Study On Log Evaluation Method Of Tight Sandstone Reservoirs In Shuangnan Region Of Liaohe Oilfield

As oil exploration and development degree of gradually deepening, the economic value of tight sandstone gas reservoir is gradually known by people, the exploration and development at home and abroad has become a research Gui focus in the oil industry and the frontier problem. But complex origin cause of formation and development of cracks and so on, makes the tight sandstone reservoir lithology density, low porosity, low permeability, strong reservoir heterogeneity and complex relationship between water and the logging interpretation for tight sandstone reservoir evaluation research Gui increased the difficulty.This article first analyzes the coring, oil test and put into production, on the basis of first-hand information, such as in hydrocarbon reservoir lithology, oil content, physical and electrical study, to establish the logging qualitative identification and quantitative identification standards of oil and gas layers, and pass through the sand and sand of just three deep tight sandstone reservoir logging evaluation comparison, find out the differences and difficulties on the logging evaluation, then on the basis of core analysis, the dual laterolog curves and gas moveout correction, which including the shale content, porosity, permeability,median size and saturation logging interpretation model of reservoir parameters such as, and make the correction on the model. Through four research found that compared with sand a thing or two, three section in sedimentary, lithology, oil content, physical and electrical characteristics are there is a big difference,along with reservoir characteristics with distinct uniqueness, the conventional well logging evaluation method to evaluate the application layer is difficult, even impossible to,therefore, in this article has introduced the reservoir quality index and fracture porosity,and connecting with the array induction, imaging and array acoustic logging new technology to the reservoir properties of the three dense sand reservoir,oil and gas, etc. Finally, combine the work area of reservoir geological characteristics of research, and established the q to establish standard of oil and gas layer identification and reservoir parameter interpretation model, on the basis of logging secondary fine processing and interpretation, research work area of oil and gas distribution regularity of water.Application method of this paper, first of all the Wells in the studied area, the evaluation of the secondary interpretation of nine Wells conclusion modified again,and modify the conclusion of 71 layer, then through the analysis of the regional exploration Wells and stratigraphic correlation between Wells, found that the slope break belt is not conducive to looking for tight gas reservoir, in tight sandstone gas is common in the middle of sand three, and in the upper sand three tectonic positions,at the bottom of the sand three rare. Sub-sag OuDeSha reservoirs due to reservoir in the three part in one, two, three paragraphs sand and sand surrounded by four period of mature source rock, reservoir forming condition is superior, but sand reservoir in the third part poor reservoir property, congenital reservoir conditions, so the gas abundance is not high, production is very low.