新型抗高压堵漏剂的研究与评价  

Study and Evaluation of a New High Pressure Lost Circulation Material

作　　者：冯素敏[1] 罗向东[1] 马光长[2] 申威[2] 郑有成[3] 

机构地区：[1]北京奥凯立科技发展有限责任公司 [2]四川石油管理局钻采工艺技术研究院 [3]中国石油西南油气田分公司勘探事业部

出　　处：《钻井液与完井液》2007年第4期24-27,共4页Drilling Fluid & Completion Fluid

摘　　要：介绍了一种新型抗高压堵漏剂OCL-GYDL,该堵漏剂由多种不同的聚合物和起架桥支撑、膨胀变形的多种颗粒组成,采用化学堵漏与颗粒桥接堵漏相结合的方法研制而成,其特点在于其延时膨胀性和多种尺寸颗粒的存在,具有一定的黏弹性及较高的抗压强度,形成凝胶的时间可调,并可根据漏层的情况,调配颗粒大小,适用于大漏、返出量太少的裂缝性、溶洞性、破碎性地层,以及漏失位置不好确定的漏层。该剂在四川分水1井的应用中取得了良好的堵漏效果,平均一次性堵漏成功率达75%。This paper introduces a new high pressure lost circulation material(LCM),OCL-GYDL,made from several polymers and bridging,deformable particles.OCL-GYDL controls mud losses in two mechanisms: chemical and bridging.OCL-GYDL expands in the well with a specific time lag,thus makes the time required for the formation of a gel adjustable.The sized deformable particles in the LCM render it a viscous elasticity and compressive strength.The time lag and the particle sizes can be changed according to the type and the rates of mud losses.OCL-GYDL can be used in control mud losses into fractures,vugs,and friable formations,and lost circulation zones which are difficult to locate. OCL-GYDL was successfully applied in Well Fenshui-1 in Sichuan Oilfield,75% of the mud losses were stopped at the first use of this LCM.

关 键 词：堵漏剂 恶性漏失 高压 延时膨胀 钻井液添加剂 

分 类 号：TE254.4[石油与天然气工程—油气井工程] TE282