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A Calculation Method of Horizontal Well Carbonate Reservoir Parameters

A carbonate rock reservoir and calculation method technology, applied in the field of logging evaluation of carbonate rock reservoirs in horizontal wells, can solve the problem of complex lithology, porosity, permeability, saturation and other geological parameters with low precision , complex pore structure and other problems, to achieve the effect of strong operability and objective quantitative evaluation

Active Publication Date: 2021-01-05
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0005] Carbonate reservoirs have complex lithology, strong heterogeneity, and complex pore structure. The mineral components of this type of reservoir are diverse, and the rock skeleton is difficult to determine. In addition, fewer logging items for horizontal wells lead to the calculation of reservoir parameters. It is difficult to establish the model, and the accuracy of geological parameters such as porosity, permeability and saturation calculated by logging data is not high

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  • A Calculation Method of Horizontal Well Carbonate Reservoir Parameters
  • A Calculation Method of Horizontal Well Carbonate Reservoir Parameters

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[0027] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0028] The invention is based on the organic combination of element logging and logging data. Firstly, the quantitative calculation of minerals can be realized according to the element mud logging, that is, the mineral composition can be calculated by using the element content of the element mud logging, and its content can be calculated; Variable skeleton of sonic time difference in well section. Then, the acoustic porosity of the whole w...

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Abstract

The invention relates to a calculating method for carbonate reservoir parameters of a horizontal well. The calculating method comprises the steps that the mineral composition and content is calculatedby utilizing the element content of well logging through elements; a sonic differential time skeleton ACma is calculated by utilizing the calculated mineral composition and content; the sonic porosity is calculated by utilizing the calculated sonic differential time skeleton ACma; a neutron porosity curve is reconstructed by utilizing the calculated sonic porosity; the reservoir porosity is calculated by utilizing the reconstructed neutron porosity curve and an existing sonic differential time curve; and the reservoir permeability and gas saturation are calculated. According to the calculating method for the carbonate reservoir parameters of the horizontal well, the problem that logging quantitative evaluation cannot be conducted on a reservoir due to incomplete logging data of a complexcarbonate horizontal well is solved; and the calculating method is high in operability and can accurately and objectively conduct quantitative evaluation on the reservoir of the marine carbonate horizontal well.

Description

technical field [0001] The invention belongs to the field of oil and gas exploration and development, in particular to a well logging evaluation method for horizontal well carbonate reservoirs. Background technique [0002] Carbonate reservoirs in my country generally have the characteristics of deep burial, diverse lithological combinations, complex pore structure, and strong heterogeneity. Especially for horizontal wells, the logging items are incomplete, and many horizontal wells only measure a few curves such as natural gamma ray, resistivity and acoustic time difference curves. As we all know, carbonate reservoirs are mostly composed of two or more lithologies, and at least two porosity logging curves are required in logging interpretation (the three-porosity logging in the logging series is mainly the sonic time difference , compensated density and compensated neutron), when the porosity logging curve has only one curve of acoustic time difference, it is easy to cause...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 冯琼李浩王丹丹魏修平
Owner CHINA PETROLEUM & CHEM CORP
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