高聚物改性钻井液在复杂地层钻探施工中的应用  

Application of Polymer-modified Drilling Fluid in Complex Formation Drilling Construction

作　　者：袁华东 YUAN Huadong(The Sixth Geological Team of Hubei Geological Bureau,Xiaogan,Hubei 432100)

机构地区：[1]湖北省地质局第六地质大队,湖北孝感432100

出　　处：《中国煤炭地质》2023年第9期44-47,共4页Coal Geology of China

基　　金：湖北省自然资源厅地质勘查项目“湖北省广水市余店矿区白云岩矿普查”[2020]16号。

摘　　要：随着钻探工程向着复杂地层地区的发展,传统的植物胶钻井液难以满足护壁和取心的目的。本文研究了魔芋胶钻井液及微泡剂改性魔芋胶钻井液的滤失量、流变特性和防塌性能,结合某白云岩矿的现场取心对高聚物改性钻井液的护壁取心效果进行验证。研究发现:增加魔芋胶和微泡剂浓度均能提升钻井液的防滤失和流变特性;新型高聚物改性钻井液的最佳配比为水∶魔芋胶∶微泡剂=1000∶7∶7。通过现场护壁取心试验表明,改性钻井液的取心率高达90%以上,且护壁效果良好,能很大程度上提高钻孔效率。With the development of drilling engineering towards complex stratum areas,traditional plant gum drilling fluid is difficult to meet the purpose of wall protection and coring.The filtration,rheological properties,and anti-collapse properties of Konjac gum drilling fluid and microbubble agent modified Konjac gum drilling fluid were studied,and combined with the field coring of a dolomite mine,the effect of wall coring of polymer-modified drilling fluid was verified.Research has found that increasing the concentration of konjac gum and microbubble agent can improve the filtration resistance and rheological properties of drilling fluid.The optimal ratio of a new type of polymer-modified drilling fluid was water:konjac gum:micro foaming agent=1000∶7∶7.The on-site wall protection and the coring test showed that the coring rate of modified drilling fluid was more than 90%,and the wall protection effect is good,which can significantly improve drilling efficiency.

关 键 词：钻探工程 植物胶钻井液 魔芋胶 微泡剂 最佳配比 

分 类 号：P634.6[天文地球—地质矿产勘探]