Research On Fluid Identification Method In Fuyang Oil Reservoir Of Xingbei Block

Xingbei Fuyang reservoir is in northern of Xingshugang oil field in Daqing. Because the period and series of well logging are different, logging interpretation standards are not unified. At the same time, the data from coring、logging and oil testing has relatively large error, production data、reservoir physical property and oiliness change significantly, so it is not easy in discerning oil and water layer and explaining reservoir parameters interpretation.Through analyzing coring、test oil and logging data of key wells, the four properties’ relations of reservoir is studied, it concludes deep lateral resistivity is high when lithology、physical properties and oiliness are good. And then the plate of four properties’ relations is established, through which we can analyze fluid logging response characteristics in Fuyang reservoir. On the basis, according to GR、Sonic, density and median grain diameter,Reservoir parameters interpretation models including clay content, effective porosity, permeability and oil saturation are found. Using oil-producing state law、oil testing method, it can determine physical and electrical limit of the effective formation thickness。The physical Standards in Fuyang reservoir of Xingbei: effective porosity≥9.0%, air permeability≥0.1×10-3μm2;The electrical standard is Δt≥73μs/ft、RT≥14Ω·m. In addition,it is good to use plate methods of multi-parameter fractional steps to discern oil-water layer, which include resistivity-spontaneous potential relationship plate and resistivity- porosity relationship plate. At last, it takes advantage of established model to explan 3 real well logging data. The process result match with oil test results, so identification and evaluation about reservoir fluid is useful in Fuyang reservoir of Xingbei. The study is to lay a solid foundation in deepening fine reservoir description、evaluating Fuyang reservoir potential、determining oil and gas rich region and selecting well favorable area and it has important theoretical significance and economic benefits.