What is shale gas

Shale gas is mined from shale in natural gas, is an important  Unconventional gas  resources. Shale gas formation and enrichment has its own unique characteristics, often located in the basin of thick, widely distributed shale source rock formations. Compared to more conventional natural gas, shale gas development has a long life and exploitation of the advantages of long production cycle, most of the shale gas production and wide distribution, thickness, and generally containing gas, which makes shale gas wells to a stable long-term rate of gas production.
Shale gas is mined from shale in natural gas, the main carbon in dark shale or clay shale,  shale gas  is adsorbed on the body in order to exist in the free state or mudstone, carbon mudstone, shale and pink sandy rocks dissection of natural gas, which can be generated in various stages of organic origin on the body in the free gas phase (about 50%) present in the cracks, porosity and other reservoir space to adsorb state (about 50%) present in kerogen, clay particles and pore surfaces, a very small amount to dissolve the state is stored in kerogen, bitumen and oil in the form of natural gas are also present in laminated siltstone, silty mudstone and muddy siltstone, sandstone formations and even After natural gas generated in the source rock performance within the nearest gathering place for the typical accumulation mode, and oil shale, oil sands, bitumen and other varied. Different from conventional reservoirs with gas, shale gas is both generated source rocks, but also accumulation and preservation of natural gas reservoir and cap rock. Therefore, the high content of organic matter in black shale, mudstone carbon often are the best conditions for shale gas development. Features: shale gas development and production with a long life cycle of exploitation of the advantages of long - most of the  shale gas  production and wide distribution, thickness, and generally gas, shale gas wells to make long-term stable gas production. But shale gas reservoir permeability is low, mining difficult. With the world's energy consumption continues to rise, including shale gas, including unconventional energy more and more attention. United States and Canada and other countries have achieved  shale gas  commercial exploitation. Shale gas reservoirs with generally showed low porosity and low permeability material characteristics, resistance to airflow than conventional natural gas large, all of the wells need to implement reservoir fracturing to be mined on the other hand, shale gas mining yield than conventional natural gas is low, conventional gas recovery above 60%, while the shale gas is only 5% to 60%. Low-yielding influence people to its enthusiasm, and now the United States have some of the advanced technology can improve shale gas production. China shale gas reservoirs compared with the U.S. is different, such as the Sichuan Basin shale gas depth than the U.S. large, U.S.  shale gas  depths of 800 to 2600 m, and the Sichuan Basin page rock gas buried in 2000 to 3500 meters. Shale gas reservoir depth increases undoubtedly in our present immature technology has added a degree of difficulty.