Study On The Reservoir Configuration Of Shanxi Formation In Shenmu Area

The main content of this paper is to study the fine oil reservoir description of Shanxi formation in Shenmu area of ordos basin.In accordance with the need of oilfield development present situation and the actual production,in the full understanding Shenmu region of Shanxi formation interval under the premise of the geological background,a lot of use of sedimentary petrology,sequence stratigraphy,logging geology and geological modeling and other basic subject knowledge,such as well logging,core,production exploitation as the basic information,conformation anatomy of the study area is set up using sequential Gaussian modeling method of sedimentary microfacies and reservoir physical property parameter model,for the study area of reservoir simulation and development plan provides the practice.The following research results are mainly obtained:Based on the development status of the oilfields and the actual production needs,the research background of the Shanxi formation in the Shenmu area was comprehensively guided by multidisciplinary theoretical knowledge such as sedimentology,geology,stratigraphy,and stochastic simulation theory,and a large number of logging and logging were performed.On the basis of drilling coring and other data,the study area was dissected and the sedimentary microfacies and physical parameter model of the reservoir was established using the sequential Gaussian modeling method,which laid a solid foundation for the reservoir simulation and development program in the study area.The main achievement of the following research results:1.With the guidance of “correlating according to sedimentary and geological hierarchy control ",163 wells in the study area were compared in small layers.23 skeleton contrast profiles were established,and the unified closure of the whole area was completed.The main target segments of Shanxi formation were divided into 11 parts: Shan 11,Shan 12,Shan 13,Shan 21,Shan 22,mountain 23 and six layers.2.According to core hole coring data,logging curve characteristics,such as reference in the study area the understanding of the overall regional sedimentary background and the depositional model research,can judge of Shanxi formation source mainly comes from the north-north east.The sedimentary fancies of the study area belong to the subfacies of delta plain,which are divided into the microfacies of distributary channel,the microfacies of the heart beach,the microfacies of the shunt and peat bog microfacies.The main reservoir of the sand body is the distributary channel and the heart beach microfacies.Through the analysis of the sedimentary facies profile in the study area,the study of the distribution pattern of planar sand body and the guidance of the sedimentary facies model,the characteristics of the planar spread of the microfacies in the region are determined.3.In reservoir microfacies for further analysis object,using the research methods of "level analysis" and by Miall configuration scheme for dividing the grades of fluvial facies as the foundation,established a research area configuration scheme for dividing the level 5.From coring Wells configuration analysis,build configuration unit vertical division of rock electrical response relationship issue,analyzing the characteristic of the configuration interface at all levels of recognition and,starting from coring Wells configuration analysis,through summarizing the braided channel sand body lateral beginning marks,will even patchy distribution of thick sand body dissection into single or superimposed braided river channel;The contact styles of several kinds of sand bodies in the river channel in the research area are summarized,including the plane contact pattern of side parting and lateral splicing.The vertical contact pattern and the combination of two contact styles.4.Using well logging data and observations of core analysis data,we conducted a study on the heterogeneity of reservoir physical properties within the isochronal framework of the reservoir of the Shan 2 section of the Shanxi section of the Shenmu Formation,and refined it from the inside of the layer,the interlayer,and the plane.The characteristics of its reservoir properties and heterogeneity are portrayed to provide theoretical data for the establishment of a reservoir geological model in the study area.5.The geological model of the typical reservoir development zone of the Shanxi Formation in Shenmu area is based on the comprehensive use of geological and well logging data.The sedimentary microfacies geological model was established using Petrel modeling software using the sequential indication simulation method.Each model is constrained,and sequential Gaussian simulations are used to simulate the establishment of a physical model,and a fine three-dimensional geological model of a typical development zone is established.