Mesozoic oil and gas reservoir formation research of Zhenjing region in south Ordos basin

In south of Ordos basin Zhenjing region, mesozoic hydrocarbon source rock developed with a high abundance of organic matter and high maturity. Extension of blocks to extend are mainly delta-lacustrine system. Tthe front sand-stone of delta provided a good reservoir space for oil and gas gathering, reservoir and cap properly well configured to form multiple sets of favorable reservoir-cap combination. Simple structure in region , mainly are lithologic traps and lithology + low-amplitude structural combination traps,xiqing monoclinic structure has certain control to the oil and gas formation. Low porosity and low permeability, ultralow permeability within this reservoir and in target reservoir, oil-bearing layer is general, reservoir thickness islarge, but the reservoir output uneven. Single well production was significantly affected by the porosity and permeability. The excess pressure formed by Mudstone undercompaction is the initial migration of oil and gas power. The cracks,micro-cracks and contiguous development sand body are the pathway of oil and gas in vertical and horizontal channels.