Open AccessStudy on the characteristics of gas-generating reservoir-caprock assemblages and gas traps in coal measures in Fuxin Basin
Author(s) -
Kailin Song,
Yao Lei
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/558/2/022002
Subject(s) - siltstone , caprock , geology , structural basin , lithology , source rock , geochemistry , geomorphology , petrology , facies
As an unconventional natural gas reservoir, sand body gas has unique characteristics. The paper takes Fuxin Basin as the research object and carries out systematic research on the characteristics of sand gas generation reservoir cap combination. The main controlling factors are analyzed for the trap characteristics of the sand gas reservoir in the main formation. The results show that there are two types of gas source rocks in Fuxin Basin, namely, dispersed organic matter and concentrated organic matter reservoirs, which are mainly composed of two sets of strata. The first set is the lower channel sand bodies of the Fuxin Formation, and the second set is the third member of Shahejie Formation, The second alluvial fan-fan delta sand body. The caprock of Fuxin Formation is mudstone and siltstone in the middle and upper part of this group. The cover layer of Shahai Formation is mudstone and siltstone in the fourth member of Shahe Formation, with dense and uniform development in the whole area and stable sedimentation. Sand gas traps in Fuxin Basin are mainly controlled by two types of traps: structural traps and lithologic traps.