Control of high r esolution sequence str atigr aphy on microfacies and reservoir s: A case from the upper Ma 5 member in Tong 5 wellblock, Jingbian Gas Field

LEI Bianjun, ZHANG Ji,WANG Caili,WANG Xiaorong, LI Shilin, LIU Bin

doi:10.3969/j.issn.1673-8926.2008.01.001

2008 , Vol. 20 >Issue 1: 1 - 7

DOI: https://doi.org/10.3969/j.issn.1673-8926.2008.01.001

Control of high r esolution sequence str atigr aphy on microfacies and reservoir s: A case from the upper Ma 5 member in Tong 5 wellblock, Jingbian Gas Field

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1. Southwest Petroleum University, Chengdu 610500, China;2. Research Institute of Petroleum Exploration and Development, Changqing Oilfield Company, Xi’an 710021, China

Online published: 2008-03-15

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Abstract

The control of high resolution sequence stratigraphy on the vertical distribution of sedimentary microfacies and reservoirs in upperMa 5 member of Majiagou Formation in Tong 5 well block of Jianbian Gas Field in Ordos Basin is studied. Ma 5_{1- 4} submember is an asymmetric long-term base level cycle which can be divided into five middle-term base level cycles and more than 26 short-termbase level cycles. The study result shows that the sedimentarymicrofacies and reservoirs of Ma 5 member of Majiagou Formation in Tong 5 wellblock of Jingbian Gas Field are probably dominated by long-term base level cycle. The control action of middle-term and short-term base level cycles on the distribution of sedimentary microfacies and reservoirs is distinguished. Middle-term and short-term base level cycles control the vertical subtle change of sedimentary microfacies of carbonate tidal flat in continental sea tableland, and control the vertical distribution of vugular dolomite reservoir ofweathered crust. It is feasible to divide the cycles ofMa 5_{1- 4} by high resolution sequence stratigraphy. The achievement of this research can be applied to the analogous reservoir studies in other areas.

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LEI Bianjun, ZHANG Ji,WANG Caili,WANG Xiaorong, LI Shilin, LIU Bin . Control of high r esolution sequence str atigr aphy on microfacies and reservoir s: A case from the upper Ma 5 member in Tong 5 wellblock, Jingbian Gas Field[J]. Lithologic Reservoirs, 2008 , 20(1) : 1 -7 . DOI: 10.3969/j.issn.1673-8926.2008.01.001

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