一种新型多功能钻固一体工作液  

Studies of a New Multi-function Solidfiable Drilling Fluid

作　　者：焦少卿[1] 郭小阳[1] 李早元[1] 房志毅[1] 樊凌云 王威林[3] 

机构地区：[1]“油气藏地质及开发工程”国家重点实验室·西南石油大学,四川成都610500 [2]中石化西北油田分公司完井测试中心,四川成都 [3]成都理工大学能源学院,四川成都

出　　处：《钻井液与完井液》2008年第6期43-46,92-93,共4页Drilling Fluid & Completion Fluid

基　　金：四川省应用基础研究项目(编号为2007JY029-136)的部分内容

摘　　要：针对目前钻井工程面临的恶性漏失和絮凝虚泥饼无法固化的难题,研究出一种具有润湿、渗透、乳化、冲洗、固化功能于一体的特殊工作液。该工作液主要由黏土类增黏剂、纤维素衍生物增黏剂、木质素类稀释剂、表面活性剂、激活剂、固化剂和密度调节剂组成,介绍了其作用机理。性能评价结果表明,该工作液具有优良的悬浮能力和流变性以及很高的抗压强度、抗盐能力、对泥饼的冲刷能力和激活钻井液的能力,与钻井液、水泥浆的相容性好。它可作为一种可固化堵漏液使用,也可作为一种可固化滞留于界面上絮凝虚泥饼的前置液使用,能有效堵漏和提高固井质量,降低钻井成本,延长油井寿命,具有广阔的应用前景。A special working fluid integrating multiple functions such as wetting,permeable,emulsion,flushing and solidifiable,was developed for use in wells having severe mud losses and flocs mud cakes.It was composed of a clay(viscosifier),a cellulose derivative(viscosifier),a lignosulfonate(thinner),a surfactant,an activator,a solidifying agent,as well as an additive adjusting the density of the fluid.The working mechanism was introduced.Laboratory evaluation showed that this fluid had good suspending capacity and rheology,as well as high compressive strength,salt tolerance,cake flushing and activation capacity.It was compatible very well with other commonly used drilling fluids and cement slurries.It can be used as a solidfiable fluid controlling mud losses,or a preflush used to solidify the flocculated puffy mud cakes retained on bore hole walls.This fluid helped improve the cementing job quality.

关 键 词：井漏 堵漏钻井液 前置液 固井质量 

分 类 号：TE256.9[石油与天然气工程—油气井工程] TE282