CHARACTERISTICS OF FRACTURES AND THEIR HYDROCARBON RESERVOIR MEANINGS FOR THE ARCHEAN OUTCROP IN LAIWU AREA, SHANDONG PROVINCE

Metamorphic rock, whose reservoir space is dominated by fractures, is often the reservoir rock for bedrock buried-hill oil pools. The scale and distributive rules of fractures in reservoirs are difficult problems to petroleum geological research, and the study on surface outcrop will be helpful to the understanding of underground reservoirs. In this paper, the outcrop fractures which having the same horizon, structural background and lithology with buried-hill oil pools were analysed qualitatively and quantitatively, and the fracture description parameters obtained took a directive role in revealing the distribution of reservoir space in the bedrock buried-hill fractures of Shengli oilfield.