發(fā)布時(shí)間：2018-08-10 17:50

【摘要】：油氣井固井注水泥施工時(shí)使用旋流扶正器導(dǎo)流產(chǎn)生螺旋流的頂替方式,可以大大提高注水泥頂替效率;但是,目前油氣井固井使用旋流扶正器大多憑借經(jīng)驗(yàn),缺乏理論依據(jù)和行業(yè)標(biāo)準(zhǔn)。對(duì)固井施工使用較多的賓漢塑性流體介質(zhì)條件下旋流扶正器的井下間距設(shè)計(jì)方法進(jìn)行了研究。使用聚丙烯酰胺配制相似液模擬直井條件下的環(huán)空流體進(jìn)行實(shí)驗(yàn),使用吊線法測(cè)取沿程旋流角,得出賓漢塑性流體在旋流扶正器導(dǎo)流作用后旋流衰減規(guī)律,通過受力平衡分析推導(dǎo)出了被頂替液靜切力小于等于和大于1.81倍頂替液的動(dòng)切力值時(shí)的旋流扶正器安裝間距計(jì)算公式;該公式反映了井眼環(huán)空結(jié)構(gòu)、旋流扶正器導(dǎo)流角、導(dǎo)葉高度,以及賓漢塑性流體性能對(duì)旋流扶正器井下間距的影響,為指導(dǎo)旋流扶正器井下間距設(shè)計(jì)、優(yōu)化固井液的性能、合理使用施工排量提供了依據(jù)。
[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.
【作者單位】： 西華師范大學(xué)油氣資源開發(fā)與油田環(huán)境保護(hù)研究所;中國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】：四川省科技廳科技計(jì)劃項(xiàng)目(No.2017JY0816)資助
【分類號(hào)】：TE256;TE925.2

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