Dissolution in He 8 Sandstones, Sulige Gasfield, Ordos Basin: Origin, Distribution, and Effect on Reservoir Properties

Abstract:

Dissolution plays a dominant controlling role on reservoir properties in delta sandstone of the Permian He 8 Formation, Sulige gasfield. Dissolution forms intergranular dissolved pore and intragranular dissolved pore. Areas with high percentages of dissolved pores occur along delta-plain distributary channel and delta-front underwater distributary channel deposits. Due to dissolution, the porosity increased to 10-17% with permeability as high as 10md. Wells drilled through He 8 sandstones have high daily gas production of 4~6×10⁴m³/d.

• Periodical: Advanced Materials Research (Volumes 807-809)
• Pages: 2257-2262
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.807-809.2257
• Online since: September 2013
• Authors: Wen Ji Lin, Da Zhen Tang, Shu Tao
• Keywords: Diagenesis, Dissolution, He 8 Formation, Reservoir Property, Sulige Gasfield

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