In this paper, we present a technique to analyze and correlate the different types of computerlog files. log files are generated from servers and network devices to record operations that occur in the computers and n...
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(纸本)9781424463671
In this paper, we present a technique to analyze and correlate the different types of computerlog files. log files are generated from servers and network devices to record operations that occur in the computers and networks. As log files are too enormous to manualize, we develop a tool to maximize accuracy as well as efficiency while high speed processing is the goal. Firstly, we must improve the accuracy by using learning algorithms to classify the normal operations from the abnormal ones such algorithms include tf-idf, association rules, k-means clustering, and decision tree. Secondly, we may adapt for less accuracy in order to gain speed for both with and/or without parallel processing techniques. We also construct an adaptive learning algorithm to update the model. Then we flush out out-of-date model while the logs are being captured and processed. The result can achieve the goal as they can reach about 30-40％ in real-time processing with nearly zero false positive results.
This paper describes an orderly and systematic approach to the solution of a parameter identification problem in a West Texas carbonate reservoir. A well-planned coring program and subsequent conventional and special ...
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This paper describes an orderly and systematic approach to the solution of a parameter identification problem in a West Texas carbonate reservoir. A well-planned coring program and subsequent conventional and special core analysis provide a sound basis for computer log analysis of the complex lithology of the San Andres ***. The Howard-Glasscock field is located south of Big Spring, Tex., in Howard and Glasscock counties, and has produced oil from the Lower Grayburg and San Andres formations since 1929. Sun Oil Co. began pilot waterflooding on the Hart-Phillips lease in 1964. The West Howard-Glasscock Unit was formed Jan. 1, 1972. During 1973, 40 wells were drilled for waterflood expansion. Ten wells were cored extensively and 38 wells were logged with suites designed for computeranalysis. Fig. 1 shows the distribution of the cored and logged wells. Approximately 80 wells existed before this project and are not *** Program. Because of the complex lithology associated with the producing formations, an extensive coring program was conducted to aid in log interpretation, geological mapping, and injection-well planning. The 10-well coring program is summarized in Table 1. The over-all recovery efficiency was 98.2 percent, with a core loss of only 73 ft occurring during the 4,118-ft coring. Of the unrecovered 73 ft, 52 ft were lost on one well, which increased the core recovery efficiency of nine wells to 99.4 percent. Recovery efficiency contributed immeasureably to the log interpretation program because core-analysis values could be correlated directly with log-derived values without the usual large gaps in core *** Core analysis. The cores were transported to a service company laboratory and analyzed by "whole-core" techniques. The whole-core technique1 analyzes various lengths of full diameter core for fluid saturations, porosity, and two-directional horizontal permeability (kmax and k90°). Whole-core analysis was selected becau
This evaluation was conducted in connection with an experiment in stimulating formations with multiple nuclear explosions. The values for reservoir properties were obtained by core and computerized log analyses for th...
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This evaluation was conducted in connection with an experiment in stimulating formations with multiple nuclear explosions. The values for reservoir properties were obtained by core and computerized log analyses for the nuclear stimulated well and by analysis of pressure buildup tests on another well nearby. Gas production was predicted on the basis of the values obtained. Introduction The existence of major volumes of gas in thick, low-permeability sandstone reservoirs in Colorado, Wyoming, and Utah has tantalized producers for decades. Conventional efforts to obtain commercial production from these resources have been generally production from these resources have been generally unsuccessful, not only because the permeabilities are extremely low (on the order of several microdarcies to several tens of microdarcies) but also because the gas-bearing sandstone beds are generally scattered throughout sand/shale intervals greater than 1,000 ft thick. Typical tight gas reservoirs are found in the Tertiary Fort Union and the Cretaceous Mesaverde formations of the Piceance Basin in northwestern Colorado. These formations have been drilled and conventionally fractured in Rio Blanco County without successfully obtaining commercial production. New gas production operations in this area have been sparked, however, by the potential for successfully stimulating gas production with multiple nuclear explosions. The 94,000-acre Rio Blanco Unit area (Fig. 1) has been established and a nuclear stimulation treatment has been carried out in Well RB-E-01 with three 30-kt explosives. Emplaced at depths of 5,839, 6,230, and 6,690 ft, these explosives should have effectively fractured a 1,300-ft gross section of the Fort Union and Mesaverde formations from 5,530 to 6,830 ft, subsurface. The evaluation of a stimulation treatment’s effectiveness is, of course, dependent upon a knowledge of reservoir characteristics, particularly permeability and net pay thickness. The development of such kno
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