考虑井筒摩阻非均质油藏水平井注水评价方法
Injection evaluation method for the horizontal well in heterogeneity reservoir considering wellbore friction
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- 引用格式:
-
张宏友,王美楠,吴春新,刘文政,张言辉.考虑井筒摩阻非均质油藏水平井注水评价方法[J].天然气与石油,2023,41(3):74-79.doi:10.3969/j.issn.1006-5539.2023.03.011
ZHANG Hongyou, WANG Meinan, WU Chunxin, LIU Wenzheng, ZHANG Yanhui.Injection evaluation method for the horizontal well in heterogeneity reservoir considering wellbore friction[J].Natural Gas and Oil,2023,41(3):74-79.doi:10.3969/j.issn.1006-5539.2023.03.011
- DOI:
- 10.3969/j.issn.1006-5539.2023.03.011
- 作者:
- 张宏友 王美楠 吴春新 刘文政 张言辉
ZHANG Hongyou, WANG Meinan, WU Chunxin, LIU Wenzheng, ZHANG Yanhui
- 作者单位:
- 中海石油(中国)有限公司天津分公司渤海石油研究院, 天津 300452
Bohai Oilfield Research Institute of CNOOC Ltd., Tianjin, Branch Tianjin, 300452, China
- 关键词:
- 水平注水井;井筒摩阻;非均质性;叠加原理;注水能力评价
Horizontal water injection well; Wellbore friction; Reservoir heterogeneity; Principle of superposition; Injection capacity evaluation
- 摘要:
渤海南部复杂断块河流相油藏水平注水井存在沿程注入量分布不均的问题,严重影响注水开发效果。基于势叠加和镜像反映原理,建立了以水平井注采井网为基础,考虑储层非均质性和井筒摩阻影响的水平注水井注水能力评价方法。评价结果表明:受井筒摩阻影响,水平段沿程注入量逐渐降低,跟端注入量大于趾端注入量;受非均质性影响,水平段沿程注入量呈多段式分布,渗透率越大,段内注入量越高。矿场应用表明,新评价方法能准确表征水平注水井水平段沿程注入量分布,以此为依据制定的控水稳油措施具有明显降水增油效果。
In the complex fault-block fluvial facies oilfield in the south of the Bohai Sea, the uneven distribution of injection volume along the horizontal water injection wells has seriously affected the water injection development effect. Based on the principle of potential superposition and mirror reflection, this paper established an evaluation method of water injection capacity of horizontal water injection wells, considering the effects of reservoir heterogeneity and wellbore for the injection-production well pattern of horizontal wells. The evaluation results show that: influenced by wellbore, the injection rate along the horizontal section decreases gradually, and the injection rate at the heel end is greater than that at the toe end; due to the influence of heterogeneity, the injection volume along the horizontal section is distributed in multiple sections. Specifically, the higher the permeability is, the higher the injection volume in the section is. Field application shows that the new evaluation method can accurately characterize the distribution of injection volume along the horizontal section of horizontal water injection wells. Water control and oil stabilization measures are formulated based on this study, and the effectiveness has been proven by field application.
