THE CHARACTERISTICS OF LOW-PERMEABILITY RESERVIOR OF Es2 UPPER 4-7 BODY GROUP IN THE SOUTHERN AREA OF PUCHENG OILFIELD

doi:10.3863/j.issn.1674-5086.2009.05.015

西南石油大学学报(自然科学版) ›› 2009, Vol. 31 ›› Issue (5): 73-78.DOI: 10.3863/j.issn.1674-5086.2009.05.015

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THE CHARACTERISTICS OF LOW-PERMEABILITY RESERVIOR OF Es2 UPPER 4-7 BODY GROUP IN THE SOUTHERN AREA OF PUCHENG OILFIELD

XIAO Shu-ming^1，2ZHONG Jian-hua^1，3WANG Yong⁴MA Feng⁵

1.Guangzhou Institute of Geochemistry，Chinese Academy of Sciences，Guangzhou Guangdong 510640，China；2.Xianhe Production Plant，Shengli Oilfield Company Ltd.，SINOPEC，Dongying Shandong 257342，China；3.College of Geo-resources and Information，China University of Petroleum，Dongying Shandong 257061，China；4.Geological Scientific Research Institute，Shengli Oilfield Company Ltd.，Dongying Shandong 257015，China；5.Research Institute of Petroleum Exploration and Development，CNPC，Haidian Beijing 100083，China

Received:1900-01-01 Revised:1900-01-01 Online:2009-10-20 Published:2009-10-20

Abstract

Abstract:

The characteristics of Es2 upper 4-7 body group reservior in the southern area of Pucheng Oilfield are investigated with the data of thin section analysis，SEM，porosity and permeability analysis，core，log and geologic model.It is recognized that the pore space of reservoir mainly includes the primary residual intergranular pores and secondary intergranular pores.Displacement and saturation median point pressure is high，pore throat radius is small，pores throat sorting is poor and skewness is fine.The quality of reservoir is affected by sedimentary microfacies and diagenesis.The sedimentation is a basic factor generating low-permeability reservoirs，and the strong compaction and cementation are the key factors forming low-porosity and low-permeability reservoirs.According to the petrophysical properties of reservoir and pore structure parameters，Es2 upper 4-7 body group reservoir is classified into four types，the type Ⅰ and type Ⅱ are mainly distributed in the underwater channel and estuarine far-bar sandstone.

Key words: geologic model, reservoir, sedimentary microfacies, intergranular pore, diagenesis

CLC Number:

TE122.2

XIAO Shu-ming;ZHONG Jian-hua;WANG Yong MA Feng . THE CHARACTERISTICS OF LOW-PERMEABILITY RESERVIOR OF Es2 UPPER 4-7 BODY GROUP IN THE SOUTHERN AREA OF PUCHENG OILFIELD[J]. 西南石油大学学报(自然科学版), 2009, 31(5): 73-78.

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THE CHARACTERISTICS OF LOW-PERMEABILITY RESERVIOR OF Es2 UPPER 4-7 BODY GROUP IN THE SOUTHERN AREA OF PUCHENG OILFIELD

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