This paper presents work conducted on borehole stability of consolidated and unconsolidated sandstone formations. A simplified stress equation, developed for work in mine tunnels in soft sedimentary rocks, which has been modified for the case of petroleum reservoir rocks is presented. A method of determining failure criteria from limited unconsolidated samples is presented, and the results used to predict the extent of a failed zone in an unconsolidated formation for various mud weights.
|Title of host publication||Offshore Europe 91 - Proceedings|
|Number of pages||10|
|Publication status||Published - 1991|
|Event||Offshore Europe 91 - Aberdeen, United Kingdom|
Duration: 3 Sep 1991 → 6 Sep 1991
|Conference||Offshore Europe 91|
|Period||3/09/91 → 6/09/91|