本文選題：巖石 + 寬帶�。� 參考：《長安大學(xué)》2016年碩士論文

【摘要】：儲層巖石電特性是判斷油水層及地下油氣儲集分布等的重要因素,巖石電特性參數(shù)的準(zhǔn)確測量對電法測井具有重要意義。本文提出了一種基于平行板電容法原理的巖石寬帶電特性虛擬化測量方法,并對該虛擬化測量方法的有效性及準(zhǔn)確性進(jìn)行了驗證分析。本文在充分研究平行板電容測量夾具結(jié)構(gòu)、原理的基礎(chǔ)上,利用HFSS高頻電磁仿真軟件建立測量夾具的精確數(shù)值模型,在100KHz-1GHz頻率范圍內(nèi),對幾種混合材料樣本進(jìn)行虛擬化測量,所得介電常數(shù)與理論參考值及實驗測量結(jié)果吻合度較好,驗證了虛擬化測量的可行性。針對700MHz以上高頻段測量值出現(xiàn)不穩(wěn)定及偏離理論參考值的問題,通過對該測量系統(tǒng)的結(jié)構(gòu)及電場分布深入分析,對電容器數(shù)值模型的阻抗過渡結(jié)構(gòu)進(jìn)行了設(shè)計優(yōu)化,并制作實現(xiàn)了一套優(yōu)化高頻測量特性的實驗測量夾具。優(yōu)化后的測量系統(tǒng)得到待測件介電常數(shù)值在100KHz-1GHz頻段內(nèi)更加穩(wěn)定精確,實現(xiàn)了巖石等混合材料電特性的寬帶測量。利用優(yōu)化后的虛擬測量系統(tǒng),在100KHz-1GHz頻率范圍內(nèi),對幾種具有不同晶體結(jié)構(gòu)的經(jīng)典巖石混合材料結(jié)構(gòu)數(shù)值模型進(jìn)行了虛擬化測量及分析,其測量結(jié)果與理論結(jié)果吻合度很高,進(jìn)一步驗證了虛擬化測量方法的有效性及準(zhǔn)確性。這一工作可為任意微觀結(jié)構(gòu)的混合材料電特性測量分析及數(shù)字巖芯研究工作提供有效依據(jù)。
[Abstract]:The electric characteristic of reservoir rock is an important factor to judge the distribution of oil and water reservoir and underground oil and gas reservoir, and the accurate measurement of rock electrical characteristic parameters is of great significance to electric logging. In this paper, a virtualization method of rock broadband electrical characteristics based on parallel plate capacitance method is proposed, and its validity and accuracy are verified and analyzed. In this paper, the structure of parallel plate capacitance measuring fixture is fully studied. On the basis of the principle, the accurate numerical model of measuring fixture is established by using HFSS high frequency electromagnetic simulation software. In the frequency range of 100KHz-1GHz, several kinds of mixed material samples are virtualized measured. The dielectric constant is in good agreement with the theoretical reference value and the experimental results, which verifies the feasibility of virtualization measurement. In order to solve the problem of instability and deviation from the theoretical reference values in the high frequency band above 700MHz, the impedance transition structure of the capacitor numerical model is designed and optimized by analyzing the structure and electric field distribution of the measuring system. A set of experimental fixture for optimizing the characteristics of high frequency measurement is made. The optimized measurement system has obtained a more stable and accurate dielectric constant value in 100KHz-1GHz band, and has realized the wideband measurement of the electrical properties of rock and other mixed materials. Using the optimized virtual measurement system, several classical rock mixed material numerical models with different crystal structures are measured and analyzed in the frequency range of 100KHz-1GHz. The measured results are in good agreement with the theoretical results. The validity and accuracy of the virtualization measurement method are further verified. This work can provide an effective basis for the measurement and analysis of the electrical characteristics of mixed materials with arbitrary microstructure and for the study of digital cores.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：P631.811

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