Method for characterizing shale pore wettability based on high temperature and high pressure alternate imbibition
By employing a high-temperature and high-pressure alternating percolation method and nuclear magnetic resonance technology, the deviation problem in wettability characterization under normal temperature and pressure was solved, enabling accurate evaluation of multi-scale pore wettability and improving shale oil development efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA UNIV OF PETROLEUM (EAST CHINA)
- Filing Date
- 2026-05-15
- Publication Date
- 2026-07-17
AI Technical Summary
Existing methods for characterizing shale pore wettability are conducted at ambient temperature and pressure, which cannot accurately reflect the high-temperature and high-pressure environment of the formation. This results in large discrepancies between the results and the actual situation, and makes it difficult to distinguish the wettability of different pore regions, thus affecting the efficiency of shale oil development.
A high-temperature and high-pressure alternating infiltration method was adopted, and the oil and water phases were alternately infiltrated under in-situ formation conditions using nuclear magnetic resonance technology. Combined with the pore size calibration coefficient, the wettability index was calculated to accurately evaluate the wettability changes of multi-scale pores.
It enables the accurate reflection of shale wettability evolution under high temperature and high pressure conditions, and precise assessment of wettability changes in multi-scale pore regions, providing precise guidance for shale oil development and improving recovery rate.
Smart Images
Figure CN122409429A_ABST