發(fā)布時間：2018-03-18 14:29

  本文選題：頁巖氣　切入點(diǎn)：長寧　出處：《西南石油大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：長寧-威遠(yuǎn)是中石油第一個國家級頁巖氣示范區(qū),僅2016年示范區(qū)生產(chǎn)頁巖氣10.11×108m3,預(yù)測至2034年底長寧-威遠(yuǎn)累計產(chǎn)氣300×108 m3。雖然長寧-威遠(yuǎn)國家級頁巖氣示范區(qū)的勘探開發(fā)取得了長足的發(fā)展,但鉆井周期長、機(jī)械鉆速慢和井下復(fù)雜情況多發(fā)等因素嚴(yán)重制約了長寧-威遠(yuǎn)區(qū)塊頁巖氣的勘探開發(fā)速度。本文在系統(tǒng)分析長寧-威遠(yuǎn)頁巖氣區(qū)塊工程地質(zhì)特征和完鉆井實(shí)鉆分析的基礎(chǔ)上,梳理出長寧-威遠(yuǎn)區(qū)塊頁巖氣鉆井面臨的重點(diǎn)難點(diǎn)�；诖�,提出了長寧-威遠(yuǎn)區(qū)塊頁巖氣鉆井綜合提速技術(shù)措施,內(nèi)容包括:井身結(jié)構(gòu)優(yōu)化設(shè)計、井工廠模式下的軌跡優(yōu)化設(shè)計、強(qiáng)研磨性PDC鉆頭優(yōu)選優(yōu)化、氣體鉆井及旋轉(zhuǎn)導(dǎo)向等鉆井提速配套技術(shù),并進(jìn)行了現(xiàn)場應(yīng)用,研究取得的主要認(rèn)識有:(1)長寧-威遠(yuǎn)區(qū)塊鉆井難點(diǎn)為:表層嘉陵江組、二疊系茅口組易漏;上部直井段地層易斜;茅口～棲霞地層研磨性強(qiáng),可鉆性差;韓家店～石牛欄地層泥漿條件下鉆速極低,PDC鉆頭易磨損;龍馬溪地層易垮塌;三維軌跡難控制,摩阻大,易托壓,定向效果差。(2)長寧區(qū)塊優(yōu)化后的井身結(jié)構(gòu)方案為:一開Φ762 mm(鉆頭)+Φ720 mm(套管)嘉陵江組,二開Φ406.4 mm(鉆頭)+Φ339.7 mm(套管)飛仙關(guān)頂,三開0311.2 mm(鉆頭)+Φ244.5 m(套管)韓家店頂,四開0215.9 mm(鉆頭)+Φ139.7mm(套管)龍馬溪底。威遠(yuǎn)區(qū)塊:一開Φ660.4mm(鉆頭)+Φ508mm(套管)沙溪廟,二開Φ406.4 mm(鉆頭)+Φ339.7mm(套管)涼高山頂,三開Φ311.2mm(鉆頭)+Φ244.5mm(套管)龍馬系頂,四開Φ215.9mm(鉆頭)+Φ139.7mm(套管)龍馬溪底。(3)將常規(guī)的三維軌跡優(yōu)化為雙二維軌跡,不僅使得水平井的軌跡易控制,還能夠有效防碰和降低摩阻。(4)長寧區(qū)塊PDC鉆頭優(yōu)選結(jié)果為:CK505(飛仙關(guān)-長興),FX55(龍?zhí)?梁山),MM55(龍馬溪);威遠(yuǎn)區(qū)塊為:T1655(沙溪廟-須家河),MSi616(雷口坡-嘉陵江),SF56(飛仙關(guān)-龍?zhí)?,MDsi613(茅口-梁山),HCD506ZX(龍馬溪)。(5)綜合提速配套技術(shù)措施為:表層采用PDC+螺桿+鉆井液/氣體鉆打快技術(shù);采用PDC+彎螺桿+MWD技術(shù)進(jìn)行斜直井段的快速鉆進(jìn);將井工廠的三維井眼軌跡優(yōu)化為雙二維軌跡(斜直井+定向井/水平井),將研磨性差的韓家店～石牛欄地層優(yōu)化成斜直井段鉆井,采用氮?dú)忏@井提速;造斜段采用旋轉(zhuǎn)導(dǎo)向、水平段采用優(yōu)選PDC鉆頭+旋轉(zhuǎn)導(dǎo)向/耐油螺桿(帶水力震蕩器)進(jìn)行防塌打快;儲層龍馬溪易漏地層采用控壓鉆井技術(shù)。綜合提速技術(shù)應(yīng)用效果顯著,與提速前相比,平均周期降低了 18天,平均鉆速提高了58%。長寧-威遠(yuǎn)區(qū)塊頁巖氣綜合提速技術(shù)措施的應(yīng)用,為國家級頁巖氣示范區(qū)的安全經(jīng)濟(jì)高效開發(fā)提供了保障。
[Abstract]:Changning-Weiyuan is PetroChina's first national shale gas demonstration zone, Only in 2016, 10.11 脳 108m3 shale gas was produced in the demonstration area, and the cumulative gas production of Changning Weiyuan was predicted to be 300 脳 108m3 by end of 2034. Although the exploration and development of Changning Weiyuan National Shale Gas demonstration area has made great progress, the drilling period is long. The slow drilling speed and complex downhole conditions seriously restrict the exploration and development speed of shale gas in Changning-Weiyuan block. Based on the systematic analysis of the engineering geological characteristics of Changning-Weiyuan shale gas block and the analysis of real drilling, Combing out the key points and difficulties faced by shale gas drilling in Changning-Weiyuan block. Based on this, the comprehensive speedup technical measures for shale gas drilling in Changning-Weiyuan block are put forward, which include: optimum design of wellbore structure, The trajectory optimization design in well factory mode, the optimization of PDC bit selection and optimization, gas drilling and rotary steering drilling speed raising matching techniques are carried out in the field. The main knowledge obtained from the study is that the difficulties of drilling in Changning Weiyuan block are: the surface Jialing River formation, the Permian Maokou formation easy to leak, the upper vertical well formation easy to deviate, the Maokou-Qixia formation having strong abrasive property and poor drillability; Under the condition of Hanjiadian ~ Shi Niulan formation mud, PDC bit with extremely low drilling speed is easy to wear; Longmaxi formation is easy to collapse; 3D trajectory is difficult to control, friction is large, easy to support pressure, The optimized well structure scheme of Changning block is as follows: one opening 桅 762mm (bit) 桅 720mm (casing) Jialingjiang formation, two opening 桅 406.4 mm (drill bit) 桅 339.7 mm (casing) Feixianguanding, three opening 0311.2 mm (drill bit) 桅 244.5 m (casing) Hanjiadian Ding, Open 0215.9 mm (bit) 桅 139.7mm (casing) Longmaxi bottom. Weiyuan Block: open 桅 660.4mm (bit) 桅 508mm (casing) Shaximiao, second open 桅 406.4 mm (bit) 桅 339.7mm (casing) Liangshan roof, Sankai 桅 311.2mm (bit) 桅 244.5mm (casing) Longma system top, Four open 桅 215.9mm (drill bit) 桅 139.7mm (casing) Longmaxi bottom. 3) the conventional three-dimensional trajectory is optimized to double two-dimensional trajectory, which not only makes the trajectory of horizontal well easy to control, The optimum selection result of PDC bit in Changning block is: 1 CK505 (Feixianguan-Changxing FX55 (Longtan Liangshan FX55); Weiyuan block is: T1655 (Shaximiao-Xujia River) MSi616 (Leikoupo-Jialing River F56 (Feixianguan-Longlong). The technical measures of comprehensive speed raising are as follows: the PDC screw drilling fluid / gas drilling technique is used in the surface layer; The PDC bending screw MWD technology is used for the rapid drilling of inclined straight section. The 3D borehole trajectory of the well factory is optimized as two dimensional trajectory (directional well / horizontal well with inclined vertical well), and the formation of Hanjiadian ~ Shi Niulan formation with poor abrasive property is optimized to be drilled in oblique straight section, and the speed of drilling is increased by nitrogen gas, and the direction of rotation is adopted in the diagonal section. In the horizontal section, PDC bit rotation guide / oil resistance screw (with hydraulic oscillator) is used to prevent sloughing and beating quickly, and the controlled pressure drilling technique is used in the reservoir Longmaxi easy leakage formation. The application effect of the comprehensive speed raising technique is remarkable, compared with that before the speed increase. The average cycle is reduced by 18 days and the average drilling speed is increased by 58. The application of comprehensive speed raising measures of shale gas in Changning-Weiyuan block provides a guarantee for the safe economic and efficient development of national shale gas demonstration area.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TE243

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 樂守群;王進(jìn)杰;蘇前榮;常合磊;陳林;;涪陵頁巖氣田水平井井身結(jié)構(gòu)優(yōu)化設(shè)計[J];石油鉆探技術(shù);2017年01期

2 肖洲;;氣體鉆井技術(shù)在長寧頁巖氣區(qū)塊的應(yīng)用[J];鉆采工藝;2016年03期

3 白t，

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