Research And Realization Of 3D Visualization Technology Of Borehole Trajectory Of Horizontal Wells And Stratigraphic Model

Horizontal wells are a well type commonly used in petroleum drilling at present.It is characterized by a special well with a maximum well inclination angle of 90 ° or more,and maintaining a certain length of horizontal well section in the target layer.In the process of horizontal well logging interpretation and evaluation,the geometric relationship between the well trajectory and the reservoir needs to be determined first,which is conducive to optimizing the completion plan and provides a basis for improving the injection-production effect and implementing improvement measures,and it is the subsequent storage The basis for determination of layer evaluation,productivity analysis and perforation interval.With the gradual depletion of oil and gas resources in easy-to-exploit areas and shallow areas,petroleum workers have to gradually turn their attention to oil layers and deep oil layers with more complicated geological conditions.Since the wellbore trajectory cannot be directly observed with the naked eye,to determine the relationship between the horizontal wellbore trajectory and the reservoir,the formation model is needed to assist.Therefore,it is very important to visualize the horizontal wellbore trajectory and formation model Application significance.As a part of the “13th Five-Year Plan” National Science and Technology Major Project 19 Project 5 Sub-Project 6 “Study on the Construction Method of Horizontal Well 3D Logging Attribute Formation Model”,the borehole trajectory was analyzed with reference to domestic and international horizontal well logging software The current status and development trend of the research on stratigraphic models,and on this basis,further in-depth study of the relevant theories and technologies of borehole trajectory and three-dimensional visualization of stratigraphic models,combined with the actual research goals of major national science and technology special projects,based on CIFLog logging integration The software platform has carried out the research on the three-dimensional visualization technology of horizontal well borehole trajectory and formation model.The specific work is as follows:1.Through preprocessing of data and calculation of horizontal well survey data,this paper completed the construction of a three-dimensional model of horizontal well borehole trajectory,and used fidelity thinning algorithm and three-dimensional visualization technology to display water through multiple display modes.Flat well borehole trajectory can more intuitively and visually observe and display the borehole trajectory curve.2.Based on the horizontal well logging data,adjacent well data and related geological data,this paper selects a variety of interpolation algorithms to construct a formation model through discrete original well point data,and implements the formation based.The model is quickly cut along the borehole trajectory,and the borehole trajectory and related logging attributes are displayed in a clearer and more intuitive section form,which is more helpful for the interpreter to carry out related evaluation work.3.Based on the CIFLog integrated logging software platform,this paper has developed a 3D visualization system of horizontal wellbore trajectories and formation models with independent intellectual property rights.The functions such as cutting are organically integrated into the integrated platform module system,which provides technical support for horizontal well logging interpretation evaluation.The 3D visualization system of horizontal well borehole trajectory and formation model is an important part of CIFLog3.0 horizontal well system.Evaluation,The system test runs and the effect is good.