Abstract: The Sinopec "Shendi-1" project in Tarim Basin is characterized by the exploration and development of ultra-deep strike-slip fault-controlled oil and gas reservoirs. Yuejin block, located on the southern margin of Shaya uplift and adjacent to the northern part of the Shuntuoguole low uplift, develops three oil and gas enrichment belts primarily controlled by NE-trending strike-slip faults. This region is distinguished by its ultra-deep target formations (>7 000 m), high reservoir heterogeneity within fault zones, and surface coverage by poplar forest reserves. Despite breakthroughs in exploration since 2012 and more than a decade of production, there are still a large scale of untapped reserves. Great challenges are encountered in the geological engineering practices, and it is required to deepen the understandings of hydrocarbon accumulation and distribution patterns and achieve the efficient production of ultra-deep reservoirs beneath protected areas. Based on analyses of the regional fault-controlled hydrocarbon accumulation conditions and faults, as well as three-dimensional reservoir characterization in the well area, the geological study has identified the distribution of oil and gas reservoirs and untapped reserves, thus optimizing target selection. From an engineering perspective, solutions to the difficulties of ultra-deep layer and ultra-long displacement during well completion mainly include optimization of borehole trajectory design and control, borehole cleaning, stable large-inclination and long-open borehole, as well as the technologies of accelerating drilling operations and safe casing running. These techniques can enable the successful completion of Well Yuejin 3-3XC, which has obtained high-yeld oil and gas flow during testing. The well has set a domestic record with a measured depth of 9 432.55 m(slant)/ 7 212.53 m (vertical)and a horizontal displacement of 3 439.34 m, marking it as a landmark case in geological and engineering practices for complex ultra-deep reservoirs.

Key words: Tarim Basin, ultra-deep, fault-controlled reservoirs, ultra-long displacement, practices of geological and engineering integration, hydrocarbon accumulation, efficient production

摘要： 塔里木盆地中国石油化工股份有限公司“深地一号”工程以超深层走滑断控型油气藏的勘探开发为特色。跃进区块位于沙雅隆起南缘,紧邻顺托果勒低隆北部,发育3条受NE向走滑断裂带控制为主的油气富集带,具有“目的层埋深大(>7 000 m)、断裂带内部储层非均质性强、地表胡杨林保护区覆盖”的特点。自2012年勘探突破后,历经十多年开采仍存在较大规模未动用储量。深化油气成藏与分布规律认识,实现保护区之下超深层油气藏高效动用,是地质与工程融合实践面临的重大挑战。基于对区域断控型油气成藏条件分析,以及井区断裂解析和储集体立体刻画研究,在地质上明确油气藏与未动用储量分布,优选设计靶区;工程上根据超深层超长位移成井难点,采取井眼轨道优化设计与轨迹控制、井眼清洁、大斜度长裸眼井壁稳定、钻井综合提速技术及套管安全下入等工程技术手段,保障跃进3-3XC井顺利完钻并测试获高产油气流,且井(斜)深为9 432.55 m、垂深为7 212.53 m、水平位移为3 439.34 m,成为超深层复杂油气藏地质与工程融合实践的典型案例。

关键词: 塔里木盆地, 超深层, 断控型油气藏, 超长位移, 地质与工程融合实践, 成藏富集, 高效动用