The Study To Improve The Development Effect During High Water-Cut Period Of Dongxin Fault-block Oil Reservoirs

Dongxin oil field has developed since 1968, now the oil field has been dring the period of high water-cut. Because of the long-term development, the satus of the reservoir has changed. The problems in development have become more and more serious. For further research on the development rules of fault-block reservoir during the period of high water-cut and to enhance the development level, it is very necessary to study how to improve the development effect of the fault-block reservoirs during high water-cut period .According to the characteristics of complex structures, faults, fluid properties, variuos natural energy, different development level and different development effect, the paper mainly analyses the following four aspects: the water flooding conditions, the law of water-cut rising, the condition of pressure maintenance and the law of production decline. Base on the study, we could obtain the different developmnent laws, identify the reason of development trend variation, and clear the mainly existing problems. We use the reservoir engineering method to analysis the potentiality of oil field, provide the research ideas for the next development working in the areas of impoving development effect, pressure maintenance and reasonable production structure etc. and bring forward the specific adjustment measures.The study about improving the development effect in Dongxin fault -block oil reservoirs will be very important for next research and promotion, and it will certainly provide the theoretical support to enhance the development level in Dongxin fault-block reservoirs and provide the reference for other similar reservoirs.