油田注水井能耗评价方法与应用

doi:10.13809/j.cnki.cn32-1825/te.2020.05.014

摘要/Abstract

摘要：

为了找出能耗异常的注水井,对油田注水井进行能耗评价。基于能量守恒定律,建立了单泵单井模型,推导出单井输入功率与单井单位注水量电耗的线性关系式,并据此提出直线截距法和单耗节能率法,分别对注水系统和注水井进行能耗评价。利用我国西北地区A油田与东北地区B油田的部分注水系统数据进行了验证。结果表明,通过理论分析并结合现场数据可知,单井输入功率与单井单位注水量电耗存在线性关系,直线斜率和截距综合反映了注水系统以及注水井的能耗情况。利用直线截距法对注水系统进行评价,评价结果与传统的系统效率法基本吻合。利用单耗节能率法对注水井进行能耗评价,可找出能耗异常的注水井,结合现场实际情况,分析原因并采取相应的措施,从而提高注水系统效率。

关键词: 注水井, 能耗评价, 单泵单井模型, 直线截距法, 单耗节能率法

Abstract:

In order to find the injection wells with abnormal energy consumption, the energy consumption evaluation has been carried out for them. Based on the law of energy conservation, the model of single-pump corresponding to single-well is established, and the linear relationship between input power and power consumption per unit injection rate of single wells is deduced. Therefore, the straight line intercept method and the unit consumption energy saving rate method are put forward to evaluate the energy consumption of water injection systems and injection wells respectively. The results are verified by data from some water injection systems in oilfield-A in northwest and oilfield-B in northeast China. The results show that, according to theoretical analysis and field data, there is a linear relationship between the input power and the power consumption per unit of injection of a single well. The slope and intercept of straight line reflect the energy consumption of injection system and water injection well. The evaluation results of the injection system using the linear intercept method are basically consistent with the traditional system efficiency method. In addition, the evaluation of the energy consumption of injection wells by the unit consumption energy saving rate method can help to identify the injection wells with abnormal energy consumption. Combined with the actual situation on the site, the causes can be analyzed and the corresponding measures are taken to improve the efficiency of injection system.

Key words: injection well, energy consumption evaluation, single pump single well model, linear intercept method, unit consumption energy saving rate method

中图分类号:

TE357

邹永莉,邓志强,李同翔,贺三,刘航. 油田注水井能耗评价方法与应用[J]. 油气藏评价与开发, 2020, 10(5): 98-102.

ZOU Yongli,DENG Zhiqiang,LI Tongxiang,HE San,LIU Hang. Energy consumption evaluation method of oilfield injection wells and its application[J]. Reservoir Evaluation and Development, 2020, 10(5): 98-102.

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注水系统	注水系统效率/%	直线截距/（kW·h·m^-3）	传统系统效率法评价结果	直线截距法评价结果
注水系统A1	37.58	2.207	不合格	不合格
注水系统 A2	61.77	0.506	节能	合格
注水系统A3	40.95	1.573	合格	合格
注水系统 A4	53.39	0.232	节能	节能
注水系统 A5	45.87	0.288	节能	节能
注水系统B1	44.89	0.640	合格	合格
注水系统 B2	41.28	2.001	合格	合格
注水系统B3	41.86	0.600	合格	合格
注水系统 B4	19.76	5.736	不合格	不合格
注水系统B5	27.89	2.450	不合格	不合格

注水系统	注水井	单耗节能率
注水系统A1	L61-38	-0.830 0
注水系统A2	H47-61	-1.810 2
注水系统A3	J10-55	-1.872 4
注水系统A4	H509-62	-0.745 1
注水系统A5	S16-24	-0.348 7

注水系统	注水井	单耗节能率
注水系统B1	J31-63	-6.095 4
注水系统B2	J63-11	-1.291 1
注水系统B3	Q29-25	-4.746 9
注水系统B4	J71-163	-2.244 0
注水系统B5	F43-29	-1.879 0