充气钻井液与MTC堵漏技术在ZG10-G1深井的应用  

Application of aerated drilling fluid and MTC plugging technology in deep well ZG10-G1

作　　者：杨景利[1] 何兴贵[1] 薛玉志[1] 巩呈祥[1] 乔军[1] 王军义[1] 严新新[1] 魏清平[1] 何九辉[1] 

机构地区：[1]胜利石油管理局

出　　处：《钻井液与完井液》2003年第4期52-54,共3页Drilling Fluid & Completion Fluid

摘　　要：胜利油田桩西潜山奥陶系以下地层孔洞-裂缝发育,地层压力系数较低(0.56～0.88),钻井过程中经常发生严重井漏问题。ZG10-G1井二开使用聚合物磺化防塌钻井液钻井;三开使用密度为1.03 g/cm3的聚合醇正电胶钻井液钻进,并采用MTC堵漏技术,同时配合钻井液充氮气技术,较好地解决了超深井的井漏问题。现场应用表明,MTC具有良好的触变性、稠化时间可调范围大、强度高,工艺简单,适合深井孔洞-缝隙低压漏失地层的堵漏;利用充氮钻井技术有效地解决了井漏问题,提高了钻井时效,充氮技术降低了当量循环密度,提高了环空返速和机械钻速;聚合醇正电胶防塌润滑钻井液具有良好的高温润滑性能,抗温可达180℃,满足了超深井的钻井液充氮气要求。In layers deeper than the Ordovician system of Shengli oilfield, severe lost circulation often occur during drilling operation due to existence of mature cavern fissure system and lower formation pressure factor (0. 56-0. 88). In well ZG10-G1, a polymer sulfonated collapse prevention drilling fluid was used in 311. 1 mm hole. In 215. 9 mm hole, polyol and positive colloid drilling fluid aerated with Nitrogen (density is 1. 03 g/cm3) was used, associated with MTC plugging technology. Application in field demonstrates that using MTC technology, the fluid has excellent thixotropic property, wide range of thickening time for adjustment, and the stone possesses high pressure strength. Operation of MTC onsite is simple, completely suitable for plugging carven fissure layers at low pressure in deep well. By employing Nitrogen aeration in drilling fluid technology, the problem of lost circulation was effectively avoided, and equivalent circulation density of fluid was reduced and drilling rate also increased. The polyol and positive colloid drilling fluid system exhibits prominent lubricity at high temperature (180 ℃), meeting requirements of Nitrogen aeration in drilling fluid in ultra-deep well.

关 键 词：充气钻井液 MTC堵漏技术 ZGIO—G1深井 应用 井漏 充氨气 低密度钻井液 

分 类 号：TE254[石油与天然气工程—油气井工程] TE28