Scoping study of unconventional oil and gas potential, Yukon

A review of the essential elements of unconventional accumulations, and a survey of activity in North America and worldwide, set the stage for understanding prospectivity of Yukon reservoirs. [...] Types of Unconventional Oil and Gas Reservoirs Three distinct types of unconventional oil and gas reservoirs are generally recognized: •. coal beds, hosting coalbed methane (CBM), also known as coal seam gas (CSG); •. tight reservoirs, both clastics and carbonates, hosting oil and gas; and •. shale reservoirs. [...] Bustin and Clarkson (1998) described it in more detail: “Coalbed methane, unlike conventional gas resources, is unique in that gas is retained in a number of ways including: (1) adsorbed molecules within micropores (<2 nm in diameter); (2) trapped gas within matrix porosity; (3) free gas (gas in excess of that which can be adsorbed) in cleats and fractures; and (4) as a solute in ground water with [...] Tight Oil and Gas Reservoirs in the United States The classic example of a basin-centred gas system is the San Juan Basin of the western United States. [...] The “tight gas” concept grew in the Rocky Mountain basins of the western U. S. throughout the 1980’s and 1990’s; Hayes (2005) reviewed some of the key advances throughout this time in recognizing the importance and characteristics of tight gas resources.