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Heterogeneity Evaluation Method Of Ⅱ-type Oil Reservoir

Posted on:2005-02-06Degree:MasterType:Thesis
Country:ChinaCandidate:H L ZhuFull Text:PDF
GTID:2120360122475357Subject:Mineral prospecting and exploration
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As the â…¡ -type oil reservoir has been focused on as a new highlight in the sustainable development of oil field. To explore a set of new evaluation methods for â…¡ -type oil reservoir heterogeneity has great theoretical significance and broad prospect. In the thesis, considering S â…¡ and Sill oil reservoir groups of the western part of Bei- â…¡ in the Sabei development area as the target, the regional geological background in which â…¡-type oil reservoirs have formed, was studied firstly. In view of the research results from polymer flooding, oil reservoir was classified into three types and the term of â…¡-type oil reservoir was defined precisely. According to the former research results, by the method of reservoir correlation, that is, by combining sedimentary cycle correlation, hierarchical control and discriminating different sedimentary facies association, the â…¡-type oil reservoir in the research target was divided 28 sedimentary units and sedimentary microfacies mode of â…¡-type oil reservoir was built. In the light of sedimentary development characteristics, â…¡-type oil reservoir was divided into 5 sorts again. Observing critically the former research result of heterogeneity was defined as inhomogeneity of the field which controls and influences the flow and distribution of fluid in oil reservoirs, and it was divided into two types: micro-heterogeneity and macro-heterogeneity which was divided into Internal, Interbedded and lane heterogeneity again. Their research contents and methods were respectively described. The author advocates that micro tectonics belong to category of plane heterogeneity, then the significance, contents and research method were given in detail. Integrating the inter-well parameters prediction methods with cross-check method, Kriging interpolation method proved to be the most ideal geological interpolation method. Combining the domestic and abroad researches, several sets of comprehensive models evaluating the â…¡-type oil reservoir heterogeneity were built by applying the geological empirical formulae and theory of mathematics statistics. The evaluating principle and process of these methods were also described in detail. Owing to the geological information of research target, the application of each model was also discussed in the end.
Keywords/Search Tags:reservoir description, reservoir evaluation, reservoir heterogeneity, Ⅱ-type oil reservoir
PDF Full Text Request
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