天堂国产午夜亚洲专区-少妇人妻综合久久蜜臀-国产成人户外露出视频在线-国产91传媒一区二区三区

當(dāng)前位置:主頁 > 科技論文 > 石油論文 >

基于分?jǐn)?shù)階黏彈性本構(gòu)方程的井眼蠕變模型

發(fā)布時(shí)間:2018-05-03 22:24

  本文選題:黏彈性本構(gòu)方程 + 分?jǐn)?shù)階模型; 參考:《石油勘探與開發(fā)》2017年06期


【摘要】:為精確模擬井眼蠕變歷程,預(yù)測和預(yù)防井壁坍塌、套管擠毀和卡鉆等工程事故,在前人研究的基礎(chǔ)上,將彈簧壺元件引入經(jīng)典元件模型中,得到了分?jǐn)?shù)階模型的蠕變?nèi)崃?并驗(yàn)證了分?jǐn)?shù)階模型的擬合效果。研究認(rèn)為分?jǐn)?shù)階模型能夠?qū)崿F(xiàn)少參數(shù)、高精度的模擬,并且相應(yīng)參數(shù)的物理意義也更加明確。通過黏彈對應(yīng)性原理,模擬了鉆進(jìn)和壓井過程中的井眼蠕變情況,通過調(diào)整求導(dǎo)階數(shù)可以使該模型在理想彈性體模型和標(biāo)準(zhǔn)固體模型之間轉(zhuǎn)化,因此,基于標(biāo)準(zhǔn)固體本構(gòu)方程和理想彈性體本構(gòu)方程建立的井眼縮徑模型僅是該模型的特例。分析模擬結(jié)果認(rèn)為調(diào)整分?jǐn)?shù)階元件的階數(shù),可以在加快瞬態(tài)蠕變的同時(shí)降低穩(wěn)態(tài)蠕變的速度,對蠕變曲線進(jìn)行非對稱調(diào)整,經(jīng)典模型則無法通過調(diào)整單一參數(shù)達(dá)到這一目的,分?jǐn)?shù)階黏彈性本構(gòu)方程擬合高度非線性實(shí)驗(yàn)數(shù)據(jù)的能力更強(qiáng)。
[Abstract]:In order to simulate the creep history of borehole accurately and to predict and prevent engineering accidents such as wellbore collapse, casing collapse and drill jam, the spring pot element was introduced into the classical element model on the basis of previous studies, and the creep compliance of fractional order model was obtained. The fitting effect of fractional order model is verified. It is considered that the fractional order model can be simulated with less parameters and higher accuracy, and the physical meaning of the corresponding parameters is more clear. Through the viscoelastic correspondence principle, the hole creep during drilling and well killing is simulated. By adjusting the derivation order, the model can be transformed between the ideal elastomer model and the standard solid model. The borehole shrinkage model based on standard solid constitutive equation and ideal elastomer constitutive equation is only a special case of this model. The simulation results show that adjusting the order of fractional component can accelerate the transient creep and decrease the steady state creep speed. The creep curve can be adjusted asymmetrically, but the classical model can not achieve this goal by adjusting a single parameter. The fractional viscoelastic constitutive equation is more capable of fitting highly nonlinear experimental data.
【作者單位】: 油氣藏地質(zhì)及開發(fā)工程國家重點(diǎn)實(shí)驗(yàn)室(西南石油大學(xué));
【基金】:國家自然科學(xué)基金重大項(xiàng)目(51490653) 四川省青年科技創(chuàng)新研究團(tuán)隊(duì)專項(xiàng)計(jì)劃項(xiàng)目(2017TD0013)
【分類號】:TE21

【相似文獻(xiàn)】

相關(guān)期刊論文 前1條

1 同登科,陳欽雷;非牛頓松弛粘彈性液體分?jǐn)?shù)階流動模型[J];石油大學(xué)學(xué)報(bào)(自然科學(xué)版);1998年01期

相關(guān)博士學(xué)位論文 前1條

1 劉健;油氣井水泥石力學(xué)行為本構(gòu)方程與完整性評價(jià)模型研究[D];西南石油大學(xué);2013年

相關(guān)碩士學(xué)位論文 前1條

1 袁偉偉;泥巖動態(tài)蠕變分?jǐn)?shù)階損傷模型研究[D];東北石油大學(xué);2014年

,

本文編號:1840354

資料下載
論文發(fā)表

本文鏈接:http://www.sikaile.net/kejilunwen/shiyounenyuanlunwen/1840354.html


Copyright(c)文論論文網(wǎng)All Rights Reserved | 網(wǎng)站地圖 |

版權(quán)申明:資料由用戶f971e***提供,本站僅收錄摘要或目錄,作者需要?jiǎng)h除請E-mail郵箱bigeng88@qq.com