The Description And Application Of Fine Geology In Putaohua Reservoir Of East Of Daqing Placanticline

Putaohua reservoir of east of Daqing placanticline has a feature that the oil layer is very few that has developed,formation thickness is thin and sandbodies distribute scatteredly.The permeability is low in reservoir, so that the oilfield development difficulty is very great.In the course of development of the field, it's distincted that declining rate is very high and recovery ratio is low. In order to improve the effect of development, a number of works are developed the fine geologic research in reservoir. Thus,it is distincted about areal structure and reservoir feature.They provide the criterions for overall system adjustment in oilfield. The work has the fully significant actual sense .General structure features are the'three arches and three sags'in Putaohua reservoir of east of Daqing placanticline. It is that there are three nosing structure in Songfangtun, Mofantun and Shengping and that there are three downfold in Xujiaweizi,Shengxi,Yongle. By utilizing fine resolution sequence stratigraphy and sedimentology, it is done sequence coenocorrelation having fine resolution and the research about the deposition system-deposition microfacies in great areal developed well network and the reservoir distribution. By use of the datas about rock core and well logging, the electrofacies pattern and the type of sedimentary facies are established in Putaohua oil layer and that the cognition is deepened about geologic characteristic in that.On the base of the research and analysis about fine geologic description in reservoir of determinative oilfield and development contradiction, the feature is further cognized about dynamic state and static state.Then, the basic classification will be done on oilfields. By inquiring the countermeasure about slowing the rate of decline of production ,the dominant factors that impact decline of production is derived by the theory method on reservoir engineering. Combining the result of oilfield classification, main blocks are optimized and the technique measures are made about overall system adjustment. At the same time, it is studied the distribution of remaining oil and the waterflooding method in oil layers by the multi measures and associating many course. By taking steps such as the adjustment of well pattern thickening, the test of microbian being taken in and sent out in large quantities and the test of CO2 being taken in and sent out in large quantities and so on , it has a specified direction sense and has a better appliance foreground in improving the development effect and enhancing oil recovery.