Abstract
Abstract On the basis of oil and gas distribution in southern Huanghua Depression, the hydrocarbon accumulation conditions and developing characteristics of the main faults of different stages are researched. The mechanism of source faults accumulating hydrocarbon is analyzed. Research shows that the seismic pumping mechanism of long-term developing source faults is the main driving force of hydrocarbon accumulation. The sources of seismic pumping control the horizontal distribution of hydrocarbons, while the sources of seismic pumping and the secondary seismic pumping sources produced by the main tensional layer control the lengthways accumulation of oil and gas. The reservoir sands or oil traps near the seismic pumping region may be the most efficient fields for hydrocarbon accumulation. Hydrocarbons sourced from the second member of the Kongdian formation are mainly distributed at the southwest tail of the Kongxi fault and the fault rapidly decreased displacement or the abruptly changed strike of the Kongxi, Fenghuadian, and Kongdong faults. The main tensional layer of the upper Kongyi formation accumulates large quantities of oil and gas.
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