3D Geological Modeling And Evaluation Of Development Utilization Level Of Horizontal Well Area In Putaohua Oil Layer In Block 254

Block 254 of Zhaozhou Oilfield is located in the south of Sanzhao Sag on the east side of Daqing Placanticline and west of Chaoyanggou Terrace.Sanzhao Sag is one of the main oil-generating sags in the peripheral control area of Daqing Placanticline.After decades of development,Zhaozhou Oilfield has entered a period of high water cut development.Therefore,the use of horizontal well technology to improve recovery and increase recoverable reserves has become the most effective means.Therefore,for the geological features such as thin oil layer,thin interbed development,poor inter-well continuity and fault development in Zhaozhou Oilfield and the development effect of horizontal wells is good,but the target layer is difficult to control while drilling,the number of thin sand layers encountered and single sand body space Difficult to recognize other issues.In this study,the three-dimensional geological modeling of horizontal wells under the conditions of thin sand bodies with thin interbeds is provided,which provides strong guidance for predicting the distribution of sand bodies on the plane,analyzing the connectivity of oil and water wells,and evaluating the degree of research and development utilization.The establishment of the three-dimensional geological model of the horizontal well area was completed using Petrel modeling software.Based on the analysis of regional geological background,based on the well-seismic fine structural interpretation and the research results of small sedimentary and sedimentary unit level sedimentary microfacies,a complex multi-segment block Three-dimensional structural modeling of faults and plane structures under geological conditions,finely portrayed 156 faults,especially the newly identified 32 and corrected 46 faults,which laid a foundation for the correction of horizontal well drilling encounters A solid foundation;three-dimensional modeling of sedimentary microfacies in 13 time units was carried out by a combination of stochastic modeling and deterministic modeling by changing the traditional deterministic modeling method;and porosity,permeability,oil content 3D geological modeling of saturation phase-controlled attributes;through model,discretization,and analysis of original attribute values of well points,the results of attribute modeling are true and reliable,and the reliability of structural and sedimentary facies models is confirmed by post-inspection.Based on the detailed three-dimensional geological modeling of thin interbedded narrow sand bodies and complex fault blocks,the well control area of each vertical well and horizontal well is determined,the development degree of horizontal wells is calculated,and the loss reserves of horizontal wells are estimated to provide a basis for later development adjustment.