大港板南储气库白6库1井尾管固井技术  

Technology for Liner Cementing in Well 1 of Storage Bai-6, Bannan, Dagang

作　　者：靳建洲 解文 张华[1] 王贵富 周子棠 

机构地区：[1]中国石油集团钻井工程技术研究院 [2]中国石油集团大港油田公司油气藏评价事业部 [3]中国石油集团渤海钻探工程有限公司第二固井分公司 [4]天津石油职业技术学院石油工程系

出　　处：《钻井液与完井液》2014年第6期58-61,100,共4页Drilling Fluid & Completion Fluid

摘　　要：储气库井白6库1井尾管固井存在地层承压能力低、封固段长、井径不规则及井筒承载着交变应力及温度变化等难题。设计通过采取承压堵漏、优化浆柱结构实现平衡压力固井,并引入DRE膨胀韧性水泥浆体系。优化浆柱结构措施有,降低冲洗隔离液密度(低于钻井液密度),增加冲洗隔离液用量(占环空高度800 m);采用双凝水泥浆体系。高效冲洗隔离液使用开发出的兼有疏水性官能团和亲水性官能团的油基钻井液冲洗液DRY-100L作主剂,并使用棱形加重材料DRW-2S,加强了对二界面的冲击力。DRE水泥浆具有良好的综合性能,2 d、7 d抗压强度分别大于16、28 MPa,弹性模量小于6.0 GPa/7 d,韧性改造使其具有"高强度低弹性模量"特性,为该配套技术的推广应用奠定基础,为固井质量的提高提供技术保障。现场固井结果表明,通过采用该膨胀韧性水泥浆进行平衡压力固井,施工顺利,固井质量优质。Well 1 is a well for gas storage, and its liner section penetrated formations with low pressure bearing. This well has a long cementing length and irregular hole sizes. In gas injection and production, the borehole experienced alternate stress and temperature change, which damaged the integrity of cement sheath and further caused annular space to bear pressures. To solve this problem, loss control under pressure, optimization of cement slurry to achieve cementing under balanced pressure, and introduction of DRE cementing slurry were all performed. The set cement of the cement slurry has compressive strength of 16 MPa after 48 hours of thickening, and 28 MPa after 7 days of thickening, elastic modulus of 6.0 GPa measured after 7 days. The φ177.8 mm liner cementing of Well 1 of gas storage Bai-6 was successful using this 'High Strength Low Modulus' cement slurry.

关 键 词：平衡压力 韧性水泥石 隔离液 储气库 固井 

分 类 号：TE256.3[石油与天然气工程—油气井工程]