A Study On The Meandering Fluvial Type Reservoir Single Sand Body Internal Architecture Based On Intensive Coring Wells

Based on delta distributary plain subfacies deposition reservoir geological characteristics of Putaohua?reservoir in the xingliu area eastern in the Daqing oilfield,making full use of the abundant six drilling wells cores and wells with offline high densitylog data,on the theories such as high resolution sequence stratigraphy,sedimentology,reservoir geology,reservoir engineering theory and "cycle comparison,classification control" stratigraphic correlation technologies,a Putaohua?reservoir fine stratigraphic correlation framework is established,at the same time,the separability of the Putaohua?3₃² is fully demonstrated from two aspects of core interface and logging curve characteristics,and it is divided into Putaohua?3₃^2a,Putaohua?3₃²b layers,the planar sedimentary microfacies distribution of three small layers including Putaohua?3₂,Putaohua?3₃²a and Putaohua?3₃²b is focused on.Refer to previous reservoir configuration and theoretical research model,this paper puts forward a set of innovative methods used in the study of reservoir architecture mode.The method takes the channel energy differences divide facies of a single energy thought as the leading factor to solve some problems resulting by features of plane composite river and composite point dam cut pile of sand body;secondly,according to more and more strong the lateral erosion and vertical erosion ability of channel in the process of the evolution,the thickness of the side body gradually increase,the channel sand body thickness increase within the energy of single channel microfacies,these modern fluvial sedimentary characteristics can determine some dam type and sand body distribution and side direction of the plane micro phase continuous and discontinuous abandoned channel in the study area;lastly,based on core data and development data,reservoir level configuration internal side interface logic,rationality and accuracy can be determined,we can also extract the side body size and mezzanine related parameters such as density,orientation and angle,establishing single sand body internal configuration mode in line with the xingliu area eastern meandering river reservoir.