| The purpose reservoir of Chang8-9in TN area is the complex reservoirs which has low permeability and low porosity. In the production process of building with drilling, have the problem of the coincidence rate of logging interpretation been low and the difficulties of sentenced to oil and water layer. In order to improve the effect of fluid identification purpose in the research area, and carry out the research work. Need carried out by the research of recognition fluid properties.This research based on the geology of the research area, the information of core, logging data, and production dynamic:First of all, carried out the research of strata division and correlation in the study area. Established precise framework of strata contrast in study area, reveals the characteristics of top micro tectonic, analyzes the surface exhibition characteristics of sand thickness; Second, carried out the research of the characteristics of reservoir electrical, reveals the macro distribution characteristics of reservoir electrical, analyze the microscopic formation mechanism of the characteristics of reservoir electrical; And then, carried out the research of modeling interpretation model of reservoir parameters, based on the analysis of the four characters, established the logging interpretation model of shale content, porosity, permeability and oil saturation; Again, respectively established the fast identification of fluid logging interpretation plate in the layer around of study area, and based on matlab7.0platform developed interpretation plate software of fluid properties fast identification; Finally, based on the characteristics of research area reservoir to carry out the research of optimization logging series and qualitative identification method of discriminate reservoir layers, based on Hilbert transformation and wavelet analysis method to establish the new recognize technology of reservoir fluid properties.In this research shows that:the top micro tectonic characteristics of sand in the east of west area has low structure and the structure elevated from the east of west area to the west and the east in the study area, and from the surface exhibition characteristic analysis of sand thickness we know that eastern and western of study area has different source direction; the purpose reservoir in study area was the complex reservoir which has low permeability and low porosity, and in the reservoir of Chang811because the role of poor communication of pore and additional conduction of clay, make the situation of high resistance water reservoir was present; in the reservoir of chang91because the role of high salinity and additional conduction of clay, make the situation of low contrast oil reservoir was present; so by using conventional logging response to distinction fluid properties in horizon of individual area has general precision; rendezvous the chart technology,, and introducing the idea of logging curve reconstruction, to build up fast identification of fluid in the chart, that accuracy and efficiency of distinction between oil and water has been increased, and development software in MATLAB7.0platform which make the fluid property identify more convenient and quick; through comprehensive analysis of logging series using in the work area and the existing logging information, put forward the logging series optimization scheme and some qualitative identification method for fluid properties in the study area, and application the method which based on the wavelet analysis and hilbert transformation has achieved the better research effect in reservoir of study area. |
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