Geological Comprehensive Study On The Second Member Of Shahejie Formation In The Block 1 Of Binnan Oil Field

The fault system in the northern part of the Binnan oilfield is complex and the reservoir heterogeneity is strong,which leads to the contradiction between the layers after the waterflooding development and the unclear distribution of the remaining oil.In order to solve the problems existing in the block,the data of earthquake,drilling,logging production data and so on were comprehensively used in this paper.With the guidance of "cycle comparison and grading control",the stratigraphic division was finished under the control of marker layer.The low order fault is identified and explained using 3D seismic data combined with the drilling data to complete the structural interpretation.The sedimentary environment is analyzed by the sedimentary facies of the rock type,the composit ion structure,the sedimentary structure,the grain size characteristics and the logging response.In this paper,the distribution characteristics of the sedimentary microfacies in the plane are analyzed according to the steps from point to line to surface.The reservoir parameters such as porosity and permeability of the study area are analyzed by logging secondary interpretation.And the reservoir heterogeneity is characterized.Finally,on the basis of the comprehensive study of geology,according to the principle of combination of deterministic modeling and stochastic modeling,using phased modeling method,the three-dimensional model of reservoir geology in the study area is established,which provides a geological foundation for the study of the re ma ining o il d is tr ib ut io n a nd t he d e ve lo p me nt o f t he ad j ust me nt mea s ur es.After research and analysis,the main achievements and awareness are as follows: Used the standard layer,marking layer division,in accordance with the principles of cycle control,the Sha 2 member in north of the Bin one district was divided into 4 sand groups and 28 layers;Two boundary faults in the north and south of the study area control the whole tectonic pattern and the overall structure of the study area was " middle uplift,east slope,west trench";The internal low-order fault is very developed,and the remaining oil distribution plays a certain role in controlling;The study area mainly developed the sedimentary microfacies of the underwater distributary channel,the estuary dam,the far sand dam,the sandy sand and the tributary bay;Based on the interpretation of reservoir parameters,the distribution of reservoir physical properties is clear,which belongs to high-permeability and high-permeability reservoir.The main stratosphere is mainly muddy septum,and the spatial distribution is stable.The sandwich type is mainly composed of mud-Physical interlayer two types;reservoir layer,layer heterogeneity strong;According to the principle of combination of deterministic modeling and stochastic modeling,the three-dimensional geological model can be used to reflect the underground geological conditions.