What are unconventional oil and gas resources

From the twenty-first century, the world has entered a new period of development, countries in oil and gas and other energy demand has risen sharply. Faced with the current, oil and gas supply shortage, countries began turning to  Unconventional gas  resources. So what's a non-conventional oil and gas resources Currently, for what is a non-conventional oil and gas resources, countries are not clearly defined. Unconventional gas resources can be divided into unconventional oil resources and unconventional gas resources. The former mainly refers to the heavy oil, heavy oil, deep oil, the latter mainly refers to low-permeability gas reservoir gas, gas hydrates, deep natural gas and inorganic origin of oil and gas. In addition, oil shale through the appropriate chemical treatment process outputs can be gas and oil, are also unconventional gas resources.

Also defines said unconventional gas resources, refers to the current technical conditions can not be taken out, or does not have the economic recovery of oil and gas resources. Generally include compact and ultra-compact sandstone,  shale gas   heavy overweight, bitumen sandstone, coalbed methane, water soluble gas, natural gas hydrate. However, both conventional and unconventional gas asked transitional, and its boundary with the level of technology available and the price varies in different countries set their boundaries are not the same. Sometimes this part of unconventional gas resources be classified as sub-economic resources, such as most of the oil and gas tight sands are being developed in China, it is no longer emphasized unconventional, often associated with conventional oil and gas are considered together. CBM corporations  unconventional gas  resources, but in many countries to grant preferential policies can be developed, even a fairly large scale.

Under the conditions of modern technology, many of western North America in the development of oil sands bitumen higher when they get a certain economic benefits.