胜科1井四开超高温高密度钻井液技术  

High Temperature High Density Drilling Fluid Technology for the Forth Interval of Well Shengke-1.

作　　者：李公让[1,2] 薛玉志[2] 刘宝峰[2] 蓝强[2] 

机构地区：[1]中国石油大学(华东) [2]胜利石油管理局钻井工艺研究院

出　　处：《钻井液与完井液》2009年第2期12-15,共4页Drilling Fluid & Completion Fluid

基　　金：863项目"超深井钻井技术"子课题"超高温高压条件下钻井液技术研究"(2006AA06A109)资助

摘　　要：胜科1井井深超过7 000 m,井底温度为235℃,压力超过100 MPa。该井地层情况复杂,存在盐岩、泥页岩及盐膏泥混层,钻井液性能难以调控。该井四开(4 155～7 026 m)钻进使用了聚磺封堵防塌钻井液、高密度聚磺非渗透钻井液和超高温钻井液。应用结果表明,这3种钻井液的高温稳定性、润滑性和剪切稀释特性良好,在高固相情况下仍具有良好的流变性和低的高压滤失量,能经受住各种可溶性盐类及高价离子的污染,配制和维护处理方便,各种钻井液之间的转换非常顺利,没有出现任何井下复杂情况。该套钻井液技术有效地保证了胜科1井的安全、快速钻进。Well Shenke-1 is an exploration well with a completion depth of greater than 7,000 m, a bottom hole temperature of 235 ℃, and bottom hole pressure greater than 100 MPa. Formations containing salt, shale and mixed gypsum/shale/salt were penetrated. Three drilling fluid formulations were applied in the fourth interval of this well. Field operation showed that these drilling fluids (polymer sulfonates inhibitive drilling fluid, high density polymer sulfonates ultra-low filtration rate drilling fluid, and ultra-high temperature drilling fluid) had very good high temperature stability, lubricity and shear-thinning properties. Effective rheology control can be easily achieved even at high solids content. Also found in field application were the tolerance to salt contamination and easy-to-formulate characteristics of these fluids.

关 键 词：超深井 超高温 高密度钻井液 水基钻井液 钻井液流变性 井眼稳定 胜科1井 

分 类 号：TE254.3[石油与天然气工程—油气井工程]