... Abstract The thick tight sandstones in ten slim-hole vertical wells were classified to different paleo-current energy deposits by new generation high-definition oil-based microresistivity image logs. The thick tight sandstones were 100 to 300m thick in the Cretaceous Bashijiqike Formation...

... at the microscale plays a critical role in predicting the performance of hydraulic fracturing during and after the "frac job". In this paper, we propose a method to investigate the fracture initiation and propagation behaviors in tight sandstones and shales by estimating fracture toughness and directionality using...

... is an alternative resource to conventional resource, which is widely distributed in China and other countries in the world. Tight oil refers to the oil that accumulates in source rocks as free or adsorbed substance, or the oil that accumulates in tight sandstones and carbonates adjacent to source rocks. Generally...

...; the reservoir rocks are the tight sandstones in Xu2, Xu4 and Xu6 members. The source rocks and the reservoirs distribute alternatively and widely in "sandwiched" structure, providing favorable conditions for natural gas accumulating near source. As the formations are gentle and lack of structural traps...

... Summary Tight sandstone gas as one kind of unconventional resources has taken up a significant part in natural gas resource growth in recent years. Tight sandstone gas originated from the definition of U.S. Gas Policy Act of 1978, that regulated in-situ gas permeability to be equal to or less...