The Time-Space Matching Types Of Oil Accumulation Factors And The Function Of Accumulation Controlling

P oil layer of Shengping-Weixing Area is the new area of increasing of production and reserves in Daqing O ilfield.To study oil distribution law in P oil layer of Shengping-Weixing Area, based on the research of three factors of accumulation and characteristics of oil, the time-space matching types of oil accumulation factors and the function of accumulation controlling in P oil layer of Shengping-Weixing Area were studied by analyzing the relation between oil distribution and reservoir time-space matching. The result indicated that: there are two type of accumulation factors of space matching of oil in Shengping-Weixing Area, one is oil source faults connecting traps in sourcerock area, mainly distribution in southern Shengxi Subsag tectonic element; another is transporting fault-sandstone which connecting traps non sourcerock area, mainly distribution in southern Shengping and Weixing Gentle Slope Zone.The controlling effects of oil accumulation and distribution in Shengping-Weixing Area mainly showed in the following four aspects:① In the type of oil source faults connecting traps in sourcerock area accumulation factors of space matching of oil,the oil mainly accumulated in the traps which connected by oil source faults above sourcerock area;② In the type of transporting fault-sandstone which connecting traps non sourcerock area accumulation factors of space matching of oil, the oil mainly accumulated in the traps near the adva ntages transporting pathway;③ The space matching types of accumulation factors are different, the accumulation extent of oil is different, the oil in P oil layer is more accumulated in traps non sourcerock area connecting with transporting fault-sandstone than that traps in sourcerock area connecting with oil source fault;④ The space matching types of accumulation factors are different, the relation of oil-water distribution is different, the high structure reservoirs in P oil layer traps non sourcerock area connecting with transporting fault-sandstone have a unified oil- water interface, while reservoirs in edges of structure don’t have a unified oil- water interface, the reservoirs in P oil layer traps in sourcerock area connecting with oil source fault have a unified oil-water interface don’t have a unified oil-water interface either.The accumulation factors of time matching of oil in Shengping-Weixing Area mainly reflected in that:the matching of expulsion periods of sourcerock and formation periods of translocation and the matching of oil migration periods and formation period of traps.The controlling effects of oil accumulation mainly showed in the following two aspects:① The matching of expulsion periods of sourcerock and formation periods of translocation controlled the oil migration periods in the research area;② The matching of oil migration periods and formation period of traps controlled the oil accumulation periods.