發(fā)布時(shí)間：2018-07-26 20:46

【摘要】：PDC鉆頭目前在石油鉆井行業(yè)中已經(jīng)得到了廣泛的應(yīng)用,相比于牙輪鉆頭,PDC鉆頭在軟到中硬的均質(zhì)地層中具有單只進(jìn)尺多、機(jī)械鉆速高,安全可靠的特點(diǎn),但在極硬地層中,PDC鉆頭目前還難以完全取代牙輪鉆頭。遼河油區(qū)潛山地層屬于典型的極硬地層,主要分為元古界潛山和太古界潛山兩大類,地質(zhì)巖性以混合花崗巖、白云巖以及輝綠巖為主,巖性堅(jiān)硬,石英含量高,研磨性和沖擊性均極高,對(duì)PDC鉆頭復(fù)合片破壞很大。本文分析了遼河油區(qū)潛山地層的巖性特點(diǎn),并對(duì)極硬地層導(dǎo)致PDC鉆頭復(fù)合片過(guò)早損壞的原因進(jìn)行了分析,通過(guò)PDC鉆頭三維設(shè)計(jì)、井底受力有限元分析、關(guān)鍵參數(shù)優(yōu)化設(shè)計(jì)、井底工況模擬鉆進(jìn)分析等技術(shù)總結(jié)出最適合遼河油區(qū)潛山地層的152.4mmPDC鉆頭為5刀翼16mm復(fù)合片,中等后傾角,雙排齒的結(jié)構(gòu)特征。通過(guò)在遼河油區(qū)部分井位潛山層位應(yīng)用此型號(hào)鉆頭,取得了較理想的效果,有效的解決了PDC鉆頭在極硬地層中先期崩齒導(dǎo)致鉆頭報(bào)廢的難題,實(shí)現(xiàn)了極硬地層PDC鉆頭鉆進(jìn)的可行性。
[Abstract]:The PDC bit has been widely used in the petroleum drilling industry. Compared with the cone bit, the PDC bit has the characteristics of more single ruler, higher mechanical drilling speed and safety and reliability than the cone bit in the soft to medium hard homogeneous formation. However, it is difficult to replace the cone bit completely with PDC bit in extremely hard formation. The buried hill strata in Liaohe oil area belong to the typical very hard strata, which are mainly divided into the Proterozoic buried hill and the Archean buried hill. The geological lithology is mainly composed of mixed granite, dolomite and diabase, and the lithology is hard, and the content of quartz is high. The abrasive and impact properties of the PDC bit are extremely high, and the damage to the PDC bit composite is very great. In this paper, the lithologic characteristics of buried hill formation in Liaohe oil area are analyzed, and the causes of premature damage of PDC bit composite sheet caused by extremely hard formation are analyzed. Through the 3D design of PDC bit, finite element analysis of bottom hole force, optimization of key parameters, The bottom hole simulation drilling analysis and other techniques have concluded that the 152.4mmPDC bit most suitable for buried hill formation in Liaohe oil area is a 5-blade 16mm composite plate with medium back dip angle and double row teeth. Through the application of this type of bit in some buried hill strata of Liaohe oil area, the better effect is obtained, and the problem of PDC bit disappearing in the extreme hard formation is effectively solved. The feasibility of PDC bit drilling in extremely hard formation is realized.
【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)】：TE921.1

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本文編號(hào)：2147240