A Research Of The Drilling String And The Borehole Trajectory Based On Opengl3D Graphics

With the progressing of oil and gas exploration and development technology, reservoir engineering and oil production engineering require drilling engineering should design and drill complex three-dimensional borehole profile which can control the hole drift angle and azimuth angle according to the actual situation of underground. To achieve such a request, drilling engineers must be fully understanded the drilling geological environment before and during the drilling process, which includes:The changes of the structural feature and the horizon plane of the drilling strata; the physical properties of the rock; the data of the reservoir’s location, thickness and extension direction. And the data involves the borehole trajectory is the most intuitive and the most important engineering material in the filed of petroleum exploration. So the software system for wellbore trajectory visualization and related equipment development received great attention both at home and abroad. These studies have also made the corresponding results. But there is a big gap between home and abroad on this technology now. With the increasing of three-dimensional well type,the Domestic old-fashioned2d-technology can not meet the needs of the field. The same kind of software abroad displays data in three-dimensional space. This can let the engineer observe and analysis the borehole trajectory parameter more intuitively.Three-dimensional visualization technology is an important tool to describe and it can help engineer to understand the engineering factors from underground to ground. It’s also a necessary means to describe and understand the model. And it’s the expression of the data. Using the latest3d visualization technology and the technical theory of3d geological modeling and well logging interpretation can build up a3d digital geological drilling space which is according to the measured data to correct and objective image. Based on the3d trajectory design, control, forecasting theory, and the measured data to predict, monitor and dynamic correct the trajectory in this space. Adding the necessary3d realistic graphics,3d conversion technology and human-computer interaction function chart data in it. This makes the decision makers and on-site technical personnel to understand the drilling hole trajectory, stratum lithology and its annulus fluid physical properties in time. According these to design and control borehole trajectory, adjust and modify the wellbore trajectory in time.The thesis is based on actual survey data of domestic drilling site. It also references the advantages of similar foreign leading software. The thesis studied the technique of using OpenGL,3ds Max modeling and WPF framework to develop3d hole trajectory system framework. The thesis’s main content is divided into the following several aspects:(1) According to the application status of3d technology in drilling engineering domestic and overseas to put forward the aim of the thesis,the main content of research and the research method of route. Discussed the Microsoft Visual Studio development environment which involved in the3d visualization,OpenGL graphics library,three-dimensional modeling software3ds Max and WPF user interface framework. The thesis also discussed the technical characteristic and the information interaction mode.(2) The thesis used the three-dimensional animation modeling method to establish the three-dimensional entity model which base on drilling graphics. It explained how to use the3ds Max software to make a API drill pipe.(3) Based on the knowledge in the field of petroleum engineering and geological and the basic working condition to sum up the borehole trajectory design method and principle after studying the types of oil and gas wells and reservoir applicability. It provided a set of feasible borehole trajectory modeling method. A more in-depth research on some problems which the borehole trajectory design in the existing borehole trajectory design level. Focused on two particular problems those are three-dimensional hole trajectory and the borehole trajectory in three-dimensional display problem in the stratum. The thesis discussed the dependence between the well track and strata. Using C#and OpenGL to realize the borehole trajectory visualization. Including strata visualization,wellbore trajectory visualization and other additional features.(4) Analyzed the theory of wellbore trajectory design,the parameters of borehole trajectory and the calculation of wellbore trajectory. The thesis discussed the three-dimensional hole trajectory system’s feasibility studies and planning, demand analysis, general design, detailed design, coding, data management, project design, system integration platform and interface design.(5) Using the MM block Ml well hole survey data and geological data to test the whole system and according to the test result to analysis system features, and putting forward subsequent versions of the improved scheme.The main problem need to be solved and the used method of this thesis mainly include the following aspects:The combination display problems of strata and the oil well tubing string. Make the oil well tubing string which drawing by OpenGL and3ds Max model into a unified data format, and reading data with Visual Studio development environment for display. Because it can make them together organically. To strengthen the analysis of spatial data and attribute data. This thesis focused on strengthening the analysis of the strata spatial data and attribute data. To organize the data as the object unit, in order to implement the internal analysis of spatial data. To solve the above problems, this thesis mainly adopts the double thread development method, the first step is to use software to establish three-dimensional model, and then converts the model into identifiable data formats, finally uses OpenGL to recombine data.Innovation of the research:This paper proposed a new scheme. This scheme used computer simulation technology to achieve the drilling simulation. The scheme designed according to the drilling site. It adopted high simulation graphics driver to simulate the drilling process. It generated high quality dynamic graphics. Realized the real-time controlled animation. It can generate graphics quickly and steadily. Providing a multi-angle and multi-view work window to users. These measures are used to facilitate the user positioning observation. It can enhance the accuracy of the decision-making and reduce the risk of the downhole complicated conditions of processing in a timely manner. This thesis is a preliminary implementation of visualization technology. Using structured programming in the design process. It can increase the corresponding function according to actual condition in the next step.