关键词: 济阳拗陷, 上古生界, 煤成气, 储层, 非均质性

Abstract:

Neopaleozoic is an important coal-gas reservoir of Jiyang Depression. The reservoir heterogeneity is an important
factor to the migration of underground coal-gas，and is also the basis for understanding coal-gas，so achievements of researches
on the reservoir heterogeneity have a direct impact on recognizing the distribution law of coal-gas in reservoirs and on the
development effect. According to the information available，and by using statistical methods and the Lorenz curve methods，
we studied the coal-gas reservoirs heterogeneity from the plane，intralayer，interlayer heterogeneity in Paleozoic Jiyang Depression，
respectively，and evaluated the results. The results show that sand permeability of Gubei Area in Zhanhua Sag of
Jiyang Depression decreases from west to east and from north to south. Wells with severe interlayer heterogeneity are Degu
2，Wanggu 1，Gubeigu 1，Gubeigu 2，Gubeigu 3 etc. And wells with severe intralayer heterogeneity are Degu 2，Gubeigu1，
Gubeigu 2 etc. Such results have guiding significance to the coal-gas exploration in Jiyang Depression.

Key words: Jiyang Depression, Neopaleozoic, coal-gas, reservoir, heterogeneity