盘40区块砂岩储层酸化用酸优选研究

The research and selection of acidizing in sandstone reservoir of Pan 40

储层酸化是砂岩油藏油井解堵增产、注水井增注的一项重要措施。盘40区块属常规低渗透油藏,长期的注水开发造成油层堵塞。根据现场的实际情况,通过对现场提供地层水进行水质分析,判断地层水水质对油层堵塞的影响。并围绕盘40区块油层堵塞的实际情况,优选四种酸液及其配方对地层进行酸化解堵实验,最终评价出一种解堵效果较好的酸液配方,达到提高地层渗透率,解堵增产的目的。

Acidification is an important measure to remove plugging and raise productivity in sandstone reservoir. Pan 40 region belonged to the conventional low-permeable reservoirs and the long-term injection development of this reservoir have resulted in plugged or damaged. According to the scene situation,we analyzes the quality of stratum water and determine that influence on reservoir plugging. The author also applied acidity experiments of four acid and different element and researched some relative better acid combination for this plugged so that they can reached the purpose of improving the stratum permeability and removing plugging.