FLAT-PRO深水恒流变合成基钻井液及其应用
发布时间：2018-10-16 17:41
【摘要】：深水钻井面临低温、安全密度窗口窄、浅层气易形成气体水合物、井壁易失稳等技术难题,对深水钻井液提出了更高的要求。以Saraline 185V气制油为基油,通过优选乳化剂、有机土、降滤失剂及其他处理剂,构建了一套适合深水钻井的FLAT-PRO深水恒流变合成基钻井液体系。综合性能评价结果表明:该钻井液在4~65℃下流变性能稳定,具有恒流变特性,能有效保护储层,其渗透率恢复值大于90%,能抗10%海水、15%钻屑污染,易降解,满足环保要求。南海LS-A超深水井水深为1 699.3 m,预测主要目的层温度为34.6~36℃,φ508 mm套管鞋处的地层承压能力系数低于1.14,安全密度窗口窄,如何控制ECD值、预防井漏是该井的作业控点,因此选择密度为1.03 g/cm~3的FLAT-PRO钻井液开钻。钻进过程中,使用FSVIS调整流变性,维护黏度在50~70 s,动切力在8~15 Pa,φ6读数为7~15,φ_3读数为6~12,用2%PF-HFR控制滤失量,应用井段起下钻顺利,电测顺利,井径规则,没有出现任何复杂情况。应用结果表明,FALT-PRO深水恒流变合成基钻井液在不同温度下的流变性能稳定,抑制性好,润滑性强,能获得较低的ECD值,满足深水钻井的要求。
[Abstract]:Deep-water drilling is faced with some technical problems such as low temperature, narrow safe density window, gas hydrate formation in shallow layer gas and instability of borehole lining, which puts forward higher requirements for deep water drilling fluid. A set of FLAT-PRO deepwater constant flow synthetic base drilling fluid system suitable for deep water drilling was constructed by using Saraline 185V gas as the base oil, through the optimal selection of emulsifier, organic soil, filtration reducer and other treatment agents. The comprehensive performance evaluation results show that the drilling fluid has stable rheological properties at 465 鈩，
本文编号：2275144
[Abstract]:Deep-water drilling is faced with some technical problems such as low temperature, narrow safe density window, gas hydrate formation in shallow layer gas and instability of borehole lining, which puts forward higher requirements for deep water drilling fluid. A set of FLAT-PRO deepwater constant flow synthetic base drilling fluid system suitable for deep water drilling was constructed by using Saraline 185V gas as the base oil, through the optimal selection of emulsifier, organic soil, filtration reducer and other treatment agents. The comprehensive performance evaluation results show that the drilling fluid has stable rheological properties at 465 鈩，
本文编号：2275144
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