Lithologic Reservoirs >

2013 , Vol. 25 >Issue 5: 59 - 64

DOI: https://doi.org/10.3969/j.issn.1673-8926.2013.05.010

Oil sand reservoir characteristics and diagenesis in Houba area, northwestern Sichuan

  • WANG Tao
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  • 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation， Southwest Petroleum University，Chengdu 610500， China； 2. College of Resource and Environment， Southwest Petroleum University， Chengdu 610500， China； 3. Research Institute of Exploration and Development， CNOOC Tianjin Company， Tianjin 300450， China； 4. Geological Exploration and Development Research Institute， Chuanqing Drilling Exploration Engineering， PetroChina， Chengdu 610051， China

Online published: 2013-09-26

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Abstract

Oil sand of Middle Jurassic Shaximiao Formation in Houba area in the frontier Longmen Mountain is one of the most typically important unconventional resources. Based on crop and core observation, this paper discussed the reservoir characteristics of oil sand and its diagenesis in Houba area. The result shows that the reservoir sandstones are mainly medium-coarse grained sublitharenite and litharenite, the main pore types are residual intergranular pores and intergranular dissolved pores, and fractures are common. The sandstone reservoir has the characteristics of medium high porosity and medium permeability. Diagenesis includes compaction, cementation and dissolution, and dissolution and chlorite cementation are constructive for the preservation of pores. Dissolution generally developed within grain and boundary of unstable grain, and formed great number of secondary dissolved pores. Chlorite cementation can improve the rock compaction resistance. Compaction, carbonate cementation and quartz overgrowth cause damages to the reservoir pores.

Key words： bottomwater reservoir; water cut; numerical simulation; Box-Behnken experiment design

Cite this article

WANG Tao . Oil sand reservoir characteristics and diagenesis in Houba area, northwestern Sichuan[J]. Lithologic Reservoirs, 2013 , 25(5) : 59 -64 . DOI: 10.3969/j.issn.1673-8926.2013.05.010

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