Research On Hydrocarbon Enrichment Regulation Of Paleogene In Jinjia Oil Field

Jinjia oil field is located in huantai of shandong province,the tectonic position is located in the south-west edge of slope belt in dongying sag,Jinjia-fanjia nose-like structure belt south end,the main oil-generative assemblage is shahejie formation.Jinjia oil field reservoir oil-bearing area is small and often obscured by faults,Due to the complexity of control factors,We haven't yet to find out oil and gas enrichment regularity,This urgent needs us to make full use of existing technical advantage to find the hydrocarbon enrichment regularity of Jinjia oilfield,At last,we can use those researches to guide oil and gas exploration and development in this area.Based on the application of earthquake,core,logging,well logging,try oil material,analysis of test data and the previous research results,According to analyze the basic accumulation conditions and dissect the typical reservoirs,analyzing the controlling factors and summarizing the accumulation models of hydrocarbons,revealing hydrocarbon enrichment regularity of Jinjia oilfield,proposing the advantageous regions with large exploration potential.The basic accumulation conditions researches showing that the quality fourth member and the general lower half of the third member of Shahejie Formation are main source rocks,and they have produced lots of hydrocarbons.delta formations are the main potential reservoirs.Sandstones and small percentage of carbonates are the main composition of Shahejie reservoir,which are characterized by the particularly high porosity and permeability.There are two kinds of source-reservoir-cap assemblages: one is the side of the variant,another is lower source rock generation and upper reservoir reservation in the non-oil source strata.Oil and gas transportation system have two types,one is the sand-fault-sand,another is the sand-fault – unconformity,those controlling the ladder shaped migration of oil and gas from the north to the south.there are many kinds of traps in Jinjia area,Lithological-structural trap is common.hydrocarbons have been well preserved.The results of reservoirs anatomy showing that,the well source rocks?good reservoirs and the effectiveness of transportation systems are the favorable accumulation conditions in Jinjia.This area has many kinds of reservoirs,such as the unconformity reservoirs ? the lithologic updip pinchout reservoirs and the composite reservoir which controlled by fault and lithology.different reservoirs have differences in main controlling factors of accumulation.Jinjia area developes the outside source and sand-fault conducting lithologic trap accumulation mode?Outside source sand-fault conducting lithology-fault combination trap accumulation model and Outside source fault-sand-unconformity conducting stratigraphic trap accumulation model;By controlled of transportation system,trap morphology,favorable reservoir,and preservation condition,reservoirs are mainly enrichment in the quality first and second member and the Upper Submember of the third member of Shahejie Formation in vertically,The quality first member of Shahejie Formation's connectivity is strong in the horizontal.Based on the Hydrocarbon accumulation comprehensive research and evaluation,Predicting the favorable exploration zones of and goals in different horizon and different types of reservoirs.