Continuous unconventional natural gas accumulations of Carboniferous-Permian coal-bearing strata in the Linxing area, northeastern Ordos basin, China

摘要

Based on results of laboratory tests and a study of exploration wells, we investigate Carboniferous -Permian unconventional natural gases in lateral extension and vertical sequences in northeastern Ordos basin, China. The primary objectives and techniques are (1) hydrocarbon generation analysis based on Rock-Eval pyrolysis and microscopic observations; (2) reservoir characterization based on depth and thickness extension, nuclear magnetic resonance (NMR) and He porosity/permeability; and (3) gas accumulation analysis based on well cross-sections, field well tests and thermal evolution history.