摘要
在模拟无盐状态下和中原油田高矿化度的条件下,采用扫描电镜研究了用于泡沫驱的驱油泡沫的形貌。无盐泡沫的微观形貌:泡沫以气泡为中心形成了相互交错的六边形环状结构,呈空间重叠状态,在环状边缘上布满了丰富的细网。含盐泡沫的微观形貌:六边型结构特征削弱,但立体结构显著增强。含盐泡沫无独立的盐结构,盐与PS-3和C14-16AOS形成了一种复合结构,盐具有泡沫液膜增强作用。并从两个方面系统分析了盐的存在提高泡沫稳定性的作用机理。在高矿化度的条件下采用电子显微镜研究半衰期前后泡沫的结构。含盐泡沫半衰期前泡沫细腻,比较均一,尺寸差较小。半衰期后泡沫尺度相差较大,不均一性增加。并运用Laplace方程对泡沫的稳定性进行了分析。
Imitating layer conditions without salt state and with the high salinity in Zhongyuan Oilfield, foam used in foam displacement has been studied by scanning electrical mirror. Foam morphology without salt: the center of foam is bubble and foam takes on the intricacies hexagon annular structure, submits space overlapping state, and has been covered with rich slender net on annular edge. Foam morphology with high salt: Its hexagon annular structural features are weakened, but three-dimensional structure strengthens apparently. Containing salt foam has not independent salt structure, and salt has formed a kind of composite structure with PS-3 and C14-16 AOS, so salt has a role of strengthen liquid film of foam. The action mechanism of salt that raises foam stability was analyzed systematically from two aspects. Under the high salinity condition, ringed structures of the foam are researched respectively before and after half-life by electron microscope. Before half-life of foam with salt, the morphology of foam is fine, comparative equality, and size difference is very small. After half-life, size of foam differs greater, and heterogeneity increases. And foam stability is analyzed by Laplace equation.
出处
《钻采工艺》
CAS
北大核心
2007年第5期119-120,130,共3页
Drilling & Production Technology
基金
四川省教育厅青年基金项目资助
项目编号:2003B029
关键词
抗盐
泡沫驱
泡沫
形貌
foam displacement, foam, morphology
