歧口凹陷歧南斜坡深部储层特征及综合评价

doi:10.3969/j.issn.1673-8926.2013.06.009

Lithologic Reservoirs ›› 2013, Vol. 25 ›› Issue (6): 46-52.doi: 10.3969/j.issn.1673-8926.2013.06.009

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Characteristics and comprehensive evaluation of deep reservoirs in Qinan ramp, Qikou Sag

ZHANG Jing¹， LI Shuangwen¹， LIU Huaqing¹， YUAN Shuqin²， NIU Haiqing¹， LIU Zhigang³

1. PetroChina Research Institute of Petroleum Exploration & Development-Northwest， Lanzhou 730020， China； 2. Research Institute of Exploration and Development， PetroChina Dagang Oilfield Company， Tianjin 300280， China； 3. Research Institute of Exploration and Development， PetroChina Yumen Oilfield Company， Jiuquan 735019， China

Online:2013-11-26 Published:2013-11-26

Abstract

Abstract:

By analyzing thin sections, scanning electronic microscope and physical properties，this paper studied the characteristics and influencing factors of deep reservoirs in Qinan ramp of Qikou Sag. The result shows that the third member of Shahejie Formation belongs to low porosity and ultra-low permeability reservoir, there developed three secondary pore zones in the vertical direction. The development of deep secondary pores is dominated by sedimentary facies belt, dissolution and anomalous pressure, and the occurrence of fractures can reform the deep reservoir. According to the physical properties, sandstone thickness and pressure coefficient, the reservoir in the study area can be divided into four types. The reservoirs of type Ⅰ and Ⅱ have better physical properties and they are the main reservoirs to increase production in the future.

Key words: dual-medium, reserve parameters, conventional log, lithology identification, fracture identification

ZHANG Jing， LI Shuangwen， LIU Huaqing， YUAN Shuqin， NIU Haiqing， LIU Zhigang. Characteristics and comprehensive evaluation of deep reservoirs in Qinan ramp, Qikou Sag[J].Lithologic Reservoirs, 2013, 25(6): 46-52.

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