石油钻采工艺2016，Vol.38Issue(4)：473-478,6.DOI:10.13639/j.odpt.2016.04.013
大规模水力压裂过程中超级13Cr 油管冲蚀预测模型建立
Erosion prediction model for super 13Cr tubing during large-scale hydraulic fracturing
摘要
Abstract
Sand-carrying fracturing fluid flowing at high-speed during large-scale hydraulic fracturing can erode inner walls of tubing, resulting in thinning of tubing sidewall and reduction of tubing loading capacity. To predict erosion rate of tubing during large-scale hydraulic fracturing accurately, the impacts of erosion angle and fluid flow speed on erosion rate of the super 13Cr tubing have been tested with an erosion testing unit made by ourselves, solid-liquid dual-phase fluid made of 0.2 % guar fracturing fluid and quartz sand of 40/70 meshes, and an erosion prediction model for fracturing with large discharging rate and high sand proportion has been constructed. By using the newly constructed model, impact of total fluid volume and discharging rate on wall thickness loss of the super 13Cr tubing can be predicted accurately. Case study results show the super 13Cr tubing may lose sidewall thicknesses of 0.2-1.3 mm during large-scale fracturing. Therefore, cares shall be taken to control discharging rate and sand content properly to maintain necessary safety performance of tubing sidewalls in case of erosion.关键词
超级 13Cr 油管/冲蚀模型/水力压裂/冲蚀角度/流速Key words
the super 13Cr tubing/erosion model/hydraulic fracturing/erosion angle/flow speed分类
能源科技引用本文复制引用
王治国,杨向同,窦益华,罗生俊..大规模水力压裂过程中超级13Cr 油管冲蚀预测模型建立[J].石油钻采工艺,2016,38(4):473-478,6.基金项目
国家科技重大专项“超深超高压气井油套管柱安全评价与控制技术研究”（编号2011ZX05046-03-07）；陕西省自然科学基础研究计划项目“大排量高砂比水力压裂管柱冲蚀机理研究”（编号2015JM5223）。 （）
