Geological Model of Early Sarmatian Horizons of the Underground Gas Storage Tvrdonice (Vienna Basin )

Lukáš Kopal, Kate řina Helešicová, Pavel Čížek

Investigated area

UGS Tvrdonice facts:

• Depleted oil and gas field in the part of Vienna Basin named Central Moravian Depression

• Normal faulted, structural and lithological traps

• UGS started operation in the year 1971

• 3 storage sand horizons - 8th Sarmatian, 12th-14th Sarmatian and 9th Upper Badenian

• In the area of storage permit (4.9 km2) there are more than 63 operation and control wells

• 1 horizon in testing - 9th-11th Sarmatian

Input data for interpretation

� 237 wells ( data of different quality) – drilled from the time of primary production (during World War II) to the present.

� 3D seismic survey (20 km2) acquisition in the year 2002

� 4 check shots in the investigated area

HR-97

HR-91

HR- 86

HR-84

HR-82

HR-78

HR-74HR- 59

HR- 58

HR-56

HR-53

HR-4 6

HR-42

HR- 37

HR-35

HR-34

HR-3 0

HR-28

HR- 24

HR- 237

HR-2 35

HR-232HR-231

HR- 229

HR- 226

HR-224

HR- 222

HR-22

HR-217

HR- 204

HR-2 02

HR-197

HR- 192

HR-19

HR-189

HR-187

HR-18 5

HR- 184

HR-181

HR- 180

HR-178

HR-177

HR-174

HR-168

HR- 167

HR-166HR-165

HR- 164

HR- 163

HR-1 62

HR-161

HR- 160HR-15 9

HR- 156

HR- 149

HR- 148

HR- 147

HR-144

HR-14 0

HR-128

HR- 12 7

HR- 107

HR- 104

HR-103

HR- 164

HR- 163

HR-1 62

HR-161

HR- 160HR-15 9

HR- 156

HR- 149

HR- 148

HR- 147

HR-144

HR-14 0

HR-128

HR- 12 7

HR- 107

HR- 104

HR-103

HR-161

HR- 160HR-15 9

HR- 156

HR- 149

HR- 148

HR- 147

HR-144

HR-14 0

HR-128

HR- 12 7

HR- 107

HR- 104

HR-103

Z-9

Z-8

Z- 72

Z- 71

Z-70

Z-7 Z-69

Z-68

Z-67A

Z-66

Z- 65

Z-64

Z- 63

Z-62

Z-61

Z-60

Z-6

Z-59

Z-58

Z-53

Z-5 2

Z-51

Z-48

Z-45

Z-40

Z-4

Z-39Z-38

Z-37A

Z-36

Z-35 Z-34

Z-33

Z-32

Z-31

Z- 30

Z-3

Z-29

Z-28

Z- 27

Z-26

Z-25

Z-24

Z-23

Z-22

Z-21

Z-20

Z-2

Z-19

Z-18

Z-17

Z- 16

Z- 15

Z-14

Z- 13

Z-12

Z- 11

Z-10

Z- 1

T-47

LA-16

LA- 13

HR-99

HR-96

HR- 95

HR- 94

HR-93

HR-92

HR- 90

HR-9

HR- 89HR-88

HR- 87

HR- 85

HR-8 3

HR- 81

HR-80

HR-8

HR-79

HR- 77

HR-76

HR-75

HR- 73HR-72

HR-71HR-70

HR-7

HR-6 9HR-6 8HR- 67HR-66A

HR- 65

HR- 64HR-63

HR-62HR-61

HR-6

HR- 57

HR-55

HR- 54

HR-52A

HR- 51

HR- 50

HR-5

HR-49

HR-4 8

HR-47

HR-45

HR-44

HR-43

HR-41

HR- 40

HR- 4

HR- 39

HR-38HR-36

HR-33

HR-32

HR- 31

HR-3

HR-29 AHR-29

HR- 27

HR-26

HR-25

HR-246

HR-241

HR-240

HR-239

HR- 238

HR- 234

HR- 23

HR-227

HR-225

HR- 221

HR-22 0HR-219

HR-218

HR-216

HR- 215

HR-214

HR-213

HR-2 12HR-211

HR-210

HR-21

HR-2 09

HR-20 8

HR-20 7

HR- 206

HR-20 5

HR-203

HR-2 01

HR-20

HR-2

HR-199AHR-199

HR-198

HR- 196

HR- 195

HR-194

HR-193

HR-1 91

HR-1 90

HR-188

HR-186

HR-183

HR-182

HR-18

HR-1 79

HR- 176A

HR- 175

HR-17 3

HR-172

HR- 171

HR-170

HR-1 69

HR-1 6

HR-158

HR-157

HR-15 5

HR- 154AHR- 154

HR- 153

HR-152

HR- 151

HR-150

HR- 15

HR-145

HR-143 HR-142

HR-141

HR-1 4

HR-139

HR- 138

HR-137

HR- 136

HR- 135

HR-134

HR- 133

HR-132

HR-131

HR-13 0

HR-13

HR-129

HR-126

HR- 125A

HR-124

HR-123

HR-12 2

HR-1 21

HR-120A

HR-12

HR-119A

HR- 118

HR-117

HR- 116

HR-115

HR-114

HR-113

HR-112HR- 111

HR-110

HR-11

HR-109

HR- 108

HR- 10 6

HR-10 5

HR-102

HR-101

HR- 100

HR-10

HR-1

Copy o f HR-240

BR-30

BR- 25

HR- 228

3642000 3643000 3644000 3645000 3646000 3647000 3648000 3649000

3642000 3643000 3644000 3645000 3646000 3647000 3648000 3649000

5401

000

5402

0005403000

54040005405000

5406

000

5407

000

5408

000

5409000

54100005411000

541200

0

540

1000

540

2000

540

3000

540

4000

5405

000

5406

000

5407

000

540

8000

540

9000

541

0000

5411

000

5412

000

0 500 1000 1500 2000 2500m

1:50000

Seismic Cross-Section and Main Structural Features

8th S

9-11th S

12-14th S

floodplain channels

Lanzhot-Hrusky m

ain fault

Timeslice (-1251 ms) at the Base of the 12th-14th Sarmatian Sand

For early Sarmatian horizons, structure forming of the main fault running continuously since Sarmatian upto Pannonian, probably to present days

2 generations of channels,younger eroded older channel and adjacent floodplains

mai

n fa

ult

younger channel

• Creating a 3D reservoir structural model based on 3D seismic interpretation and well data

• Acoustic impedance sampling from an attribute cube into a 3D grid

• Facies interpretation from well logs

• Facies modeling

• Calculating petrophysical properties from well logs

• 3D property model of porosity and permeability based on AI and facies

Workflow

Interpretation of faults hasbrought these results:

• specification of position of the main fault

• existence of branched minor faults caused open fault blocks to the lower part of the structure.

Workflow

Creating a 3D reservoir structural model based on 3D seismic interpretation and well data

Interpretation tops and bases of early Sarmatian horizons including the 9th-11th and the 12th-14th sandy complexes.

Workflow

It was difficult to interpret no consistent internal surfaces in the channel systems, so this problem was solved in the next step.

Creating a 3D reservoir structural model based on 3D seismic interpretation and well data

Relative acoustic impedance sampling from an attribute cube into a 3 grid.

Workflow

How to capture channels in the early Sarmatian horizons which caused internal lithological changes?

It can be used for:

• 3D trend data for the pixel based method

• collocated co-kriging as a second variable during 3D propagating of porosity.

AI

Recognized fluvial facies from well logs

channels andchannel margins

levees

crevasses

floodplains

Workflow

Facies model of the 9th-11th Sarmatian sandy complex.

•Channels have lower sinuosity and drift than channels in the 12th-14th Sarmatian.•Channels are splitted on the flanks of the older floodplain in the middle partof reservoir

Workflow

Calculating petrophysical properties from well logs

Workflow

Correlation porosity and permeability for fluvial facies in the 12th-14th Sarmatian sandy komplex

levee

Correlation porosity and permeability for fluvial facies in the 12th-14th Sarmatian sandy complex

channel

Main output: 3D property model of porosity and permeability based on AI and facies

9 -11th Sarmatian Base

-120

0

-120

0

3641500 3642000 3642500 3643000 3643500 3644000 3644500 3645000 3645500 3646000 3646500 3647000 3647500 3648000

3641500 3642000 3642500 3643000 3643500 3644000 3644500 3645000 3645500 3646000 3646500 3647000 3647500 3648000

5402

000

5402

500

5403

000

5403

500

5404

000

5404

500

5405

000

5405

500

5406

000

5406

500

5407

000

5407

500

5408

000

5408

500

5409

000

5409

500

5410

000

5410

500

5411

000

5411

500

5412

000

54020005402500

54030005403500

54040005404500

54050005405500

54060005406500

54070005407500

54080005408500

54090005409500

54100005410500

54110005411500

5412000

-5000-4000-3000-2000-10000100020003000

Seismic

0 250 500 750 1000 1250m

1:30000

License

Horizon name

Scale

Contour inc

User name

Date

UGS Tvrdonice

11S_base

1:30000

20

Kopal

09/13/2005

Attribute Map (amplitudes) of the 9-11th Saramatian Sandy Complex - Base

BR-25

BR-30

HR-1

HR-10

HR-100

HR-102

HR-105

HR-106

HR-108

HR-11

HR-110

HR-111HR-112

HR-113

HR-114

HR-115

HR-116

HR-117

HR-118

HR-119A

HR-12

HR-120A

HR-121

HR-122

HR-123

HR-129

HR-13

HR-130

HR-131

HR-132

HR-133 HR-135

HR-136

HR-137

HR-138

HR-139

HR-14

HR-140

HR-141

HR-142HR-143

HR-145

HR-15

HR-151

HR-152

HR-153

HR-154HR-154A

HR-155

HR-158

HR-16

HR-161

HR-166

HR-169

HR-170

HR-172

HR-173

HR-179

HR-18

HR-183

HR-188

HR-19

HR-193

HR-195

HR-198

HR-199HR-199A

HR-2

HR-20

HR-201

HR-203

HR-205

HR-206

HR-207

HR-208

HR-209

HR-21

HR-210

HR-211

HR-212

HR-213

HR-214

HR-215

HR-216

HR-218

HR-219

HR-220

HR-221

HR-23

HR-238

HR-239

HR-240

HR-241

HR-26

HR-27

HR-29A

HR-3

HR-31

HR-32

HR-33

HR-36HR-38

HR-39

HR-4

HR-40

HR-41

HR-43

HR-44

HR-47

HR-48

HR-49

HR-5

HR-50

HR-51

HR-52A

HR-54

HR-55

HR-56

HR-57

HR-6

HR-61

HR-62

HR-63

HR-64

HR-65

HR-66AHR-67

HR-68HR-69

HR-7

HR-70

HR-71

HR-72

HR-73

HR-76

HR-77

HR-79

HR-8

HR-80

HR-81

HR-83

HR-85

HR-87

HR-88

HR-89

HR-9

HR-90

HR-92

HR-93

HR-94

HR-95

HR-96

HR-99

T-47

Z-1

Z-10

Z-11

Z-12

Z-13

Z-14

Z-15

Z-18

Z-19

Z-2

Z-20

Z-21

Z-22

Z-23

Z-24

Z-25

Z-26

Z-27

Z-28

Z-35

Z-36

Z-37A

Z-38Z-39

Z-4

Z-40

Z-45

Z-48

Z-51

Z-52

Z-53

Z-58

Z-59

Z-6

Z-60

Z-64

Z-65

Z-66

Z-67A

Z-7

Z-70

Z-71

Z-72

Z-73A

Z-8

Z-9

3641500 3642000 3642500 3643000 3643500 3644000 3644500 3645000 3645500 3646000 3646500 3647000 3647500

3641500 3642000 3642500 3643000 3643500 3644000 3644500 3645000 3645500 3646000 3646500 3647000 3647500

5402

500

5403

000

540

3500

5404

000

5404

500

5405

000

5405

500

540

6000

5406

500

5407

000

5407

500

540

8000

5408

500

5409

000

540

9500

541

0000

5410

500

5402500

5403000

54035

0054

04000

54045

0054

05000

540550

0540

60005406

5005407

0005407

5005

408000

54085

0054

09000

5409500

5410000

5410500

00.010.020.030.040.050.060.070.080.090.10.110.120.130.140.150.160.17

Por.Eff.

0 250 500 750 1000 1250m

License

Surface name

Scale

Contour inc

User name

Date

UGS Tvrdonice

Average Map of PE911/Zone 9-11s

1:25000

0.01

Kopal

10/12/2005

Average Porosity Map of the 9-11th Sarmatian Sandy Complex

Amplitude map Porosity map

12th-14th Sarmatian - Base

3642400 3642800 3643200 3643600 3644000 3644400 3644800 3645200 3645600 3646000 3646400 3646800

3642400 3642800 3643200 3643600 3644000 3644400 3644800 3645200 3645600 3646000 3646400 3646800

5402

800

5403

200

5403

600

5404

000

5404

400

5404

800

5405

200

5405

600

5406

000

5406

400

5406

800

5407

200

5407

600

5408

000

5408

400

5408

800

5409

200

5409

600

54028005403200

54036005404000

54044005404800

54052005405600

54060005406400

54068005407200

54076005408000

54084005408800

54092005409600

0 200 400 600 800 1000m

1:20000

License

Surface name

Property name

Scale

User name

Date

PZP Tvrdonice 1:20000

Kopal

31/05/2006

Attribute Map (Amplitudes) at the Base of the 12-14th Sarmatian Sandy Complex

3642400 3642800 3643200 3643600 3644000 3644400 3644800 3645200 3645600 3646000 3646400 3646800 3647200

3642400 3642800 3643200 3643600 3644000 3644400 3644800 3645200 3645600 3646000 3646400 3646800 3647200

5402

800

5403

200

5403

600

5404

000

5404

400

5404

800

5405

200

5405

600

5406

000

5406

400

5406

800

5407

200

5407

600

5408

000

5408

400

5408

800

5409

200

5409

600

54028005403200

54036005404000

54044005404800

54052005405600

54060005406400

54068005407200

54076005408000

54084005408800

54092005409600

0.14

0.12

0.1

0.08

0.06

0.04

0.02

0

Por.Eff.

0 200 400 600 800 1000m

1:20000

License

Surface name

Property name

Scale

User name

Date

PZP Tvrdonice

Average map for PE_12_14

kanal assign

1:20000

Kopal

30/05/2006

Map of Average Porosity of the 12-14th Sarmatian Sandy Complex

Amplitude map Porosity map

• New fault interpretation defined structural framework for studied reservoirs

• Existence of fluvial channel systems caused strong vertical and lateral variability of petrophysical properties in reservoirs ofearly Sarmatian horizons.

• Channels, facies with the best porosity and permeability determine priority migration for fluids.

• Horizon interpretation described morphology of complexes and closed contour for secure structure operating.

• 3D porosity model has brought specification of volume calculation.

• Geological model with incorporated fluvial facies minimizes riskwith introducing new production wells to reservoir.

Conclusions