大庆石油地质与开发2024，Vol.43Issue(6)：80-89,10.DOI:10.19597/J.ISSN.1000-3754.202307003
复杂岩性碳酸盐岩裂缝型储层酸化压裂数值模拟
Numerical simulation of acidizing fracturing in fractured carbonate reservoir with mixed lithology
摘要
Abstract
The carbonate reservoir of Majiagou Formation in Daniudi Gas Field of Ordos Basin is characterized by mixed lithology,and acid-rock reaction rate varies much among different minerals.Considering comprehensively ac-id-rock reaction of various minerals,acid fracturing model of mixed lithology reservoir is established to simulate the influence of mineral content,mineral distribution,natural fractures and reservoir temperature on acidizing fractur-ing effect.The results show that acid penetration distance increases by 23 m with the decrease of limestone propor-tion from pure limestone to mixed lithology reservoir.Rock mineral distribution has little effect on acid penetrated fracture length,and acid penetration gets longest distance when acid flows along distribution direction of minerals.Natural fractures development increases acid leakoff.When fracture density difference is 0.2 fractures/m,acid pene-tration distance is reduced by about 20 m.Temperature has the most influence on mixed lithology reservoir.When reaction rate of dolomite is close to that of limestone from 60℃to 120℃,acid penetration distance decreases by 72 m.The research provides new method for acidizing fracturing stimulation of mixed lithology carbonate,and en-riches the theory of carbonate reservoir stimulation.关键词
酸压数值模拟/复杂岩性/碳酸盐岩/矿物含量/矿物分布/天然裂缝/温度/酸液作用距离/马家沟组Key words
numerical simulation of acidizing fracturing/mixed lithology/carbonate rock/mineral content/min-eral distribution/natural fracture/temperature/acid penetration distance/Majiagou Formation分类
能源科技引用本文复制引用
夏熙,牟建业,张士诚,卢盼盼..复杂岩性碳酸盐岩裂缝型储层酸化压裂数值模拟[J].大庆石油地质与开发,2024,43(6):80-89,10.基金项目
中国石化华北油气分公司项目"碳酸盐岩残酸伤害测试及盐下储层改造技术模拟"(34550139-20-FWO421-0017). （34550139-20-FWO421-0017）
