Exact(7)
Figure 5 also shows that the stability of the horizontal borehole (i = 90o) is lower than the vertical one (i = 0°); therefore it needs higher minimum overbalance pressure for being stable.
These samples were cored so that their axes were parallel to the EPS-1 borehole (i.e. perpendicular to bedding).
In this experiment, the data used for imaging are densely sampled in the borehole, i.e. there are 81 receivers separated by approximately 12 m.
In this experiment, the data are sparsely sampled in the borehole, i.e. there are only six receivers obtained by selecting every 16th receiver from the original set.
In addition, two cylindrical samples (of the same dimensions) of each of the twelve sandstones were prepared perpendicular to the borehole (i.e. parallel to bedding).
The location of Borehole I is shown with a thick, continuous line.
Similar(53)
Our approach identifies combinations of UCS and far-field horizontal stress magnitude that are consistent with observed breakout widths at the two adjacent boreholes (i.e., measured breakout widths where they are documented, and zero width where there are no breakouts).
Additionally, Boreholes I and IV are located east of the major fault, while Boreholes II and III are west of it.
Forty undisturbed and disturbed samples were collected from four boreholes (I: Tahta, II: Sohag, III: Akhmim and IV: Aulad Toq Sharq, Figs. 2, 3).
In Boreholes I and IV, however, the presence of convection in the deep reservoir tends to reduce or buffer the differences in temperature, particularly for the high-temperature scenarios.
A similar comparison was made for the effective borehole strength, i.e. the strength averaged over all test depths in a particular borehole.
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