礁灰岩油田水平井微粒充填ICD均衡控水技术
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摘要
随着开发的进行,礁灰岩储层部分井出现水淹的问题,为提高控水质量,提出了微粒充填ICD均衡控水技术。介绍了该控水管柱的结构和工作原理,对限流阀孔径和安装密度、充填微粒粒径、充填施工参数(泵入压力、泵入流量、加砂比)进行了计算和设计,给出了X5井的清水注入试验和现场应用实例。现场应用表明,两口新井较邻井含水降低62%,累增油量超过2.5×104 m~3。通过综合考虑限流阀尺寸和安装密度、充填颗粒粒径与地层砂粒径、充填压力与破裂压力之间的关系,可以在保证油井产能的基础上最大限度地实现均衡控水,该技术适合非均质性强或裂缝发育储层的水平井控水,并推荐在水平段均匀安装限流阀。该研究可为非均质性强或裂缝发育的储层进行控水方案设计提供依据。
As the development goes, some wells suffer water flooding in limestone reef reservoirs. And in order to improve the quality of water control, the particle filling based ICD isostatic water control technology is developed. In this paper, the structure and working principle of this kind of water control string were introduced. Then, the aperture and installation density of flow limiting valve, the size of filling particle and the filling operation parameters(pump in pressure, pump in flow rate and sand proportion) were calculated and designed. Finally, fresh water injection experiment and field application case of Well X5 were described. The field application shows that two new wells have cumulative oil increment over 2.5×104 m~3, and their water cut is 62% lower than that of their neighboring wells. The isostatic water control can be realized to the uttermost while guaranteeing the productivity of oil wells by analyzing comprehensively the relationships between the dimension and the installation density of flow limiting valve, between the size of filling particle and the size of formation sand, and between the filling pressure and the fracturing pressure. In conclusion, this technology is suitable for the water control of horizontal wells in the reservoirs with strong heterogeneity or developed fractures. It is recommended to install flow limiting valves uniformly in horizontal sections. The research results can provide the basis for the design of water control scheme of the reservoirs with strong heterogeneity or developed fractures.
As the development goes, some wells suffer water flooding in limestone reef reservoirs. And in order to improve the quality of water control, the particle filling based ICD isostatic water control technology is developed. In this paper, the structure and working principle of this kind of water control string were introduced. Then, the aperture and installation density of flow limiting valve, the size of filling particle and the filling operation parameters(pump in pressure, pump in flow rate and sand proportion) were calculated and designed. Finally, fresh water injection experiment and field application case of Well X5 were described. The field application shows that two new wells have cumulative oil increment over 2.5×104 m~3, and their water cut is 62% lower than that of their neighboring wells. The isostatic water control can be realized to the uttermost while guaranteeing the productivity of oil wells by analyzing comprehensively the relationships between the dimension and the installation density of flow limiting valve, between the size of filling particle and the size of formation sand, and between the filling pressure and the fracturing pressure. In conclusion, this technology is suitable for the water control of horizontal wells in the reservoirs with strong heterogeneity or developed fractures. It is recommended to install flow limiting valves uniformly in horizontal sections. The research results can provide the basis for the design of water control scheme of the reservoirs with strong heterogeneity or developed fractures.
引文
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[8]陆厚根.粉体技术导论[M].上海:同济大学出版社,1998:94-106.LU Hougen.Introduction to powder technology[M].Shanghai:Tongji University Press,1998:94-106.
[9]蒋建方,王晓东,刘建安,等.基于小型测试对压裂地质特征分析的现场施工[J].石油钻采工艺,2007,29(1):61-64.JIANG Jianfang,WANG Xiaodong,LIU Jian'an,et al.On site construction of fracturing geologic characteristic analysis on small scale test[J].Oil Drilling&Production Technology,2007,29(1):61-64.
[2]张波,黄长穆.南海流花11-1油田工程简介[J].中国海上油气(工程),1996,8(4):61-62.ZHANG Bo,HUANG Changmu.Brief introduction to the project of Liuhua 11-1 oilfield in South China Sea[J].China Offshore Oil and Gas(Engineering),1996,8(4):61-62.
[3]关月,袁照永.水平井防倒流砾石充填工具的改进与应用[J].石油钻采工艺,2015,37(6):117-118.GUAN Yue,YUAN Zhaoyong.Improving and applying of anti-backflow gravel packing tools in horizontal wells[J].Oil Drilling&Production Technology,2015,37(6):117-118.
[4]曾诚,段永刚,刘宇凡.井下流入控制器在底水油藏水平井中的控水调剖作用[J].钻采工艺,2014,37(3):67-70.ZENG Cheng,DUAN Yonggang,LIU Yufan.Water control profile action of inflow control device in horizontal well of bottom water reservoirs[J].Drilling&Production Technology,2014,37(3):67-70.
[5]刘新锋,费建杰,陈学江,等.海上高含水油田稳油控水技术研究及应用[J].特种油气藏,2018,25(3):166-169.LIU Xinfeng,FEI Jianjie,CHEN Xuejiang,et al.Oilmaintenance and water-control in offshore high water-cut oilfield[J].Special Oil&Gas Reservoirs,2018,25(3):166-169.
[6]罗启源,代玲,陈维华,等.ICD控水工艺技术在南海礁灰岩油田的应用与思考[J].长江大学学报(自科版),2016,13(32):68-73.LUO Qiyuan,DAI Ling,CHEN Weihua,et al.Application and thought of water control with inflow control device(ICD)in reef limestone oilfield of South China Sea[J].Journal of Yangtze University(Natural Science Edition),2016,13(32):68-73.
[7]赵旭,龙武,姚志良,等.水平井砾石充填调流控水筛管完井技术[J].石油钻探技术,2017,45(4):65-70.ZHAO Xu,LONG Wu,YAO Zhiliang,et al.Completion techniques involving gravel-packing inflow-control screens in horizontal well[J].Petroleum Drilling Techniques,2017,45(4):65-70.
[8]陆厚根.粉体技术导论[M].上海:同济大学出版社,1998:94-106.LU Hougen.Introduction to powder technology[M].Shanghai:Tongji University Press,1998:94-106.
[9]蒋建方,王晓东,刘建安,等.基于小型测试对压裂地质特征分析的现场施工[J].石油钻采工艺,2007,29(1):61-64.JIANG Jianfang,WANG Xiaodong,LIU Jian'an,et al.On site construction of fracturing geologic characteristic analysis on small scale test[J].Oil Drilling&Production Technology,2007,29(1):61-64.