油井堵塞物成分及析出位置——以哈6区块为例
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摘要
油井开采过程中井筒内的沉积堵塞物是制约油井正常生产,甚至停产的主要原因。为弄清哈拉哈塘油田油井堵塞物的主要成分并对堵塞物的形成位置以及沉积速度进行预测,利用红外光谱、DSC分析仪以及扫描电镜对堵塞物的化学组成、有机物类型以及微观形态进行分析,并建立了适用于描述堵塞物沉积的动态预测模型。结果表明,该区块主要是因蜡的沉积形成的堵塞物,蜡的熔点为71℃,并且建立的动态预测模型与现场实际情况的适配性较好。
In the process of oil well production,the sedimentary blockage in the wellbore will restrict the normal production of oil wells,even the phenomenon of production reduction and well shutdown appear. In order to clarify the main components of blockages of Halahatang Oilfield and forecast the position and the deposition rate of blockage,the chemical composition,the type of organic matter and the microscopic morphology of the sediments were analyzed by infrared spectroscopy,DSC analyzer and scanning electron microscope,and a dynamic prediction model was established to describe the deposition of the plug. The results show that the main block is blocked by the deposition of wax,and the melting point of the wax is 71 ℃. The adaptation of the dynamic prediction model to the actual situation of the field is good.
In the process of oil well production,the sedimentary blockage in the wellbore will restrict the normal production of oil wells,even the phenomenon of production reduction and well shutdown appear. In order to clarify the main components of blockages of Halahatang Oilfield and forecast the position and the deposition rate of blockage,the chemical composition,the type of organic matter and the microscopic morphology of the sediments were analyzed by infrared spectroscopy,DSC analyzer and scanning electron microscope,and a dynamic prediction model was established to describe the deposition of the plug. The results show that the main block is blocked by the deposition of wax,and the melting point of the wax is 71 ℃. The adaptation of the dynamic prediction model to the actual situation of the field is good.
引文
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[3]廖碧朝,宋永芳,梁顺武,等.含硫化氢气井井筒堵塞解堵对策研究[J].油气井测试,2015,24(6):62-64.
[4] Kang P S,Lee D G,Lim J S. Status of wax mitigation technologies in offshore oil production[C]//The Twenty-fourth International Ocean and Polar Engineering Conference. International Society of Offshore and Polar Engineers,2014.
[5]郭东红,高金强,辛浩川,等.肯基亚克油田盐下油藏8010井井筒堵塞机理与解堵技术[J].特种油气藏,2008,15(1):80-83.
[6] Bilyeu D J,Chen T X. Clearing hydrate and wax blockages in a subsea flowline[C]//Offshore Technology Conference.Offshore Technology Conference,2005.
[7]张耀刚,吴新民,梁铭,等.气井井筒有机解堵工艺技术的应用[J].天然气工业,2009,29(2):95-97.
[8]康志江,黄咏梅,易斌,等.塔河缝洞油藏沥青质堵塞物原因分析[J].石油地质与工程,2008,22(6):91-93.
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[13] Semenov A A. Wax Deposition Forecast[C]//North Africa Technical Conference and Exhibition. Society of Petroleum Engineers,2012.