Porosity logging interpretation of low-porosity compact sandstone of Upper Triassic Xujiahe Formation in Sichuan Basin,China

On the basis of core description, integral fracture recognition, lithomechanics test, 3D finite element numerical simulation is used to quantitatively predict fractural growth characteristics and distribution rules of Es4 low permeability and tight sandstones in the area.

Research on calculation of effective stress in low-permeability sandstone rock under cyclic loading and unloading

Analysis on main controlling factors of physical property of tight sandstone reservoir;

Application of temporary and shielding plugging technology to improve well logging responses for tight sandstone gas reservoir;

Current status and prospect of key techniques for exploration and production of tight sandstone gas reservoirs in China;

Four different methods,including support vector machine(SVM),artificial neural network(ANN),multiple regression analysis(MRA) and parameter product decision(PPD),were applied to the gassiness evaluation of forty gas-bearing layers in the tight sandstones of Tabamiao Area in Ordos Basin.

Xujiahe Formation in the south of west Sichuan is composed of tight sandstones with unconventional extra-low porosity and permeability.

Distinguishing gas-bearing formation from compact sandstone with pattern recognition;