4 results about "Mercury intrusion" patented technology

This invention provides a method, system, device, and storage medium for predicting sandstone permeability. The method includes: acquiring a first or second permeability prediction model; acquiring the geometric mean of the pore radius or the NMR T2 distribution within the range of transverse relaxation time >40ms corresponding to a cumulative mercury saturation of 20% for the target sample, as well as the cumulative mercury saturation distribution of the high-pressure mercury intrusion pore size or the cumulative percentage distribution of the NMR pore size; acquiring the lower limit of the pore size of the movable fluid storage space of the target sample and using it as the boundary point for fractal analysis; combining the aforementioned cumulative mercury saturation distribution of the high-pressure mercury intrusion pore size or the cumulative percentage distribution of the NMR pore size to determine the first or second fractal dimension of the target sample; determining the permeability of the target sample using the first permeability prediction model based on the aforementioned pore radius and first fractal dimension, or determining the permeability of the target sample using the second permeability prediction model based on the aforementioned geometric mean and second fractal dimension.

The present application belongs to the technical field of coal seam CO2 geological storage, and proposes a coal seam CO2 geological storage caprock breakthrough pressure prediction method and system based on mercury injection fractal theory, which comprises obtaining the mercury injection experiment data of the target caprock of CO2 geological storage; based on the mercury injection experiment data, the fractal dimension is calculated, and the mercury injection process is divided into multiple continuous stages according to the change characteristics of the fractal dimension; the critical stage corresponding to the pore structure being penetrated by the non-wetting phase fluid is identified, and the mercury injection pressure corresponding to the end of the critical stage is determined as the breakthrough pressure of the caprock; based on the breakthrough pressure, the evaluation of the sealing capacity of the coal seam CO2 geological storage caprock is realized. The method can not only maintain the high efficiency advantage of the mercury injection method, but also truly reflect the fluid breakthrough process, and realize high-precision breakthrough pressure prediction.

According to an embodiment, there is provided an electrode comprising an active material, the active material containing an oxide represented by the general formula Li x Ni 1‑a‑b‑ c Co a Mn b M c O2 (in the formula, x, a, b, and c are 0.9≤x≤1.25, 0.05≤a≤0.5, 0.03≤b≤0.5, 0≤c≤0.2, and M contains one or more metal elements other than Ni, Co, and Mn). The electrode satisfies the following formula (1). 0.001 In the formula (1), A is a pore volume (mL / g) of pores having a pore diameter of 0.01 μm or more and 0.3 μm or less in a pore size distribution of the electrode based on a mercury intrusion method, and B is a pore volume (mL / g) of pores having a pore diameter of more than 0.3 μm and 1 μm or less in the pore size distribution of the electrode based on the mercury intrusion method.

This zirconia-based porous body contains 40% by mass or more of zirconia and 5%-60% by mass of an oxide of a rare earth element, wherein (1) and (2) are both satisfied in a pore diameter distribution based on a mercury intrusion method. (1) The maximum value of a peak in a range of 10 nm or more and less than 300 nm is 1.0-4.0 ml / g. (2) The pore volume of 300-100000 nm is 0.05-1.00 ml / g.