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Research On Reservoir Heterogeneity Of The Second Oil Group Third Member Of Hetaoyuan Formation In Shuanghe Oilfield

Posted on:2010-04-21Degree:MasterType:Thesis
Country:ChinaCandidate:H J FuFull Text:PDF
GTID:2120360278458060Subject:Mineral prospecting and exploration
Abstract/Summary:PDF Full Text Request
In this paper, about the regional geological setting, depositional conditions and diagenetic evolution features, using the key bed method, sequence stratigraphy and the contrast of adjacent wells, we can divide 2nd oil group He-3 member in Shuanghe oilfield into 6 small layers and 27 depositional time units. And accordding to the electrofacies mode, have studied the sedimentary microfacies lingking the small layer contrasted result.On the basis of our predecessors' achievements, we have a standardized treatment to all wells in this paper, unifying the different dimension to different wells, and reunit the standard to uniformly interpretate the porosity and permeability of He-3 member in Shuanghe Oilfield.In the reservoir microscopic heterogeneity study, through the analysis of clastic particles composition at the microscope, we can determine the size, distribution, configuration and connectivity of pore and throat, as well as the rock composition, particle arrangement, matrix content and cement type and so on, to illustrate the microfacies reservoir heterogeneity.During on the study in layer heterogeneity, based on lithology and electricity characteristics of reservoir, we can divide the intraformational bed into three types. Through counting the number of interlayer in the single layer, the thickness of accumulation interlayer, frequency and density of interlayer, based on the frequency and density of interlayer in different sedimentary microfacies sandbody, we can summarize the distribution characteristics of interlayer. We can illustrate the reservior heterogeneity by the classifying to different types sedimentary rhythm and counting the permeability variation coefficients, maxmean ratio and level difference in sand layers.To study the interlaminar heterogeneity, we carry the stratification coefficient, sand density and overlap coefficient to descripe the development and distribution of sand; and using typical contrast curve to determine the lithology and thickness of insulating layers and sum up the distribution characteristics of insulation layer.During the studies of graphic heterogeneity, we can count the geometry parameters according to different sedimentary microfacies sandbody. Under the log interpretation data of each well, we get a set of parameters which can reflect the change of the reservoir characteristics in the plane, including reservoir thickness distribution, porosity and permeability, and mapping.Based on the above studies, the evaluation of reservoir heterogeneity, which to 2nd oil group He-3 member in Shuanghe oilfield, have the great significance to oilfield development and the well network adjustion.
Keywords/Search Tags:Shuanghe Oilfield He-3 member, the small layer division and correlation, sedimentary microfacies, reservoir heterogeneity, permeability
PDF Full Text Request
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