高性能油基钻井液的研制及在彭页3HF井的应用  

Researh on High Performance Oil-Based Drilling Fluid and It's Application on Well Pengye3HF

作　　者：何恕[1] 李胜[1] 王显光[1] 林永学[1] 李舟军[1] 

机构地区：[1]中国石化石油工程技术研究院

出　　处：《钻井液与完井液》2013年第5期1-4,95,共4页Drilling Fluid & Completion Fluid

基　　金：中国石化科技开发重点项目"页岩气藏水平井油基钻井液技术研究"(P11053)

摘　　要：彭页3HF井为一口页岩气评价井，水平段长1150m，三开龙马溪组页岩黏土矿物含量高达30．05％，以伊利石和伊／蒙混层为主，且页岩微裂缝发育，对钻井液性能要求高。研制出了能增强油水两相乳化效果的大分子乳化剂和新型提切剂，新型提切剂通过电性作用可增强油水界面膜的强度，减少分散相的团聚几率，能与乳化剂协同增效，进一步提升体系乳化稳定性；结合优选的改性褐煤降滤失剂SMFLA-O和封堵剂SMRPA、SMFibre-O等，形成了一套高性能油基钻井液。该油基钻井液在该井三开钻进期间，塑性黏度为20～28mPa·S，动切力为10～15Pa，表现出低黏高切的流变性；破乳电压高，性能稳定；封堵防塌能力强，无剥落、掉块现象，且钻井液消耗量低；井眼清洁、无岩屑床，摩阻、扭矩低，无托压现象，确保了该井顺利完钻，累计进尺1815m。Some problems are encountered in the third interval of well Pengye3HF,such as wellbore instability,high fiction,high torque and borehole cleaning,to deal with these problems,a kind of high performance oil-based drilling fluid system is developed based on self-developed agents macromolecule emulsifier and rheology modifier.The application if this oil-based drilling fluid system in build-up and horizontal section shows that it has good performances of low viscosity 20-28 mPa·s,high yield point 10-15 Pa,high emulsion breaking voltage,strong plugging capability,strong cutting carrying capability and good lubricity,so cuttings bed and hanging are not encountered while drilling.The well Pengye3HF is successfully drilled to 4,190 m,and the footage drilled with high performance oil-based drilling fluids is 1,815m including 1,150 m horizontal section.

关 键 词：页岩气井 油基钻井液 乳化剂 提切剂 钻井液配方 流变性 井眼稳定 

分 类 号：TE254.3[石油与天然气工程—油气井工程]