Study On Description Of Remaining Oil And Method Of Adjust The Relation Of Injection-production In Fractured Reservoirs At Zhao 213 Block

Putaohua oil layer of the 213 th block in Zhaoyuan belongs to fractured low permeable reservoirs.There exist many issues since its development,such as uneven water injection,large proportion of low yield and inefficient oil wells,and the yearly increasing insufficient water injection wells,etc.At present,it has come to the stage of high-water-bearing exploitation,in which the distribution of subsurface fluid is increasingly complex and remaining oil distribution is more fragmented.In this paper,we are going to study the structural characteristic of this field,the recognition of reservoir feature,the reconstruction of some area's structure and the trait of fault distribution by analyzing the data of well logging and seism.On the basis of the study of fracture characteristics that are analyzed via the core photos and experiments of adjacent areas,the dynamic monitoring data and the development of oil wells,we study the research method of fracture prediction that based on the method of three-dimensional ant-body type tracking fractures which contains the features of deflection,fault distance and seismic attribute.Consequently,we can confirm the fracture distributions with the method of three-dimensional ant-body type tracking fractures correspond with developing trends.We can complete the track of-I1+2?PI31+32?PI41+42?PI5+6-4 layers' ants-body type micro-fault-fracture.We can determine the fracture characteristics and distribution scale of the study area.Applying the Petrel software completes the model building of matrix crack constraints by using the full mathematical model of porosity,permeability and water saturation that is determined by core and dynamic data,as well as the phase and ant-body type tracking method,which is based on the comprehensive study of structure,reservoir,and fracture.Exerting the matrix and crack two sets of grid system loads the fluid physical parameters of the rock separately.Carrying out the dynamic matching of double medium numerical simulation makes clear of the distribution features of residual oil by describing it horizontally and vertically.It is confirmed that the residual oil was distributed in the oil well drainage and inter-fractural stroma after the comprehensive study.Finally,we optimize two sets of linear water injection schemes,put forward effective injection adjustment measures,and improve the effect of block development after the evaluation and comparison of the development index and economic value of the encrypted scheme.