Controlling Factors of the Organic Content in the Montney and Doig Formations (Alberta / British Columbia): Insights from Multi- Proxies Analysis and Sequence Stratigraphy

During the last decade, the shift of the oil and gas industry towards unconventional resources in North America has brought the focus on self-sourced reservoirs. The occurrence of hydrocarbons in these reservoirs is strongly associated with in situ organic content and maturation. On the other hand, the effective extraction of this resource depends on the brittleness of the reservoir, mainly controlled by the mineralogy of the matrix and by rock fabric (natural fractures, bedding...). Hence, understanding the distribution of organic heterogeneities and associated mineralogical variations is paramount to reduce the risk in exploration and development of unconventional resources. The Montney and the Doig Formations (Fms) are a suitable exemple to study the controlling factors of the organic heterogeneities. These formations are known from the petroleum industry since the early 60s. They present both conventional and unconventional plays (NEB, 2013) which allow to have data on the whole sedimentary system.