Geostress logging evaluation method of Longmaxi Formation shale in Fuling area based on transversely isotropic model,Sichuan Basin

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  • Research Institute of Petroleum Exploration and Development,SINOPEC Jianghan Oilfield Company,Wuhan 430223,China

Received date: 2018-07-17

  Revised date: 2018-10-25

  Online published: 2019-01-14

Abstract

Shale exhibits anisotropy because of preferred alignment of clay particles and tabular bedding.It is not appropriate to compute stress with isotropic model.We introduce a stress logging evaluation method for Longmaxi Formation shale based on transversely isotropic model by analyzing the relation between vertical effective stress and shear wave velocity to predict formation pressure,building rock physics model to compute Biot coefficient and using velocity-regression method to calculate stiffness coefficients.The application results indicate that transversely isotropic model reflects the actual formation more accurately.

Cite this article

Zou Xian-jun, Chen Ya-lin . Geostress logging evaluation method of Longmaxi Formation shale in Fuling area based on transversely isotropic model,Sichuan Basin[J]. Natural Gas Geoscience, 2018 , 29(12) : 1775 -1780 . DOI: 10.11764/j.issn.1672-1926.2018.10.017

References

[1]Anderson E M.The Dynamics of Faulting and Dyke Formation with Applications to Britain[M].Edinburgh:Oliver and Boyd,1951:7-22.
[2]Matthews W R.How to predict formation pressure and fracture gradient from electric and sonic logs[J].Oil and Gas,1967,65:92-106.
[3]Huang Rongzhun,Zhuang Jinjiang.A new prediction method of fracture pressure[J].Oil Drilling & Production Technology,1986,8(3):1-14.
黄荣樽,庄锦江.一种新的地层破裂压力预测方法[J].石油钻采工艺,1986,8(3):1-14.
[4]Li Zhiming,Zhang Jinzhu.In-situ Stress and Petroleum Exploration & Development[M].Beijing:Petroleum Industry Press,1997:145-177.
李志明,张金珠.地应力与油气勘探开发[M].北京:石油工业出版社,1997:145-177.
[5]Thiercelin M J,Plumb R A.A core-based prediction of lithologic stress contrasts in east Texas Formations[J].SPE Formation Evaluation,1994,9(4):251-258.
[6]Higgins S M,Goodwin S A,Bratton T R,et al.Anisotropic Stress Models Improve Completion Design in the Baxtershale[C].SPE Annual Technical Conference and Exhibition.Denver:Society of Petroleum Engineers,2008.
[7]Couzens-Schultz B A,Axon A,Azbel K,et al.Pore Pressure Prediction in Unconventional Resources[C].International Petroleum Technology Conference.Beijing:Society of Petroleum Engineers,2013.
[8]Eaton B A.The Equation Forgeopressure Prediction from Well Logs[C].Fall meeting of the Society of Petroleum Engineers of AIME.Dallas:Society of Petroleum Engineers,1975.
[9]Bowers G L.Pore pressure estimation from velocity data:Accounting for overpressure mechanisms besides undercompaction[J].SPE Drilling & Completion,1995,10(2):89-95.
[10]Biot M A,Willis D G.The elastic coefficients of the theory of consolidation[J].Journal of Applied Mechanics,1957,24:594-601.
[11]Olsen C,Hedegaard K,Fabricius I L,et al.Prediction of Biot’s coefficient from rock-physical modeling of North Sea chalk[J].Geophysics,2008,73(2):89-96.
[12]Mavko G,Mukerji T,Dvorkin J.The Rock Physics Handbook:Tools for Seismic Analysis of Porous Media[M].London:Cambridge University Press,2009:26-28.
[13]Schoenberg M.Introducing ANNIE:A simple three parameter anisotropic velocity model for shales[J].Journal of Seismic Exploration,1996,5:35-49.
[14]Quirein J,Eid M,Cheng A.Predicting the Stiffness Tensor of a Transversely Isotropic Medium When the Vertical Poisson’Sratio is Less Than the Horizontal Poisson’Sratio[C].SPWLA 55th Annual Logging Symposium.Abu Dhabi:Society of Petrophysicists and Well-Log Analysts,2014.
[15]Murphy E,Barraza S R,Gu M,et al.New Models for Acoustic Anisotropic Interpretation in Shale[C].SPWLA 56th Annual Logging Symposium.Long Beach:Society of Petrophysicists and Well-Log Analysts,2015.
[16]Vernik L,Liu X.Velocity anisotropy in shales:A petrophysicalstudy[J].Geophysics,1997,62(2):521-532.
[17]Sone H.Mechanical Properties of Shale Gas Reservoirrocks,and Its Relation to the In-situ Stress Variation Observed in Shale Gas Reservoirs[D].Palo Alto:Stanford University,2012:48-49.
[18]Deng J,Shen H,Xu Z,et al.Dynamic elastic properties of the Wufeng-Longmaxi Formation shale in the southeast margin of the Sichuan Basin[J].Journal of Geophysics and Engineering,2014,11(3):35-40.
[19]Ma Xiaodong,Zoback M D.Lithology-controlled stress variations and pad-scale faults:A case study of hydraulic fracturing in the Woodford Shale,OklahomaWoodford Shale case study[J].Geophysics,2017,82(6):35-44.
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