宾汉塑性流体中旋流扶正器间距设计方法
发布时间：2018-08-10 17:50
【摘要】：油气井固井注水泥施工时使用旋流扶正器导流产生螺旋流的顶替方式,可以大大提高注水泥顶替效率;但是,目前油气井固井使用旋流扶正器大多凭借经验,缺乏理论依据和行业标准。对固井施工使用较多的宾汉塑性流体介质条件下旋流扶正器的井下间距设计方法进行了研究。使用聚丙烯酰胺配制相似液模拟直井条件下的环空流体进行实验,使用吊线法测取沿程旋流角,得出宾汉塑性流体在旋流扶正器导流作用后旋流衰减规律,通过受力平衡分析推导出了被顶替液静切力小于等于和大于1.81倍顶替液的动切力值时的旋流扶正器安装间距计算公式;该公式反映了井眼环空结构、旋流扶正器导流角、导叶高度,以及宾汉塑性流体性能对旋流扶正器井下间距的影响,为指导旋流扶正器井下间距设计、优化固井液的性能、合理使用施工排量提供了依据。
[Abstract]:In cementing construction of oil and gas wells, the displacement mode of spiral flow produced by swirl centralizer diversion can greatly improve the displacement efficiency of cement injection. However, at present, most of the rotary centralizer used in oil and gas well cementing depends on experience. Lack of theoretical basis and industry standards. The design method of downhole spacing of swirl centralizer under the condition of Bingham plastic fluid medium is studied in cementing operation. Using polyacrylamide to prepare similar liquid to simulate annulus fluid under vertical well condition, using hoisting line method to measure the swirl angle along the path, the attenuation law of Bingham plastic fluid is obtained after the flow guide of swirl centralizer. The formula for calculating the installation distance of swirl centralizer when the static shear force of displaced fluid is less than or greater than 1.81 times of the displacement fluid is derived by force balance analysis, which reflects the structure of borehole annulus and the diversion angle of swirl centralizer. The influence of guide vane height and Bingham plastic fluid performance on the downhole spacing of swirl centralizer provides a basis for guiding the design of downhole spacing of swirl centralizer optimizing the performance of cementing fluid and reasonably using the working displacement.
【作者单位】： 西华师范大学油气资源开发与油田环境保护研究所;中国石油化工股份有限公司西南石油工程公司固井分公司;
【基金】：四川省科技厅科技计划项目(No.2017JY0816)资助
【分类号】：TE256;TE925.2
[Abstract]:In cementing construction of oil and gas wells, the displacement mode of spiral flow produced by swirl centralizer diversion can greatly improve the displacement efficiency of cement injection. However, at present, most of the rotary centralizer used in oil and gas well cementing depends on experience. Lack of theoretical basis and industry standards. The design method of downhole spacing of swirl centralizer under the condition of Bingham plastic fluid medium is studied in cementing operation. Using polyacrylamide to prepare similar liquid to simulate annulus fluid under vertical well condition, using hoisting line method to measure the swirl angle along the path, the attenuation law of Bingham plastic fluid is obtained after the flow guide of swirl centralizer. The formula for calculating the installation distance of swirl centralizer when the static shear force of displaced fluid is less than or greater than 1.81 times of the displacement fluid is derived by force balance analysis, which reflects the structure of borehole annulus and the diversion angle of swirl centralizer. The influence of guide vane height and Bingham plastic fluid performance on the downhole spacing of swirl centralizer provides a basis for guiding the design of downhole spacing of swirl centralizer optimizing the performance of cementing fluid and reasonably using the working displacement.
【作者单位】： 西华师范大学油气资源开发与油田环境保护研究所;中国石油化工股份有限公司西南石油工程公司固井分公司;
【基金】：四川省科技厅科技计划项目(No.2017JY0816)资助
【分类号】：TE256;TE925.2
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