Challenges to stress measurements in deep and/or unconsolidated rock formations for frontier rock engineering

研究成果: Paper査読

抄録

In these days, advanced rock and petroleum engineering tend to target deeper and/or unconsolidated oil and gas formations. Rock stress and its effect on the mechanical behavior of rock masses in such formations have drawn much attention accordingly. Taking account of such situation, we are developing new methods based upon hydraulic fracturing, which allow us to measure in-situ stress at few km deep and in unconsolidated formations respectively. In the method proposed for the deep stress measurements, the test tool is conveyed within a drill string. This way should contribute greatly to avoiding the risk of trouble occurring in boreholes such as the tool getting stuck. On the other hand, for the stress measurements in unconsolidated formations, we examined the behaviors of hydraulically-induced fractures by laboratory experiments using unconsolidated specimens made of sand and kaolin. The results show that the step rate test is effective to detect the shut-in pressure indicating normal stress across a fracture rather than the analysis of the pressure decay curve after shut-in.

本文言語English
ページ19-25
ページ数7
出版ステータスPublished - 2012
イベント7th Asian Rock Mechanics Symposium, ARMS 2012 - Seoul, Korea, Republic of
継続期間: 2012 10 152012 10 19

Other

Other7th Asian Rock Mechanics Symposium, ARMS 2012
国/地域Korea, Republic of
CitySeoul
Period12/10/1512/10/19

ASJC Scopus subject areas

  • 地球物理学
  • 地球化学および岩石学

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