西南石油大学学报（自然科学版）Issue(2)：178-184,7.DOI:10.11885/j.issn.1674-5086.2012.04.05.01
高渗砂岩油藏水平井储层保护钻井完井液
Drillng and Completion Fluids for High Permeability Sandstone Reservoir Protection in Horizontal Well
摘要
Abstract
The Triassic reservoir with medium porosity and medium-high permeability in the Tarim Basin,exhibits intensively heterogeneous pore structure,and serious potential damage of solid invasion,particle migration,sanding,fluid sensitivity. After completion,horizontal wells can not produce through natural power or gas-lift. The results of granularity analysis and dynamic damage evaluation experiments present that the original drilling and completion fluids can not protect the reservoir with permeability of more than 100 mD,while the percentage of regained permeability is less than 50%. According to the mechanism of shielding temporary plugging technology,the original drilling and completion fluids are optimized,and the granularity analysis and dynamic damage evaluation experiments of optimized fluids are carried out. The structure of filter cakes,both the original and optimized drilling and completion fluids,are observed through the FEI Quanta 450 environment scanning electron microscope,then the porosity,pore size and fractal dimension of the filter cakes are analyzed with fractal geometry theory. All results indicated that the optimized drilling and completion fluids can form tight filter cakes,plug the pore of reservoir effectively,and enhance the percentage of regained permeability of core samples up to 90%. After applying optimized drilling and completion fluids,horizontal wells achieved production through natural power and got high production after completion.关键词
砂岩油藏/钻井液/完井液/储层保护/屏蔽暂堵/滤饼结构Key words
sandstone reservoir/drilling fluids/completion fluids/formation damage control/shielding temporary plugging/filter cake microstructure分类
能源科技引用本文复制引用
康毅力,刘燕英,游利军,牛晓,罗发强..高渗砂岩油藏水平井储层保护钻井完井液[J].西南石油大学学报（自然科学版）,2014,(2):178-184,7.基金项目
“973”计划课题（2010CB226705）；国家科技重大专项（2011ZX05005-006-008HZ）。 （）
