振动-土酸酸化复合解堵室内实验研究

低、特低渗透油气田开发中普遍存在因无机结垢、有机结垢、微生物、外来颗粒、黏土矿物等引起的近井地带地层堵塞问题。针对此问题，开展了振动、土酸酸化及振动-土酸酸化复合解堵的效果比单独使用振动或土酸酸化解堵的效果更显著。振动解堵使岩心渗透率提高10%～20%，土酸酸化解堵使岩心渗透率提高10%～40%，而使用振动-土酸酸化复合解堵可使岩心渗透率提高40%～70%。对流体在生产井和注水井中的流动进行了室内实验模拟，开发的新型的振动-土酸酸化复合解堵技术不仅解堵效果好，而且比较稳定，至少可使岩心渗透率提高40%左右。图5表4参8

Vibration-mud acidization treatment broken down experiment

The zones nearby the well could be blocked by inorganic crust, organic crust, microorganism, foreign grain, and clay in the development of low permeability oil and gas fields. So the exploitation cost of the reservoir is always high. The vibration, mud acidization and vibration-mud acidization comprehensive experiments suggest that the comprehensive experiment should have higher efficiency than that of single way. The vibration broken down technique improves the core permeability by 10%-20%, the mud acid by 10%-40%, and about 40%-70% will be gotten by using the comprehensive technique. The fluid flow in the production and injection well is stimulated by the experiment. The results suggest that the effect of vibration-mud acidization treatment is better and more stable than that of other treatments.