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Logging Evaluation Study On Fractured-Reservoirs Of Su Deerte Area

Posted on:2011-12-10Degree:MasterType:Thesis
Country:ChinaCandidate:Y TianFull Text:PDF
GTID:2120360308490622Subject:Earth Exploration and Information Technology
Abstract/Summary:PDF Full Text Request
Fractured reservoir has many peculiarities. In terms of their physical - lithological nature and mud filtrate invasion depth of the pore side, there are significant differences and uneven nature of section plane, with the existence of cracks and cavities of different cracks. So the sound and electricity characteristics of rock, has large changes range and uncertainty. Therefore, the identification and development of fractured reservoir possesses a certain degree of difficulty. In-depth study and quantitative evaluation of fractured reservoirs is necessary.Budate Group of Sudeerte area is fractured oil deposit of the metamorphic rocks buried hill. The reservoir has the characteristics of complex lithology, reservoir complex media types, diffeiculty of effective reservoir parameter identification and determination of reserves parameter. Therefore, identifying reservoirs and determining the dual porosity reservoir parameters with well-logging information, is the key technologies of the reservoir evaluation in the study area Budate Group. In order to solve this bottleneck technology, this paper studied the identification of cracks in buried hill and reserve parameters, which also has the great significance of reserves'submission and effective development of Budate Group in Sudeerte oil.The study area for the development of fractured reservoirs and research of its influencing elements summarizes the three kinds of crack logging response pattern: a low angle, high angle and hole logging reservoir response model. On this basis, constructing a crack comprehensive instruction method based on the three-porosity ratio method, the resistivity invasion correction method and the change rate of curve method. The degree of fracture development in the study area have been classified, and with production capacity of the relevant fluid analysis. Drawing upon previous research results of Daqing Exploration and Development Research Institute, based on calculations using conventional curve fractured reservoir parameters of quantitative methods in the study area, the effective porosity, oil saturation and reservoir permeability interpretation methods have been studied, reaching the area of fractured reservoir parameters quantitative calculation purposes.In the fluid nature of the recognition, since the Sudeerte region's new technology and logging data is relatively small, so the use of conventional logging curves, horizontal sub-blocks, sub-vertical oil group, has established suitable plate for the area of oil-water layer, and gives quantitative standards of discrimination. In the new technology, you can give full play to the advantages of nuclear magnetic resonance identification of fluid, combined with the characteristics of fractured reservoir, establishing the new technology with conventional well-logging and other methods to comprehensive identify oil and water layers of fractured reservoir.The method of the paper has been applied by practical application in Daqing Sudeerte area, proving the applicability of fractured reservoirs. Through the analysis of fractured reservoirs in the study, the paper gives ideas and methods, providing an explanation process, so that interpretation is consistent with the rate of markedly improved, to achieve the expected goal, and providing ideas and methods for the future conduct of other oilfield well logging interpretation of fractured reservoir study.
Keywords/Search Tags:fractured reservoirs, qualitative identification, the identification of fluid nature, logging reservoir evaluation
PDF Full Text Request
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