摘要
Complex fault-block oil reservoirs are very common in China and they play a very important role in the petroleum production.It is very difficult for this kind of reservoir to develop because of its complex oil and water distribution.In order to get a good adjustment method,Shaxi N1-N21 complex fault-block oil reservoirs in Qaidam Basin were studied.A series of thoughtways focusing on the faults were developed for the fault-block oil reservoirs.Reservoir tectonics were characterized through the structural stress analysis and detailed structure mapping,oil-bearing sand bodies distribution were predicted and evaluated based on the facies analysis and fault block analysis.The adjustment methods were discussed to increase the exploitation degree and improve the injection-production relationship,especially for the main layers.A good foundation was provided for the reservoir development and the direction of improving the oil recovery was made clear.