Insights into the petroleum geology and stratigraphy of the Dakota interval (Cretaceous) in the San Juan Basin, northwestern New Mexico and southwestern Colorado

Energy and Mineral Resources of New Mexico: Uranium Resources

“…Head and Owen (2005) concluded that trapping in the Basin Dakota reservoir is largely stratigraphic, but that the reservoir boundary on the west side of the accumulation is marked by a downdip gas to updip water transition in an otherwise continuous reservoir; gas limits to the south and east are controlled by stratigraphic pinchouts of the reservoir sandstones in Dakota-equivalent shales. Head and Owen (2005) also presented data that indicate there are three main compartments in the Basin Dakota reservoir that are not in pressure communication with each other and that the boundaries of these pressure compartments are controlled by depositional facies within the Dakota. Fassett and Boyce (2005) similarly concluded that the Basin Dakota trap is formed primarily by lenticular Dakota sandstones encased in marine shales with additional compartmentalization and barriers to fluid flow provided by north-south trending fractures.…”

Energy and Mineral Resources of New Mexico: Metallic Mineral Deposits

“…Formation) and a lateral change from downdip gas-saturated sandstone to updip water-saturated sandstone with gas retained in the downdip sandstones, because of lower permeability associated with smaller pore sizes. Head and Owen (2005) concluded that trapping in the Basin Dakota reservoir is largely stratigraphic, but that the reservoir boundary on the west side of the accumulation is marked by a downdip gas to updip water transition in an otherwise continuous reservoir; gas limits to the south and east are controlled by stratigraphic pinchouts of the reservoir sandstones in Dakota-equivalent shales. Head and Owen (2005) also presented data that indicate there are three main compartments in the Basin Dakota reservoir that are not in pressure communication with each other and that the boundaries of these pressure compartments are controlled by depositional facies within the Dakota.…”

Energy and Mineral Resources of New Mexico: Coal Resources

“…Formation) and a lateral change from downdip gas-saturated sandstone to updip water-saturated sandstone with gas retained in the downdip sandstones, because of lower permeability associated with smaller pore sizes. Head and Owen (2005) concluded that trapping in the Basin Dakota reservoir is largely stratigraphic, but that the reservoir boundary on the west side of the accumulation is marked by a downdip gas to updip water transition in an otherwise continuous reservoir; gas limits to the south and east are controlled by stratigraphic pinchouts of the reservoir sandstones in Dakota-equivalent shales. Head and Owen (2005) also presented data that indicate there are three main compartments in the Basin Dakota reservoir that are not in pressure communication with each other and that the boundaries of these pressure compartments are controlled by depositional facies within the Dakota.…”

“…Head and Owen (2005) concluded that trapping in the Basin Dakota reservoir is largely stratigraphic, but that the reservoir boundary on the west side of the accumulation is marked by a downdip gas to updip water transition in an otherwise continuous reservoir; gas limits to the south and east are controlled by stratigraphic pinchouts of the reservoir sandstones in Dakota-equivalent shales. Head and Owen (2005) also presented data that indicate there are three main compartments in the Basin Dakota reservoir that are not in pressure communication with each other and that the boundaries of these pressure compartments are controlled by depositional facies within the Dakota. Fassett and Boyce (2005) similarly concluded that the Basin Dakota trap is formed primarily by lenticular Dakota sandstones encased in marine shales with additional compartmentalization and barriers to fluid flow provided by north-south trending fractures.…”