enthalpy of low temperature oxidation (LTO) was higher than that of high temperature oxidation (HTO) under oxygen partial pressures of 0.5, 1 and 1.5 MPa, and the increase in heat enthalpy of LTO with oxygen partial pressure was more pronounced than that of HTO. Unlike the crushed core, the addition of quartz sand delayed exothermic oxidation reactions. Compared with oil only and oil + quartz sand, the LTO and HTO peak temperatures of oil + crushed core were considerably lowered, and the effect of crushed core on increasing heat release for LTO at oxygen partial pressure of 1.5 MPa was more prominent. It was observed that the heat enthalpy of LTO and HTO increased quasi-linearly with the oxygen partial pressure in both the presence and absence of quartz sand/crushed core. ISC might be considered as an appropriate candidate for Jiqi block, based on exothermic continuity of the ARC curves, with the near-wellbore zone of target block heated to 180 degrees C where the exothermic oxidation activity is notably intensified. The kinetic results showed that the LTO and HTO intervals were divided into 6 and 2 subintervals, respectively, which facilitated more precise modelling of the ISC process.
引用
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页数:8
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