Characteristics of shut-in curves of transverse cracks in hydraulic fracturing stress measurements

Takatoshi Ito, Kazuo Hayashi

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)

Abstract

Characteristics of pressure decay curves after shut-in, i.e., shut-in curves, in hydraulic fracturing stress measurements were studied theoretically and experimentally for the case that a transverse crack is induced perpendicularly to a wellbore axis. Based on the characteristics, a method to evaluate the shut-in pressure, i.e., the tectonic stress normal to the crack plane, was developed. The method utilizes the plot of the inverse of pressure decrease rate vs the pressure after shut-in. The plot can be divided into two segments, where the plot fits to a straight line in each segment. Then, the shut-in pressure can be evaluated as the pressure at the intersection of the two straight lines. The method is successfully applied to the pressure decay curves after shut-in obtained in laboratory experiments.

Original languageEnglish
Pages (from-to)651-656
Number of pages6
JournalTransactions - Geothermal Resources Council
Volume16
Publication statusPublished - 1992 Dec 1
Event1992 Annual Meeting of the Geothermal Resources Council - San Diego, CA, USA
Duration: 1992 Oct 41992 Oct 7

ASJC Scopus subject areas

  • Geology
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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