摘要
Devonian reef is developed in the Guizhong Depression, and drilling data of well GZ1 support the opinion that high quality biolithite and dolomite reservoirs do exist in the Guizhong Depression. It is suggested that the reservoir types can be classified into fissure type, fissure pore type and pore type. The depositional environment, diagenesis and tectoclase controlled the development of the beneficial reservoir. Nowadays reservoir space is mainly made up of burial emposieus and remaining pores, fissures and solution hollows. A study of diagenesis and geochemistry indicates that the porosity evolution was related to the oil accumulation, and that two stages of processes of oil reservoir formation might have occurred.