本文關鍵詞：紅河油田長水平段水平井鉆井工藝研究　出處：《長江大學》2015年碩士論文　論文類型：學位論文

  更多相關文章： 紅河油田 水平井 鉆頭優(yōu)選 鉆具組合 摩阻扭矩

【摘要】：紅河油田是我國在鄂爾多斯盆地南部重點勘探開發(fā)區(qū)塊之一,具有很好的開發(fā)前景。其主要含油層位延安組和延長組都具有壓力低、孔隙度低、滲透性超級低的油藏特點,近兩年紅河油田勘探開發(fā)實踐證明,長水平段水平井及其配套工藝能夠有效解決多年來該地區(qū)直井、定向井以及單井產(chǎn)量低的重大問題。但長水平段水平井由于其井身結構和技術措施的與眾不同,使其鉆完井過程中摩阻扭矩大,鉆速慢,鉆井周期長；又由于紅河油田地質(zhì)條件復雜,地層裂縫較多、承壓小、穩(wěn)定性差,富含泥巖、煤層,易吸水膨脹,鉆進過程中易出現(xiàn)井壁坍塌、粘附卡鉆、掉塊卡鉆等井內(nèi)復雜情況,鹽膏層的存在也容易引發(fā)泥漿被鹽膏侵,使下鉆、下套管和電測井更加困難。為解決紅河油田長水平段水平井鉆井過程中易井漏、卡鉆、坍塌、膏侵等問題,廣泛調(diào)研了紅河油田鉆井技術現(xiàn)狀,對42口井井史資料進行溯源、統(tǒng)計,針對其復雜難點,采用機械鉆速法和主成分分析法進行鉆頭優(yōu)選,并綜合分析已鉆井數(shù)據(jù)資料進行了鉆具組合優(yōu)選,采用計算機語言以及迭代的數(shù)學計算方法編制的計算分析軟件對不同鉆井工況條件下摩阻、扭矩進行分析計算,并提出了降摩減扭的方法措施。通過開展本課題的研究,不僅加快了紅河油田長水平段水平井的鉆進速度,減少井下復雜和事故發(fā)生時間,縮短建井周期,而且為該區(qū)塊實現(xiàn)規(guī)�；ㄔO,增加勘探開發(fā)的綜合經(jīng)濟效益提供技術參考。取得的主要成果與認識如下：(1)通過對紅河油田已鉆井的復雜事故進行統(tǒng)計和分析,得出該區(qū)塊的鉆井難點主要為：易漏、易卡、易塌、易膏侵、摩阻扭矩大。(2)分析研究各層位的巖石可鉆性,通過機械鉆速法和主成分分析法建議主要使用PDC鉆頭以提高生產(chǎn)收益。為了更好地控制水平井井眼軌跡,提高中靶率,通過對比分析已鉆井數(shù)據(jù)最終確定了適合紅河油田長水平段水平井優(yōu)快鉆井的鉆具組合。(3)采用三維軟桿模型對井下管柱受力分析,利用摩扭計算模型,分析了各種工況以及不同井眼剖面下的軸向力和摩阻扭矩,并提出了降摩減扭的措施,如泥漿性能優(yōu)化、使用降摩阻短節(jié)等。(4)現(xiàn)場應用結果表明,該工藝有效的解決了紅河油田鉆長水平段水平井的鉆井難題,試驗井的機械鉆速比之前已鉆井的要高54.7%,復雜情況發(fā)生的總時間減少了71.76%,該地區(qū)長水平段水平井的建井周期縮短了34.9%,為紅河油田長水平段水平井的建設提供了強有力的技術參考。
[Abstract]:Honghe Oilfield is one of the key exploration and development blocks in the south of Ordos Basin, which has a good development prospect. The Yanan formation and Yanchang formation, the main oil-bearing strata, have low pressure and low porosity. The characteristics of super low permeability reservoir, the exploration and development practice of Honghe Oilfield in recent two years proved that the horizontal well in long horizontal section and its supporting technology can effectively solve the problem of straight wells in this area for many years. The low production of directional well and single well is a major problem. However, due to the difference of well structure and technical measures in long horizontal section, the friction torque is large, the drilling speed is slow and the drilling period is long during drilling and completion. Due to the complex geological conditions, more formation fractures, low pressure, poor stability, rich in mudstone, coal seam, easy to absorb water expansion, drilling process is prone to collapse, sticking to drill. In order to solve the problem of easy well leakage during drilling long horizontal section of Honghe Oilfield, the existence of salt paste layer can easily lead to mud being invaded by salt paste, which makes drilling, casing and electric logging more difficult. Based on the investigation of drilling technology status quo of Honghe Oilfield, 42 well history data are traced and counted, aiming at its complex difficulties. The drilling speed method and principal component analysis method are used to select the drill bit, and the drilling data are analyzed synthetically to optimize the drilling tool combination. The friction and torque under different drilling conditions are analyzed and calculated by computer language and iterative mathematical calculation software. Through the research of this subject, not only the drilling speed of horizontal wells in long horizontal section of Honghe Oilfield is accelerated, the time of downhole complexity and accidents is reduced, and the construction period is shortened. And to achieve large-scale construction of the block. Increase the comprehensive economic benefit of exploration and development to provide technical reference. The main achievements and understanding are as follows: 1) through the statistics and analysis of the complex accidents in Honghe Oilfield. It is concluded that the difficulties of drilling in this block are: easy leakage, easy card, easy collapse, easy plaster invasion, high friction torque. 2) the rock drillability of each layer is analyzed and studied. Through the method of mechanical drilling speed and principal component analysis, it is suggested that the PDC bit should be mainly used to increase the production income, in order to better control the horizontal wellbore trajectory and improve the target rate. Through the comparison and analysis of drilling data, it is determined that the combination of drilling tools suitable for high speed drilling of horizontal wells in long horizontal section of Honghe Oilfield. The three-dimensional soft pipe model is used to analyze the stress of the downhole string, and the friction and torsion calculation model is used. The axial force and friction torque under various working conditions and different borehole profiles are analyzed, and the measures to reduce friction and torsion are put forward, such as the optimization of mud performance, the use of reduced-friction section, etc.) the field application results show that. This process effectively solves the drilling problem of horizontal wells in long horizontal section in Honghe Oilfield. The mechanical drilling speed of test wells is 54.7 higher than that of previously drilled wells, and the total time of complex cases is reduced by 71.76%. The construction period of long horizontal horizontal well in this area has been shortened by 34.9, which provides a strong technical reference for the construction of long horizontal horizontal well in Honghe Oilfield.
【學位授予單位】：長江大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE243

【參考文獻】

相關期刊論文 前3條

1 閆鐵;李慶明;王巖;李井輝;畢雪亮;;水平井鉆柱摩阻扭矩分段計算模型[J];大慶石油學院學報;2011年05期

2 N.B.Moore ,安文忠;非旋轉鉆桿保護器在大位移延伸井中的應用[J];國外油田工程;2002年02期

3 何衛(wèi)濱;劉瀚宇;黃峰;劉學敏;朱強;李磊;;蘇里格氣田定向井井壁穩(wěn)定性分析研究[J];石油地質(zhì)與工程;2011年01期

相關碩士學位論文 前1條

1 楊鵬;長水平段水平井旋轉造斜鉆井工具研究[D];西安石油大學;2013年

，

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