發(fā)布時(shí)間：2018-07-25 21:16

【摘要】：巖屑床的清除是大位移井鉆井技術(shù)領(lǐng)域關(guān)注的熱點(diǎn)之一,大位移井鉆井過程中容易形成巖屑床,巖屑床的存在給鉆井施工帶來諸多安全問題。因此本文對(duì)如何提高大位移井?dāng)y巖效率展開研究。本文以巖屑顆粒為研究對(duì)象,對(duì)不同井段的巖屑顆粒進(jìn)行受力分析,建立了巖屑顆粒的力學(xué)模型,計(jì)算巖屑臨界滾動(dòng)返速和臨界舉升返速,得到了巖屑運(yùn)移規(guī)律。結(jié)果表明,井斜角50°的井段容易形成巖屑床。在此基礎(chǔ)上,運(yùn)用拉格朗日方法和歐拉方法對(duì)巖屑床的形成過程進(jìn)行了詳細(xì)研究,結(jié)果表明:粒徑大的顆粒容易沉積到下井壁,井壁摩擦力越大巖屑越容易沉積。同時(shí),分別從井斜角、環(huán)空返速、鉆具轉(zhuǎn)速、鉆具偏心度四個(gè)方面對(duì)攜巖效率進(jìn)行分析,所得結(jié)果與實(shí)際作業(yè)規(guī)律一致。為了提高巖屑床的清除效率,本文設(shè)計(jì)了利用機(jī)械作用和水力作用清除了巖屑床的清除器。并運(yùn)用fluent軟件模擬巖屑床清除器對(duì)環(huán)空流場(chǎng)的影響,獲得了新型巖屑床清除器在不同井段的最佳間隔距離。結(jié)果表明該巖屑床清除器效果良好。
[Abstract]:The removal of cuttings bed is one of the hotspots in the field of drilling technology for extended reach wells. It is easy to form cuttings bed in the drilling process of extended reach wells, and the existence of cuttings bed brings many safety problems to drilling construction. Therefore, this paper studies how to improve the rock carrying efficiency of long-reach wells. Taking cuttings as the research object, the mechanical model of cuttings is established by analyzing the stress of cuttings in different well sections, and the critical rolling velocity and lifting velocity of cuttings are calculated, and the rule of cuttings migration is obtained. The results show that cuttings bed is easy to be formed in the section with a slope angle of 50 擄. On this basis, the formation process of cuttings bed is studied in detail by using Lagrangian method and Euler method. The results show that the larger the particle size is, the easier it is to deposit the debris into the lower shaft wall, and the greater the friction of the shaft wall is, the easier it is for the cuttings to deposit. At the same time, the rock carrying efficiency is analyzed from four aspects: well inclination angle, annulus return velocity, drilling tool rotation speed and drilling tool eccentricity. The results are consistent with the actual operation rule. In order to improve the removal efficiency of cuttings bed, this paper designs a scavenger for removing cuttings bed by mechanical action and hydraulic action. The influence of cuttings bed scavenger on annular flow field was simulated by fluent software, and the optimum spacing distance of new type cuttings bed scavenger in different well segments was obtained. The results show that the chip bed remover is effective.
【學(xué)位授予單位】：中國石油大學(xué)(華東)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE242

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 陳建民;張棋;郭鵬增;王少磊;;清除器對(duì)水平井段巖屑運(yùn)移的影響分析[J];石油礦場(chǎng)機(jī)械;2014年10期

2 陳安明;劉軍;;大位移鉆井巖屑床影響因素分析及清除技術(shù)探究[J];電子測(cè)試;2013年19期

3 王鐵臣;;大斜度井井眼凈化技術(shù)研究[J];中國石油和化工標(biāo)準(zhǔn)與質(zhì)量;2013年15期

4 孫曉峰;閆鐵;王克林;焦建軍;張楊;;復(fù)雜結(jié)構(gòu)井井眼清潔技術(shù)研究進(jìn)展[J];斷塊油氣田;2013年01期

5 牛樂祥;馬凡剛;;大斜度大位移定向井井眼凈化技術(shù)[J];中國石油和化工標(biāo)準(zhǔn)與質(zhì)量;2013年01期

6 宋洵成;王振飛;徐小龍;胡莎莎;;大位移井巖屑床危害及處理措施研究[J];石油科技論壇;2012年02期

7 陳鋒;狄勤豐;袁鵬斌;王文昌;姚建林;周永其;翟桂新;;高效巖屑床清除鉆桿作用機(jī)理[J];石油學(xué)報(bào);2012年02期

8 姜洪閣;;鉆具旋轉(zhuǎn)對(duì)巖屑運(yùn)移的影響規(guī)律研究[J];內(nèi)蒙古石油化工;2011年19期

9 郭曉樂;龍芝輝;汪志明;;大位移井巖屑動(dòng)態(tài)運(yùn)移計(jì)算簡(jiǎn)便方法研究[J];石油天然氣學(xué)報(bào);2011年07期

10 郭曉樂;汪志明;龍芝輝;;大位移鉆井全井段巖屑動(dòng)態(tài)運(yùn)移規(guī)律[J];中國石油大學(xué)學(xué)報(bào)(自然科學(xué)版);2011年01期

相關(guān)碩士學(xué)位論文 前2條

1 牟艷宇;鉆具旋轉(zhuǎn)對(duì)造斜段巖屑運(yùn)移的影響規(guī)律研究[D];東北石油大學(xué);2011年

2 鹿傳世;傾斜井眼內(nèi)巖屑運(yùn)移的數(shù)值計(jì)算與清巖工具設(shè)計(jì)流場(chǎng)計(jì)算[D];中國石油大學(xué);2008年

，

本文編號(hào)：2145111