钻井液与完井液2017，Vol.34Issue(5)：8-13,6.DOI:10.3969/j.issn.1001-5620.2017.05.002
可循环微泡钻井液研究及其在乍得潜山地层的应用
Recyclable Micro Foam Drilling Fluid: Its Study and Application in Burial Hill Structure in Chad
摘要
Abstract
The burial hill structure in Chad has micro fractures that are quite developed and the formation pressure coefficient is generally less than 1.0. Using conventional drilling fluids, severe mud losses are inevitable. To avoid mud loss, recyclable micro foam drilling fluid has been adopted in burial hill drilling. This drilling fluid was first developed in laboratory with a high performance foaming agent GWFOM-LS, which also was also a foam stabilizer. GWFOM-LS is resistant to high temperature (130 ℃), high salinity (10％ NaCl) and high calcium (5000 mg/L). The micro foam drilling fluid developed has density adjustable between 0.70 g/cm3 and 0.96 g/cm3, and has been used successfully on the well Baobab C1-13 in Chad. The recyclable micro foam drilling fluid showed stable properties in field applications, good cuttings carrying capacity and reservoir protecting performance, satisfying the needs for safe drilling operation. Electric signal transmission through the foam was satisfactory, and severe mud losses in burial hill drilling were resolved. All these successes have laid a solid foundation for burial hill reservoir development.关键词
微泡钻井液/防漏堵漏/发泡剂/乍得Key words
Micro foam drilling fluid/Mud loss prevention and control/Foaming agent/Chad分类
能源科技引用本文复制引用
罗淮东,石李保,左京杰,史凯娇,宋举业..可循环微泡钻井液研究及其在乍得潜山地层的应用[J].钻井液与完井液,2017,34(5):8-13,6.基金项目
国家重大专项"深井超深井优质钻井液与固井完井技术研究"(2016ZX05020-004). （2016ZX05020-004）
