Logging evaluation system of natural gas hydrate in Muli Area
QIN Zhen1, 2, LIN Zhen-Zhou2, 3, PAN He-Ping2, FANG Si-Nan2, DENG Cheng-Xiang2, QIN Rui-Dong2, JI Yang2, XU Wei2
1.School of Geophysics and Measurement-control Technology,East China University of Technology,Nanchang 330013,China; 2.Institute of Geophysics and Geomatics,China University of Geosciences,Wuhan 430074,China; 3.Institute of Geophysical and Geochemical Exploration,GAGS,Langfang 065000,China
Abstract：The exploration of natural gas hydrate in the permafrost area is developed quickly.Several wells containing gas hydrate reservoirs have been found in Muli area.Nevertheless,there is no software log evaluation system in China,which affects the exploration progress of gas hydrate in Muli area.Therefore,based on the geolog,engineering and data sets,the authors developed the logging evaluation system of natural gas hydrate in Muli area by using VB language.The main technology and methods of the system include(1) the pretreatment technology of logging data,(2) the analysis of logging response and lithologic characteristics,(3) the hierarchical and lithologic identification technology,and (4) the calculation and evaluation of reservoir parameters.Combined with the technology and methods,the structure and function of the system are designed.The layered structure is selected,and it contains 3 layers,i.e.basic data layer,middle support layer and application layer.The main functions of the system and technology are realized,and a set of chain process modular and technology flow charts is established.The field application results show that the system can satisfy the exploration processing precision and efficiency of hydrate logging interpretation requirements.The structure of the system is stable,and the function is completed.It achieves the target of the efficient processing and interpretation of gas hydrate logs in Muli area and fills the gaps in related fields.The system could support the exploration and development of natural gas hydrate in Muli area.
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