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The Study on the Geological Modeling for Kexia Formation in Four-one Area, Xinjiang Oilfield

Author: NiuXiaoFang
Tutor: LiuJianPing
School: Chinese Geology University (Beijing)
Course: Structural Geology
Keywords: Stochastic modeling geological model isochronous formation correlation braided delta reservoir heterogeneities
CLC: P618.13
Type: Master's thesis
Year: 2009
Downloads: 137
Quote: 1
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Abstract


The production status of the Kexia formation is very complcated in the Four-one block of xinjiang oilfield, such as the distribution regularity of reservoir is very complex, the Heterogeneity between layers is very strong,the log data are not complete,four-characteristic relations’ are not clear, the lower limit standard of leffective thickness is not certain,the reserves is need to be evaluated and the remaining reserves is still larger, so it is necessary to research the reservoir characters.Based on a lot cores,drilling,logs and production data,instructed by the theories of high resolution sequence stratigraphy ,Sedimentology and development geology, It is elaborated that formation correlation,sequence stratigrpahic framework,sedimentary facies types,sandstone bodies laying out properties and logs parameter comprehensive evaluation.all the productions contributed to constructe the fine 3D reservoir geology model. main results and innovations Obtained by this research are the aspects as follow:1, Based on my observation and analysis on some cores,l build up the facies pattern of braided delta of the research area.It developes mainly by delta plain and delta front.2, Based on the theory of high resolution sequence stratigraphy and the practice of observation cores, kexia formation is divided to 19 super short base-level cycles , 4 short base-level cycles and 3 middle base-level cycles. So it is divided to 19 layers.3, By analyzing the region tectonics evolvement and making use of the drilling data,I draw up many main stem cross sections and assistance sections to control faults spreading, and recombine the faults in surface. so the structure character of the research area is proved.4, Because the area has been developed for a long time, log series were incomplete lacking of△T and RT curves, I try to seek a method of fitting RT using R02 data and a means of regressing one,two and three dimensional porosity explanation models by SP, Microelectrode etc. By these methods,the difficult problems are solved to evaluate log parameters in old oilfield.5, For the first time, the discovered petroleum initially in place is proved in the Four-one block which can be used in secondly development and reservoir management.6, The model is proved to be very fine and match the real geology by drilling later and relative production data.All these results provide fine parameter preparations in numerical simulation and esidual oil distribution regularity research and insure to deploy correctly development projects.

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