Oil Distribution Laws and Main Controlling Factors Analyses of Fuyu Reservoir in Xinmiaoxi-Xinbei Area

Abstract

The distribution of oil and water in Xinmiaoxi-Xinbei area Fuyu reservoir is very complicated and the variation of productivity is very large. The distribution on the whole is continuous,but there are special hydrocarbon accumulation characteristics that lower place oiliness but high location multi-water. From the six major geological factors: source, reservoir and cap rock, trap, migration,and preservation condition, synthetically considering the distribution of mature source rock, underwater distributary channels distribution, the matching relation of fault and sand, single trap and inherited palaeostructure, combined with the distribution regular of reservoir to study the enrichment regularity of research. Finally find that this research area has a accumulate characteristics, that is, ancient tectonic controlled potential, the single trap reservoir control the reservoir, lithology control boundary, single sand bodies control layer. Among these, the high ancient structure formed before the peak of hydrocarbon expulsion is the advantage point oil and gas migration, is also the main control factors of continuous distribution of oil and gas; Single trap is the main controlling factor of the complex oil-water distribution that "high position is water and low position is oil", and then we can determine the cause of the complex regularities of oil-water distribution.