Research Of SWD Data Processing Software Architecture

With the increasing requirement of resource exploitation, new resource-exploring methods keep occurring. Seismic While Drilling (SWD), as a new borehole seismic technique proposed recently, now is developing rapidly abroad. SWD is the combination of seismic exploration technology and Petroleum Drilling Engineering to be applied for Drilling Engineering, whose source signal is from the noise produced by the vibration of rock-breaking drill bit, so it belongs to passive seismology. This new technology can carry out data acquisition, processing and interpretation in real-time and has flexibility in observation, with low cost of production, low risk but high resolution with regard to seismic data. Improvement of the drilling success rate is also one of its obvious advantages and it can help in protecting the hydrocarbon reservoir and reservoir description.In some foreign countries, SWD has been well developed and used in field application gradually. This technique is restricted in China because of their monopoly. After several years of exploration and research, China has obtained great development on its theory and method which is significant for the study of relative techniques and equipments, and its further development and extension, as well as for the design of procession software with independent intellectual property rights.SWD data processing software is so complex that principle of general design, step by step implementation is necessary. The key link is a proper structure of software developing and applying platform. Combining with the characteristics of SWD and on the basis of present achievements, this thesis proposes the SWD data processing integrated platform architecture. The main functions of each layer in the framework, e.g. data storage and service, application service, executive control and user interface, are defined and explained respectively. Key techniques like data management, data access, data processing, data visualization and execution and control of operations have been researched and achieved in the software. Then the original system of SWD data processing based on SWD architecture is designed and its feasibility is verified. The main research contents include:(1) Based on the characteristics of SWD technique and analysis of the demand of data processing system of SWD, a hierarchical architecture based on component technology is put forward, which meets the requirements of Petrotechnical Open Standards Consortium (POSC) to the development of oil industry software, with nice adaptability and expansibility.(2) Because there are several problems in the seismic data management, for example the data have complicated types and great capacity but the management form is single, the SWD data storage and management modes are proposed. The structural data is stored in database and the unstructured in files. Database design, as well as file layout of SWD data, is defined and the relative storage optimization scheme is offered.(3) With respect to the problem that the conventional file I/O has low processing efficiency for large data files, the traditional file access mechanism is improved, adopting the combination of file access and File Mapping, achieving the rapid access to the large data file. Because there are many original data formats, a scalable and extensible design of data format conversion is introduced, realizing the flexible conversion between different formats and increasing the efficiency of accessing the large data file.(4) Analyze the application demands of SWD data processing. Research the SWD data processing method and visualization technology. Actual data are processed and displayed, and the result is good, then the pre-drilling prediction is made. Design a special operation procedure for batch processing, which can guide the non-professional users.(5)SWD data processing architecture based on hierarchical architecture is implemented. This system operation is easy and the data can be quickly processed. Data processing, management and visualization, the three functions are contained. It not only meets the requirement of conventional interior data processing, but also can be used for real-time processing in the field of drilling, so this software is significant for site monitoring the drilling process and timely adjusting construction schemes.The purpose of this thesis is to design a steady, reliable, easily maintainable and extensible architecture of SWD data processing system, and then the feasibility of this design is verified.