BFS固井液在吉林油田油层套管固井中的应用

APPLICATION OF BFS SLURRY IN PRODUCTION CASING CEMENTING IN JILIN OILFIELD

水淬高炉矿渣(BFS)是炼铁厂的副产品,具有水硬性质,目前已广泛用于建筑水泥———矿渣水泥的生产。在我国,BFS大量应用于石油固井业始于20世纪90年代中期。由于用BFS配制的固井液具有密度低、密度范围可调、强度高、滤失量小、无游离水、触变性好、稠化时间可调、无体积收缩等特点,可广泛用于常规和复杂油气井固井。文章概述了BFS固井液及其性质、BFS的筛选、BFS固井液的性能、BFS固井液的配制及现场施工方法,并以吉林油田油层套管BFS固井为例,对BFS固井液的固井质量进行了阐述。实践表明,吉林油田油层套管采用BFS固井,CBL测井表明固井质量优质。

Water-cooled blast furnace slag (BFS), a by-product of iron plants, characterizes hydraulicity, and has largely been put into production of BFS-cements for the purpose of construction. In China, it began to be widely used for well cementing in the petroleum sector in the mid-1990s. Because the cementing slurry formulated by BFS has properties of adjustable low density, high strength, low fluid loss, zero free water, good thixotropy, adjustable thickening time and no contraction after set, it may be extensively utilized in the job of cementing in conventional and complex oil & gas wells. This paper presents a summary of the BFS and its properties, selection of the BFS, properties of the BFS slurry, formulation of the BFS slurry as well as the method of field application. Furthermore, this paper takes a case of production casing cementing with BFS in Jilin oilfield as an example to expound the quality of cementing with BFS slurry. The CBL demonstrates the application of BFS slurry in production casing cementing in Jilin oilfield made an excellent job of cementing.