IEEE Geoscience and Remote Sensing Magazine - June 2020 - 125

JUNE 2020

IEEE GEOSCIENCE AND REMOTE SENSING MAGAZINE

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Cumulative Subsidence (mm)

45°45′0″ N

45°48′0″ N

45°51′0″ N

series analysis, it can be seen that
these deformation regions were in
N
the stable deformation process.
Nanyin Reservoir
Fortunately, the analysis showed
that there were fewer buildings in the
deformation zone, so the surface de3-3
3-1
formation was less harmful to urban
Nongzaodi Village
infrastructure and did not pose a threat
3-2
to human life. However, the large-scale
surface deformation in the Honggang
3-4
District occurred in the second, fourth,
and fifth oil production plants in the
Velocity
Daqing oil field. If the surface defor(mm/Year)
mation continues to develop, it is like< -68
-68 to -53
ly to cause damage to well equipment
-53 to -37
and underground pipelines, resulting
-37 to -22
in economic and property losses. The
-22 to -7
-7 to 7
Wilmington oil field in the United
7 to 22
States experienced a central subsidence
22 to 38
38 to 53
of 9 m during production, resulting in
53 to 68
a large area of pipeline fault and infra>68
structure damage.
124°30′0″ E
124°33′0″ E
124°36′0″ E
Figure 12 shows that ground uplift and subsidence also occurred in
the oil field development area near FIGURE 12. The average subsidence rate map of the Datong District.
Nongzaodi Village in the Datong District. The area with the fastest surface uplift rate was located
in the middle of the work area. Target points were selected
80
3-1
in the oil field operation area, and a time series analysis was
3-2
60
3-3
conducted to obtain Figure 13. Through the analysis, it was
40
3-4
found that all of the target points showed a stable uplift or
20
subsidence trend, with a maximum cumulative uplift value
0
of 60 mm and a cumulative subsidence value of -37 mm.
-20
Point 3-2 in the middle of the operation area had the fastest
-40
uplift rate compared with the other points, and the aver-60
age uplift rate was 45.81 mm/year. The displacement rate
increased steadily in the oil field exploitation area, and the
surface deformation in this area was mainly caused by oil
field exploitation.
It can be seen from Figure 14 that there were different
degrees of surface deformation in the area near Aobao
Dates
village, Zhaoyuan County, Daqing. The surface uplift in
the northern region of Aobao village was obvious, and
FIGURE 13. The cumulative displacement map of the
the rate of uplift was 63 mm/year. We performed a time
Datong District.
series analysis of the target points. Figure 15 shows that
the time series curves of points 4-1, 4-2, and 4-3 showed
injection stations were distributed around the oil field.
a consistent growth trend. Point 4-3 had the fastest upTherefore, the subsidence of this area was related to the
lift rate compared with the other target points, and the
large amount of groundwater pumped from the oil field.
cumulative displacement value was 72.9 mm. Figure 14
The most severely deformed area was located in the
also shows that there was an obvious subsidence pheSartu District. Figure 16 is a map of the annual average disnomenon in the southern part of Aobao village. We seplacement rate of the Sartu area. The deformation zone of
lected target point 4-4 in this area and got a subsidence
Sartu was symmetrically distributed around the Oil Field
rate of -49.7 mm/year. The cumulative subsidence value
History Exhibition Hall, and the maximum vertical uplift
was -58.9 mm. After investigation, we found that the
rate reached 72.61 mm/year. People can clearly see the exsubsidence area was located in the water pumping optent of the deformation as well as the severity and spatial
eration area of the oil field, and a large number of water
125

IEEE Geoscience and Remote Sensing Magazine - June 2020

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