原油沥青质初始沉淀压力实验测定研究
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摘要
原油温度、压力的改变均会引起原油中沥青质沉淀,造成储层伤害和井筒堵塞。采用自主研发的固相沥青质激光探测装置,通过透光率法探测伊朗南阿油田典型井原油样品在不同温度下的沥青质初始沉淀压力,从而确定沥青质发生沉淀的热力学条件,绘制出沥青质沉淀相包络线。结果表明,该油田油样在44℃、80℃、113℃下的沥青质沉淀点分别为42.8 MPa、39.7 MPa和35.2 MPa,原油沥青质初始沉淀压力随着温度的升高而降低;并且在井筒温度范围内呈线性关系。结合取样井井筒温度压力曲线预测出井筒中沥青质出现沉淀的深度为1 600~1 800 m,对于油田预防沥青质沉淀有极其重要的意义。
Changes in temperature and pressure will causes asphaltene precipitation and deposition,which damages reservoir and plugs wellbore. Solid detection system independently designed by laboratory was used to investigate asphaltene precipitation with light-scattering technique using NIR. Saturation phase envelope and asphaltene deposition envelope were obtained. The results showed that the asphaltene onset pressure under different temperature of 44 ℃,80 ℃ and 113 ℃ were 42. 8 MPa,39. 7 MPa and 35. 2 MPa and there was a linear relationship between the asphaltene onset pressure and the temperature. The depth where asphaltene would deposit in the wellbore could be predicted by using asphaltene deposition envelope and wellbore temperature and pressure curve,which was important for oil field to prevent and remove asphaltene deposition.
Changes in temperature and pressure will causes asphaltene precipitation and deposition,which damages reservoir and plugs wellbore. Solid detection system independently designed by laboratory was used to investigate asphaltene precipitation with light-scattering technique using NIR. Saturation phase envelope and asphaltene deposition envelope were obtained. The results showed that the asphaltene onset pressure under different temperature of 44 ℃,80 ℃ and 113 ℃ were 42. 8 MPa,39. 7 MPa and 35. 2 MPa and there was a linear relationship between the asphaltene onset pressure and the temperature. The depth where asphaltene would deposit in the wellbore could be predicted by using asphaltene deposition envelope and wellbore temperature and pressure curve,which was important for oil field to prevent and remove asphaltene deposition.
引文
1 Leontaritis K J.Asphaltene deposition:a comprehensive description of problem manifestations and modeling approaches.SPE Production Operations Symposium,Society of Petroleum Engineers,1989
2 Leontaritis K J A.Systematic approach for the prevention and treatment of formation damage caused by asphaltene deposition.SPE23810,1992
3 Del Carmen Garcia M,Magaly H,Jose O.Asphaltene deposition prediction and control in a Venezuelan North Monagas Oil Field.International Symposium on Oilfield Chemistry,Society of Petroleum Engineers,2003
4 胡玉峰,杨兰英,林雄森,等.原油正构烷烃沥青质聚沉机理研究及沉淀量测定.石油勘探与开发,2000;27(5):109—114Hu Yufeng,Yang Lanying,Lin Xiongsen,et al.N-alkane asphaltene precipitation and the mechanism of their formation.Petroleum Exploration and Development,2000;27(5):109—114
5 Jamaluddin A K M,Creek J,Kabir C S,et al.Laboratory techniques to measure thermodynamic asphaltene instability.Journal of Canadian Petroleum Technology,2002;41(07):
6 Zhou Y,Sarma H K.Asphaltene precipitation behavior during gas injection in a UAE carbonate reservoir and a faster experimental strategy to predict asphaltene onset pressure.Abu Dhabi International Petroleum Conference and Exhibition.Society of Petroleum Engineers,2012
7 Burke N E,Hobbs R E,Kashou S F.Measurement and modeling of asphaltene precipitation(includes associated paper 23831).Journal of Petroleum Technology,1990;42(11):1440—1446
8 Pellen F,Olivard P,Guern Y,et al.Radar modulation on optical carrier for target detection in sea-water.Lasers and Electro-Optics Europe,2000 Conference on,IEEE,2000:1
9 Joshi N B,Mullins O C,Jamaluddin A,et al.Asphaltene precipitation from live crude oil.Energy&Fuels,2001;15(4):979—986
10 Roshanaei Zadeh G A,Moradi S,Dabir B,et al.Comprehensive study of asphaltene precipitation due to gas injection:experimental investigation and modeling.SPE Enhanced Oil Recovery Conference,Society of Petroleum Engineers,2011
11 Hamid K.Determination of the zone of maximum probability of asphaltenes precipitation utilizing experimental data in an Iranian Carbonate Reservoir.Canadian International Petroleum Conference,Petroleum Society of Canada,2005
2 Leontaritis K J A.Systematic approach for the prevention and treatment of formation damage caused by asphaltene deposition.SPE23810,1992
3 Del Carmen Garcia M,Magaly H,Jose O.Asphaltene deposition prediction and control in a Venezuelan North Monagas Oil Field.International Symposium on Oilfield Chemistry,Society of Petroleum Engineers,2003
4 胡玉峰,杨兰英,林雄森,等.原油正构烷烃沥青质聚沉机理研究及沉淀量测定.石油勘探与开发,2000;27(5):109—114Hu Yufeng,Yang Lanying,Lin Xiongsen,et al.N-alkane asphaltene precipitation and the mechanism of their formation.Petroleum Exploration and Development,2000;27(5):109—114
5 Jamaluddin A K M,Creek J,Kabir C S,et al.Laboratory techniques to measure thermodynamic asphaltene instability.Journal of Canadian Petroleum Technology,2002;41(07):
6 Zhou Y,Sarma H K.Asphaltene precipitation behavior during gas injection in a UAE carbonate reservoir and a faster experimental strategy to predict asphaltene onset pressure.Abu Dhabi International Petroleum Conference and Exhibition.Society of Petroleum Engineers,2012
7 Burke N E,Hobbs R E,Kashou S F.Measurement and modeling of asphaltene precipitation(includes associated paper 23831).Journal of Petroleum Technology,1990;42(11):1440—1446
8 Pellen F,Olivard P,Guern Y,et al.Radar modulation on optical carrier for target detection in sea-water.Lasers and Electro-Optics Europe,2000 Conference on,IEEE,2000:1
9 Joshi N B,Mullins O C,Jamaluddin A,et al.Asphaltene precipitation from live crude oil.Energy&Fuels,2001;15(4):979—986
10 Roshanaei Zadeh G A,Moradi S,Dabir B,et al.Comprehensive study of asphaltene precipitation due to gas injection:experimental investigation and modeling.SPE Enhanced Oil Recovery Conference,Society of Petroleum Engineers,2011
11 Hamid K.Determination of the zone of maximum probability of asphaltenes precipitation utilizing experimental data in an Iranian Carbonate Reservoir.Canadian International Petroleum Conference,Petroleum Society of Canada,2005