摘要
张海39-39Z分支井是大港油田第一口真正意上的四级分支井。根据该地区地层特性,综合考虑该井的井身结构、工艺特点、分支井眼工序复杂、保护油气层以及环境保护对钻井液的要求等,结合以往该地区钻井所用钻井液体系应用效果及其现场技术,张海39-39Z分支井在主井眼一开浅地层采用膨润土-聚合物钻井液钻进,二开明化镇组采用聚合物钻井液、进入馆陶组转化为硅基防塌钻井液钻进,主井眼三开及分支井眼均采用有机盐钻井液钻进,较好地满足了分支井不同阶段钻井与其它作业施工要求,钻井液性能稳定,效果明显。该井以合理的流变性能解决了井眼净化问题,以控制合理的有机盐含量和膨润土含量保证了钻井液抑制性、稳定性问题,运用合理的钻井液密度等解决了井壁稳定问题,为今后采用常规钻井液体系及其现场技术完成类似分支井作业提供了借鉴意义。
The well Zhanghai 39-39Z is a real level-4 multilateral well drilled in Dagang Oilfield.A drilling fluid program for the three intervals of the main bore was designed based on several factors such as:the lithology of the formation to be drilled,the hole profile,drilling techniques adopted,the complexity of the multilateral well drilling,reservoir protection,environment protection,and drilling fluid application and performance in offset wells etc.The first interval of the main bore was drilled with bentonite-polymer drilling fluid.The second interval was drilled with polymer drilling fluid in the Minghuazhen formation and organosilicon inhibitive drilling fluid in the Guantao formation.The third interval and the laterals were drilled with organic salt drilling fluid.These drilling fluids satisfied the needs of drilling and other jobs,and had stable properties during drilling.Good mud rheology helped borehole cleaning.Organic salt and bentonite at reasonable concentrations in the mud ensured inhibitive capacity and stability of the drilling fluids.Borehole wall stability was obtained using reasonable mud weights.Drilling fluid operation on the well Zhanghai 39-39Z has provided a good technical clue to the drilling of other similar multilateral wells with regular drilling fluid formulations.
作者
白殿刚
陈秋睿
安鹏
王占厂
张连水
管叶平
杨冀平
BAI Diangang;CHEN Qiurui;AN Peng;WANG Zhanchang;ZHANG Lianshui;GUAN Yeping;YANG Jiping(The Fourth Oil Production Plant of CNPC Dagang Oil Field,Tianjin 300280;CCCC Marine Construction&Development Co.,Ltd,Tianjin 300451;The Third Drilling Company of CNPC Bohai Drilling Engineering Co.,Ltd,Tianjin 300280;Engineering Technology Research Institute,BHDC,Tianjin 300451)
出处
《钻井液与完井液》
CAS
北大核心
2020年第4期494-497,共4页
Drilling Fluid & Completion Fluid
关键词
张海39-39Z
埕海油田
分支井
有机盐钻井液
井壁稳定
Well Zhanghai39-39z
Chenghai oilfield
Multilateral well
Organic salt drilling fluid
Borehole wall stabilization
