New PDF release: Well Test Analysis for Fractured Reservoir Evaluation


By Giovanni Da Prat

ISBN-10: 0444886915

ISBN-13: 9780444886910

The most objective of this ebook is to supply the reader with a uncomplicated realizing of the behaviour of fractured reservoirs, utilizing review options in keeping with processing strain and flow-rate facts because of creation trying out. It covers the elemental reservoir engineering rules concerned with the research of fluid move via fractured reservoirs, the applying of current versions to box instances, and the assessment and outline of reservoirs, in accordance with processed info from strain and construction assessments. the writer additionally discusses creation decline research, the certainty of that's a key issue influencing final touch or abandonment of a good or perhaps a box. The theoretical ideas are provided as essentially and easily as attainable with the intention to relief comprehension. The ebook is hence compatible for education and academic reasons, and should aid the reader who's surprising with the topic gather the mandatory talents for profitable interpretation and research of box info. essentially the most very important gains of the booklet is that it fills the space among box operations and learn, in regard to right administration of reservoirs

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Example text

The Laplace transform deconvolution can be considered one of many methods of obtaining the formation-pressure drop. As presented by Kucuk and Ayesteran (1983), other methods are used in practice, based on the linearization of the convolution and curve-fit approximations. The reader interested in the advantages and disadvantages of each method is referred to this work. 3. Examples of application An example of the application of both convolution and deconvolution methods was given by Ahmed et al.

Graph, Meunier et al. (1983) came up with the equation: (1-50) while the plot of Simultaneously rneawred pressure and sandface ffow rates 27 should give a straight line with slope rn and intercept equal to rnS. Meunier et al. H. graphs with those modified according to eqs. (1-48) and (1-50) is given. Figures 1-14 and 1-15 show the differences. The main conclusion is that the semi-log straight line starts more than one cycle ahead when performing convolution analysis as compared with conventional graphs.

In general, it is a question of a heterogeneous porous medium in which the openings (fissures and fractures) vary in size. Fractures and openings of large size form vugs and interconnected channels, whereas the fine cracks form block systems 36 Naturally fractured reservoirs Fig. 2-1. , 1977). The vertical fractures are cleaving the chalk into thin vertical sheets. Courtesy of SPWLA. Reservoir description 37 Fig. 2-2. Photographs of completion cores in La Paz wells (Cretaceous limestone). It is believed that the oil reservoim are located only in the natural fissures of the formation.

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Well Test Analysis for Fractured Reservoir Evaluation by Giovanni Da Prat

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