摘要
As all the nations in the world demand for more and more oil and gas resources and it is decreasing continually, unconventional oil and gas with the large resource potential gradually become the new exploration areas. Unconventional oil has been attached great importance by countries and companies.
As all the nations in the world demand for more and more oil and gas resources and it is decreasing continually, unconventional oil and gas with the large resource potential gradually become the new exploration areas. Unconventional oil has been attached great importance by countries and companies.
