Analysis of the Oil/Gas-bearing Possibility and Causes ofHeterogeneity of Oil and Gas Reservoirs

HONG Feng，JIANG Lin，HAO Jia-qing，FAN Yang，ZHENG Yong-ping

doi:10.11764/j.issn.1672-1926.2015.04.0608

Natural Gas Geoscience >

2015 , Vol. 26 >Issue 4: 608 - 615

DOI: https://doi.org/10.11764/j.issn.1672-1926.2015.04.0608

Analysis of the Oil/Gas-bearing Possibility and Causes ofHeterogeneity of Oil and Gas Reservoirs

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1.PetroChina Research Institute of Petroleum Exploration & Development,Beijing 100083,China；
2.Key Laboratory of Basin Structure and Hydrocarbon Accumulation,China National Petroleum Corporation,Beijing 100083,China

Received date: 2014-05-08

Revised date: 2014-11-30

Online published: 2015-04-10

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Abstract

Reservoir bed heterogeneity is a widespread feature.With the finding of lithologic hydrocarbon reservoirs in our country,the research of heterogeneity of reservoirs becomes particularly important,and finding out the relationship between reservoir heterogeneity and oil-gas possibility contributes to the discovery of more oil and gas enrichment regions in tight reservoirs in China.By comprehensively analyzing the geologic setting of oil and gas enrichment region in our country,we point out that the formation of heterogeneity of clastic rock reservoirs is mainly affected by deposition，diagenesis and tectonic reconstruction.The deposition and diagenesis is mainly due to the change of sedimentary facies and diagenetic evolution,and the tectonic reconstruction is mainly due to the imbalance of the late reservoir reconstruction,leading to the development of heterogeneity in the same reservoir bed.Physical simulation experiments of the oil/gas-bearing possibility of reservoir with different physical properties showed that the heterogeneity of clastic rock reservoir affects its oil/gas-bearing possibility,and the sand body with relatively higher permeability and porosity is beneficial to oil accumulation,but not all the gas will charge into the sand body with relatively higher permeability and porosity,low permeability sandstone reservoir can still have high gas saturation,this is mainly due to the natural gas filling difference in different pore-throat sand body.

Key words： Reservoir bed; Heterogeneity; Oil/gas-bearing possibility; Permeability difference; Physical simulation

Cite this article

HONG Feng，JIANG Lin，HAO Jia-qing，FAN Yang，ZHENG Yong-ping . Analysis of the Oil/Gas-bearing Possibility and Causes ofHeterogeneity of Oil and Gas Reservoirs[J]. Natural Gas Geoscience, 2015 , 26(4) : 608 -615 . DOI: 10.11764/j.issn.1672-1926.2015.04.0608

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