Reservoir Characteristics of Reef-Shoal Facies, Changxing Formation, Yuanba Gasfield, Sichuan Basin

Pei Rong Zhao

doi:10.4028/www.scientific.net/AMR.998-999.1448

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 998-999Reservoir Characteristics of Reef-Shoal Facies,...

Reservoir Characteristics of Reef-Shoal Facies, Changxing Formation, Yuanba Gasfield, Sichuan Basin

Abstract:

Based on the successful practice of Puguang gas field, in 2006, Well Yuanba 1 was drilled in northeastern Sichuan by SINOPEC, obtaining the gas flow of 503,000 m³ per day in reef-shoal reservoirs in Changxing Formation. This announced the discovery of Yuanba Gasfield. Yuanba Fasfield is a lithologic gas pool with characteristics of: high H₂S content while normal pressure, weak tectonic deformation, deep burial, etc. Yuanba Gasfield is the deepest marine gas fields in Sichuan Basin, the middle of the gas pool reaches the average burial depth of 6,600 m. Reservoirs mainly developed in the Changxing reef-shoal facies with the large scale and good reservoir quality. The reservoir formation was controlled mainly by early meteoric dissolution and dolomitization, while deep dissolution and tectonics contributes a little.

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Periodical:

Advanced Materials Research (Volumes 998-999)

Pages:

1448-1451

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.998-999.1448

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Online since:

July 2014

Authors:

Pei Rong Zhao*

Keywords:

Carbonates, Reservoir Formation, Ultra-Deep Burial, Yuanba Area

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