Beauheim 1987 - Waste Isolation Pilot Plant - U.S. Department of ...

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..CI__._._..__....__.I 5.2.2.6 H-15. Drillstem testing of the Culebra at H-15 was planned to try to confirm the low transmissivity assumed for the eastern part of the WlPP site on the basis of measurements made at H-5 and P-18 (Mercer, 1983). The Culebra lies from 861 to 883 ft below land surface at H-15 (Figure 3-7). The actual interval tested extended from the bottom of the well casing at 853 ft to the then-bottom of the hole at 891 ft. Hence, the lower 8 ft of the Tamarisk Member and the upper 8 ft of the unnamed lower member of the Rustler were tested along with the Culebra. Because these portions of the members overlying and underlying the Culebra are composed of anhydrite and mudstone, they are not thought to have contributed significantly to the transmissivity measured during the Culebra testing and were, therefore, ignored in the analysis. The Culebra testing at H-15 began on November 11, 1986, the day after the Culebra interval was cored, and continued until November 13, 1986. The testing consisted of two DST flow periods and two buildup periods, followed by a rising-head slug test (Figure 5-35). The FFL lasted about 26 minutes, followed by an 865-minute FBU. The SFL lasted about 40 minutes, and was followed by a SBU lasting about 315 minutes. In order to obtain constant rates for the FEU and SBU analyses, the FFL was divided into two shorter flow periods, and the SFL was divided into three shorter flow periods. The rates for the FFL were 0.147 and 0.127 gpm, and those for the SFL were 0.153, 0.124, and 0.110 gpm (Table 5-1). The slug test lasted about 1029 minutes, by which time about 92% of the induced pressure differential had dissipated. The H-15 test data are presented in Stensrud et al. (1987). Figure 5-36 shows a log-log plot of the FEU data, along with an INTERPRET-generated simulation. The simulation is representative of a single-porosity medium with a transmissivity of 0.1 5 ftzfday (Table 5-3). Assuming a Culebra porosity of 20%, a total-system compressibility of 1.0 x 10-5 psi-', and a fluid viscosity of 1.0 cp, the skin factor for this simulation is about 2.6, indicating a damaged well. - < ln a c - 0 3 a L 160 148 120 188 e0 68 t - - - - - - 48 " 28 - EQUILIBRATION SWABBING FOR SLUG TEST I , / / PRESSURE ABOVE TEST INTERVAL : p I ......... ........ ....... .. ........... ........ .... ......... f SBu-.- -..... ........ . >BU ....__. ." ...... sBu-.- - __ ~ J j FF L \ SLUG 0 5 10 15 20 25 30 35 40 45 50 Elapsed Time in Hours Start Date: 11/11/3986 Lineor-Linear Sequence Plot Start Time: 10:00:00 ti-15iCULEBRA DOLOMITE DST'S Figure 5-35. H-l5/Culebra Drillstem and Slug Testing Linear-Linear Sequence Plot 74
10’ 1 I I n ui a 3 v) v) W K n MATCH PARAMETERS AP = 1.0 psi t = 1.0 hr PO 0.082 tDKD = 500 CDeZ5 = 3000 PI = 62.0 psia D PRESSURE DATA -% PRESSURE-DERIVATIVE DATA - SIMULATIONS 1 100 IO’ 102 103 DIMENSIONLESS TIME GROUP, tD/CD 104 Figure 5-36. H-l5/Culebra First Buildup Log-Log Plot with INTERPRET Simulation Because of the problems encountered with overpressure skins during the H-14 testing, a different procedure was used in preparing H-15 for testing. After the Culebra was cored at H-15, most of the drilling fluid was evacuated from the borehole in an effort to counteract the overpressurization caused during drilling. The time elapsed from the first penetration of the Culebra by the core bit to the evacuation of the drilling fluid was about 19 hr. By the time the packer was set in preparation for testing the next day, the Culebra had been underpressurized for about 23 hr. The net result was that, when testing began, an underpressure skin was present near the wellbore. This underpressure skin is manifested in Figure 5-36 by the sharp rise of the pressure-derivative data, and the more moderate rise of the pressure data, above the simulations. The underpressure skin is also seen in the dimensionless Horner plot of the FBU (Figure 5-37), which shows the pressure data recovering to the specified static pressure of 149.0 psia until very late time (time increases to the left), at which point the data deviate toward a higher pressure (downward on the plot) . The underpressure skin had less of an effect on the SBU data. The log-log plot of the SBU data (Figure 5-38) still shows some upward deviation of the pressure and pressure-derivative data, but not as much as during the FBU. The simulation shown is representative of a single-porosity medium with a transmissivity of 0.15 ft2lday and a skin factor of 2.9 (Table 5-3), again indicating a damaged well. The dimensionless Horner plot of the SBU (Figure 5-39) also shows underpressure skin effects at late time, but generally the data fit the simulation quite well. Note that, as would be expected with a dissipating underpressure skin, the specified static pressure (p*) of 153.2 psia for the SBU dimensionless Horner plot (Figure 5-39) is higher than the 149.0 psia specified for the FBU dimensionless Horner plot (Figure 5-37). 75
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SANDIA REPORT SAND87 -0039 UC - 70
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SAND87-0039 Unlimited Release Print
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a transmissivity of about 7 x 10-2
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5 . TEST OBJECTIVES AND INTERPRETAT
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3-18 3-19 3-20 3-21 3-22 3-23 3-24
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5-35 H-l5/Culebra Drillstem and Slu
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5-78 5-79 5-80 5-81 5-82 5-83 5-84
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A-2 A-3 A4 A-5 A-6 Single-Porosity
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'H-6 o DOE-2 OHIPP-13 OAIPP 12 OH-1
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WlPP site. The aggregate thickness
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deep. The gamma-ray log used to gui
Page 24 and 25: 3347.11 ft \ - -12.25-inch HOLE -8.
Page 26 and 27: ~ 3409.6 n __ - - HOLOCENE DEPOSITS
Page 28 and 29: Ylf M (t -1wt 5 n nch REAMED BOREHO
Page 30 and 31: 3418.96 n 7.875-inch REAMED BOREHOL
Page 32 and 33: 2.375-inch TUBING 4.5-inch. 9.5 Ibl
Page 34 and 35: WELL CASING 2.375-inch TUBING TEST-
Page 36 and 37: 1.5-Inch GALVANIZED PIPE WELL CASIN
Page 38 and 39: I I I I PRE-TEST STATIC PRESSURE i/
Page 40 and 41: (or areal extent) of the aquifer on
Page 42 and 43: :7001 J EQUILIBRATION / r.. .......
Page 44 and 45: Once straddle tests proved impossib
Page 46 and 47: 1300 c - J PRE-TEST PRESSURE IN TES
Page 48 and 49: - < a m L: * m 3 L a I Start Date:
Page 50 and 51: uildups were caused by the natural
Page 52 and 53: TABLE 5-1 EFFECTIVE DST FLOW RATES
Page 54 and 55: TABLE 5-2 SUMMARY OF NON-CULEBRA SI
Page 56 and 57: simulation shown, however, uses a t
Page 58 and 59: 1 .o 0.9 0.8 p' = 79.08 paig pi = 6
Page 60 and 61: ~ ~~ TABLE 5-3 SUMMARY OF CULEBRA S
Page 62 and 63: Two factors raised questions about
Page 64 and 65: 102 I I 1 1 1 W K 3 v) v) W K n v)
Page 66 and 67: 5.2.2.21 below) and DOE-2 (Beauheim
Page 68 and 69: ..A 225 - PRESSURE ABOVE TEST INTER
Page 70 and 71: 10' n ui K 3 v) v) W a n v) v) 100
Page 72 and 73: 10' MATCH PARAMETERS O n w a 3 v) v
Page 76 and 77: 8.0 1 I I I MATCH PARAMETERS AP 1.0
Page 78 and 79: - 200 150 5 - EQUILIBRATION \Feu 'S
Page 80 and 81: 4.0 1 I 1 1 3.0 I n 2.0 1 .o 0.0 0.
Page 82 and 83: 1.0 0.9 0.8 0.7 0.6 0 0.5 0.4 0.3 0
Page 84 and 85: 3.0 .hl c El2 2.0 . v n I P 1 .o MA
Page 86 and 87: EI€3- 0.9 "O I OOATA - TYPE CURVE
Page 88 and 89: 4.0 I I I 3.0 MATCH PARAMETERS AP =
Page 90 and 91: 1 .o 0.9 0.8 0.7 1 MATCH PARAMETERS
Page 92 and 93: 1 .o 0.9 0.8 0.7 0.6 0 2 0.5 I 0.4
Page 94 and 95: 1.0, 0 I 0.9 0.8 0.7 0.6 0.5 0.4 MA
Page 96 and 97: P-15 was bailed on four occasions i
Page 98 and 99: 1 .o 0.9 0.8 - p’ = 78.93 prig p,
Page 100 and 101: Two type-curve matches are shown wi
Page 102 and 103: 0 5 I ELAPSED TIME. hours Figure 5-
Page 104 and 105: 10’ 1 I I I n a w 5 100 v) v) W a
Page 106 and 107: MATCH PARAMETERS -ip 10 PSI 150 t 1
Page 108 and 109: Considering that all other pumping
Page 110 and 111: I ,EQUILIBRATION BUILDUP Elapsed Ti
Page 112 and 113: 0 9. w 10’ K =a 100 v) v) W a n v
Page 114 and 115: 10’ I I I a J P 100 v) v) W a n v
Page 116 and 117: ~ ~. SLUG t i /- i 3 Start Date 07
Page 118 and 119: Figure 5-94 is a log-log plot of th
Page 120 and 121: was followed by a 92-minute FBU. Th
Page 122 and 123: 10’ 1 1 1 1 a n w’ a = 100 v) v
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and anhydrite, and were not conside
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4.0 MATCH PARAMETERS .A. L. 21% 3.0
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Estimates of the static formation p
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10’ n w 2 100 v) v) w a P v) v) w
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OWIPP-28. 70 OWIPP-27.650 OWIPP-30.
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to Nash Draw where no halite is pre
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observations regarding the potentia
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7. SUMMARY AND CONCLUSIONS Single-w
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REFERENCES Bachman, G.O. 1984. Regi
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INTERA Technologies, Inc. 1986. WlP
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Stensrud, W.A.; Bame, M.A.; Lantr,
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(A-4)
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distinct value of Coe2s. Pressure-d
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The wellbore storage coefficient is
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where: n = number of normal sets of
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(A-21) and for spherical blocks the
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where: tp* = Vfq, V = total flow pr
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Figure A-5. Semilog Slug-Test Type
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A.4 INTERPRET WELL-TEST INTERPRETAT
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DISTRIBUTION: U. S. Department of E
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INTERA Technologies, Inc. (9) 6580
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WlPP Public Reading Room Carlsbad M
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Nationale Genossenschaft fur die La
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