Nanchuan Shale Gas Field is China's first commercially developed shale gas field dominated by normal pressure shale gas. In order to evaluate the exploration and development prospects of this type of shale gas

the exploration and development history of this area has been reviewed

the geological characteristics of the gas field are analyzed from the aspects such as structure

deposition

reservoir

preservation

in-situ stress

gas reservoir and production characteristics

and finally

the key technologies of exploration and development are summarized. The results show that: ①Nanchuan Shale Gas Field has experienced multi-stage tectonic movement. Its shale gas geological conditions are complex

and there are three structural belts: Pingqiao

Dongsheng and Yangchungou. The characteristics of deposition

reservoir

preservation and in-situ stress are quite different in different tectonic zones

but the shale gas reservoirs are generally with the type of elastic gas drive

mid-deep to deep layer

normal temperature

high pressure to normal pressure and dry gas. ②As for the production

its has the characteristics of high initial test output

high liquid volume

fast decline

medium elastic yield and relatively low single well's EUR. ③Six key technologies of exploration and development have been formed

which are

“sweet spot” target evaluation

reservoir characterization

in-situ stress field prediction

geology-engineering integration design of horizontal wells

development technology policy and low-cost engineering technology. ④The discovery of Nanchuan shale gas field brings four inspiration: firstly

firming exploration confidence is the foundation of exploration breakthrough; secondly

deepening basic geological research is the core of breakthrough; thirdly

innovative technological practice is the key to benefit development; fourthly

the implementation of the integration model is the guarantee of improving quality and efficiency.