The seismic detection of gas bearing for Xujiahe Formation in the middle of Sichuan Basin

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  • Langfang Branch,Research Institute of Petroleum Exploration & Development,PetroChina,Langfang 065007,China

Received date: 2015-12-30

  Revised date: 2016-07-22

  Online published: 2019-09-06

Abstract

The tight sand reservoir in Xujiahe Formation of Upper Triassic in Sichuan Basin contains huge resources of natural gas,it is one of the most important exploration and development layer system.Practice shows that the Xujiahe Formation gas reservoir is very complex:Thin reservoirs,strong heterogeneity,complex  distribution of gas and water,so it seriously affects the Xujiahe gas reservoir exploration and development benefits.How to accurately identification the gas and water and improve the prediction accuracy of gas enrichment zone is essential to the development of the gas reservoir.Based on the analysis of reservoir rock physics and forward modeling,this study summarizes the AVO response characteristics of gas and water layer,establishes a new method of near stack section and far stack section comparative analysis and forms the key method of Main amplitude and Main frequency technique.The methods are used to detect gas and water and forecast gas-rich region in many blocks at Anyue-Gaoshiti areas in the middle of Sichuan Basin,and the reliability of the prediction results has been confirmed by a large number of new drilling wells.

Cite this article

Li Xin-yu, Ouyang Yong-lin, Bao Shi-hai, Zeng Qing-cai, Chen Sheng, Huang Jia-qiang, Zhang Lian-qun, Li Xuan . The seismic detection of gas bearing for Xujiahe Formation in the middle of Sichuan Basin[J]. Natural Gas Geoscience, 2016 , 27(12) : 2207 -2215 . DOI: 10.11764/j.issn.1672-1926.2016.12.2207

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