Dissertation
Dissertation > Astronomy,Earth Sciences > Geology > Of ore deposits > Deposit classification > Fuel deposits > Oil, natural gas

A Research On Reservoir Heterogeneity Of N21 Reservoir Gasikule Oilfield Of Qinghai Provence

Author YuHongFeng
Tutor ZhouWen;ZhaoXiKui
School Chengdu University of Technology
Course Mineral prospecting and exploration
Keywords Gasikule oil field N21 reservoir Reservoir heterogeneity Variation function Sphericity model Flowing cell
CLC P618.13
Type Master's thesis
Year 2002
Downloads 364
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By using of the data of sedimentous microfacies, logging and cores, the text studies in-layer heterogeneity, between-layer heterogeneity and plane heterogeneity of the sand layers in the south part of N2’ reservoir in Gasikule oil field of Qinghai province.The studies of in-layer heterogeneity are as follows:The text depicts the characteristics of heterogeneity by calculating the coefficient ofvariability, Kmax/K and K.max/K.min of sand layers of different sedimentous microfacies; divides interlayer into two types, and counts their numbers, thickness, frequency and density of a single sand layer according to the characteristics of lithology and logging, finally summarizes the characteristics of interlayer distributing; sets up five in-layer heterogeneity models and points out that the primary models are model A and C.The studies of between-layer heterogeneity are as follows:The text depicts sand layers’ growth and distributing conditions by calculating the lamination factor, sandstone density and overlap coefficient; makes certain the lithology and thickness of interlayer by the method of contrasting the typical curves.The studies of plane heterogeneity are as follows:The text counts the parameters of the sandlayers’ geometric shape of different sedimentous microfacies; speculates the conditions of lateral communication by sandstone density according to the method brought forward by J. R. L.Allen; gets a group of parameters including the reservoir thickness, porosity and coefficient of permeability by using Kriging method according to the data of logging results; makes certain the direction of coefficient of permeability with variation function by modeling globosity function; divides the sandlayers into five types by using the method of flowing cell based on three parameters, that is X h, KXh and h/H, and accounts the favorable region.On the base of above-mentioned studies, the text evaluates the heterogeneity of sandlayers and gives the resolutions to these problems to serve the development of the field.

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