E/MJ : engineering and mining journal . r in other wellswill be nullified. Fig. 4 shows the extension of the edge-water downthe flank of the fold to Well No. 38, and, also, theheight to which it has risen, corroborating the con-dition indicated in Fig. 2. The water-bearing sandsin No. 38 at 762 and 785 ft. are correlative withthose in No. 24 and 725 and 742 ft. In Well No. 24,these sands have been shut off from the lower oilsands, but have not been shut off in No. 38 from thesands at 875 and 920 ft. If the sands at 875 and920 ft. were dry in No. 38, they would be a channelfor the migration of
E/MJ : engineering and mining journal . r in other wellswill be nullified. Fig. 4 shows the extension of the edge-water downthe flank of the fold to Well No. 38, and, also, theheight to which it has risen, corroborating the con-dition indicated in Fig. 2. The water-bearing sandsin No. 38 at 762 and 785 ft. are correlative withthose in No. 24 and 725 and 742 ft. In Well No. 24,these sands have been shut off from the lower oilsands, but have not been shut off in No. 38 from thesands at 875 and 920 ft. If the sands at 875 and920 ft. were dry in No. 38, they would be a channelfor the migration of water to the oil sands of No. 24unless thoroughly slimed. As these sands themselvescarry water, it is evident that there should be awater string cemented in No. 24 below the sands at842 to 860 and 872 ft., but above the sand at 900 to Well No. 19, these conditions show thatwhen this well is re-drilled for shut-off of edge-water, the second water string should be cementedin the shale logged at 840 to 860 ft. If this is and all formations are slimed, the lower productivesands will be protected in this and adjoining wells. 4 shows Well No. 36 to be in the zone of edge-water, and No. 34 is east of this zone. Examinationof the remaining well logs shows the line of demaika-tion to be as it is drawn on the field map (Fig. 1). With the extent of the edge-water known, it is atonce evident that Wells Nos. 10, 4, 30, 35, and 34 willsoon show water. When these wells produce water,the source will be known, and the second waterstring cemented at the correct depth without a longand expensive series of bridges and tests on thesands of each well. The first clay or shale stratumbelow the lowest correlative wet sands of Well will be the marker to determine the depth ofcementing. A study of the facts revealed by the cross-sectionleads to the belief that the wells within the zone ofedge-water are on the northeast flank of the appearance of sands that are
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectmineralindustries
