Studies Of Thin And Low Permeability Reservoirs' Classification And Exploitation In Xingnan Development Area Of Daqing Oilfield

It is not only formed sediment in high energy circumstance,but also formed sediment in low energy circumstance of oddment substance in short supply in the reservoir of Daqing oilfield complicated and perennial deposit process. And the sediment in low energy circumstance mainly is argillaceous siltstoue of oil patch or oil immersion,commonly distributing atop or down below or in the interiorly of the attenuation. And the thickness commonly can not be defined as virtual value,and so can not be fallen under dividing line, so go by the name of thin and poor layer.The XingNan Development Area of the fifth oil-extraction is exploit Saertu and Putaohua layer of the Songliao basin .From the top down in turn is SaII,SaIII,PuI layer group.Although the thin and poor layer has low thickness and little proportion,but has great reserves potential. Moreover it is connected with the thickness generally. After secondary infilling adjustment, the thin and poor layer launched into exploitation, improved pay-gross thickness ratio, increased recoverable reserves,the development effect of Xingnan development area was improved. But on account of the poor reserves conditions,some aspect couldn't meet the needled to its poor employed. For example,the absorbing thickness of secondary infilling adjustment wells were low,and production decline was quick,and water content moved upward quickly.Though a series of measure were adopted,the development effect was not improved evidently yet.Through investigation of adjustment reservoir of a large number of the thin and poor layer from both home and abroad,this paper referred to the classification of factors of its flow characteristics and the impact factors on the base of the detail analysis of the characteristics of low-permeability reservoir heterogeneity.Through analysis of the permeability mechanism and the capacity of reservoir pressure conduction,came to the conclusion of use conditions of thin and low-permeability reservoir in XingNan Development Area. On this basis the development of low-permeability reservoir of the reasonable well spacing, layer optimization, enhanced oil recovery methods have been studied and so on.. It is of great significance to further improve the thin and poor layer effects of reservoir development and third infilling adjustment .Table outside the reservoir through the permeability mechanism, the capacity of reservoir pressure conduction analysis of the development zone Xingnan the use of low-permeability reservoir conditions.On this basis the development of low-permeability reservoir of the reasonable well spacing, layer optimization, enhanced oil recovery methods have been studied and so on.. To further improve the balance-sheet effects of reservoir development and adjustment of the three encryption of great significance.