CHARACTERISTICS AND CLASSIFICATION OF THE MIDDLEAND LOWER TRIASSIC CARBONATE ROCK RESERVOIRS IN THE CHISHUI AREA OF GUIZHOU PROVINCE

The characteristics of carbonate rock reseryoirs of Leikoupo Fm. and Jialingjiang Fm. of the Middle and Lower Triassic was mainly studied in the Chishui area,Guizhou.Thelower limit of the reservoirs was determined by prodiuction-coefficient-method.The reservoirs were classified into four levels based on the integrative characteristics of their lithology, physical property, pore texture and rese rvoir lower limit.Most of the reservoirs in thearea are located in the second and the third class,which are reservoirs of crack-pore type.