### Abstract

The stress-strain behavior of Berea, Ohio, and Pecos sandstone was measured intensively under triaxial loading paths. Both compression and extension tests were performed at different pore fluid pressures. The characteristics of these modes were studied, and a nonlinear model was developed to represent the important characteristics, i. e. , the four modes, of the behavior of sandstones by means of a constitutive equation in such a way as to satisfy certain mathematical requirements. A finite element model using nonlinear stress-strain relationship was developed which simulates the stress state of a structure up to failure. The finite element model was used to predict fracture pressure around a borehole during drilling. The shape of the borehole is either circular or elliptic, and the tectonic stress is directional.

Original language | English |
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Title of host publication | Society of Petroleum Engineers of AIME, (Paper) SPE |

Place of Publication | Dallas, Tex |

Publisher | Soc of Pet Eng of AIME |

Publication status | Published - 1980 |

Event | Soc Pet Eng AIME Pap SPE Presented at the Annu Fall Tech Conf and Exhib, 55th - Dallas, TX, USA Duration: 1980 Sep 21 → 1980 Sep 24 |

### Other

Other | Soc Pet Eng AIME Pap SPE Presented at the Annu Fall Tech Conf and Exhib, 55th |
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City | Dallas, TX, USA |

Period | 80/9/21 → 80/9/24 |

### Fingerprint

### ASJC Scopus subject areas

- Engineering(all)

### Cite this

*Society of Petroleum Engineers of AIME, (Paper) SPE*Dallas, Tex: Soc of Pet Eng of AIME.

**CONSTITUTIVE EQUATION FOR NONLINEAR STRESS-STRAIN CURVES IN ROCKS AND ITS APPLICATION TO STRESS ANALYSIS AROUND A BOREHOLE DURING DRILLING.** / Morita, Nobuo; Gray, K. E.

Research output: Chapter in Book/Report/Conference proceeding › Chapter

*Society of Petroleum Engineers of AIME, (Paper) SPE.*Soc of Pet Eng of AIME, Dallas, Tex, Soc Pet Eng AIME Pap SPE Presented at the Annu Fall Tech Conf and Exhib, 55th, Dallas, TX, USA, 80/9/21.

}

TY - CHAP

T1 - CONSTITUTIVE EQUATION FOR NONLINEAR STRESS-STRAIN CURVES IN ROCKS AND ITS APPLICATION TO STRESS ANALYSIS AROUND A BOREHOLE DURING DRILLING.

AU - Morita, Nobuo

AU - Gray, K. E.

PY - 1980

Y1 - 1980

N2 - The stress-strain behavior of Berea, Ohio, and Pecos sandstone was measured intensively under triaxial loading paths. Both compression and extension tests were performed at different pore fluid pressures. The characteristics of these modes were studied, and a nonlinear model was developed to represent the important characteristics, i. e. , the four modes, of the behavior of sandstones by means of a constitutive equation in such a way as to satisfy certain mathematical requirements. A finite element model using nonlinear stress-strain relationship was developed which simulates the stress state of a structure up to failure. The finite element model was used to predict fracture pressure around a borehole during drilling. The shape of the borehole is either circular or elliptic, and the tectonic stress is directional.

AB - The stress-strain behavior of Berea, Ohio, and Pecos sandstone was measured intensively under triaxial loading paths. Both compression and extension tests were performed at different pore fluid pressures. The characteristics of these modes were studied, and a nonlinear model was developed to represent the important characteristics, i. e. , the four modes, of the behavior of sandstones by means of a constitutive equation in such a way as to satisfy certain mathematical requirements. A finite element model using nonlinear stress-strain relationship was developed which simulates the stress state of a structure up to failure. The finite element model was used to predict fracture pressure around a borehole during drilling. The shape of the borehole is either circular or elliptic, and the tectonic stress is directional.

UR - http://www.scopus.com/inward/record.url?scp=0019341222&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0019341222&partnerID=8YFLogxK

M3 - Chapter

BT - Society of Petroleum Engineers of AIME, (Paper) SPE

PB - Soc of Pet Eng of AIME

CY - Dallas, Tex

ER -