An ore volume-based zonal injection method for ionic rare earth includes six steps of ore body data acquisition; ore volume calculation by units; calculation of leaching agent consumption per unit ore volume; calculation of unit ore volume-based zoning range difference; merging of the units into injection zones; and injection.

An isotope nuclear magnetic method for analyzing ineffective water absorption of rock pores includes steps of: saturating core pores of a core sample with a wetting phase fluid of water H.sub.2O, and obtaining a core T.sub.2 spectrum after being saturated with the water; re-saturating the core pores with a wetting phase fluid of heavy water D.sub.2O, and obtaining a rock baseline T.sub.2 spectrum; injecting fluorinated oil into the core sample saturated with the heavy water; injecting the water H.sub.2O, simulating a water injection process, and injecting the fluorinated oil, so as to analyze a content of immobile water and obtain a residual T.sub.2 spectrum, wherein a range formed by a difference between the residual T.sub.2 spectrum and the rock baseline T.sub.2 spectrum is an ineffective water absorption portion of the rock pores, and an ineffective water absorption amount is obtained.

The invention simulates flows in a geological reservoir having a heterogeneous pore size. From laboratory measurements on samples taken in the geological reservoir, pore size distribution classes are determined and a triple-porosity model representative of each class is determined. The flow simulator according to the invention implements the triple-porosity model, a thermodynamic equation of state accounting for an equivalent dimension of the pores of the small-size medium, fluid exchanges exclusively between the large-pore and small-pore media and between the small-pore and fracture media, and the capillary pressure as a function of the saturation in a small-pore medium.

A sample vessel assembly to carry out a sorption analysis in a container provided with a cooling liquid. The sample vessel assembly includes a sample vessel configured to be suspended within the container. The sample vessel has a sample holding region at a sample end of the vessel to hold a sample to be analyzed. A wick is disposed on the sample vessel and surrounds the sample holding region. The wick extends from the sample holding region to project toward a bottom of the container and draw the cooling liquid over the sample holding region when the sample vessel is disposed in an analysis position in the container.

The disclosure provides a synthetic polymer that mimics the passive absorption kinetics of the human intestinal tract. More particularly, disclosed is a silicone-based polymer, e.g., poly(dimethyl siloxane), poly(dimethyl silicone) and poly siloxane, that meets the requirements of a robust, semipermeable, and in vivo-relevant membrane for use in an in vitro method for measuring the absorption of a chemical compound, such as a therapeutic, e.g., a small-molecule or a biologic, that can be expected to reflect the absorption properties of the chemical compound in the vertebrate gastrointestinal tract, thereby providing an assessment of absorption of the compound in the vertebrate GI tract.

A method for evaluating thickness and density of adsorbed methane in pores contributed by organic matter, clay and other minerals in a mud shale reservoir, including: crushing a sample and selecting three or more subsamples with different meshes to determine TOC, kerogen, whole rock analysis, low-temperature nitrogen adsorption-desorption and methane isotherm adsorption; calculating contents of organic matter in respective subsamples from TOC and kerogen contents; normalizing contents of organic matter, clay and other minerals; evaluating the volume of pores contributed by organic matter, clay and other minerals per unit mass according to contents thereof and low-temperature nitrogen adsorption-desorption; evaluating content of adsorbed methane in organic matter, clay and other minerals per unit mass according to contents thereof and methane isotherm adsorption; and establishing a model for calculating density and thickness of adsorbed methane.

The disclosure relates to methods for determining imbibition of hydraulic fracturing fluids into hydrocarbon-bearing formations. More specifically, the disclosure relates to laboratory methods for determining certain unconventional flow parameters to measure the imbibition over time of hydraulic fracturing fluids into a low-permeability hydrocarbon-bearing rock formation.

A method and device for obtaining microscopic occurrence characteristics of oil stored in a shale, where the microscopic occurrence characteristics include the adsorbed oil film thicknesses in the shale and the oil distribution in the shale. The method includes four steps. The first step is an experiment step in which a N-Hexane vapor adsorption experiment is performed on a sample made from a shale. The second step is a first obtaining step for calculating and obtaining the adsorbed oil film thicknesses in the shale. The third step is a first calculating step and the fourth step is a second obtaining step. They aim to obtain the oil distribution in the shale.

The invention relates to an in vitro method for determining the adsorbing capacity of an adsorbent having limited solubility, such as a bile acid sequestrant, under conditions simulating the mammalian gastrointestinal tract. The method is particularly useful for studying the release profiles of controlled release formulations comprising adsorbents having limited solubility.

Compatibility in polymer compounds is determined by the kinetics of mixing and chemical affinity. Compounds like reinforcing filler/elastomer blends display some similarity to colloidal solutions in that the filler particles are close to randomly dispersed through processing. Applying a pseudo-thermodynamic approach takes advantage of this analogy between the kinetics of mixing for polymer compounds and true thermally driven dispersion for colloids. The results represent a new approach to understanding and predicting compatibility in polymer compounds based on a pseudo-thermodynamic approach.