Pore structure parameter calculation method based on electrical imaging porosity spectrum
A technology of pore structure parameters and porosity spectrum, which is applied in the field of calculation of pore structure parameters based on electrical imaging porosity spectrum, can solve the problem that the quantitative calculation of reservoir pore structure parameters cannot be realized, and achieve the effect of high accuracy
Inactive Publication Date: 2018-09-21
BC P INC CHINA NAT PETROLEUM CORP +1
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[0003] In order to solve the above-mentioned defects existing in the prior art, the purpose of the present invention is to provide a method for calculating pore structure parameters based on electroimaging porosity spectrum. The present invention can calculate pore structure parameters more accurately and quickly through electroimaging data, It solves the problem that the quantitative calculation of reservoir pore structure parameters cannot be realized due to the lack of nuclear magnetic resonance logging data, and can serve in time or meet the needs of actual production, and realizes the quantitative calculation of oil and gas reservoir pore structure parameters, and the application effect is obvious
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[0037] The invention is described in further detail below in conjunction with the accompanying drawings and embodiments, but is not used as a basis for any limitation of the invention.
[0038] The method for calculating pore structure parameters based on electro-imaging porosity spectrum of the present invention includes the following steps:
[0039] Step 1: Select the oil and gas field where the electrical imaging logging is located, and conduct mercury intrusion experiments according to the standard provisions of GB / T 29171-2012 "Determination of Rock Capillary Pressure Curves" for core samples with representative pore structure characteristics of the formation;
[0040] Step 2: Calculate the porosity spectrum through the electro-imaging data, and construct new spectral parameters including the maximum porosity, the mean porosity, the sorting coefficient, the skewness, the microscopic mean coefficient and the kurtosis;
[0041] Maximum porosity P max : the maximum porosity...
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The present invention discloses a pore structure parameter calculation method based on an electrical imaging porosity spectrum, belonging to the field of reservoir assessment in petroleum and naturalgas exploration and development. The method comprises the steps of: selecting core samples having representativeness for a reservoir porosity structure, and performing a mercury injection experiment;calculating a porosity spectrum through electrical imaging data, and performing calculation of porosity spectrum parameters according to definition of the porosity spectrum parameters; calculating thepore structure parameters through the mercury injection experiment data, scaling corresponding porosity spectrum parameters, and obtaining a corresponding pore structure parameter calculation equation; and utilizing the pore structure parameters to achieve total well section continuous quantitative calculation of the pore structure parameters. The pore structure parameter calculation method performs quantitative calculation of the reservoir pore structure parameters in a condition that some blocks are lack of magnetic resonance imaging data, electrical imaging logging information is rich andthe mercury injection data cannot be employed to perform continuous representation of the pore structure, is high in accuracy, and provides reliable basis for the petroleum and natural gas explorationand development in our country at present.
Description
technical field [0001] The invention relates to the field of reservoir evaluation in oil and natural gas exploration and development, in particular to a method for calculating pore structure parameters based on electro-imaging porosity spectrum. Background technique [0002] With the deepening of my country's oil exploration, logging evaluation of complex reservoirs has become the focus of my country's oil exploration. The evaluation of pore structure is the key and difficult point of complex reservoir evaluation, and the evaluation of pore structure can more accurately evaluate the reservoir quality. At present, the pore structure is generally evaluated by the mercury intrusion curve shape obtained from the mercury intrusion experimental data and the calculated pore structure parameters. However, the mercury intrusion experiment cost is high, and the discrete data cannot be used for continuous quantitative evaluation of the entire well. . In order to realize the continuou...
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Login to View More IPC IPC(8): G01V3/38G01V3/18
CPCG01V3/38G01V3/18
Inventor 崔式涛孙佩刘春雷李娜王谦段朝伟牟明洋
Owner BC P INC CHINA NAT PETROLEUM CORP