CAJ | 학술논문

为提高胜利油田非常规油气区块水平井水平段的固井质量和压裂效果，针对该类水平井水平段应用常规刚性扶正器时套管下入困难、居中差等问题，研制开发了内置滑套式、易下入、能撑开防止退、扶正力强且满足非常规油气区块高压压裂的φ139.7 mm液压扶正器。采用双级球座＋液压扶正器套管组合、投球胀封的方式，同时对液压扶正器管串的下入摩阻、固井质量进行了分析。该液压扶正器在胜利油田非常规油气区块进行了现场应用，结果表明，带液压扶正器完井管串的下入摩阻小于带刚性扶正器完井管串的下入摩阻，提高了水平段的固井质量，可为非常规油气井固井提供技术支持。
위제고성리유전비상규유기구괴수평정수평단적고정질량화압렬효과，침대해류수평정수평단응용상규강성부정기시투관하입곤난、거중차등문제，연제개발료내치활투식、역하입、능탱개방지퇴、부정력강차만족비상규유기구괴고압압렬적φ139.7 mm액압부정기。채용쌍급구좌＋액압부정기투관조합、투구창봉적방식，동시대액압부정기관천적하입마조、고정질량진행료분석。해액압부정기재성리유전비상규유기구괴진행료현장응용，결과표명，대액압부정기완정관천적하입마조소우대강성부정기완정관천적하입마조，제고료수평단적고정질량，가위비상규유기정고정제공기술지지。
To resolve difficulties and poor centralization in running casing with conventional rigid cen-tralizers ,improve the cementing quality and guarantee fracture effect in long horizontal well of unconven-tional well ,the φ139.7 mm hydraulic centralizer had been developed which ,different from the domestic lamination core and small size centralizer ,features easy running ,self-locking ,high centralizing strength ,and could meet the high pressure fracturing demands of unconventional well .It had been applied in unconven-tional block of Shengli Oilfield by the mode of double ball seat +hydraulic centralizer string and ball drop-ping expansion technique ,the friction of hydraulic centralizer on drill string and cementing quality were an-alyzed ,which proved that friction on hydraulic centralizer string was completely below that on rigid central-izer string ,hydraulic centralizer could greatly improve cementing quality of horizontal section ,and it pro-vided strong technical support for unconventional well cementing .