Study on Geological Characteristics of Typical Shale Gas Reservoirs in China

Abstract

shale gas is a kind of natural gas produced from a very low porosity and permeability, dark organic rich shale system. Compared with American shale, Chinese shale has a large amount of brittle minerals, with a brittleness coefficient of 46.15%, North America 38.27%, and China shale ratio as a whole Shale brittleness is better in America. This paper carefully analyzes the geological characteristics of typical shale gas reservoirs in China, analyzes the sedimentary environment and the distribution of organic shale, judges the characteristics of high-quality shale in the “dessert section”, and evaluates the organic pores as the important reservoir space and preservation conditions for shale gas enrichment. Compared with the geological conditions of shale gas reservoirs in North America, the burial depth of China’s marine shale is 1500-5000m, and the best recoverable area of China’s marine shale is located at the structural edge with developed fractures.