Determination of Instantaneous Shut-In Pressures in Hydraulic Fracturing Tectonic Stress Measurements

Kazuo Hayashi, Izumi Sakurai

Research output: Contribution to journalArticlepeer-review

Abstract

A new method is presented for the determination of the instantaneous shut-in pressures in the hydraulic fracturing tectonic stress measurements. The method is developed by the analysis of the closure process of the crack induced by hydraulic fracturing and it utilizes the inverse of the decrease rate of the downhole water pressure after the shut-in. The plot of the inverse of the decrease rate vs the downhole pressure consists of two straight lines and the instantaneous shut-in pressure can be cleary determined as the pressure of the point of intersection of the two straight lines. The new method is applied to the pressure vs time records which were obtained in field experiments. It is revealed by the application to the field date that the new method can clearly determine the instantaneous shut-in pressures from all of the pressure vs time records applied.

Original languageEnglish
Pages (from-to)854-857
Number of pages4
JournalTransactions of the Japan Society of Mechanical Engineers Series A
Volume55
Issue number512
DOIs
Publication statusPublished - 1989

Keywords

  • Crack Closure
  • Elasticity
  • Fracture. Artificial Subsurface Crack
  • Hydraulic Fracturing
  • Instantaneous Shut-in Pressure
  • Tectonic Stress Measurement

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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