The Study on Remaining Oil and Exploiture Countermeasure of He 31 Fault Block in Ultra-high Water Containing Period

The remaining oil distribution and exploiture countermeasure of the he 31 fault block in the stage with ultra-high water containing is studied by the fine description of reservoir. In the guide of new cognition, we establish the exploiture principle, which is well pattern's rebuilding and subdivisioning strata series. So all kind of measures are used including direction-inclined well technology, sidetracking well technology and water dynamics method. As a result, the oil recovery efficiency is improved from 42.2% to 45.9%. The success of the adjustment gives major guide to develop other reservoirs in high water containing period.