伊朗Y油田沥青质沉淀分析及预测
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摘要
采用固相沉淀测试系统针对伊朗Y油田原油进行沥青质沉淀实验,确定沥青质发生沉淀的热力学条件,通过相态模拟方法预测沥青质沉淀包络线图。根据井筒中的温度和压力剖面,分析不同生产参数下沥青质在井筒中沉淀的规律。当压力高于沥青沉淀初始压力时不会发生沉淀,当压力低于沥青沉淀初始压力而高于泡点压力时,沥青质沉淀随压力降低而增多;随着原油产量的升高,沥青质在井筒中的初始沉淀点逐渐向井底移动,沉淀区间长度先加大然后逐渐减小。
Solid detection system was adopted to detect Asphaltene precipitation regularity,then asphaltene precipitation envelop curve was obtained according to phase behavior simulation. This paper also analyzed the precipitation behavior along wellbore in different production parameters,according to the pressure and temperature profiles. The result shows that the occurrence of asphaltene precipitation corresponds to AOP( asphaltene onset pressure). Thus,precipitation does not occur when the pressure is higher than AOP,while the precipitation increases with pressure reduction when the pressure is higher than bubble point and less than AOP. The location of asphaltene onset precipitation goes down along wellbore as production increases,the length of precipitation interval increases first and then decreases accordingly.
Solid detection system was adopted to detect Asphaltene precipitation regularity,then asphaltene precipitation envelop curve was obtained according to phase behavior simulation. This paper also analyzed the precipitation behavior along wellbore in different production parameters,according to the pressure and temperature profiles. The result shows that the occurrence of asphaltene precipitation corresponds to AOP( asphaltene onset pressure). Thus,precipitation does not occur when the pressure is higher than AOP,while the precipitation increases with pressure reduction when the pressure is higher than bubble point and less than AOP. The location of asphaltene onset precipitation goes down along wellbore as production increases,the length of precipitation interval increases first and then decreases accordingly.
引文
[1]张磊,李传,阙国和.石油沥青质的吸附行为:I吸附机理及研究方法[J].石油沥青,2007,21(5):23-28.
[2]杨照,郭天民.沥青质沉淀研究进展综述[J].石油勘探与开发,1997,24(5):98-103
[3]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[J].石油勘探与开发,2000,27(5):109-112
[4]MANSOORI G A.Modeling of Asphaltene and Other Heavy Organic Depositions[J].Journal of Petroleum Science and Engineering,1997(17):101-111.
[5]VICTOROV A I,FIROOZABADI A.Thermodynamic Micellization Model of Asphaltene Precipitation From Petroleum Fluids[J].AICh E Journal,1996,42(6):1753-1764.
[6]ANDREW Y,RALPH Y.Evaluating Asphaltene Inhibitors:Laboratory Tests and Field Studies[G].SPE 65376,2001:3-6.
[7]何延龙,余跃慧,蒲春生,等.伊朗北阿扎德干油田沥青质沉积特征[J].西安石油大学学报(自然科学版),2014,29(2):1-7.
[8]TAKHAR S,RAVENSCROFT P D,NICOLL D C A.Prediction of Asphaltene Deposition During Production-Model Description and Experimental Details[G].SPE 30108,1995:311-316.
[9]JAMALUDDIN T W,NAZARKO S S,et al.Deasphalted Oil-A Natural Asphaltene Solvent[G].SPE28994,1995,513-522.
[10]SOLTANI S B,RASHTCHIAN D,TOHIDI B,et al.A Novel Method for Mitigation of Asphaltene Deposition in the Wellstring[J].Iran J Chem Eng,2010,29(2):131-142.
[11]钱坤,杨胜来,刘盼.原油沥青质初始沉淀压力测定与模型计算[J].断块油气田,2014,21(6):775-778.
[2]杨照,郭天民.沥青质沉淀研究进展综述[J].石油勘探与开发,1997,24(5):98-103
[3]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[J].石油勘探与开发,2000,27(5):109-112
[4]MANSOORI G A.Modeling of Asphaltene and Other Heavy Organic Depositions[J].Journal of Petroleum Science and Engineering,1997(17):101-111.
[5]VICTOROV A I,FIROOZABADI A.Thermodynamic Micellization Model of Asphaltene Precipitation From Petroleum Fluids[J].AICh E Journal,1996,42(6):1753-1764.
[6]ANDREW Y,RALPH Y.Evaluating Asphaltene Inhibitors:Laboratory Tests and Field Studies[G].SPE 65376,2001:3-6.
[7]何延龙,余跃慧,蒲春生,等.伊朗北阿扎德干油田沥青质沉积特征[J].西安石油大学学报(自然科学版),2014,29(2):1-7.
[8]TAKHAR S,RAVENSCROFT P D,NICOLL D C A.Prediction of Asphaltene Deposition During Production-Model Description and Experimental Details[G].SPE 30108,1995:311-316.
[9]JAMALUDDIN T W,NAZARKO S S,et al.Deasphalted Oil-A Natural Asphaltene Solvent[G].SPE28994,1995,513-522.
[10]SOLTANI S B,RASHTCHIAN D,TOHIDI B,et al.A Novel Method for Mitigation of Asphaltene Deposition in the Wellstring[J].Iran J Chem Eng,2010,29(2):131-142.
[11]钱坤,杨胜来,刘盼.原油沥青质初始沉淀压力测定与模型计算[J].断块油气田,2014,21(6):775-778.