低密度水包白油钻井液在潜山欠平衡钻井中的应用  

The Application of a Low Density Oil-in-Water Drilling Fluid in Under-balanced Drilling in Buried Hill Structures

作　　者：吕传炳[1] 孟庆立 张国兴 李海彪 温建平 郝惠军 喻化民 王凤宇 刘德庆 刘彦妹 刘庆玲 

机构地区：[1]中国石油大学资源学院 [2]渤海钻探钻井工艺研究院 [3]渤海钻探第五钻井公司

出　　处：《钻井液与完井液》2009年第3期32-34,共3页Drilling Fluid & Completion Fluid

摘　　要：华北油田潜山油藏埋藏深,井下温度高,地层压力系数低。为满足该油藏欠平衡钻井的需要,研究出了高油水比水包白油钻井液。经现场应用表明,该钻井液性能稳定,最低密度为0.86g/cm3,具有强抑制性和防泥岩坍塌能力,与清水的相对膨胀率仅为9.84%,抗温达180℃,抗污染能力好,对储层的损害小,渗透率恢复值大于94%,且较纯油基钻井液成本低,对环境污染小。长6、任东2和衡6探井通过应用该低密度水包白油钻井液,实现了欠平衡钻井,顺利钻穿漏失严重的潜山储层,较好地保护了储层,同时解决了钻井液的抗高温和荧光干扰问题,满足了探井施工录井的要求。The buried hill reservoirs in North China area are deeply buried,and have a high bottom hole temperature and a low formation pressure.An oil-in-water drilling fluid formulated with high concentration of white oil was designed to drill this reservoir.The fluid has a density of 0.86 g/cm3,and is highly inhibitive.The shale core expansion rate is only 9.84% that of fresh water.This fluid is stable at a temperature of 180 ℃.Permeability recovery rate is greater than 94%.This drilling fluid has been used in several exploration wells such as Chang-6,Rendong-2 and Heng-6.Buried hill reservoir was successfully drilled and logged.

关 键 词：水包白油钻井液 低密度钻井液 欠平衡钻井 抗污染 抗温 低荧光 环境保护 潜山油藏 

分 类 号：TE254.3[石油与天然气工程—油气井工程]