石油钻采工艺2018，Vol.40Issue(1)：107-110,117,5.DOI:10.13639/j.odpt.2018.01.017
裂缝型储层酸液滤失可视化研究与应用
Research on the visualization of acidizing fluid filtration in fractured reservoirs and its application
摘要
Abstract
To investigate the filtration mechanism of acidizing fluid in the fractured reservoirs in Tahe and increase the fluid effi-ciency in the process of acid fracturing, four key factors of acidizing fluid filtration (i.e., acidizing fluid type, alternative injection stage, prepad fluid proportion and acid injection displacement) were evaluated based on fracture network model by using the independently developed visual filtration simulation and evaluation unit of acid etched fracture. It is indicated that the effect is apparent at the inlet end of gelling acid, the fracture width at the inlet end is much larger than that at the distal end, the width of fractures etched by surface crosslinked acid is uniform and the erosion effect in deep part is good. Besides, the acidizing fluid filtration decreases with the increase of alternative injection stages, and the optimal stage number of multistage alternative injection acid fracturing in Tahe is 3-5. The etched width and depth of distal fractures increase with the increase of prepad fluid proportion. In Well YJX, 3-stage alternative injection acid fracturing technology is adopted and the acid injection displacement is increased to 7 m3/min. Its acid fracturing fluid efficiency and acid etched fracture length are much greater than its neighboring well, acidizing fluid filtration is decreased significantly and the stimulation effect is remarkable with postfrac cumulative oil production of 1.5×104t.关键词
碳酸盐岩/裂缝型储层/酸液/滤失/可视化/塔河油田Key words
carbonate rock/fractured reservoirs/acidizing fluid/filtration/visualization/Tahe oilfield分类
能源科技引用本文复制引用
王洋..裂缝型储层酸液滤失可视化研究与应用[J].石油钻采工艺,2018,40(1):107-110,117,5.基金项目
国家科技重大专项"西北超深井高效钻完井工艺技术"(编号:2017ZX05005-005-009). （编号:2017ZX05005-005-009）
