碳酸盐岩储层酸蚀蚓孔形态地质建模  

Geological Modeling of Acid-etched Pupils in Carbonate Reservoirs

作　　者：李英菊 李现振 卢美月 LI Yingju;LI Xianzhen;LU Meiyue(College of Earth Sciences, Yangtze University, Wuhan, Hubei 430100, China;Shixi Oilfield Operation Area, Xinjiang Oilfield, Karamay, Xinjiang 834000, China;College of Petroleum Engineering, Yangtze University, Wuhan, Hubei 430100, China)

机构地区：[1]长江大学地球科学学院,湖北武汉430100 [2]新疆油田石西油田作业区,新疆克拉玛依834000 [3]长江大学石油工程学院,湖北武汉430100

出　　处：《中国锰业》2020年第2期30-32,45,共4页China Manganese Industry

基　　金：国家科技重大专项(2016ZX05060-002)。

摘　　要：针对碳酸盐岩储层基质酸化形成的酸蚀蚓孔特点,基于基质酸化机理和分形理论,借助编制的VB软件,对碳酸盐岩水平井的酸蚀蚓孔形态进行数值模拟,分析天然裂缝和其对应参数以及盐酸质量浓度对水平井酸蚀蚓孔增长形态的影响。结果表明:存在天然裂缝时,蚓孔大多在裂缝尖端处生长,不存在天然裂缝时在井筒附近生长密集;随着盐酸质量浓度增加,蚓孔沿裂缝在尖端处生长的趋势明显;天然裂缝条数和长度的增加使得酸蚀蚓孔形态对井筒周围蚓孔形态有一定的抑制作用。Based on the acidification mechanism and fractal theory of carbonate acid reservoir matrix formation,the VB software was used to simulate the acid etching pupil morphology of carbonate horizontal wells.Its corresponding parameters and the effect of hydrochloric acid mass concentration on the growth pattern of acid wells are in horizontal wells.The results show that most of the pupils grow at the tip of the crack when there are natural cracks.When there is no natural crack,the growth is dense near the wellbore.When the concentration of hydrochloric acid increases,the tendency of the pupil to grow along the crack at the tip is obvious.The number of natural cracksand the increase of the length will produce the shape of the acid-etched pupil a certain inhibitory effect on the shape of the pupil around the wellbore.

关 键 词：碳酸盐岩 基质酸化 酸蚀蚓孔 分形理论 

分 类 号：TE357[石油与天然气工程—油气田开发工程]