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沈阳高凝油田已进入中高含水期,油井含水上升,液面降低,初期的开式热油循环水力活塞泵采油工艺、闭式热水循环采油工艺已不适应开发需要,开始逐步转换为空心杆热线采油和电伴热油管采油,但电伴热开采方式所产生的高能耗严重制约了油田的快速发展,采取加药等措施实现了部分油井的冷采,且取得一定成效。室内研究与现场试验表明:电伴热采油与冷采的界定标准是井口出液温度高于37℃,日产液高于30t/d,含水大于90%;采用真空隔热油管可以提高油井井口出液温度7.23~12.26℃,随着真空隔热油管下深增加,井口出液温度提高幅度越来越小;采用真空隔热油管,当油井日产液超过12t/d、含水超过90%时,可实现保温冷抽生产,证实了采用管柱保温方式替代高凝油电伴热生产工艺解决高凝油电伴热高能耗问题的可行性。
Shenyang high condensate oil field has entered the high water cut period, oil well water cut, the liquid level decreases, the initial open hot oil circulating hydraulic piston pump oil production technology, closed hot water recycling oil production technology has been adapted to the development needs, and gradually converted to hollow rod Hot oil production and electric heating oil pipe production. However, the high energy consumption caused by electric heat tracing has seriously hampered the rapid development of oilfields. Some measures such as drug dosing were adopted to achieve cold recovery of some oil wells and achieved some success. Laboratory studies and field tests show that the standard of electric heat tracing oil production and cold mining is that the outlet temperature of the wellhead is higher than 37 ℃, the daily production rate is higher than 30t / d and the water content is more than 90%. The vacuum insulated oil pipe can increase the wellhead outlet The liquid temperature is 7.23 ~ 12.26 ℃. With the increase of the temperature under the vacuum insulated oil pipe, the temperature increase of the liquid outlet in the well head becomes smaller and smaller. When vacuum oil pipe is used, when the daily production liquid of the well exceeds 12t / d and the water content exceeds 90% To achieve the production of insulation cold pumping, confirmed the use of column insulation instead of high condensate electric heat production process to solve the problem of high condensate heating with high energy consumption feasibility.