Design And Implementation Of 3D Geological Model Reconstruction System For Horizontal Wells

The rapid development of global economy inevitably leads to the increasing demand for underground resources such as oil and natural gas.In order to increase the output of single well in well area of oil field,the research of horizontal well drilling technology and well logging geological guidance technology have attracted the attention of petroleum geology workers.The logging geosteering technology on 3 d geological modeling software,3 d geological modeling software has been abroad have a 3 d geological modeling and powerful 3 d graphics interaction and editing environment,geological statistics analysis function,etc.,but foreign 3 d geological modeling software after decades of development,has been relatively mature,lead to more expensive system software,on the core technology is not open to the public.However,in most domestic systems,a few systems can provide secondary development for C++,Java and.net.Face for decades has been leading the domestic foreign three-dimensional geological modeling software design,and the difficulty of software system,the purpose of this paper is to through the logging data and geological data and seismic interpretation results data formation of 3 d model building,between the horizontal well track and strata of interactive 3 d analysis,development of 3 d geological model reconstruction and evaluation system.For the purpose of reconstructing the three-dimensional geological model,this paper mainly proceeds from the following aspects.(1)Research on the method of horizontal well trajectory fitting: Using the well head data and logging data,the horizontal well curve is obtained by calculation,and the logging data and seismic data are visualized by OpenGL.(2)Modeling and analysis of stratigraphic structure will lay a foundation for the follow-up evaluation of regional geological structure and structure of horizontal wells.The precise modeling and analysis of formation attributes are carried out,and the digitized data are displayed intuitively in three-dimensional view,which lays a foundation for the follow-up study of horizontal well logging evaluation.At the same time,the Qt framework is used to create a friendly human-computer interaction interface.The elements displayed in the system can achieve the relevant effect of user-defined display,which makes the three-dimensional reconstruction system achieve good expert model adjustment function.(3)Reservoir log interpretation model in the study area is established by improving the relevant interpolation algorithm,using the data of the study area and seismic horizon interpretation data,and using the seismic wave data and well logging data in the study area to explore the relevant relationship model,simulate a certain number of virtual well data,improve the amount of well logging data in the study area,and study in the area with stable geological structure.Fine modeling in a small area and three-dimensional geological body attribute model in accordance with the study area are established,which ultimately improves the accuracy of logging data geological three-dimensional modeling model.(4)Design and implementation of real-time anti-collision between slices and trajectory sections,fault planes and wells.By dissecting the fine modeling model of geological body,the dissecting geological body model is obtained by researching model slices and trajectory profiles,real-time viewing of the stratum structure of the region concerned,and making relevant contributions to decision-making.By inputting the relevant fault structure into the region,the fault plane of the model can be displayed,and the geological body model of the region can be reconstructed by more realistic simulation.At the same time,as the study area passes with time,the number of wells is increasing and the density of wells is increasing.In order to reduce the probability of cross-well collision during drilling,the real-time anti-collision effect is achieved by calculating cross-well trajectory data.This paper studies the structure,storage,management of logging data and the model of the relationship between logging data and seismic data,and analyses the method of reconstructing three-dimensional geological model,designs and implements it.It provides scientific method support and theoretical basis for reconstructing geological model,at the same time,carries out relevant analysis of realizing geological body model,plays an important practical significance for the geological exploration of the whole oilfield.