The Study Of Reservoir Geological Modeling Of Horizontal Well Region In Heavy Oil Reservoir And Its Application In The Calculation Of Reserves

The reservoir of Morichal segment in M horizontal well region of the Orinoco heavy oil belt is Sandy braided river deposition and mainly developed by horizontal wells.Compared with vertical Wells data,the horizontal well-logging data shows the characteristics of strong lateral variation in reactivity reservoir.Based on the thought of combination of well-log and seismic data,the modeling method of multiple-point geostatistics is used to set up sedimentary facies model with the three dimensional seismic wave impedance data volume as constraint.Based on theory of facies-controlled modeling,applying sequential gaussian modeling method to establish reservoir petrophysical model.Based on the thought of combination of well-log and seismic data,the modeling method of multiple-point geostatistics is used to set up sedimentary facies model with the three dimensional seismic wave impedance data volume as constraint.Based on theory of facies-controlled modeling,applying sequential gaussian modeling method to establish reservoir petrophysical model.The corresponding measures have been shown as follows.In the process of geologic modeling,seismic data is used to constraint model of sedimentary facies,and it can ensure that the trend of sedimentary facies distribution is correct on the vertically and the laterally;In the process of petrophysical modeling,the result of variation function analysis in vertical well-logging data should only used to constraint the property distribution trend just to ensure the consistency in property distribution trend,source direction and continuity.The own characteristics of horizontal well-logging data is determined to bring some effects on geological modeling,and then affects the calculation of reserves.Therefore,on the bases of geology modeling and property modeling,this paper calculates the probabilistic reserves of three kinds of modeling method that includes the only horizontal well,vertical Wells and horizontal Wells,and the only vertical Wells,and analyses horizontal well's effects on reserves through the comparison of probability reserve.This paper studies the modeling methods of horizontal well and the influence of horizontal well model for the calculation of reserves,these are also important to the modeling and the calculation of reserves of on the same type horizontal well region.