Formation of fractures in carbonate rocks by pad acid fracturing with different states of carbon dioxide
GUO Jianchun,ZHAN Li,GOU Bo,ZHANG Ran,LIU Chao,LI Xiao,REN Jichuan
Table 2.
In-situ stress characteristics of Ma 5
1
reservoirs.
Well
Member
Vertical depth/m
In-situ stress gradient/(MPa•m
-1
)
σ
H
σ
h
σ
v
A
Ma
5
1
3 721-3 733
0.027 9
0.024 1
0.025 3
B
Ma
5
1
3 597-3 606
0.028 2
0.023 5
0.025 4
C
Ma
5
1
3 339-3 347
0.028 8
0.023 9
0.025 5