ADMINISTRATIEVE & TECHNISCHE GEGEVENS
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DISTRIGAS WELL : DZH18
LOCATION : RIJKEVORSEL
OPERATOR : DISTRIGAS/BGD
CONTRACTOR : FORAKY
DATE : 24 FEBRUARY - 6 APRIL 1992
DIAMETERS : 17 1/2", 12 1/4", 8 1/2", 63
COORDINATES : X = 175.787; Y = 225.913
GROUND LEVEL : Z = +28 m
TOTAL DEVIATED DEPTH (DD) : 1600 m
TOTAL VERTICAL DEPTH (VD) : 1497 m
SAMPLE REF. DEPTH : RTKB = Z + 4.35 m
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
DESCRIPTION DD VD
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
----------------------------ROTARY DRILLING 17 1/2"---------------------------
No samples 0 - 50 m
----------------------------ROTARY DRILLING 12 1/4"---------------------------
- Browngrey medium sand with weathered
glauconite grains, lignite, silex and
pyrite nodules. 55 55
- Green glauconite-rich medium and coarse
sand, rich in shell fragments. Glauconite
occurs as pale green dull rounded grains
or as dark green lobate grains. Some brown
accessory minerals. 60 60
- Ditto 65 65
- Ditto 70 70
- Grown glauconitic medium and coarse
sand. Half of the glauconite, mainly
the dull rounded ones, look brown and
weathered. Many quartz grains are coated
with iron oxides. 75 75
- Green grey fine to medium glauconitic
sand. Less glauconite than above. Mainly
dark green lobate glauconite. Small concre-
tions of quartz with cement of iron oxides. 80 80
- Ditto, mainly fine grained. 85 85
- Ditto, mainly fine grained sand. 90 90
- Ditto, still ferruginous concretions 95 95
- Ditto 100 100
- Ditto 105 105
- Ditto 110 110
- Ditto, finer grained 115 115
- Ditto 120 120
- Ditto, slight increase of glauconite 125 125
- Ditto, more glauconite 130 130
- Ditto: green grey fine glauconitic sand 135 135
- Green glauconite-rich fine sand (50% of
glauconite) 140 140
- Ditto, with shell fragments 145 145
- Ditto, with shell fragments 150 150
- Green grey fine sand, less glauconite
and a few shell fragments 155 155
- Green grey very fine glauconitic sand,
mixed with clay 160 160
- Green grey very fine glauconitic sand
and sandy clay. Many gravel particles:
very coarse quartz, shell fragments,
black phosphate nodules and glauconite-rich
calcareous limestone 165 165
- Grey sandy clay with glauconite and gravel
as above. 170 170
- Ditto, less gravel 175 175
- Grey clay and sandy clay with shell
fragments 180 180
- Ditto 185 185
- Grey heavy clay 190 190
---------------------------START TURBO DRILLING 12 1/4"-----------------------
- Green glauconite fine sandy clay with
shell fragments, pyrite nodules and
cylindric concretions, paint from BHA. 195 195
- Ditto sandy clay, rich in pyrite nodules
and septaria fragments, among which coated
with orange-brown calcite. 200 200
- Ditto, less sand. Pyrite as nodules and
cylindric concretions. 205 205
- Grey clay with sand glauconite rich fine
sand. A notable coarse fraction including
pyrite and phosphate nodules, shell fragments
and septaria cuttings. 210 210
- Ditto; among septaria fragments: light
yellowish grey septaria with pyrite coatings. 215 215
- Ditto
- Ditto; brown weathered glauconite in sand
fraction. 225 225
- Ditto 230 230
- Ditto 235 235
- Ditto 240 240
- Ditto 245 245
- Ditto 250 250
- Ditto 255 255
- Ditto 260 260
- Grey clay, less glauconite in sand
fraction, less pyrite and septaria
fragments. 265 265
- Ditto 270 270
- Grey sandy clay with glauconite 275 275
- Ditto 280 279.5
- Brown grey sandy clay, few glauconite
grains, a lot of them brown and weathered. 285
- Grey clayey sand with some glauconite
Pyrite. 290 298.3
- Green grey sandy clay with glauconite. 395
- Ditto, with pyrite and septaria cavings. 300 299
- Green grey clayey sand with glauconite. 305
- Green grey sandy clay with glauconite. 310 308.9
- Green grey clayey sand with glauconite. 315
- Green grey clay. Some sand with
glauconite. 320 318.5
- Green grey sandy clay with glauconite. 325
- Green grey clay with some glauconite. 330 328
---------------------Bit balling, COB, Rotary Drilling 12 1/4"----------------
- Green grey clay and sandy clay with
pockets of carbonaceous sand with lignite.
A wood fragment, 8 x 3 x 0 cm. Another
one 15 x 8 x 2cm was found later on the
shale shaker. 340 338.7
- Green grey sandy clay. Sand contains
glauconite. Pyrite nodules, lignitic
sand pockets. 350 347
- Grey clay with fine sand, rich in fine
to medium grained glauconite. Shell
fragments and Nummulites wemmelensis. 360 356
- Fine to medium sand with some
glauconite as above and brown clay.
Nummulites, shell fragments and sandy
limestone cuttings. 370 366
- Fine to medium sand with glauconite,
shell fragments, nummulites, sandy
limestone, bryozoa and microfossils. 375
- Ditto 380 375
- Ditto, less nummulites 385
- Ditto, pyrite cavings 390 385.2
- Ditto, pyrite cavings 395
- Ditto 400 394.8
- Ditto 405
- Ditto 410 404.2
-----------------------COB Turbo drilling 12 1/4"-----------------------------
- Fine to medium sand with glauconite,
lignite, shell and sandy limestone
fragments and nummulite cavings. 415
Ditto 420 413
- Fine to medium sand with glauconite. 425
- Ditto 430 423,1
- Ditto, some lignite. 435
- Green grey glauconitic very fine sand
and silt, slightly clayey. Some stone
fragments. 440 432.4
- Ditto, nummulites (cavings?) 445
- Green grey very fine clayey sand and
silt with glauconite. 450 441
- Ditto, some lignite 455
- Ditto 460 450.9
- Ditto 465
- Green grey silty clay with some sand,
glauconite and shell fragments. 470 460.1
- Green clay with some very fine sand and
silt, stone and shell fragments. 475
- Ditto 480 469.1
- Ditto, less stone 485
- Ditto, with some sand 490 478
Ditto 495
- Ditto 500 486.9
------------------------COB Rotary drilling 12 1/4"---------------------------
- Ditto, much cavings 505
- Grey clay with some glauconitic sand 510 495
- Ditto 515
Ditto 520 504.3
- Ditto 525
- Ditto 530 512
- Ditto 535
- Ditto 540 521.2
-----------------------COB Rotary drilling 8 1/2"-----------------------------
- Grey heavy clay with cement fragments 545
- Ditto 550 529
- Ditto 555
- Ditto 560 538
Ditto 565
- Ditto 570 546
- Ditto 575
- Ditto 580 554
Ditto 585
- Green grey heavy clay with some sand
with glauconite. 590 563.0
- Grey to brown clay with sand and abundant
shell fragments. 595
- Grey to brown clay with shell fragments 600 571.4
- Ditto 605
Ditto 610 579.8
- Grey heavy clay, some shell fragments 615
- Ditto 620 588
- Grey sandy clay, some shell fragments 625
- Grey sandy clay 630 596.3
- Ditto 635
- Ditto 640 604
- Ditto 645
Ditto 650 612.9
- Ditto 655
- Ditto 660 621.3
- Ditto 665
Ditto 670 629
- Grey heavy clay 675
- Ditto 680 637.9
Ditto 685
- Ditto 690 646.3
- Ditto 695
- Ditto 700 654.6
- Light grey clay, calcareous 705
- Ditto, lighter grey marly clay 710 663.0
- Grey marly clay 715
- Ditto 720 671.2
- Grey marly clay, sand with glauconite
and calcarenite. 725
- Grey calcarenite, consisting of fine
sand sized calcite, clay cavings and sand
with glauconite. 730 679.6
- Ditto, less cavings 735
- Grey calcarenite with fossils fragments, 740 687.9
- Ditto with fossil fragments bryozoans,
foraminifera, shell fragments. Still cavings
of clay and pyrite. 745
- Ditto 750 696.2
- Ditto with some flint. Iron curls. 755
Ditto 760 704.5
- Calcarenite with chalk. Some flint.
Still clay cavings. 765
- White chalk with calcarenite. Micro
fossils, flint. 770 712.8
- White chalk with some calcarenite. Flint. 775
Shell fragments, iron curls.
- White chalk with flint. Some shell
fragments. Glauconite grains. 780 721.1
--------------------------------------COB-------------------------------------
- Medium grained calcarenite with flint,
Glauconite. Still clay cavings. 785
- Calcarenite and chalk, rich in flint.
Iron curls. 790 729.5
- Chalk with calcarenite. Iron curls. 795
- White chalk, few calcarenite. Rich in
flint. 800 737.8
- Chalk and calcarenite. Rich in black and
grey flint. Iron curls. 805
- Ditto 810 746.1
- Calcarenite, abundant grey and black
flint. Iron curls. 815
- Ditto with glauconite. 820 754.4
- White chalk rich in flint. Iron curls. 825
- White chalk with glauconite. Rich in
black and grey flint. Bit curls. 830 762.7
- Ditto 835
- Ditto, a few fossils, less glauconite. 840 771,0
- White chalk with black and grey flint. 845
----------------------------COB Turbo drilling 8 1/2"-------------------------
- No sample 850 779.4
- No sample 855
- No sample 860 787,9
- No sample 865
- Grey-white calcarenite with flint,
clay cavings, some glauconite (sample
not reliable). 870 796,5
- No sample 875
- Grey chalk, some granular calcite 880 805.2
- Ditto 885
- No sample 890 813.9
- Grey chalk with echinoid spines. 895
No sample 900 822.7
- No sample 905
- White chalk with white and grey flint,
some glauconite, shell fragments, echinoid
spines, microfossils and clay cavings. 910 831.5
- Ditto 915
- White chalk, rich in white and grey
flint. Richer in fossils and fossil
fragments than above. Some quartz and
glauconite 920 840.4
- Ditto, richer in flint 925
- Ditto, some glauconite, clay cavings. 930 849.3
- Ditto 935
- White chalk with mainly white flint.
More microfossils than above. 940 858.2
- Ditto 945
- Ditto 950 867.2
- No sample 955
- White chalk with grey and white flint.
Microfossils, glauconite. 960 876.2
- Ditto, somewhat more glauconite. 965
- White calcarenitic chalk, rich in
microfossils. Flint less abundant than
above. 970 885.2
- Ditto, more flint, some glauconite. 975
- Ditto, again less flint 980 894.3
- White calcarenitic chalk, rich in
microfossils. 985
Ditto 990 903.5
- Ditto 995
-----------------------------CDE Rotary drilling 8 1/2"-----------------------
- No sample 1000 912.7
- White calcarenitic chalk with small
flint fragments and microfossils. 1005
- Ditto 1010 921.9
- Ditto, clay cavings 1015
- Grey chalk with flint and clay cavings 1020 931.1
- Grey marl with cavings of flint,
microfossils and clay. Iron curls. 1025
- Ditto 1030 940.4
- Grey marl with clay cavings. 1035
- Grey man with clay, flint and micro-
fossil cavings. Iron curls. 1040 949.7
- Ditto 1045
- Ditto 1050 959.0
- Ditto 1055
- Dark grey micaceous shale and siltstone.
Chalk, marl and flint cavings. 1060 968.3
- Dark grey micaceous shale and siltstone.
Grey and brown grey sandstone (20-25% of
non-cavings). Pyrite and coal. Chalk,
marl and flint cavings. 1065
- Ditto, less coal and pyrite 1070 977.6
- Dark grey micaceous shale and siltstone
Grey and brown grey sandstone, some with
quartz veins. Chalk cavings. 1075
- Ditto, less cavings. 1080 987.0
- Ditto, few cavings 1085
- Ditto, few cavings. 1090 996.4
---------------------------------Check trip-----------------------------------
- Ditto, cavings due to check trip 1095
- Dark grey micaceous shale and siltstone,
grey and brown sandstone. Few chalk cavings. 1100 1005.8
- Ditto 1105
- Ditto 1110 1015.2
- Dark grey micaceous shale and siltstone.
Few sandstone. 1115
- Grey sandstone (70%). Dark grey shale
and siltstone. Quartz veins. Some pyrite. 1120 1024.6
- Grey sandstone (80-90%). Dark grey shale
and siltstone. Vein quartz and pyrite. 1125
- Ditto, some coal. 1130 1034,1
- Dark grey micaceous shale and siltstone.
Sandstone (10%). Quartz. 1135
- Ditto, some pyrite 1140 1043.5
- Ditto 1145
- Dark grey micaceous shale and siltstone,
sandstone (max.5%). Vein fragments. 1150 1053.0
- Ditto 1155
- Ditto, some coal 1160 1062.5
Ditto 1165
- Ditto, less vein fragments 1170 1072.1
- Dark grey micaceous shale and siltstone.
Few sandstone and vein fragments. 1175
- Ditto 1180 1081.7
- Ditto 1185
- Ditto 1190 1091.3
- Ditto 1195
-----------------------------------COB----------------------------------------
- Ditto, more sandstone 1200 1100.9
- Dark grey micaceous shale and siltstone.
About 10% sandstone and 10% coal. White
vein fragments. Calcimetry 2%. 1205
- Grey sandstone (70-80%). Dark grey shale
and siltstone, white vein fragments Coal. 1210 1110.5
- Ditto 1215
- Grey sandstone (50%) and dark grey
micaceous shale and siltstone. Vein
fragments. 1220 1120.2
- Ditto, 2% coal 1225
- Ditto, less coal 1230 1129.8
- Dark grey micaceous shale and siltstone.
Grey sandstone 30%. 1235
- Dark grey micaceous shale and siltstone.
Grey sandstone 10%. 1240 1139.5
- Ditto 1245
- Dark grey ericaceous shale and siltstone.
Grey sandstone max. 5%. 1250 1149.2
- Ditto 1255
- Ditto 1260 1158.9
- Ditto, some coal 1265
Ditto 1270 1168.7
- Ditto 1275
- Ditto 1280 1178.5
- Ditto 1285
- Ditto 1290 1188.3
- Ditto 1295
- Ditto: dark grey micaceous shale and
siltstone, max. 5% of sandstone. 1300 1198.1
Ditto 1305
--------------------------------Check trip------------------------------------
- Ditto 1310 1208.0
- Ditto 1315
- Ditto 1320 1217.9
- Ditto 1325
- Ditto 1330 1227.8
- Ditto 1335
- Ditto 1340 1237.7
- Ditto 1345
- Dark grey micaceous shale and siltstone.
Grey sandstone 5 - 10%. 1350 1247.6
- Dark grey micaceous shale and siltstone
Grey sandstone 15%. 1355
- Dark grey micaceous shale and siltstone
Grey sandstone 5 - 10%. 1360 1257.5
- Dark grey micaceous shale and siltstone
Grey sandstone max. 5%. 1365
- Ditto 1370 1267.5
- Ditto 1375
- Ditto 1380 1277.4
- Ditto 1385
- Ditto 1390 1287.4
-----------------------------Rotary drilling 6"-------------------------------
- Ditto 1395
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Core#1: 1396 - 1405 m DD (100%). Dark grey shale with
intercalations of siltstone and very fine sandstone, occasionally with
slumping structures. Thin white veins
(anhydrite?). Pyrite nodules up to 6 cm.
------------------------------------------------------------------------------
- Dark grey micaceous shale and siltstone.
Grey sandstone max. 5%. 1410 1307.3
- Ditto 1415
- Ditto 1420 1317.3
- Ditto 1425
- Dark grey micaceous shale and siltstone.
Grey sandstone (25-30%). Quartz vein
regiments, sometimes with pyrite. Abundant
iron from bit. 1430 1227.3
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Core#2: 1431 - 1433 in DD (95%). Grey quartzitic sandstone with quartz veins
and pyrite, chalcopyrite and sphalerite. At 1431.5 m: 0.5 m of massive
sphalerite with pyrite and chalcopyrite. At 1431.82 m: massive grey limestone.
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Core#3: 1433 - 1440.8 m DD (1338 in VD) (100%). Massive grey limestone with
stylolites, calcite veins and some fossils.
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Core#4: 1441 - 1446.6 in DD (100%). Massive grey limestone with stylolites,
calcite veins and some fossils.
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Core#5: 1441.6 - 1457.3 in DD (1450 in DD = 1347.2 in VD); (98
%). Massive grey limestone with stylolites, calcite veins and some fossils.
Subvertical (70-80_) fractures and calcite veins.
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Core#6: 1457.3 - 1465.8 in DD (1460 in DD = 1357.2 in VD); (100%). Massive
grey limestone with stylolites, calcite veins and some fossils. Subvertical
(7080_) fractures and calcite veins. From 1465.4 in DD more subvertical
calcite veins, partly open with free growing crystals.
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Coire#7: 1465.8 - 1468.4 m DD (60%). Massive grey limestone with stylolites,
calcite veins and some fossils. Subvertical (70-80_) fractures and calcite
veins, partly open with free growing crystals.
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Core#8: 1468.4 - 1481.4 m DD (1470 m DD = 1367.1 m VD, 1480 m DD = 1377.1 m
VD) (100%). Massive grey limestone with stylolites, calcite veins and some
fossils. Subvertical (70-80_) fractures and calcite veins, up to 5 cm thick,
partly open with free growing crystals. Some macrofossils:
brachiopods, corals, crinoids.
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Core#9: 1481.0 1490.6 m DD (1490 m DD = 1387.1 VD) (100%). Massive grey
limestone with stylolites, calcite veins and some fossils. Subvertical (70-
80_) fractures and calcite veins, up to 5 cm thick, partly open with free
growing crystals. Some macrofossils: brachiopods, corals, and crinoids.
------------------------------------------------------------------------------
Core#10: 1490.6 - 1497.6 m DD (81.4%). Massive grey limestone with stylolites,
calcite veins and some fossils. Subvertical (70-80_) fractures and calcite
veins, up to 5 cm thick, partly open with free growing crystals. Some
macrofossils: brachiopods, corals, crinoids.
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Core#11: 1497.7 - 1501.7 m DD (1500 m DD = 1397.0 m VD) (99%) Massive grey
limestone with stylolites, calcite veins and some fossils. Subvertical (70-
80_) fractures and calcite veins, up to 5 cm thick, partly open with free
growing crystals. Some macrofossils: brachiopods, corals, and crinoids.
------------------------------------------------------------------------------
Core#12: 1501.7 - 1508.1 m DD (100%). Massive grey limestone with stylolites,
calcite veins and some fossils. Subvertical (70-80_) fractures and calcite
veins, up to 5 cm thick, partly open with free growing crystals. Some
macrofossils: brachiopods, corals, crinoids.
------------------------------------------------------------------------------
Core#13: 1508.1 1512.9 in DD (1510 in DD = 1407.0 m VD) (100%). Massive grey
limestone with stylolites, calcite veins and some fossils. Subvertical (70
80_) fractures and calcite veins, up to 5 cm thick, partly open with free
growing crystals. Some macrofossils: brachiopods, corals, and crinoids
------------------------------------------------------------------------------
Core#14: 1512.9 1523.7 in DD (1520 m DD = 1417.0 m VD) (100%). Massive grey
limestone with stylolites, calcite veins and seine fossils. Subvertical (70
80_) fractures and calcite veins, up to 5 cm thick, partly open with free
growing crystals. Some macrofossils: brachiopods, corals, and crinoid.
Breccia from 1517.14 in to 1519.53 in DD.
------------------------------------------------------------------------------
Core#15: 1523.7 1534.4 in DD (1530 in DD = 1426.9 m VD) (100%). Massive grey
limestone with calcite veins and some fossils. Subvertical (70-80_) fractures
and calcite veins, up to 5 cm thick, partly open with free growing crystals.
Some macrofossils: brachiopods, corals, and crinoids. Many irregular lenses of
calcite with rhomboid fracture. Stylolites are rare.
------------------------------------------------------------------------------
Core#16: 1534,4 - 1544.4 m DD (1540 in DD = 1436.9 m VD) (100%). Massive grey
limestone with calcite veins and some fossils. Subvertical (70-80_) fractures
and calcite veins, up to 5 cm thick, partly open with free growing crystals.
Some macrofossils: brachiopods, corals, and crinoids. Many irregular lenses of
calcite with rhomboid fracture. Stylolites are rare.
------------------------------------------------------------------------------
Core#17: 1544.4 - 1551.9 m DD (1550 m DD = 1446.9 m VD) (100%). Massive grey
limestone with calcite veins and some fossils. Subvertical (70-80_) fractures
and calcite veins, up to 5 cm thick, partly open with free growing crystals.
Some macrofossils: brachiopods, corals, and crinoids. Many irregular lenses of
calcite with rhomboid fracture. Stylolites are rare.
------------------------------------------------------------------------------
Core#18: 1551.9 - 1561.2 m DD (1560 m DD = ca. 1457 m VD) (100%). Massive grey
limestone with calcite veins and some fossils. Subvertical (70-80_) fractures
and calcite veins, up to 5 cm thick, partly open with free growing crystals.
Some macrofossils: brachiopods, corals, and crinoids. Many irregular lenses of
calcite with rhomboid fracture. Stylolites are rare. One open vein with quartz
crystals and skalenoid calcite.
------------------------------------------------------------------------------
Core#19: 1561.2 1571.2 m DD (1570 m DD ca, 1467 m JD) (100%). Massive grey
limestone with calcite veins and some fossils. Subvertical (70-80_) fractures
and calcite veins, up to 5 cm thick, partly open with free growing crystals.
Some macrofossils: brachiopods, corals, and crinoids. Many irregular lenses of
calcite with rhomboid fracture. Stylolites are rare.
------------------------------------------------------------------------------
----------------------------------Rotary drilling 6"--------------------------
- Grey limestone with some calcite and
quartz and shale cavings. 1572
Ditto 1574
- Grey limestone with calcite, no more
cavings 1576
- Ditto 1578
- Ditto 1580 1477
- Ditto 1582
- Ditto 1584
- Ditto 1586
- Ditto 1588
- Ditto 1590 1487
- Ditto 1592
- Ditto 1594
- Ditto 1596
- Ditto 1598
- Ditto 1600 1497
BELGISCHE GEOLOGISCHE DIENST
016E/0178 - KAARTBLAD: OOSTMALLE
p. 11/11
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