轻质油藏注空气氧化特性及动力学研究

Abstract

Abstract:

In this artide, we analyse the oil oxidation characteristics of the light oil at different oxygen concentrations(21 % and 8 %) and in the presence of the reservoir rock by the static oil oxidation tube and thermogravimetry/derivative thermogravimetry(TG/DTG). According to the Arrhenius oxidation kinetics model, the influence of the factors on crude oil oxidation activity is characterized quantitatively. The results show that the lower oxygen concentration can reduce the oxidation reaction rate, and in addition, the reservoir rock has strong catalytic impacts on oil oxidation, which can promote the oxidation reaction. The oxygen concentration of the remaining gas drops significantly after the oxidation in a lower oxygen concentration, which greatly improve the safety of air injection displacement. The thermal analysis shows that the crude oil exhibits three stages of low temperature oxidation, fuel deposition and high temperature oxidation. The positive impact of cuttings on the crude oil oxidation is stronger than the negative impact of the lower oxygen concentration, which can significantly reduce the activation energy of crude oil at low oxygen environment. It is benefit to the application of lean oxygen injection displacement.

Key words: light oil, oxidation characteristic, oxygen concentration, reservoir rock, oxidation kinetics

CLC Number:

TE357.7

Pu Wanfen,Gu Fei,Song Ge,Liu Penggang,Liu Zhezhi. Research on oxidation characteristics and kinetics of light oil reservoir during the process of air injection[J].Reservoir Evaluation and Development, 2018, 8(2): 35-40.

Figures/Tables 7

Table 1

Fig. 1

Table 2

Fig. 2

Table 3

Fig. 3

Table 4

References 15

[1]	张旭, 刘建仪, 孙良田 , 等. 注空气低温氧化提高轻质油气藏采收率研究[J]. 天然气工业, 2004,24(4):78-80.
[2]	于洪敏, 任韶然, 王杰祥 , 等. 胜利油田注空气提高采收率数模研究[J]. 石油钻采工艺, 2008,30(3):105-109.
[3]	Ni J H, Jia H, Pu W F , et al. Thermal kinetics study of light oil oxidation using TG/DTG techniques[J]. Journal of Thermal Analysis and Calorimetry, 2014,117(3):1349-1355. doi: 10.1007/s10973-014-3854-8
[4]	赵琦宁 . 黏土矿物对空气驱氧化特性的影响[D]. 成都:西南石油大学, 2014.
[5]	Hassan A, Carbognani L, Pereira-Almao P . Effect of O₂ on microcarbon residue standards analysis[J]. Energy Fuels, 2008,22(6):4062-4069. doi: 10.1021/ef800571m
[6]	Zhang Y, Sheng J J . Oxidation kinetics of Wolfcamp light oil[J]. Liquid Fuels Technology, 2016,34(13):1180-1186. doi: 10.1080/10916466.2016.1190753
[7]	Bagci S . Effect of clay content on combustion reaction parameters[J]. Energy Sources, 2005,27(6):579-588. doi: 10.1080/00908310490450485
[8]	李一波, 蒲万芬, 王爱香 , 等. 轻质油藏注空气低温高压氧化实验研究[J]. 石油钻采工艺, 2012,34(6):90-92.
[9]	袁成东, 蒲万芬, 郭正 , 等. 轻质和重质原油氧化特性及其动力学[J]. 化学工程, 2014,42(8):56-59. doi: 10.3969/j.issn.1005-9954.2014.08.012
[10]	Hassan A, Carbognani L, Pereira-Almao P . Oxidation of oils and bitumen at various O₂ concentrations[J]. Energy and Fuels, 2010,24(10):5378-5386. doi: 10.1021/ef100791g
[11]	Jia H, Zhao J Z, Pu W F , et al. Thermal study on light crude oil for application of high-pressure air injection(HPAI) process by TG/DTG and DTA tests[J]. Energy and Fuels, 2012,26(3):1575-1584. doi: 10.1021/ef201770t
[12]	刘鹏刚, 蒲万芬, 贾虎 , 等. 岩屑存在下油藏注空气原油的氧化热解分析[J]. 燃烧科学与技术, 2015,21(5):464-470. doi: 10.11715/rskxjs.R201411030
[13]	Kök M V . Thermo-oxidative reactions of crude oils[J]. Journal of Thermal Analysis and Calorimetry, 2011,105(2):411-414. doi: 10.1007/s10973-010-1117-x
[14]	Greves M, Osinder A, Rathbone R R . Influence of reservoir rock and fluids on crude oil oxidation using an accelerating rate calorimeter[J]. Chemical Engineering Research and Design, 2000,78(5):715-720. doi: 10.1205/026387600527897
[15]	Kök M V, Gundogar A S . Effect of different clay concentrations on crude oil combustion kinetics by thermogravimetry[J]. Journal of Thermal Analysis and Calorimetry, 2010,99(3):779-783. doi: 10.1007/s10973-009-0377-9

样品	黏土矿物质量分数	其他矿物质量分数
样品	黏土矿物质量分数	石英	钾长石	斜长石	方解石	白云岩
岩石颗粒	10.74	38.81	6.59	36.27	2.86	4.73

样品	初始压力/MPa	最终压力/MPa	温度/℃	气相组成,%				耗氧速率/(%·d^-1)
样品	初始压力/MPa	最终压力/MPa	温度/℃	O₂	N₂	CO₂	CO	耗氧速率/(%·d^-1)
原油+空气	40.19	36.46	102	14.31	84.6	0.85	0.05	0.669
原油+空气+岩石颗粒	40.38	34.87	102	12.82	84.89	1.12	0	0.818
原油+贫氧空气	40.11	37.96	102	6.89	92.71	0.26	0.03	0.111
原油+贫氧空气+岩石颗粒	40.24	36.56	102	4.93	93.66	0.813	0.04	0.307

样品	低温氧化(LTO)			燃料沉积(FD)		高温氧化(HTO)
样品	温度区间/℃	峰值温度/℃	质量损失,%	温度区间/℃	质量损失,%	温度区间/℃	峰值温度/℃	质量损失,%
原油	25~127	97	5.08	127~412	63.05	412~492	455	26.26
原油(含氧8 %)	25~112	92	4.89	112~412	71.72	412~497	459	18.12
原油+岩石颗粒	25~162	126	4.73	162~401	34.38	401~476	431	11.62
原油+岩石颗粒 (含氧8 %)	25~156	121	4.28	156~401	36.68	401~541	451	11.01

样品	线性拟合斜率		活化能 /(kJ·mol^-1)		阿伦纽斯常数 /min^-1
样品	LTO	HTO	LTO	HTO	LTO	HTO
原油	-3 346.26	-4 941.03	64.07	94.61	1.97×10⁷	1.70×10⁶
原油(含氧8 %)	-4 422.50	-5 352.90	84.68	102.49	1.59×10¹⁰	5.59×10⁶
原油+储层岩石	-1 799.76	-1 851.37	34.46	35.45	195.89	14.42
原油+储层岩石(含氧8 %)	-2 148.73	-2 298.37	41.14	57.41	2.95×10³	437.86

Research on oxidation characteristics and kinetics of light oil reservoir during the process of air injection

RichHTML

PDF (PC)

Like

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 7

References 15

Related Articles 1

Metrics

Comments

Recommended 10