某大斜度丛式井组井眼轨道设计及轨迹控制方案

发布时间：2018-09-19 19:00

【摘要】：XX区块所有定向井均为双靶点大斜度定向井,且井底水平位移、目标段长度均比较大,井口平台的井口槽间距也比较小。实钻资料分析表明该区块地层岩性多为灰岩、白云岩以及白云质灰岩,最突出的钻井风险是井漏、卡钻及H2S,与之对应层段为上部Asmari、Jahrum、Sachun及中下部Dashtak地层。综合考虑上部井段防碰要求、复杂地层及井身结构设计方案,完成了井眼轨道设计方案优化。水平位移相对较小的定向井,适合选择双增式轨道设计方案。水平位移相对较大的定向井,以有利于降低钻井风险、提高钻井速度为原则,提出了3种轨道设计优化方案。首选方案为“直井段-增斜段-微增斜段1-稳斜段1-微增斜段2-稳斜段”,其次为“直井段-增斜段-稳斜段1-微增斜段-稳斜段2”;再次为“直井段-增斜段1-稳斜段1-增斜段2-稳斜段2”。此外,还完成了防碰扫描分析工作。综合考虑了该区块的井身结构及轨道设计方案,完成了不同开次及井段类型的钻具组合设计(含螺杆钻具设计)及钻进参数优选工作,各包括两套套导向钻具组合设计和两套单稳定器钻具组合设计。
[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.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE24

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