近绝热条件下稠油低温氧化热效应研究

doi:10.13809/j.cnki.cn32-1825/te.2020.06.017

Abstract

Abstract:

The influences of temperature, quartz sand, detritus and specific surface area of medium on thermal release caused by low-temperature oxidation of heavy crude oil of Jiqi Oilfield have been investigated by self-designed high-temperature and high-pressure heat tracking compensation equipment. The results show that the temperature is the significant factor regarding heat release induced by low-temperature oxidation of heavy crude oil. As the initial temperature increases, the increase in capability of oxygen consumption and heat liberated as well as the reduction in pressure. When the initial temperature is 160 ℃, the temperature is improved by 10.7 ℃ in the first 26 hours coupled with the pressure reduction of 2.26 MPa and 2.5 % of effluent oxygen concentration, showing obvious thermal effect caused by low-temperature oxidation of heavy crude oil. Both the increment in the specific surface area and the addition of quartz sand and detritus can promote the thermal release induced by low- temperature oxidation of heavy oil, thereinto, the specific surface effect of medium gives a small contribution to the thermal release of low-temperature oxidation.

Key words: quasi-adiabatic conditions, heavy crude oil, low-temperature oxidation, thermal effect, specific surface area, quartz sand

CLC Number:

TE345

PAN Jingjun,PU Wanfen,ZHAO Shuai,KANNI Zhati,WANG Ruyan,Li Yibo,WAN Zheng,GU Fei. Thermal effect caused by low-temperature oxidation of heavy crude oil under quasi-adiabatic condition[J].Reservoir Evaluation and Development, 2020, 10(6): 110-114.

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References 17

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黏度（40 ^oC）/ （mPa·s）	密度（40 ^oC）/ （g·cm^-3）	四组分/%
黏度（40 ^oC）/ （mPa·s）	密度（40 ^oC）/ （g·cm^-3）	饱和烃	芳香烃	胶质	沥青质
17 418	0.943 5	28.09	31.45	32.86	7.60

反应样品	初期温度/℃	产出气分析/%
反应样品	初期温度/℃	O₂	N₂	（CO₂+CO）	（C₁-C₆）
油样油样油样	40	19.5	79.9	0	0
	80	17.9	81.7	0.1	0.2
	160	2.5	87.2	7.8	2.4
油样+石英砂（70~80目）	160	2.2	87.0	8.3	2.6
油样+石英砂（150~160目）	160	1.9	87.2	8.4	2.5
油样+岩屑（150~160目）	160	0.9	87.1	9.3	2.7

Thermal effect caused by low-temperature oxidation of heavy crude oil under quasi-adiabatic condition

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