Skip to main content

Science – Society – Technology

Table 1 Wells drilled in the Fang geothermal area

From: Geologic framework of the Fang Hot Springs area with emphasis on structure, hydrology, and geothermal development, Chiang Mai Province, northern Thailand

Well name

Depth (m)

Tflow

Tmax

Flow (l s−1)

Open hole depth (m)

Open hole diameter (cm)

Surface csg. diam. (cm)/depth (m)

Type csg. OD/ID (cm)

Lower csg. Diam. (cm)/depth (m)

Type csg. OD/ID (cm)

Well head press. (bars)

Source

Remarks

WGS84 easting

WGS84 northing

Date drilled

FTGE-1

29 (br), 30 (c)

 

100 (c), 110 (br)

 

30

      

c, wt, br

110° at 25 m, intermittant shooting flow 30-m high, well collapsed (br)

16.325*

7.813*

5/1982

FTGE-2

80

 

37

   

20.32/13.75

    

c, wt, br

 

16.425*

7.500*

6/1982

FTGE-3

94

98

111.8

1.0–2.0

80

17.145

20.32/14

21.91/20.247

   

c, wt, br

111.8° at bottom, flow includes small amount of steam (br)

16.309

7.754

8/1982

FTGE-4

           

c, wt, br

Eruption of water occurred before casing set, well collapsed (br)

16.235*

7.645*

1982 (?)

FTGE-5

19.6

105

115

2.0–4.0

13.1

17.145

20.32/6.5

21.91/20.247

   

c, wt, br

Max temp after closing well 20 min (br), presently marked by 1.5 m brick outline (ki)

16.236

7.654

Before 1986

FTGE-6

85.4

 

122.3 (c),

93.7 (wt)

None

56

14.287

20.32/6.75

21.91/21.156

15.24/29.4

16.61/15.64

 

c, wt

“Dry hole”(wt). Not located in 2015. Temperature log (Fig. 8)

16.340*

7.835*

Before 1986

FTGE-7

52.7

105

130.2 (br)

118 (wt)

3.80

35

14.287

20.32/7

21.91/21.156

15.24/17.7

16.61/15.64

 

c, wt

Not used for power. Shut in for 30 min. intervals, and then geysers 35 m high (ki)

16.061

7.643

Before 1986

FTGE-8

120

105

130 (c)

122 (wt)

0.20

96

14.287

20.32/7.2

21.91/21.156

15.24/24

16.61/15.64

 

c, wt

Temperature log (Fig. 8)

16.142*

7.515*

Before 1986

FTGE-9

64

105

128.5 (c)

123 (wt)

0.60

34

14.287

20.32/11.5

21.91/21.156

15.24/30

16.83/15.48

 

c, wt

 

16.073

7.625

Before 1986

FTGE-10

103.3

 

118.4 (c) 115 (wt)

None

79.3

14.287

20.32/2

21.91/21.156

15.24/24

16.83/15.49

 

c, wt

location uncertain, said to be up on hill north of large tree above FTGE-15 (ki). Temperature log (Fig. 8)

  

Before 1986

FTGE-11

58.8

105

125 (c)

118 (wt)

0.50

40.8

14.287

20.32/7

21.91/21.157

15.24/18

16.83/15.50

 

c, wt

Intermediate flow

16.286

7.704

Before 1986

FTGE-12

43.7

105

128.1 (c)

115 (wt)

4.01

37.7

14.287

20.32/6.5

21.91/21.158

15.24/6

16.83/15.51

 

c, wt

Steady flow

16.218

7.624

Before 1986

FTGE-13

90

105

115.8

1.00

72

14.287

20.32/6

21.91/21.159

15.24/18

16.83/15.52

 

c,

Intermediate flow

16.253

7.667

Before 1986

FTGE-14*

73.2 (c)

92 (ki)

110

131.6

7.94

64.2

14.287

20.32/6

21.91/21.160

15.24/9

16.83/15.53

1.5

c,

Steady flow (c), said to be 92 m deep with hot water inflow at 18 m/38 m/66 m (ki). Also called the “Khun Theptorn well”

16.081

7.595

1985–86

FTGE-15*

60.5 (c),

160 (ki)

121

130.6

13.97

52.5

14.287

20.32/6

21.91/21.161

15.24/8

16.83/15.54

1.5

c,

Said to be 160 m deep with hot water inflow at 60 m (ki). Also named “Khun Wichian well”

16.058

7.678

1985–86

FTGE-16

~100 (ki)

           

No information

16.205

7.910

1986

FX-1

500

 

108

None

       

tk

Location unknown

  

1995 (?)

FX-2

500

125

        

1.5

tk

Fracture zone at 270 produces 6.94 l/s of 125 °C

16.177

7.404

1995 (?)

FX-3

500

 

113

None

       

tk

Location unknown

  

1995 (?)

FX-4

500

 

130

        

tk

Fracture zones at 268, 337, and 417 m. (tk) indicates a total flow of 10 l/s, but inclear if this is a total of FTX-2 and FTX-4

16.251

7.658

1995 (?)

BH-3

18

100

110

1.00

14

7.302

7.62/4

10.16/9.012

   

c, wt, br

Steady flow (wt)

16.213*

7.798*

6/1984

BH-4

34.7

100

124

0.50

27.7

7.302

10.16/7

11.43/10.22

  

0.85

c, wt, br

Steady flow (wt)

16.038*

7.765*

6/1984

BH-8

25

104

110

1.50

12.2

7.302

8.89/12.8

10.16/9.012

   

c, wt, br

Steady flow (wt)

16.285*

7.846*

6/1984

BH-11

   

1.00

       

wt

Steady flow (wt), location unknown

  

6/1984

2 wells

           

ki

2 wells, 5 m apart near sign (Ing-Doi camp)

16.130

7.956

?

Bo Luang Camp

           

ki

This might be BH-3 or BH-8

16.213

7.798

?

  1. (br) Ratanasthien et al. (1985), (c) Chuaviroj (1987). (wt)Wanakasem and Takabut (1986). (tk) Korjedee (2000). (ki) Khun Inton, EGAT staff at Fang, personal communication, 2015
  2. note that Chuaviroj (1987) reports higher maximum temperature than does Wanakasem and Takabut (1986)
  3. * Asterisk on UTM location indicates it has been scaled from scans of maps by Coothungkul and Chinapongsanond (1985) and Wanakasem and Takabut (1986)