Petrochina Company Limited

Qiusheng Chang

Wei Wang

Ni Zhang

Zhijun Qin

Dongming Zhi

Lichun Kuang

Zhongchun Sun

Haiming Wang

Yong Song

Xiaojun Wang

Xinjun Mao

Min Ouyang

Zhenlin Wang

Rui Mao

A shale oil analysis method and apparatus for continuously characterizing saturation of adsorbed oil and free oil, comprising: obtain NMR T2 spectrum, NMR porosity, oil saturation and wettability indexes of a core samples, determine a lower limit value for the saturation calculation of the absorbed oil based on the NMR T2 spectrum, the NMR porosity, the oil saturation and wettability indices; determining a lower limit value for the saturation calculation of the free oil according to the bulk relaxation Tspectrum of the crude oil of the well interval or an adjacent well interval and the NMR Tspectrum of the core samples; calculating the saturation of the absorbed oil and the free oil, and analyzing the shale oil in the well interval to be analyzed. The solution realizes the quantitative and continuous characterization of the adsorbed oil and the free oil of the shale oil via well logs.

Shale oil analysis method and apparatus for continuously characterizing saturation of adsorbed oil and free oil

Provided is a method for determining effective porosity of high clay-bearing rock core, comprising: acquiring a saturated sample NMR Tspectrum of a high clay-bearing rock core sample, which is measured when temperature of saturated aqueous solution reaches a preset temperature after rock core sample saturated with water being immersed into the saturated aqueous solution and placed and heated in constant temperature and humidity environment; determining a nuclear magnetic total porosity of rock core sample according to the saturated sample NMR Tspectrum; acquiring permeability and NMR Tspectrum of the rock core sample placed in the constant temperature and humidity environment and dried until different time; generating cross-plot of permeability and nuclear magnetic porosity; determining first porosity and second porosity; and determining an effective porosity of the h rock core based on the first porosity, the second porosity, and the nuclear magnetic total porosity.

Method for determining effective porosity of high clay-bearing rock core, computer device and computer readable storage medium

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Beijing, China

Qiusheng Chang