Research Of Hydrocarbon Accumulation Conditions In Linhe Depression Of Hetao Basin

Based on the direction of structural geology sedimentology and petroleum geology theory guidance using regional geological data and seismic interpretion data on the former research foundation, through field reconnaissance section and outcrop geology the geochemical experiment and analysis, and logging data and core observation, analysis the regional tectonic setting, basin structure, stratigraphy, and sedimentary;Contrast the early cretaceous and Oligocene hydrocarbon source rocks distribution and the evolution of geochemical indicators,analysis the relationship between the oil and gas migration, accumulation and preservation Sum up the conditions of them in Linhe depression. estimate the favorable area, is conducive to oil and gas exploration, has a certain guiding significance.The northern depocencer is favorable area of gas source rock. In Oligocene and early Cretaceous the dark mudstone developed, reach the threshold, mature source rock of linhe depression two sets of source rock, sandstone developed, big thickness, large pore, good permeability, is the favorable reservoir. The east,west Hang Wu fault zone, Southern fault zone, the eastern slope zone west rim and northern depression north rim is favorable area of oil and gas.Oligocene and early Cretaceous trap area is 1593.8 km2, trap types have semi-anticline, block, anticline, are associated with fault activity, are favorable place for oil accumulation.