Abstract:

Aimed at Suizhong 36-1 oilfield of Bohai Bay, which was characteristic of multi-layer, thick oil layers, high permeability and porosity, loosely consolidation of the rocks and the dramatically var inene mabiyaswell as acid absorbability, asimple, effective and practicable diverting acid technique together with the diverting agent suitable to the field was put forward, and the performance evaluation and computer simulation were carried out systematically. Research suggests that this diverting agent, which was soluble in the producing liquids and has no side effects on reservoir, can accomplish reasonable acid diverting of this field successfully. This new technology can effectivelye ob asibution in acid treatment of multi-zone reservoir varied in permeability and improve acidizing effect significantly. The application of the agent can also decrease water cut to some extent. The technique has been widely used in Suizhong 36-1 and other oilfield in Bohai Bay, and yielded desired results. The application of this technique in Bohai Bay was used for reference of acidizing similar oilfield.

Key words: acidizing, diverting, high permeability and high porosity, Bohai, Suizhong 36-1 oilfield