The Geological Characteristics and Hydrocarbon Accumulation Model
of the Lower Paleozoic Clastic Play，Oman Basin，Middle East

doi:10.11885/j.issn.1674-5086.2013.11.17.04

Abstract

Abstract:

The lower Paleozoic clastic play is the most important gas play in Oman Basin，the sandstone reservoirs of Cambrian-
Silurian Haima Group and its overlying thick mudstone being the basic reservoir-caprock combination，Huqf Group is the most
important source rock. This paper analyzes the petroleum geological conditions，hydrocarbon accumulation models，exploration
potential and risks. In the center of Ghaba sub Basin，Huqf source rock only generates gas today. The pores of early traps were
mostly filled with the pyrobitumens formed by high formation temperatures. Attention should be paid to the traps formed after
Cretaceous in exploration. The central palo-uplift of Ghaba Basin was a barrier for lateral migration，so the traps in east flank
have risk of hydrocarbon charge. In the center of south Oman Sub Basin，it′s difficult for hydrocarbon to migrate vertically
through the thick Ara salt to the upper Haima Group，so most of the traps lack potential. In the east flank of south Oman Basin，
for the continued dissolution of Ara salt，which destroyed the seal of former oil pools，the oil released from them could recharge
new traps of Haima Group，so there are chances for oil exploration.

Key words: lower Paleozoic play, Huqf source rock, reservoir of Haima Group, hydrocarbon accumulation, Oman Basin

Li Haowu1, Tong Xiaoguang2, Wang Jianjun1, Wen Zhixin1, Zhang Yongjun3. The Geological Characteristics and Hydrocarbon Accumulation Model
of the Lower Paleozoic Clastic Play，Oman Basin，Middle East[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2013.11.17.04.

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