Reanalysis of Reservoir Accumulation Mechanism in Nanbaxian Oil-gas Field
Received date: 2011-11-19
Revised date: 2012-08-10
Online published: 2012-10-10
The hydrocarbon concentration of Nanbaxian oil-gas field which is complex fault block reservoirs are controlled by many factors such as structure,fault,lithology,and so on.The oil-gas field has a variety of reservoiring schema,while the deep E13 strata composed a native high-pressure gas reservoir and the middle-shallow N1-N22 strata composed a secondary normal-pressure oil-gas reservoir.Based on the latest exploration results and dynamic exploitation data this paper analyzed the reservoir accumulation pattern of “oil in upper strata and gas in lower strata” and reached following conclusions:The E13 gas reservoir,which was formed by the second period of injection,is an abnormally high-pressure protogene reservoir with good trapping conditions;The protogene E23 reservoir was destroyed by Xianbei fault formed during later period,which allowed the migration of hydrocarbon to upper strata;The N1-N22reservoir was the result from effects of faults and lithology,which was a normal-pressure secondary oil-gas reservoir and formed by the first period of injection.The conclusions have directive significances to the exploitation of Nanbaxian oil-gas field.
XIE Yong-chen,GUAN Ping,YANG Guo-jun,BAO Ji-cheng . Reanalysis of Reservoir Accumulation Mechanism in Nanbaxian Oil-gas Field[J]. Natural Gas Geoscience, 2012 , 23(5) : 876 -883 . DOI: 10.11764/j.issn.1672-1926.2012.05.876
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