第33卷第3期 2016年5月
钻井液与完井液
DRILLINGFLUID&COMPLETIONFLUID
doi:10.3696/j.issn.1001-5620.2016.03.012
Vol.33 No.3 May2016
辽东湾探井用改性天然高分子钻井液技术
侯岳，班士军，赵云龙（天津中油渤星工程科技有限公司，天津300451）
侯岳等.辽东湾操井用改性天然高分子钻井液技术[].钻并液与完并液，2016，33（3)：60-63.
摘要DS4井是一口位于游海北部辽东湾海域的区城探井。针对DS4井裸眼段长、地质条件复杂、钻通油气层位多的情况，在对钻井液抑制性、封堵性、保护油气层作用机理进行分析的基础上，对改性天然高分子钻并液进行了配方优选。实验结果表明，在改性天然高分子钻并液中引入强抑制剂AP-1和封堵剂DLP后，钻井液具有良好的抑制性和封堵性，防止了DS4井上部明化镇组、馆陶组高渗透地层的漏失，在较低的密度下确保了下部东管组泥岩地层的井壁稳定，实现了安全快速钻井；具有优良的润滑能力，在DS4井二开裸眼疫长3131m、位移大（1060m）、最大井斜达到34.5°的情况下，成功地实现了电测一次成功率100%；钻井液具有低荧光特性，能够及时地发现油气层；具有优良的油层保护效果，DS4 井在东营组发现了良好的油气显示，并在试油阶段获得了高产的工业油流。
关键词改性天然高分子钻井液；井眼稳定；地层损害；抑制性；封堵性
中图分类号：TE254.3
文献标识码：A
文章编号：1001-5620（2016）03-0060-04
Modified Natural PolymerDrillingFluid Used in ExplorationWells in theGulf of Liaodong
HOU Yue, BAN Shijun, ZHAO Yunlong
(TianjinChinaPetroleumBoxingEngineeringTechnologyCo.,Lid.,Tianjin300451)
Abstract The well DS4 is an areal exploration well located in the offshore GulfofLiaodong in the north Bohai Sea. The well DS4, a long open-hole well, penetrated formations with complex geology and many oil and gas bearing zones. Based on the studies on the inhibitive capacity and plugging capacity of the drilling fluid, as well as reservoir protection mechanism, a modified natural polymer drilling fluid was optimized. The results of the laboratory experiments have revealed that the inhibitive capacity and the plugging capacity of the drilling fluid are greatly enhanced after treatment with the strong shale inhibitor AP-1 and the plugging agent DLP. Using this modified natural polymer drilling fluid, mud losses previously occured in drilling the highly permeable Minghuazhen formation and Guantao formation were minimized, and the borehole wall instability in drilling the lower Dongying formation (shales) was brought under control with lower mud weights, realizing safe and fast drilling. This drilling fluid has good lubricity; in the second interval, which has length of 3,131 m, horizontal displacement of 1,060 m and well angle of 34.5 °C, the wireline logging was 100% successful, with oseaeaeaoeoaaraoaosnoseoa reservoir protection ability; the well DS4 had good oil shows, and high production rate was obtained during well testing
Keywords Modified natural polymer drilling fluid; Borehole wall stabilization; Formation damage; Inhibitive capacity; Plugging capacity
DS4井是位于渤海湾盆地辽东湾坳陷辽中凹陷走滑断裂带东升4号构造东升4断块的1口预探操井，目的是为了预探该区块馆陶组和东营组地层的油气情况。该井为二开定向井，二开设计裸眼段长2677m、井底位移为686m，且二开井段涵盖了明化镇组、馆陶组和东营组3个地层，裸眼段长
且钻遇多个油气层，海洋钻探安全风险大；同时二开井段对钻井液的油层保护、携砂、润滑提出了更高的要求。因此，以提高现有的天然高分子钻井液的抑制性和封堵性为重点，通过优选抑制剂和改善滤饼封堵剂，形成了改性天然高分子钻井液技术。 DS4并应用该钻井液技术，在二开裸眼段加深至
第一作者简介：侯岳，工程师，1985年生，2007年毕业于中国石油大学（华东）应用化学专业，现从事现场钻井液
技术服务工作。电话13612172285；E-mail：hyue1985@163.com。万方数据