本文選題：小井眼 + 擴眼器　； 參考：《西南石油大學》2015年碩士論文

【摘要】：小井眼側鉆主要解決油田老區(qū)塊上具有開發(fā)價值的加深井、變形井和事故井恢復產能的難題,是目前各油田降低成本增產原油的重要措施之一,隨鉆擴眼技術是小井眼側鉆的關鍵技術之一,主要解決因地層蠕變或者地層不穩(wěn)定導致的縮徑或井壁坍塌等問題,并且能十分有效的解決小井眼固井質量差的問題。由于擴眼過程中形成的井眼為階梯形井眼,跟常規(guī)井的井壁受力有很大區(qū)別,因此,應根據(jù)其自身的工作特點與要求設計出能有效吃入井壁且高效、穩(wěn)定切削巖石的擴眼刀翼。本文在立足對國內外擴眼刀翼結構調查與認知的基礎上,借鑒PDC鉆頭的設計方法,開展隨鉆擴眼刀翼結構與布齒設計,通過有限元分析軟件分析了刀翼流道的流場情況,并且開展“考慮多環(huán)境載荷”下的井壁巖石破碎模擬,獲取上覆巖層壓力、水平地應力和井眼壓力作用下的鉆齒破碎井壁巖石的互作用特性,并根據(jù)獲得結果調整、優(yōu)化擴眼器刀翼的布齒參數(shù)。本文主要完成的研究工作有以下幾個方面：(1)調研國內外擴眼器的現(xiàn)狀,了解了擴眼器的發(fā)展歷程和現(xiàn)階段國內外公司具有代表性的擴眼器結構和工作原理,為后文的設計提供指導。(2)吸取了現(xiàn)有較為先進的擴眼器的設計理念,針對3000m左右井段小井眼側鉆后全面鉆進階段裸眼段的擴徑需求,設計了一種具有硬支撐效果,功能先進,擴徑率大且穩(wěn)定的隨鉆擴眼器。(3)借鑒PDC鉆頭的設計原理,對擴眼刀翼進行了結構設計和布齒設計。并且針對擴眼刀翼容易產生泥包的情況,做了改進設計,方法是“寬流域,減深度”。利用ANSYS軟件做了流場分析,并且研究了鉆井液排量、粘度、密度、噴口傾角等對切削刃上齒面流速的影響。(4)開展了單齒破碎階梯形井壁巖石的模擬。優(yōu)化了刀翼的布齒參數(shù)。本文開展的工作將有助于加強對擴眼器破碎環(huán)形井壁機理的認識,并對擴眼器及其刀翼的設計和隨鉆擴眼工藝的實施提供一定的指導作用。
[Abstract]:Small hole sidetracking is one of the most important measures to reduce the cost and increase production of crude oil in oil fields, mainly to solve the problem of recovery productivity of deep wells, deformed wells and accident wells with development value in old blocks of oil fields. The technology of reaming while drilling is one of the key techniques of sidetracking, which mainly solves the problems of shrinkage or wall collapse caused by formation creep or formation instability, and can effectively solve the problem of poor cementing quality of small borehole. Due to the fact that the borehole formed in the process of reaming is a step shaped well, which is very different from that of the conventional well, the reaming blade which can effectively eat into the well wall and be efficient and stable in cutting rock should be designed according to its own working characteristics and requirements. Based on the investigation and cognition of the reaming blade structure at home and abroad and the design method of PDC bit, the structure and tooth distribution design of the reaming blade while drilling is carried out. The flow field of the blade runner is analyzed by finite element analysis software. Under the condition of "considering multiple environmental loads", the rock fragmentation simulation of borehole lining is carried out to obtain the interaction characteristics of drilling and breaking rock under the action of overburden rock pressure, horizontal ground stress and borehole pressure, and adjusted according to the obtained results. To optimize the tooth distribution parameters of the reamer blade. The main research work accomplished in this paper is as follows: 1) to investigate the present situation of reamer at home and abroad, to understand the development of reamer and the typical structure and working principle of reamer in domestic and foreign companies at present. In order to provide guidance for the later design, this paper absorbs the design idea of the more advanced reaming device, aiming at the needs of expanding the diameter of the open-hole section in the comprehensive drilling stage after the small hole side drilling of about 3000 m, designs a new type with hard support effect and advanced function. Based on the design principle of PDC bit, the structure design and tooth arrangement design of reaming cutter blade are carried out. Aiming at the situation that the reaming blade is easy to produce mud bag, the improved design is made, the method is "wide basin, reduce depth". The influence of drilling fluid displacement, viscosity, density and nozzle inclination on the flow velocity on the cutting edge has been studied by using ANSYS software. The simulation of single tooth broken step sidewall rock has been carried out. The tooth distribution parameters of the blade are optimized. The work carried out in this paper will help to strengthen the understanding of the mechanism of hole reamer breaking annular wellbore and provide some guidance for the design of reamer and its blade as well as the implementation of reaming while drilling process.
【學位授予單位】：西南石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE921.1

【參考文獻】

相關期刊論文 前10條

1 伍開松;鄧敏凱;楊迎新;;橢圓形與圓形PDC齒破巖有限元仿真對比分析[J];石油機械;2011年05期

2 宿振國;許俊良;溫林榮;李永平;;超深井順6井的擴眼實踐與認識[J];石油鉆采工藝;2010年06期

3 馬汝濤;紀友哲;王輝;;油氣鉆井擴眼工具研究現(xiàn)狀及發(fā)展趨勢[J];石油機械;2010年08期

4 羅德;黎明發(fā);吳波;范端;;聚晶金剛石復合片鉆頭鉆進巖層的仿真研究[J];武漢理工大學學報;2010年10期

5 鄒德永;蔡環(huán);;布齒參數(shù)對PDC鉆頭破巖效率影響的試驗[J];中國石油大學學報(自然科學版);2009年05期

6 陳勇;萬教育;趙子仁;鐘智慧;;PDC鉆頭破巖的動態(tài)數(shù)值模擬[J];新疆石油天然氣;2009年03期

7 徐根;陳楓;馬春德;徐國平;;PCD彈性模量、泊松比的測試實驗研究[J];石油鉆探技術;2009年02期

8 夏育新;戴立斌;龍利平;邵東波;吳風云;;PDC鉆頭泥包的識別及其錄井參數(shù)特征[J];錄井工程;2009年01期

9 閆鐵;李瑋;畢雪亮;李士斌;;一種基于破碎比功的巖石破碎效率評價新方法[J];石油學報;2009年02期

10 張愛輝;徐進;龐希斌;劉亞洲;;圍壓對大理巖力學特性影響的試驗研究[J];西南民族大學學報(自然科學版);2008年06期

相關博士學位論文 前1條

1 楊慶理;復雜地層PDC鉆頭個性化設計及應用研究[D];中國石油大學;2007年

相關碩士學位論文 前1條

1 蔡環(huán);PDC鉆頭關鍵設計參數(shù)優(yōu)化研究[D];中國石油大學;2008年

，

本文編號：1808644