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High Resolution Processing and Application of Induction Logging in Yushulin Oil-filed

Author: ZengKe
Tutor: ZhangMeiLing
School: Northeast University of Petroleum
Course: Earth Exploration and Information Technology
Keywords: induction log adaptive deconvolution vertical resolution matching
CLC: P618.13
Type: Master's thesis
Year: 2011
Downloads: 54
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Abstract


With the deepening development of oil and gas fields, how to improve Potential of remaining oil in thin, poor reservoir in initial stage has become a key task oil and gas reserves. Measurement of formation resistivity is the main basis for log interpretation and evaluation of oil and gas reserves, the induction log is an important method of resistivity measurement. To Improve the vertical resolution of the measurement curve, to give reasonable resistivity value, it plays an important role. for accurate evaluation of the distribution of remaining oil.Adaptive deconvolution on induction well logging response function is method used wildly to improve the induction well logging resolution. This paper study the technique on improvement and matching of resolution on dual-induction tools. First, this paper inspests the tools detection property by using the response function coming from the Born first-grade approximation theory. On the basis of inspection of deconvolution open-window technique, the following cases can be obtained by adjusting window’s function’s offset frequency:on the condition of different blackgrond conductivity, medium induction have same vertical resolution during wide scope of blackground conductivity values by using different filter function. Similarity, every deep-induction has the same vertical resolution on the scope of the blackground conductivity values. And using the high-frequency part of the medium induction signal to complement the high-frequency part of the deep induction signal, the vertical resolution of deep induction well logging is improved as the vertical resolution of the medium induction well logging.Dual-induction logging curves on some typical formation modals have been processed by the adaptive deconvolution technique in this paper. Inspection result shows, the deconvolution process with the fix blackground conductivity i.e. fix filter function,some improvement on the lay’s-division and the fit degree to the true resistivity value,but the result can’tapproach to the true resistivity value, and the matching of medium-deep induction well logging vertical resolutions; choosing the blackground conductivity values on measurement dots can remarkablely improve the process result of adaptive deconvolution, and the matching of medium-deep induction well logging vertical resolution.This research work area - Yushulin Fuyang oil layer is a typical low porosity and permeability fields, from 1993 till now, Moisture content of major reservoirs has reached 70%. And because the work area reservoirs are affected by multiple factors uch as faults and lithologys, the reservoir is thin, planar phase change fast, connectivity is poor, in Logging recognition before and after flooding, induction logging projects need be increased . for the limited capacity of the vertical resolution of Induction logging data,this pater process the dual-induction logging data of the Yushulin oil-field on the adaptive deconvolution,the result basicly approach to the true resistivity value, Oil reservoir flooded situation identify is better.

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