Lithologic Reservoirs ›› 2012, Vol. 24 ›› Issue (3): 51-55.doi: 10.3969/j.issn.1673-8926.2012.03.010

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Petrography characteristics and main controlling factors of secondary pores in Carboniferous volcanic reservoir in Dixi area, Junggar Basin

LIU Jiangyu1，XIA ihua1，RAN Qiquan2，ZHOU Hui1，YUAN Dan1   

  1. 1. State Key Laboratory of Oil and Gas Reservior Geology and Exploitation， Southwest Petroleum University， Chengdu 610500， China； 2. Research Institute of Petroleum Exploration and Development， Beijing 100083， China
  • Online:2012-06-20 Published:2012-06-20

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Abstract:

The development of secondary pores in volcanic reservoir controls the oil and gas accumulation, and has an essential contribution to reservoir. Based on core data, and observation of thin sections and casting slices, combined with the logging data, it was found that different types of secondary pores developed in volcanic reservoir in Dixi area, including phenocryst dissolved pores, matrix dissolved pores, amygdale dissolved pores, intragranular dissolved pores, metasomatic and alterative pseudo-amygdale dissolved pores, structural fractures and dissolved fractures. The secondary pores and fractures have some internal connection in the evolution, and their forming is a complex geological process, principally controlled by lithology, tectonism and dissolution. The lithology is the material basis and prerequisite for the development of secondary pores, dissolution and fracture play a major role in the formation of secondary pores. The study on the characteristics of secondary pores and main controlling factors has a great significance to effective reservoir evaluation and prediction.

Key words: data-domain data fitting, image-domain correlation, objective function, multi-scale velocity, velocity estimation

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