The Development Mechanism of Mesozoic Volcanic Reservoirs#br#
in Guxi Area

doi:10.11885/j.issn.1674-5086.2015.08.28.03

Abstract

Abstract:

The Mesozoic volcanic reservoirs are discovered in Gunan 2 Block and Ken 93 Block in Guxi area，which indicates
the huge potential for exploration of the Mesozoic volcanic rocks in this area. Given that the physical properties of Mesozoic
volcanic reservoirs vary fast in vertical and horizontal direction，we clarified the physical characteristics of different lithology
by observing under microscope 200 slices from 28 wells and did statistical analysis of 87 reservoir property samples，and found
out that the reservoir is with middle to low porosity，and low to extra low permeability on the whole. The evolution process of
reservoir pore and the law of physical characteristics change are also summarized. The controlling factors of reservoirs，such
as condensation-consolidation，hydrothermal filling，structural effect/ weathering，burial and dissolution，are clarified. Finally，
the development model of volcanic reservoirs under the control of lithology，unconformity and fractures are established，
combined with the analysis of oil and gas migration process，and the special model of volcanic reservoirs is set up in this region.

Key words: Mesozoic, volcanic rocks, controlling factors of reservoir, development model, Guxi area

CLC Number:

TE122

GUO Feng*, CUI Dian. The Development Mechanism of Mesozoic Volcanic Reservoirs#br# in Guxi Area[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2015.08.28.03.

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The Development Mechanism of Mesozoic Volcanic Reservoirs#br# in Guxi Area

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