Abstract:

The reservoir investigation of carbonate buried hill is characterized by its complexity and difficulty in the fieId of petroleum geology. Based on the thoroughly observation of core datum and thin section,the petrological characteristics of the study area was described,and thus five storage spaces were proposed：corroded pore，corroded cavity,cave,weathering fissure and structural fissure．The five storage spaces formed five reservoir types: weathering fissure, fissure-cavity, corroded cavity， structural fissure and cavern，in which the first three types are the most important ones．Combined with the drilling，mud
logging，well logging and well test data，the five reservoir types were analyzed and the carbonate buried hill reservoir was evaIuated to be divided into three types. The result indicates that the carbonate reservoirs distribute as stripes in the direction from northeast to southwest．

Key words: carbonate reservoir, characteristics, reservoir distribution, Chezhen zone, the Shengli oil field