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Geoscience ›› 2008, Vol. 22 ›› Issue (5): 824-828.

• Engineering Geology and Environmental Geology • Previous Articles     Next Articles

The Research of Deliverability Well Test Interpretation of  Yaha Condensate Gas Reservoir,Xinjiang

  

  1. 1Research Institute of Petroleum Exploration and Development,Petrochina,Beijing100083,China;
    2Research Institute of Petroleum Exploration and Development,Tarim Oilfield Company,Petrochina,Kuala,Xinjiang841000,China;
    3China Petroleum Technical Development Company,Beijing100009,China
  • Received:2008-03-04 Revised:2008-08-24 Online:2008-10-20 Published:2009-11-12

Abstract:

Yaha condensate gas reservoir of Xinjiang is the biggest gas reservoir explored in our country, and it has developed very well since it was put into production. Yaha condensate gas reservoir is in the period of complete retrograde condensation now, when the production is affected greatly, and the contradiction in the course of production has also been exposed gradually. This paper used the way of modern well test, and the well test interpretation software of Saphir of KAPPA corporation to analyse 9 wells’ build-up testings of pressure, deliverability testing data of the Yaha condensate gas,the rules of deliverability and the effect of retrograde condensation on deliverability. We draw the conclusions as follows: (1)when the permeability in the reservoir is higher than 20×10-3μm2 and the tested production is more than 250 thousand cubic meters,negative slope appears; (2)because of retrograde condensation effect, most of the well test models are the radial composite models. These conclusions will play an important role on understanding the gas field production performance,enhancing the research of dynamic detection technology,and gaining the good gas injection and remarkable economic benefit.

Key words: condensate gas reservoir, retrograde condensation, well test interpretation, deliverability, build-up of pressure

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