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SAGD水平段动用程度判断方法及动用模式分析
桑林翔,张家豪,宁朦,徐乔南,李程辉,潘海峰
0
(1.中国石油新疆油田分公司风城油田作业区,新疆克拉玛依834000;2.中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000;3.国勘石油技术有限公司,北京100083)
摘要:
在超稠油双水平井SAGD生产过程中,准确、快速判断水平段动用程度是井组生产措施参数制订和现场参数调控的基础。由于生产井趾端和非趾端井底温度受控因素不同,以温度为依据判断动用程度的常规方法存在局限性。从水平井热量补充和损失角度入手,明确了SAGD生产水平井趾端和非趾端温度的主要影响因素;通过数值模拟和理论公式解析方法,引入单位水平段无因次产能参数和水平井沿程温压耦合数学模型,分别对趾端和非趾端动用程度进行判断,进而提出SAGD水平段动用程度判断方法。在此基础上,对矿场正常生产阶段155个SAGD井组进行了动用程度研究,实例证实该方法可靠、便捷,易于操作。结合地质因素,建立了5种动用模式并分析了不同模式的生产特征,明确了影响SAGD生产效果主控因素为水平段动用程度,为矿场参数调控和措施调整奠定了基础。
关键词:  超稠油  SAGD  双水平井  动用程度  温度梯度  判断方法
DOI:10.13673/j.cnki.cn37-1359/te.2020.06.017
基金项目:国家科技重大专项“改善SAGD开发效果技术研究与应用”(2016ZX05012-002)。
Study on judgement method of producing degree and producing mode of SAGD horizontal section
SANG Linxiang,ZHANG Jiahao,NING Meng,XU Qiaonan,LI Chenghui,PAN Haifeng
(1.Fengcheng Oilfield Operating Area,Xinjiang Oilfield Company,CNPC,Karamay,Xinjiang,834000,China;2.Research Institute of Exploration and Development,Xinjiang Oilfield Company,CNPC,Karamay,Xinjiang,834000,China;3.FOR-ENERGY Petroleum Technology Co.,Ltd.,Beijing City,100083,China)
Abstract:
During the SAGD production of super heavy oil reservoirs using dual-horizontal wells,the accurate and rapid judgement of the effective producing degree of the horizontal section is the basis for well group production measure parameter formulation and field parameter adjustment. The conventional method of judging the effective producing degree based on the temperature has limitations due to the different controlling factors of bottom hole temperature at the toe and non-toe points of the production well. Firstly,the main factors affecting the temperature at the toe and non-toe points of the production horizontal wells were clarified from the perspective of heat supplement and loss in horizontal wells. Through numerical simulation and theoretical formula analysis,the dimensionless productivity parameters per unit horizontal section and the mathematical model with temperature and pressure coupled along the horizontal well were introduced. The producing degrees at the toe and non-toe points were judged,respectively,and then,a method of judging the effective producing degree of the SAGD horizontal section was formed. On this basis,the producing degree of 155 SAGD well groups in the normal production stage was studied,and the reliability,convenience and easy operation of this method have been confirmed. Combined with geological factors,five production modes were established,and the production characteristics of different modes were analyzed. It is clear that the main controlling factor that affects the SAGD production effect is the producing degree of the horizontal section,which provides the basis for field parameter control and measure regulation.
Key words:  super heavy oil  SAGD  dual horizontal wells  producing degree  temperature gradient  judgement method

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