In order to evaluate the CBM exploration potential of Hongguo Block

the basic geological conditions for the enrichment of CBM reservoirs were analyzed from the aspects such as stratigraphic distribution

coal quality

physical characteristics

gas-bearing capacity and preservation conditions by the data of coal drilling and CBM wells. And then the resource potential of CBM was preliminarily accessed. Finally

the favorable gas-rich areas were further optimized. Results show that coal bed in Hongguo Block has the characteristics of moderate burial depth（500~1 200 m）

large accumulated thickness（10.3~25.8 m）

moderate thermal maturity（0.9 %~2.0 %） and high gas content（10.8~26.3 m

3

/t）

with super

ior geological conditions of CBM accumulation. By the comprehensive evaluation

the favorable CBM area is about 260 km

2

and the amount of resource is about 422×10

8

m

3

. The most favorable area type I

1

is located in the east of Panguan syncline

with high thermal evolution degree

developed cleavage and fissure

high pressure coefficient

and superior preservation conditions

which is the primary target area for the next CBM exploration.