马家嘴油田低压侧钻油层酸化技术研究与应用

Research and application on acidizing technique of sidetracking reservoirs under low pressure in Majiazui oilfield

马家嘴油田断块小、补充能量困难,侧钻时地层压力仅为1．62MPa。由于地层压力低,侧钻对油层污染严重,导致三口侧钻井试油均不出液。针对侧钻泥浆对低压油层的严重伤害,研究与应用了低压侧钻井酸化解堵工艺技术,使三口侧钻井产量达到或超过新井投产水平。

Majiazui oilfield is a small fault block and has the dif ficulty of energy complement.Due to the low formation pressure,it is only 1.62 MPa when sidetracking,the pol- lution damage towards oil layers is severe,which leads to non-liquid flow of three sidetracked wells.In order to solve this problem,acidizing blocking removing technique is studied and put into application.The result shows the production of the three sidetracked wells has reached or exceeds the initial production.