【摘要】：XX區(qū)塊所有定向井均為雙靶點大斜度定向井,且井底水平位移、目標(biāo)段長度均比較大,井口平臺的井口槽間距也比較小。實鉆資料分析表明該區(qū)塊地層巖性多為灰?guī)r、白云巖以及白云質(zhì)灰?guī)r,最突出的鉆井風(fēng)險是井漏、卡鉆及H2S,與之對應(yīng)層段為上部Asmari、Jahrum、Sachun及中下部Dashtak地層。綜合考慮上部井段防碰要求、復(fù)雜地層及井身結(jié)構(gòu)設(shè)計方案,完成了井眼軌道設(shè)計方案優(yōu)化。水平位移相對較小的定向井,適合選擇雙增式軌道設(shè)計方案。水平位移相對較大的定向井,以有利于降低鉆井風(fēng)險、提高鉆井速度為原則,提出了3種軌道設(shè)計優(yōu)化方案。首選方案為“直井段-增斜段-微增斜段1-穩(wěn)斜段1-微增斜段2-穩(wěn)斜段”,其次為“直井段-增斜段-穩(wěn)斜段1-微增斜段-穩(wěn)斜段2”;再次為“直井段-增斜段1-穩(wěn)斜段1-增斜段2-穩(wěn)斜段2”。此外,還完成了防碰掃描分析工作。綜合考慮了該區(qū)塊的井身結(jié)構(gòu)及軌道設(shè)計方案,完成了不同開次及井段類型的鉆具組合設(shè)計(含螺桿鉆具設(shè)計)及鉆進參數(shù)優(yōu)選工作,各包括兩套套導(dǎo)向鉆具組合設(shè)計和兩套單穩(wěn)定器鉆具組合設(shè)計。
[Abstract]:All the directional wells in XX block are double-target high-angle directional wells, and the horizontal displacement of bottom hole, the length of target section are all large, and the interval between wellhead grooves of wellhead platform is relatively small. The analysis of actual drilling data shows that the lithology of the formation in this block is mostly limestone dolomite and dolomite. The most prominent drilling risk is well leakage drilling and H _ 2s corresponding to the upper Asmari,Jahrum,Sachun and Dashtak formation in the middle and lower part of the formation. Considering the anti-collision requirement of upper well section, the design scheme of complex formation and wellbore structure is considered, and the design scheme of borehole track is optimized. The directional well with relatively small horizontal displacement is suitable for the design of double-increment track. In order to reduce drilling risk and improve drilling speed, three kinds of trajectory design optimization schemes are proposed for directional wells with relatively large horizontal displacement. The preferred scheme is "straight well section, inclined increasing section, small increase slope section 1-stable section 1-small increase section 2 stable section", followed by "straight well section-increasing section-stable section 1-small increase section-stable section 2"; The second one is "vertical well section-increasing slope section 1-stable slope section 1-increasing slope section 2-stable slope section 2". In addition, the analysis of anti-collision scanning is completed. The well structure and track design of the block are considered synthetically. The drilling tool combination design (including screw drill tool design) and drilling parameter optimization are completed for different opening times and well section types. Each includes two sets of guide drilling tool combination design and two sets of single stabilizer combination design.
【學(xué)位授予單位】：中國石油大學(xué)(華東)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE24

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