A Study On Reservoir Geological Modeling With Seismic And Well-log Data In Fang 2 Area Of Daqing Songfangtun Oil Field

This dissertation has two purposes. The first is to build reservoir geological models for Fang 2 area of Daqing Songfangtun oil field, based on the application of seismic data that is areally dense, and well-log data that provides good vertical resolution. The second is to study the technique details of reservoir geological modeling integrated seismic and well-log data, based on the study of reservoir geological modeling in Fang 2 area of Daqing Songfangtun oi! field, So that the methods of reservoir geological modeling can be tested and some experience can be accumulated for Daqing oil field.The reservoir geological modeling techniques integrated seismic and well-log data are the techniques and methods based on geostatistics and integrated seismic data to build reservoir geological model.The purpose of advanced seismic inversion is similar with reservoir geological modeling integrated seismic and well-log data. It also aims at building 3D model of reservoir lithology and physics character. But they have a lot of different points. Firstly, well-log data is main data in reservoir geological modeling integrated seismic and well-log data, seismic data only makes restriction function, and seismic data is main in seismic inversion, well-log data only makes restriction function. Secondly, reservoir geological modeling integrated seismic and well-log data not only includes deterministic modeling methods, but also includes stochastic modeling methods, and seismic inversion belongs to deterministic modeling domain. They also have some difference ir, modeling arithmetic and precision. Based on the introduce about research actuality and development direction of the reservoir geological modeling techniques, some problems are discussed for understanding the reservoir geological modeling techniques integrated seismic and well-log data, for example, the significance of reservoir geological modeling integrated seismic data, the relation of reservoir geological modeling integrated seismic data and generalized reservoir geological modeling, the feasibility of incorporating seismic data in reservoir models, the restriction function of seismic data, and the application domain of the reservoir geological modeling techniques integrated seismic and well-log data.The method system of reservoir geological modeling integrated seismic and well-log data is built. It includes the matching methods of well-log and seismic data, the methods of seismic attribute extraction and effectiveness analysis, the methods of reservoir structure modeling, and the methods of reservoir property modeling. A new matching method of well-log and seismic data is presented so that two-dimensional distributed seismic attribute can be used in 3D reservoir geological modeling. It is named vertical equivalence method. The seismic attribute classification method based on the geological properties in reservoir geological modeling, seismic wave skewness and kurtosis conception, and the rules of seismic time window selection and attribute analysis are presented. A seismic attribute table is built for reservoir geological modeling in Daqing oil field. The seismic attribute vertical equivalence method used in well-log and seismic data matching is effective for thin reservoir geological modeling. It benefits to build 3D reservoir geological model with 2D seismic data. Some methods that can integrate seismic data to build reservoir geological model are introduced, for example, co-Kriging, collocated co-Kriging, Kriging with an external drift and bayes Kriging of deterministic modeling methods, sequential indicator collocated co-simulation, sequentialGaussian co-simulation, sequential Gaussian collocated co-simulation and sequential Gaussian simulation with block Kriging of stochastic modeling methods, and stochastic inversion method. Based on the reservoir geological modeling fact request of the research area, the reservoir geological modeling methods are analyzed and selected for Fang 2 area of Daqing Songfangtun oil field.Fang 2 area of Daqing Songfangtun...