Sedimentary characteristics and controlling factors of gas condensate reservoir of Ying Ⅳ formation in Longfengshan Gasfield,Songliao Basin,China

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  • Research Institute of Petroleum Exploration & Production,SINOPEC,Beijing 100083,China

Received date: 2016-12-02

  Revised date: 2017-02-27

  Online published: 2017-04-10

Abstract

The sedimentary environment in Longfengshan area is very complicated,the comparison of reservoir and the research of the regularity of high production are very difficult.In order to define the sedimentary characteristics and controlling factors of reservoir development in this area,based on regional sedimentary background,combined with the core observation and data analysis of the well logging,we used sedimentary facies analysis of unified method of macro geological understanding and micro geological evidence and found this region mainly developed fan delta front sedimentary system.The favorable sedimentary microfacies is the channel.Through analysis of the distribution characteristics of the sedimentary facies,the lower part of Ying Ⅳ formation developed channel with vertical superimposition at multiple depositional stages.The upper part of Yingcheng Ⅳ formation developed multiperiod distributary channel of sand-mud interbed.By the experimental analysis of fluid PVT,combined with the testing data,Longfengshan Gasfield is high oil-bearing property and has nearly saturated condensate gas reservoir.The distribution of effective reservoir is controlled by sedimentary factor and structure factor.Finally,the distribution range of gas is determined.According to the favorable area and producing reserves,well location deployment was carried out.So the researches provide a technical support for the productivity construction.Based on the analysis of the sedimentary characteristics and the influencing factors of gas reservoir distribution,the drilling success rate and the capacity compliance rate are 100%.

Cite this article

Zhang Guang-quan,Hu Xiang-yang,Sun Bing,Jia Yue-wei . Sedimentary characteristics and controlling factors of gas condensate reservoir of Ying Ⅳ formation in Longfengshan Gasfield,Songliao Basin,China[J]. Natural Gas Geoscience, 2017 , 28(4) : 502 -513 . DOI: 10.11764/j.issn.1672-1926.2017.02.014

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