西南石油大学学报（自然科学版）2016，Vol.38Issue(3)：101-106,6.DOI:10.11885/j.issn.1674-5086.2014.06.05.04
天然裂缝性地层钻井液漏失规律研究
Dynamic Behavior of Drilling Fluid Leakage in Naturally Fractured Formations
摘要
Abstract
Lost circulation usually occurs in naturally fractured formation. It is very important to understand the dynamic be-havior of drilling fluid losses in lost circulation prevention and control. A one-dimensional infinite fracture model for describing Herschel-Buckley fluid drilling fluid loss was established,and was used to investigate the effect of differential pressure,frac-ture aperture and drilling fluid rheological property on fluid loss rate and ultimate loss volume. The results show that the loss rate curve can be divided into three segments in double logarithmic coordinate. The first and the third segment are straight line,and the middle segment is an arc. The fluid loss rate increases nonlinearly as fracture aperture and differential pressure increases,and decreases as consistency factor,flow behavior index,and yield stress increase. Fracture aperture and loss rate do not conform to the cubic law relationship. Ultimate loss volume increases linearly as the differential and the square of fracture width increase,and decreases as yield stress and flow behavior index increase,with nothing to do with the consistency factor. These results are useful to distinguish mud loss types and take reasonable lost circulation prevention and control measures.关键词
井漏/裂缝/赫巴模式/漏失机理/漏失速率Key words
lost circulation/fracture/Herschel-Buckley fluid/fluid leakage mechanism/fluid leakage rate分类
能源科技引用本文复制引用
李大奇,刘四海,康毅力,张浩..天然裂缝性地层钻井液漏失规律研究[J].西南石油大学学报（自然科学版）,2016,38(3):101-106,6.基金项目
国家科技重大专项（2016ZX05061）；国家自然科学基金（51104025，51374044，51490650）。 （）
