无固相钻井液技术在安棚油田的应用  

Application of solids free drilling fluid in Anpeng Oilfield

作　　者：肖俊峰[1] 李振杰[1] 刘中信[1] 

机构地区：[1]河南石油勘探局

出　　处：《钻井液与完井液》2002年第6期77-79,共3页Drilling Fluid & Completion Fluid

摘　　要：安棚油田埋藏深,储量少,因普通聚合物钻井液具有“三高一低”(指高固相、高粘切和低滤失量)特点,采用该钻井液钻井时,中上部砂砾岩井段机械钻速低,经常出现厚泥饼“小井眼”阻卡和渗透性漏失等井下复杂情况,使钻井综合成本居高不下,严重制约着该油藏的增贮上产。低固相、低粘度和低切力的无固相钻井液,在循环排量一定的情况下.冲刷井壁的能力较其它体系强,难以形成虚厚的泥饼和过大的液柱压力(包括激动压力),能够从根本上消除钻井施工中的厚泥饼阻卡问题,缓解砂砾岩的渗透漏失,最大限度地提高机械钻速。在现场应用7口井表明,通过采用FA367/KCl无固相钻井液技术,“小井眼”阻卡和渗透性漏失得到有效缓解,井下安全,起下钻、完井作业顺利;与本区块同类型井相比(平均井深为3300 m),机械钻速由原来的8.12 m/h提高到11.52 m/h,提高了44.6％以上,钻井周期由原来的48.28 d降低到现在的36.2 d,钻井成本大幅度下降。Because of the deep buried depth and small reservoirs of Anpeng oilfield, and in addition to the downhole troubles such as stuck pipe in the slim hole and lost circulations caused by improper use of polymer drilling fluid, the drilling cost was very high and thus iimited the development of the oilfield. The solids free drilling fluid, which is contrary with the polymer drilling fluid on its low solids content, low viscosity and low shearing force, has stronger borewall washing capability in a certain circulation displacement, and cannot form thick mud cake and high hydraulic column pressure, (including the activating pressure) , thus completely remove the problem of stuck pipe because of thick mud cake and minimize the permeable lost circulation, thus improve the penetration rate to the utmost. Field using of FA-367/KC1 solids free drilling fluid technology in seven wells were successfully, and compared with the same type of well (average depth of 3300 m) in this block, the penetration rate improved from 8. 12 m/h to 11. 52 m/h, which was about 44. 6% ; and the drilling period reduced from 48. 28 d to 36. 2 d, the drilling cost was dramatically cut down.

关 键 词：无固相钻井液 安棚油田 阻卡 机械钻速 小井眼 泥饼 漏失 砂砾岩 区块 井深 

分 类 号：TE254.3[石油与天然气工程—油气井工程] TE35