Abstract: Subjected to a long-term development, Ma-2 fault block oil reservoir has grown into a high water cut stage. Many problems are arising in Ma-2 fault blockoil reservoir at the stage:These are the low level of water control, the sharp conflict visible in or between layers, and the difficulty in developing remaining oil of low permeable zone. To control the progressive reduction of production and to raise the recovery ratio, we have, comprehensively, analyzed the major problems by means of the numerical simulation, and experimented with all the practical adjustment-schemes and selected the best based on the economic evaluation. The study suggests it is necessary and effective to adjust the current development situation of Ma-2 fault block oil reservoir. Through timely adjustment in injection recovery and oil recovery rate in the middle and late periods of development of Ma-2 fault block oil reservoir, not only could high efficiency of development be fulfilled, but ultimate recovery ratio could also be raised. And finally we can achieve the goal of oil collection stabilizing and water controlling.

Key words: fault block reservoir, numerical simulation, project