Evaluation method for hydrogen-bearing components, porosity and pore size distribution of organic-rich shale
US11378509B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2018 |
| Grant date | Jul 5, 2022 |
| Priority date | — |
| Expiry date | May 5, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/448
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An evaluation method for hydrogen-bearing components, porosity and pore size distribution of organic-rich shale is provided, relating to a technical field of oil and gas development. The evaluation method includes steps of: according to differences among NMR (nuclear magnetic resonance) T1-T2 maps of kerogen, oil-adsorbed kerogen, clay minerals of different water-containing conditions, shale, dry shale sample, oil-saturated shale sample and water-saturated shale sample, establishing a classification scheme for each hydrogen-bearing component and a quantitative characterization method for fluid components of the organic-rich shale; with a T2 distribution of the organic-rich shale after being saturated with oil as a target and a T2 distribution of the dry shale sample as a basement, subtracting the basement, and obtaining a T2 distribution of oil in pores; and based on the T2 distribution of oil in the pores, evaluating the porosity and the pore size distribution of the organic-rich shale. Compared with a conventional method, the present invention shows relatively high innovativeness and credibility, which is beneficial to perfecting analysis of NMR in shale petrophysical measurement…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.