full waveform sonic summary 1:200geosensor.com.au/wp-content/uploads/fws-with-density.pdf ·...

FULL-WAVEFORM SONIC WITH DENSITYWhen full-waveform sonic and density are combined such as in this example log it can be possible to extract geotechnical properties such as elastic moduli. Semblance analysis is used to assess both

compressional and shearwave velocities. These are combined with a compensated bulk density log to produce logs of mechanical properties.

PROVINCE:

PROJECT:SERVICE COMP.:PLATFORM:

EASTING:NORTHING:

BOREHOLE RECORD

DRILL START DATE:DRILL END DATE:

DRILL COMPANY:

FIELD:

CASING RECORD

SERVICES

REMARKSBIT SIZE (mm) DEPTH FROM (m) DEPTH TO (m) TYPE DEPTH FROM (m) DEPTH TO (m)

ELEVATION(m):

JOB NUMBER :

FLUID TYPE I.D. (mm)

RIG NUMBER:

WELL AZIM (deg):WELL INCL (deg):

321.7

13.5257.513.5

FULL WAVEFORM SONIC SUMMARY 1:200

109.22DRILLER DEPTH = 321.70 M

STEELLOGGER DEPTH = 320.63 M

0

257.5

NEW LOGGING Inc.

13.50

7595.25114.3

WELL-123

DATE RUN NR. MEASUREMENT TOOL NB. DEPTH FROM(m) DEPTH TO(m) TOOL ZERO FLUID LEVEL(m) ENGINEER REMARKS

5/9/2017 1 Density 111 0 318.07 0 N/A JW DENSITY DOWN5/10/2017 1 Density 111 318.28 0 -0.2 N/A JW DENSITY UP5/11/2017 1 Sonic 1234 0 320.63 0 N/A JW SONIC DOWN5/12/2017 1 Sonic 1234 320.63 141.34 -0.18 N/A JW SONIC UP5/13/2017 2 Sonic 1234 0 157.89 0 N/A JW SONIC DOWN5/14/2017 2 Sonic 1234 157.89 0 -0.07 N/A JW SONIC UP

CURVESDESCRIPTIONTRACK LOGGED FILETITLE DEPTH FROM [m] DEPTH TO [m]

320.62

6

FWS traces from far (3ft) receiver; stacked factor 5;

-

17.00

-

7

4First arrival picks from AMP RX1

320.62

17.00

-

5

3

Natural Gamma Ray from Density; 7 point weighted average filtered

320.62

-

17.00

5

Up Run 1

3

320.62

-

320.6217.00

Caliper from ATV tool; 10 point median filtered -2

17.00

Compensated density; logged inside drill rods; 7 point weighted average filtered

POISSON'S RATIOBULK MODULUS

YOUNG'S MODULUSSHEAR MODULUS

UCSS WAVE VELOCITY

Up Run 1GAM(NAT)

P WAVE VELOCITYS WAVE SLOWNESS

17.00

5

DENSITY

-

17.00

4

CALIPER

Up Run 1 and 2 merged

17.0017.0017.0017.0017.0017.0017.0017.0017.0017.00

-MEASURED DEPTHUp Run 1 and 2 mergedAMP RX1

Computed elastic modulus using P- and S WAVE SLOWNESSComputed elastic modulus using DENSITY, P- and S WAVE SLOWNESSComputed elastic modulus using DENSITY, P- and S WAVE SLOWNESSComputed elastic modulus using DENSITY and S WAVE SLOWNESSUnconfined Compressive Strength computed using General McNally equation;

DT RX1

Shear wave velocity in m/s;Compressional wave velocity in m/s;Estimated shear wave slowness using Christensen's Equation in us/m;Compressional wave slowness derived from velocity analysis in us/m;

AMP RX2First arrival picks from AMP RX2

8

DT RX2

9

320.62

1

P WAVE SLOWNESS

-

-

320.628

FWS traces from near (2ft) receiver; stacked factor 5;

1

--

318.34318.34320.14320.62320.62320.62320.62320.62320.62

320.62

-

8

Depth adjusted to Density

1

MEA

SURE

DDE

PTH

1m:200m

DEPTHGAM(NAT)

0 1000apiDENSITY

4.5 1.5gm/cc

WIRELINE LOGSAMP RX1

-100 1001 600

AMP RX2

-100 1001 600

DT RX1

1 600us

DT RX2

1 600us

P WAVE SLOWNESS

150 700us/m

S WAVE SLOWNESS

150 700us/m

P WAVE VELOCITY

1000 6000m/s

S WAVE VELOCITY

1000 6000m/s

VELOCITY ANALYSIS

POISSON'S RATIO

0 0.5

SHEAR MODULUS

0 70000MPaYOUNG'S MODULUS

0 70000MPaBULK MODULUS

0 70000MPa

UCS

0 200MPa

MECHANICAL PROPERTIES

CALIPER

0 75cm

20

24

28

32

36

40

44

48

52

56

60

64

68

72

76

80

84

88

92

96

100

104

108

112

116

120

124

128

132

136

140

144

148

152

156

160

164

168

172

176

180

184

188

192

196

200

204

208

212

216

220

224

228

232

236

240

244

248

252

256

260

264

268

272

276

280

284

288

292

296

300

304

308

312

316

320

DISCLAIMER

Due to variable well/borehole conditions, well log interpretations are opinions based upon inferences and extrapolation from geophysical borehole log measurements and other collective data. Any interpretation or recommendations either written or oral by Geosensor Data Services Pty Ltd are professional opinions and assumptions and will not be guaranteed for correctness or accuracy.Therefore Geosensor Data Services Pty Ltd shall not be held liable, accountable or responsible under any circumstances for any loss, damage, cost or expense incurred or suffered by any individual or any company resulting from any interpretation. The customer accepts all risk from resulting decisions based on this data. Furthermore, this data is provided under the assumption that all rawmeasurements and collective data provided to us has been calibrated, tested, working within specification and operated correctly by the respective service company. The client is responsible to take up these matters with each service provider for each data set.