New approach to preventing lost circulation while drilling

Giin Fa Fuh*, Nobuo Morita, P. A. Boyd, S. J. McGoffin


    研究成果: Conference contribution

    115 被引用数 (Scopus)


    This paper presents a new concept, theoretical formulations, and field test results of the loss prevention material (LPM) developed for use in many possible applications such as high-angle and horizontal well drilling, drilling through severely depleted formations (to optimize casing requirements), drilling through highly tectonically active areas (i.e., regions of overthrust faults and salt dome structures) where the in situ rock stresses are high and directionally unequal. Both open-hole microfractures and 5000-ft open-hole leak off tests using LPM were successfully conducted in our wells in Newkirk, Oklahoma, and Ventura, California. LPM is a specially selected (material strength and specific gravity) and narrowly sized granular material which, after being fully mixed in oil or water based mud at an optimum concentration, can provide good protection to formations against lost circulation while drilling. Higher formation fracture resistance resulting from the use of LPM in drilling fluids can reduce or prevent the occurrence of lost circulation while drilling. This paper will show that a remarkable increase of 8.0 ppg in borehole breakdown pressure was achieved in one of our tests in the Newkirk well. An increase of fracture propagation pressure in the range of 3.0 to 6.0 ppg was recorded in the field tests. These results are in general agreement with our laboratory findings also discussed in this paper.

    ホスト出版物のタイトルProceedings - SPE Annual Technical Conference and Exhibition
    Place of PublicationRichardson, TX, United States
    出版社Publ by Soc of Petroleum Engineers of AIME
    出版ステータスPublished - 1992
    イベントProceedings of the 1992 SPE Annual Technical Conference and Exhibition - Washington, DC, USA
    継続期間: 1992 10月 41992 10月 7


    OtherProceedings of the 1992 SPE Annual Technical Conference and Exhibition
    CityWashington, DC, USA

    ASJC Scopus subject areas

    • 地質学
    • 地盤工学および土木地質学


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