The Research Of Reservoir Characteristic Of Fuyu Formation In Block Dong 5-9,fuyu Oilfield

Fuyu oilfield water flooding development passed through several dozens years, has entered the high water cut development stage, but there are still remaining oil enrichment in the channel sand body, the key way of Fuyu oil production is to enhance oil recovery potential tapping the residual oil.This study is the use of existing oil fields production data and the dynamic and static data, on the basis of sedimentary petrology, reservoir geology, petroleum geology theory, the fine service for the purpose of oilfield development in Fuyu oilfield, by contrast, fault block formation and micro structure, sedimentary microfacies, reservoir distribution and heterogeneity of the reservoir, research description to improve the currentproduction situation,solve the layer better, layer between injection and production characteristics of contradiction, tapping the potential of remaining oil distribution, to achieve the purpose of improving dynamic reserves and recovery factor.According to the Fuyu reservoir characteristics of the cycle of dividing the reservoir into four sand groups 13 layer(1-13), two kinds of sedimentary of Fuyu oilfield in East 5-9 block of Fuyu oil reservoir facies is delta front facies and delta plain sedimentary; underwater distributary channel, natural levee, mouth bar, distal bar and distributary the Gulf between the 9 kinds of sedimentary micro facies. To identify a total of more than 20 positive micro structure, micro structure are mostly micro highs and micro faulted nose structure, distributed in the structural high part and both sides of the graben in the northeast, is advantageous for the remaining oil enrichment zone of remaining oil enrichment area of these wells, is a favorable area for adjustment and tapping the potential of the belt.Fuyu reservoir of upper 1, 2.1, 2.2, 5.1, 5.2 single layer is developed and the distribution of good continuity; Fuyu formation lower 6.2 and 7.1 interlayer is relatively thin, the main development of interlayer; 6.2, 7.1, 9.2, 12.1, 12.2 single interlayer is not developed, and Fuyu reservoir belongs to delta front sedimentary microfacies. The porosity and permeability distribution presents the characteristics of South- North East. And the porosity, permeability, the main channel of high value, porosity and permeability of the river levee flank and low, in Fuyu oil layer, porosity, permeability of single sand body is relatively high in 3, 4, 5, 6, 7, 9 layers of two single sand body, its porosity was above 0.26 also, the permeability in the above 150 millidarcy. For the calculation of reserves geological reserves of 5280700 tons, recoverable reserves of 1617000 tons.