Patent · US Active

Systems and methods for detection of induced micro fractures

US10767473B2 · kind B2 · utility

0Cited by

9References

17Claims

0Family size

Assignee

SAUDI ARABIAN OIL COMPANY · SA

Inventors

Hui-Hai Liu · Shanghai, CN
Jilin Zhang · Houston, US
Gary Eppler · Baytown, US

Key dates

Filing date	May 30, 2019
Grant date	Sep 8, 2020
Priority date	—
Expiry date	May 30, 2039

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B43/26
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Methods and systems for detecting impact of induced micro-fractures in a subsurface formation are disclosed. The method includes determining an unloading effective stress (σul) in a formation sample taken from a wellbore drilled into the subsurface formation, determining a fracture closure stress (σcl) of the formation sample, determining that the unloading effective stress (σul) is greater than or equal to the fracture closure stress (σul), and in response to determining that unloading effective stress (σul) is greater than or equal to the fracture closure stress (σul), operating the well system to inhibit impact of micro-fractures in the wellbore.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.