提高采收率纤维暂堵人工裂缝动滤失实验研究  

DYNAMIC FILTRATION EXPERIMENT OF FIBER TEMPORARY PLUGGING ARTIFICIAL FRACTURE

作　　者：周福建[1] 伊向艺[2] 杨贤友[1] 刘雄飞[1] 汪道兵 

机构地区：[1]中国石油勘探开发研究院廊坊分院 [2]油气藏地质及开发工程国家重点实验室.成都理工大学 [3]中国石油大学非常规天然气研究院.北京

出　　处：《钻采工艺》2014年第4期83-86,6,共4页Drilling & Production Technology

基　　金：国家自然科学基金(编号:51304032)资助

摘　　要：可降解纤维是一种新型的暂堵转向剂,成功用于非均质碳酸盐岩油气藏的转向酸压和非常规气藏水平井(或长井段直井)的重复压裂改造中,理解纤维暂堵人工裂缝的物理过程是优化纤维暂堵转向压裂设计的关键参数的基础。利用地层条件动滤失分析仪,对纤维暂堵裂缝的滤失特征和封堵有效性进行了评价,得出纤维滤饼的渗透率为1 349.2 mD;利用实验模拟了不同缝宽下纤维滤饼长度的变化曲线,数值模拟表明黏度和注入排量对表皮因子影响较大。A degradable fiber,which is a new temporary blocking and diverting agent,has been successfully used in the diverting acid fracturing of heterogeneous carbonate reservoirs and the refracturing of the horizontal well or vertical wells in unconventional gas reservoir. Identifying of the physical process that the fiber is blocking the artificial fracture is the basis of optimization fiber temporary blocking diverting fracturing parameters. By means of dynamic filtration analyzer simulating the geo-logical conditions,the dynamic filtration characteristic and sealing effectiveness of the fiber temporary plugging fracture were evaluated,the permeability of fiber filter cake is 1349. 2 Md. The changing curve of fiber filter cake length under different fracture width was simulated by experiments,the numerical simulation results showed that the viscosity and injection rate of DCF had a bigger effect on its skin factor.

关 键 词：纤维 转向压裂 数学模型 滤饼表皮因子 附加压差 

分 类 号：TE357[石油与天然气工程—油气田开发工程]