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Primary Research of Well-logging Data Forward and It’s Interpretation Method Based on Reservoir Model

Author: ZhangLing
Tutor: ChenGangHua；HuangXuRi
School: China University of Petroleum
Course: Earth Exploration and Information Technology
Keywords: reservoir numerical simulation reservoir model logging forward formation resistivity
CLC: P631.84
Type: Master's thesis
Year: 2010
Downloads: 92
Quote: 0
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Abstract


Along with most oilfields of our country going into high-water-cut development stage by waterflooding development for several decades,changes occur to the underground reservoir which was very complicated originally.Reservoir anisotropism improves on and distribution of remaining oil complicates on.Reservoir numerical simulation is the most scientifical and practical means for reservoir fine development and looking for remaining oil. In recent decades of years,along with the rapid development of computer technology,reservoir numerical simulation technology is improved; new technologies and new methods are continuously mature and put into use.To reservoir numerical simulation, establishing reliable 3D geological models is very important.In the initial stage of reservoir development,we can only obtain a vague understanding due to a little data.Along with development going deeply,data was obtained more and more;understanding to the reservoir is clearer and clearer.In order to obtain better history matching results of reservoir numerical simulation and analyse remaining oil distribution more superior, we must make full use of data from each stage of development to make the reservoir model more accurate.To well-logging data,data of explratory wells,evaluation wells and develoment wells of different development stage can all be well used to restrict the reservoir model because the resolution of logging is higher. This work can obtain better history matching results, therefore,can better servise for the remaining oil development.This paper has studied on how to integrate the well-logging and reservoir numerical simulation to raise the veracity of reservoir numerical simulation and history matching.After the original reservoir model was established and the numerical simulation was performed, the dynamic and static state parameters of the reservoir model can both be used to calculate the time dependent formation resistivity for later resistivity log interpretation by a inverse process of resistivity well-logging interpretation which can also say ’forward’ here in this paper.By comparing the resistivity data from model forward and actual logging, adjusting the parameters to make they match well, can reach the object of optimizing the model’s parameters. The reservoir numerical simulation and the well logging is integrated in this work to enhance the reservoir simulation results constrained by well logs at various time and spatial variability of reservoir model. This study can be used to evaluate remaining oil in the reservoir, for better the new positioning, and optimize the timing of casing logging especially the cased hole resistivity logging.

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CLC: > Astronomy,Earth Sciences > Geology > Geology, mineral prospecting and exploration > Geophysical exploration > Underground geophysical > Collation , interpretation of measurement results
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