储气库油侵气窜压差界限研究
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摘要
针对储气库开采过程中油侵气窜的问题,以喇嘛甸北部为研究对象,对储气库油气界面的运移进行监测,分别通过物理模拟方法和数值模拟方法研究油侵气窜与油气区压差的关系,进而得到生产过程中油区气区之间的合理压差.物理模拟研究表明,当油气区压差超过一定值时,油气界面会发生运移,压差越大,油气界面运移距离越远;数值模拟研究表明,储气库油侵气窜压差界限为±0.5MPa;通过矿场监测论证,最终确认上述压差界限的合理性.
This article aims at studying the problem of oil cutting and gas channeling in the process of gas storage development, the north part of Lamadian is taken as the object of study to monitor the oil-gas interface migration, the relationship between oil cutting and differential pressure of oil-gas regions is studied by means of physical simulation method and numerical simulation method, the research methods of gas channeling are the same as those mentioned above. Then the reasonable differential pressure between oil and gas in production process is obtained. The physical simulation research shows that when the differential pressure betwen oil and gas exceeds a certain value, the oil-gas interface begins to migrate. The greater the differential pressure is, the farther the the oil-gas interface migration distance is. The numerical simulation shows that the differential pressure limit between oil and gas of oil cutting or gas channeling is ± 0.5 Mpa. The rationality of the above differential pressure limits is finally confirmed through field monitoring and demonstration.
This article aims at studying the problem of oil cutting and gas channeling in the process of gas storage development, the north part of Lamadian is taken as the object of study to monitor the oil-gas interface migration, the relationship between oil cutting and differential pressure of oil-gas regions is studied by means of physical simulation method and numerical simulation method, the research methods of gas channeling are the same as those mentioned above. Then the reasonable differential pressure between oil and gas in production process is obtained. The physical simulation research shows that when the differential pressure betwen oil and gas exceeds a certain value, the oil-gas interface begins to migrate. The greater the differential pressure is, the farther the the oil-gas interface migration distance is. The numerical simulation shows that the differential pressure limit between oil and gas of oil cutting or gas channeling is ± 0.5 Mpa. The rationality of the above differential pressure limits is finally confirmed through field monitoring and demonstration.
引文
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[7]吕建,罗长斌,付江龙,李治,汤敬.长庆储气库合理注气压力的确定[J].石油化工应用,2014,33(9):46-50.
[8]王皆明,姜凤光.砂岩油藏改建地下储气库注气能力预测方法[J].天然气地球科学,2008,19(5):727-729.
[9]姜凤光,王皆明.地下储气库注采动态预测模型[J].天然气工业,2009,29(2):108-110,145.
[10]赵斌,李云鹏,田静,王芝银.含水层储气库注采效应的数值模拟[J].油气储运,2012,31(3):211-214,218,247.
[11]罗天雨,麻慧博,艾尼瓦尔,吕毓刚.呼图壁储气库合理生产压差数值分析[J].中外能源,2011(6):43-46.
[12]许珍萍,蒋建勋,葛静涛,张立勤,陈.枯竭气藏型地下储气库的注采动态数值模拟[J].天然气勘探与开发.2011,34(4):53-55,59,99-100.
[13]谭羽飞,廉乐明,严铭卿.国外天然气地下储气库的数值模拟研究[J].天然气工业,1998,18(6):93-94.
[14]王丽娟,王皆明,耿晶.含水层储气库建库注气驱动机理数值模拟研究[J].天然气地球科学,2005,16(5):673-676.
[15]喻莲,赵文琪,陈礼,王桐.凝析气顶油藏复杂气窜问题研究[J].特种油气藏,2013,20(4):110-112,156.