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

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.