With the rapid development of the shale gas industry in China

the shale gas geological evaluation experimental testing technology has been continuously improved.At present

a series of technology

mainly including core pretreatment

mineral composition

geochemistry

pore structure

physical properties

mechanical properties and gas content

has been formed in ChinaCompared with traditional sandstone

conglomerate

siltstone and other clastic reservoirs

shale reservoir

as a fine-grained deposit

has typical characteristics of low porosity and ultra-low permeability

and the natural fractures and micro nano pores develop.Therefore

it brings four challenges to the experimental technology of shale gas geological evaluation:the sedimentary microfacies are changeable

the diagenetic evolution is complex

the pore structure characterization is difficult and the fluid flow mechanism is diverse.In order to further speed up the progress of shale gas exploration and development in China and solve the bottleneck and problems in the actual production process

four directions are put forward for the experimental testing technology of shale gas geological evaluation

that is

① the fine description of reservoir urgently needs to be developed from static characterization to dynamic evolution

②the researches of reservoir pore and fluid occurrence mode in pore develop into simulation experiment under real geological conditions

③the porosity characterization develops from single scale to macro-micro multi-scale integration

④experimental data mining based on big data develops into capacity evaluation and prediction.All these are expected to provide reference for the development of the shale gas exploration and development technology and theory in China.