Logging Processing And Logging Interpretation Of Horizontal Wells In Qigu Formation Of Fengcheng Oilfield

With the wide application of horizontal well technology in the field of oil and gas exploration and development.Horizontal well logging interpretation has become one of the most important research contents in logging interpretation.Based on the method of conventional well logging interpretation,this paper takes horizontal wells of Qigu formation heavy oil reservoir in Fengcheng oilfield as the object of the research,and corrects the logging curves with 3-d finite element analysis numerical simulation.On the basis of the comprehensive utilization of core data,logging data and geological data,this paper studies on the reservoir characteristics and the four properties' relation of oil reservoir in studied area firstly,and analyses detailedly the characteristics of lithology,physical properties,electrical property,oiliness as well as the integrated relations of them.Secondly,based on the finite element analysis,this paper analyses the influence factors of horizontal well dual lateral logging by simulating different logging environment.The result shows layer thickness and shoulder bed are the main influence factors.According to the real formation of the studied area,the correction charts and formulas can be obtained by numerical simulation analysis in two ways depending on whether horizontal well hole-axe is in the center of target layer or not,which can be used to correct horizontal well logging curves.At the same time,after core location,logging interpretation models of shale content,porosity,permeability and oil saturation,which are suitable for the studied area are established.Finally,in real application,the target layers of vertical wells which are close to horizontal well are chosen to test the effect of the correction.The result shows that the log interpretation after correcting horizontal well is similar to the real situation of the reservoir in the studied area.According to the study above,this paper obtains a set of research methods of horizontal well treatment and interpretation that can be well applied to the studied area,which provides reference to horizontal well logging interpretation in the oilfield.