煤层气水平井玻璃钢管固井居中度分析
Centrality Analysis of FRP Pipes Cementing in Coalbed Methane Horizontal Well
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- 引用格式:
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冯雷,刘立砖,冯福平,胡超洋,黄芮,丛子渊.煤层气水平井玻璃钢管固井居中度分析[J].天然气与石油,2018,36(3):0.doi:
Feng Lei, Liu Lizhuan, Feng Fuping, Hu Chaoyang, Huang Rui, Cong Ziyuan.Centrality Analysis of FRP Pipes Cementing in Coalbed Methane Horizontal Well[J].Natural Gas and Oil,2018,36(3):0.doi:
- DOI:
- 作者:
- 冯 雷1 刘立砖1 冯福平2 胡超洋2 黄 芮2 丛子渊2
Feng Lei1, Liu Lizhuan1, Feng Fuping2, Hu Chaoyang2, Huang Rui2, Cong Ziyuan2
- 作者单位:
- 1. 中海油能源发展股份有限公司工程技术分公司,2. 东北石油大学石油工程学院
1. Engineering Technology Company of CNOOC Energy Technology＆Services Limited, Tianjin, 300452, China; 2. Institute of Petroleum Engineering, Northeast Petroleum University
- 关键词:
- 煤层气;水平井;玻璃钢管;固井;居中度
Coalbed methane; Horizontal well; FRP pipe; Cementing; Centrality
- 摘要:
- 在煤层气水平井水平段采用玻璃钢套管可以提高后期采煤作业的安全性。为了揭示固井顶替过程中不同时刻玻璃钢管的居中度变化规律,根据玻璃钢管的浮重分析,建立考虑扶正器影响的水平井眼内玻璃钢管居中度计算模型。研究结果表明:由于玻璃钢管密度较低,随着管内外流体密度的变化,顶替过程中水平段玻璃钢管由井眼低边逐渐上浮,偏向井眼高边,其在水平井眼内的位置及居中度处于动态变化之中;减小水泥浆的密度有利于减小顶替结束时玻璃钢管所受向上的浮重,提高玻璃钢管在水平段的居中度。该研究为煤层气水平井玻璃钢管固井套管居中度的改进提供了理论依据。
Usingfiber reinforced plastic (FRP) pipe in the coalbed methane horizontal well can enhance the security of later coal mining. For revealing centralitychange rules of FRP pipe at different stages of cement slurry displacement at different time during coalbed methane horizontal well cementing, on the basis of analysis on buoyant weight of FRP pipe, a centrality calculation model is established by considering the influence of centralizers. The result of the research shows that, because of the low density of the FRP pipe, it will float upward instead of sinking when fluid density changes inside and outside of casing, and its location and centrality may dynamically change. So a lower density of slurry is in favor of reducing buoyant weight of FRP pipe and enhancing its centrality. This research providestheoreticalbasis for the improvement of centralizer for the FRP pipe.
