The Quantitative Identification Technique Of Sedimentary Microfacies To Qigu Formationin In The Six Region Of Nine Block Of The Karamay Oil Fields

The study of sedimentary microfacies can further determine the sand body shape and distribution characteristics,the width of the facies belt and the vertical and horizontal connectivity of the heterogeneity.In the process of identifying sedimentary microfacies from qualitative to quantitative,the method of identification is limited to quantitative identification of microfacies in single well.On the basis of single well identification,this paper tries to make quantitative discrimination of sedimentary microfacies by using the similarity of cross well logging curves,so as to improve the identification accuracy and quantify the boundary.Taking the heavy oil reservoir of Karamay oilfield as an example,the quantitative identification method of sedimentary micro facies is studied in this paper,by combining with the understanding of the sedimentary environment and the results of small layer fine contrast:Taking the heavy oil reservoir of Qi Gu formation in Karamay oilfield as an example,combined with the previous understanding of sedimentary environment in this area and the result of fine contrast of small layer,the regional geological survey of the study block is summarized and analyzed.On this basis,the sedimentary environment and sedimentary microfacies types are summarized.The method of quantitative identification of sedimentary microfacies has been studied.According to the previous research of quantitative recognition technology,method for discriminant analysis method to determine the quantitative development of single well sedimentary microfacies,and on this basis,the logging curve and plane sedimentary microfacies using similarity for quantitative identification of adjacent wells min distance.Therefore,the study of mapping microfacies of sedimentary microfacies and superimposition of vertical phases is carried out.Finally,the method of deterministic modeling is used to quantify the change of sedimentary microfacies from two to three dimensions.Throughout the process,combined with Visual Basic 6 development,the client adopts the Windows platform.Through the combination of written procedures andautomatic recognition of professional geological mapping software Discovery,can achieve the quantitative identification of sedimentary microfacies,and with the help of the powerful computing ability of computer,compared to the artificial analysis phase,but also improve work efficiency.The following research results can be summarized from the research of this paper:1.Under the guidance of sedimentology theory,using core,logging and other data,combined with previous research results,the stratigraphic characteristics,structural characteristics and distribution characteristics of sand bodies are analyzed;2.Based on the quantitative identification of sedimentary microfacies,the adjacent well relation is introduced,which is very helpful for the quantification of facies boundaries;3.A program for automatic identification of sedimentary microfacies and similarity of adjacent wells has been compiled;4.Summarize the distribution characteristics of sedimentary microfacies in this area.The distributary channel,mouth bar and gully are developed on the plane of the2 sand formation of the six region of nine block of the Karamay oil fields;5.Using the deterministic modeling geological model is established in this area,in order to achieve the quantitative identification of sedimentary microfacies from surface to body change,statistical feature model and get on well distribution are in good agreement,and in accordance with the actual geological significance,it can better prepare for the establishment of property model.