Attention has not been paid for a long time to petroleum exploration in the intermediate and shallow terrestrial clastic rock layers in the Chishui area, Guizhou Province.

The Chishui EW strike structure within basement extends eastward to Lianyuan in Hunan province, which extends probably down to middle-lower crust.

Fluid inclusions both in calcite crack fillings and in late-stage gypsum from the carbonate reservoir in the Chishui gas field, Guizhou Province have been studied.