Regularity Of Hydrocarbon Enrichment In Slope Belt Of The Jizhong Depression

The gentle slope of haft-graben fault depression with large area and inherited development is close to oil-generating center, so it has good reservoir forming conditions. Dustpan faulted for depression for nearly a year of hard work to gentle slope with research, type in the slope, tectonic style, fault sealing, transporting system and accumulation model, exploration methods and exploration aspects, such as achieved some results and Understanding.System research the slope belt, studies the scheme of classification of slope belt types are classified according to the influence factor and slope belt causes, width and stratigraphic angle, will be divided into three categories of slope six types: sedimentary slope including platform type slope, wide slow type slope, narrow steep slope, double type of slope; Tectonic slope including lift oblique type tectonic slope; Compound slope sedimentary structure including the transformation slope.Slope belts unblocked transport system and reservoiring pattern varied, but overall with "ladder shape" primarily. Slope belt platform type development platform "T" type and platform "F" type petroleum system and reservoiring pattern; Wide slow slope zone development "type of composite ladder shape" petroleum system and reservoiring pattern; The narrow steep slope zone development of "simple ladder shape" petroleum system and reservoiring pattern; Double yuan type "set - slope zone development scattered" outfit unblocked transport system and reservoiring pattern; Reviving the slope belt oblique type development "simple ladder shape" petroleum system and reservoiring pattern; Inverse transformation slope belts development "mesh" petroleum system and reservoiring pattern.The hydrocarbon enrichment of gentle slope depends on many geological factors, formation dip dominates lateral migration and distribution area of hydrocarbon; hydrocarbon source rock distribution enriches the hydrocarbon abundance of the gentle slopes which have big dip and directly dictates hydrocarbon distribution of the gentle slopes with small dip; the fault throw of contemporaneous fault which is in the medial side of gentle slope belt is great, so the gentle slope belt has many enrichment stratums, while less enrichment stratums exist in place where fault throw is small; nose structure zone shows the direction of hydrocarbon regional migration; crossrange blockage of antithetic fault is strong. The antithetic faults which are great and near salient dominate the hydrocarbon distribution and form the reservoir boundary of gentle slope belt.