Gas Breakthrough Patterns and Modification Technology in Yaha Gas-condensate Reservoir

MIAO Ji-jun，WANG Yong-hong，LI Xu，SUN Tai-rong

doi:10.11764/j.issn.1672-1926.2014.01.124

Natural Gas Geoscience >

2014 , Vol. 25 >Issue 1: 124 - 129

DOI: https://doi.org/10.11764/j.issn.1672-1926.2014.01.124

Gas Breakthrough Patterns and Modification Technology in Yaha Gas-condensate Reservoir

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1.CNPCUSA Corporation,Beijing 100007,China;
2.Tarim Oilfield Company,PetroChina,Korla 841000,China

Received date: 2013-06-01

Revised date: 2013-12-16

Online published: 2014-01-10

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Abstract

Yaha gas-condensate reservoir has been developed for eleven years by reinjecting dry gas to keep the formation pressure partially,each development indexes are better than those of ODP expected,it has good development effect.But the gas breakthrough wells increase gradually,thus the purpose of development modification is to limit gas breakthrough and level off the GCR.Under the discovery that the mobility of injection gas in formation is controlled by component gradient for YaHa gas-condensate reservoir,the technologies of production log,tracer monitoring,and well interventions was conducted to probe the patterns of gas breakthrough.Three gas breakthrough patterns was discovered based on current injector and producer patterns,namely injection in lower part and production in higher part,injection in higher part and production in lower part,and production and injector separated by structural high.Based on the discovery,gas breakthrough limitation method test was conducted on one site.After isolating the upper perforated layer or adjusting the producer and the injector,GCR declined obviously and kept smooth for long time.

Key words： Gas-condensate reservoir; Gas reinjection; Gas breakthrough; Gravitational difference

Cite this article

MIAO Ji-jun，WANG Yong-hong，LI Xu，SUN Tai-rong . Gas Breakthrough Patterns and Modification Technology in Yaha Gas-condensate Reservoir[J]. Natural Gas Geoscience, 2014 , 25(1) : 124 -129 . DOI: 10.11764/j.issn.1672-1926.2014.01.124

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