發(fā)布時(shí)間：2018-05-21 00:30

  本文選題：鉆井液 + 鉆具組合��； 參考：《東北石油大學(xué)》2017年碩士論文

【摘要】：隨著大慶油田開(kāi)發(fā)的不斷深入,油田勘探面臨的形勢(shì)更加嚴(yán)峻,資源的有序接替以及產(chǎn)量規(guī)模的保持都是世界級(jí)技術(shù)難題,加之2015年以來(lái),國(guó)際油價(jià)持續(xù)低迷,油田勘探開(kāi)發(fā)整體效益受到了嚴(yán)重影響,石油天然氣行業(yè)迎來(lái)控投資、減產(chǎn)能和降成本的新形勢(shì)。在該嚴(yán)峻形勢(shì)下,鉆井技術(shù)作為油氣資源勘探開(kāi)發(fā)的關(guān)鍵技術(shù)手段,起著舉足輕重的作用。大慶油田長(zhǎng)垣主力油田經(jīng)過(guò)多年的調(diào)整開(kāi)發(fā),進(jìn)入特高含水開(kāi)發(fā)階段,調(diào)整井鉆井中面臨著諸多新問(wèn)題,普遍表現(xiàn)出機(jī)械鉆速低、井下情況復(fù)雜等問(wèn)題。就杏76區(qū)塊而言,該區(qū)塊斷層發(fā)育,地層傾角變化大,地層破裂壓力較低,由于該區(qū)塊地質(zhì)構(gòu)造的特殊性,大大增加了鉆井施工過(guò)程中井漏、井噴等事故發(fā)生的概率,這些都極大地限制了鉆井速度的提高,增加了油層保護(hù)的難度,因此有必要采用新工藝、新技術(shù)、新工具,進(jìn)一步提高機(jī)械鉆速,完善相應(yīng)配套技術(shù),實(shí)現(xiàn)該區(qū)塊安全快速鉆井的目標(biāo),達(dá)到提高機(jī)械轉(zhuǎn)速、縮短建井周期,降低成本的目的。由于杏76區(qū)地層傾角大,同時(shí)發(fā)育淺氣和斷層,地質(zhì)情況復(fù)雜,鉆井事故復(fù)雜多發(fā),在影響鉆井速度的同時(shí)給鉆井生產(chǎn)帶來(lái)嚴(yán)重的危害,因此對(duì)該地區(qū)鉆井技術(shù)進(jìn)行優(yōu)化十分重要。為了有效降低該區(qū)塊鉆井事故的發(fā)生,本文在己有的技術(shù)基礎(chǔ)上進(jìn)行了深入研究,首先對(duì)杏76區(qū)的地質(zhì)構(gòu)造特征進(jìn)行了分析,在復(fù)雜地質(zhì)情況條件下鉆井事故復(fù)雜性進(jìn)行了研究,重點(diǎn)分析了在鉆進(jìn)過(guò)程中形成井塌、井漏等復(fù)雜情況的原因,從而對(duì)鉆井施工產(chǎn)生的影響;開(kāi)展了對(duì)鉆井液、鉆具組合、鉆頭及鉆井參數(shù)優(yōu)化研究,通過(guò)結(jié)合本區(qū)塊的地質(zhì)條件,開(kāi)展鉆井液體系試驗(yàn),確定了合理的鉆井液配方;通過(guò)對(duì)鉆井液流動(dòng)試驗(yàn)的分析,優(yōu)化了井身結(jié)構(gòu),計(jì)算出合理的井眼大小,并優(yōu)選大水眼的PDC鉆頭,在提高機(jī)械鉆速的同時(shí)減少井下復(fù)雜情況的發(fā)生;通過(guò)對(duì)鉆具結(jié)構(gòu)性能的分析,優(yōu)化了鉆具組合及鉆進(jìn)參數(shù)。通過(guò)對(duì)杏76區(qū)的鉆井技術(shù)的優(yōu)化,可有效降低該區(qū)塊鉆井事故復(fù)雜性,加快該區(qū)塊勘探開(kāi)發(fā)步伐,可為各鉆井公司在本區(qū)塊安全快速鉆井施工提供借鑒。
[Abstract]:With the development of Daqing oil field, the situation of oil field exploration is becoming more severe. The orderly replacement of resources and the maintenance of production scale are all world-class technical problems. In addition, since 2015, the international oil price has been in the doldrums. The overall benefit of oil field exploration and development has been seriously affected, and the oil and gas industry is facing a new situation of controlling investment, reducing output and reducing costs. In this severe situation, drilling technology, as a key technical means of oil and gas exploration and development, plays an important role. After many years of adjustment and development, the main oilfield in Changyuan of Daqing Oilfield has entered the stage of super high water cut development. The drilling of adjustment wells is faced with many new problems, such as low drilling speed and complex downhole conditions. As far as Xing76 block is concerned, the fault is developed, the dip angle of formation changes greatly, and the formation fracture pressure is low. Because of the particularity of geological structure in this block, the probability of accidents such as well leakage and blowout in drilling construction is greatly increased. These have greatly limited the drilling speed and increased the difficulty of reservoir protection. Therefore, it is necessary to adopt new technology, new technology and new tools to further improve the drilling speed of machinery and improve the corresponding matching technology. The goal of safe and fast drilling in this block can be achieved by increasing the rotating speed of machinery, shortening the construction period and reducing the cost. Due to the large formation dip angle, the development of shallow gas and faults, the complex geological conditions and complex drilling accidents, the Xing76 area has brought serious harm to drilling production while affecting the drilling speed. Therefore, it is very important to optimize drilling technology in this area. In order to effectively reduce the occurrence of drilling accidents in this block, this paper makes a thorough study on the existing technologies. Firstly, the geological structure characteristics of Xing76 area are analyzed. In this paper, the complexity of drilling accidents under complex geological conditions is studied, and the reasons for the formation of well collapse, well leakage and other complex conditions during drilling are emphatically analyzed, thus the influence on drilling operation, the drilling fluid and the combination of drilling tools are carried out. According to the geological conditions of the block, the drilling fluid system test was carried out to determine the rational drilling fluid formula, and the well structure was optimized by analyzing the drilling fluid flow test. The PDC bit with reasonable hole size and high water hole is calculated to increase the drilling speed and reduce the occurrence of the complex situation in the downhole. Through the analysis of the structure and performance of the drilling tool, the drilling tool combination and drilling parameters are optimized. Through the optimization of drilling technology in Xing76 area, the complexity of drilling accidents can be reduced effectively, the exploration and development pace of this block can be quickened, and the safety and rapid drilling construction of each drilling company in this block can be used for reference.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TE22
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本文編號(hào)：1916937