钻井液与完井液2025，Vol.42Issue(5)：594-599,6.DOI:10.12358/j.issn.1001-5620.2025.05.004
古龙页岩油超长水平段试验井钻井液技术
Drilling Fluid Technology for Test Well with Ultra-Long Horizontal Section in Shale Oil Block Gulong
摘要
Abstract
With the development of the"Daqing Gulong Continental Shale Oil National Demonstration Zone",wells with ultra-long horizontal sections are drilled to evaluate the correlation between the length of the horizontal section and the oil and gas production rate of a well.The length of the horizontal section is planned to be extended from the present 2000-2500 m to 3000-3500 m.Based on the formation characteristics of the Gulong shale oil block,drilling problems such as borehole wall stability,drag and friction reduction and borehole cleaning etc.that are probably encountered in drilling the ultra-long horizontal section wells were analyzed;the oil-based drilling fluid BH-OBM was optimized for those properties such as density,oil/water ratio and plugging performance,etc.During drilling,a"low viscosity high gel strength"rheology strategy and high drilling parameters were used to ensure hole cleaning and low friction and drag.The drilling operation of the test well GY2-Q9-H47 was successful:the average percent hole enlargement of the Φ215.9 mm was only 3.61%(based on wireline logging data),no borehole wall instability was encountered during drilling,and two new records in the shale gas oil block were set:the deepest well(5526 m)and the longest horizontal section(3123 m).关键词
古龙页岩油/超长水平段/试验井/钻井液Key words
Gulong shale oil/Ultra-long horizontal section/Test well/Drilling fluid分类
能源科技引用本文复制引用
龚纯武,许诺,盛杨,刘旭,齐昌利,李博..古龙页岩油超长水平段试验井钻井液技术[J].钻井液与完井液,2025,42(5):594-599,6.基金项目
中国石油集团渤海钻探工程有限公司科技项目"大庆页岩油钻完井综合配套技术研究"(2021ZD22Y). （2021ZD22Y）
