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  本文選題：天然氣水合物 + 測井評價��； 參考：《中國地質(zhì)大學(xué)(北京)》2015年碩士論文

【摘要】：天然氣水合物作為未來人類理想的替代能源,其儲量評價和勘探開發(fā)一直是人們關(guān)注的熱點(diǎn)與難點(diǎn),解決這個問題的關(guān)鍵在于建立適用于含水合物地層的巖石物理模型。本文在前人研究的基礎(chǔ)上,旨在建立更優(yōu)化的水合物物理模型,選題具有理論意義和實(shí)用價值。本文基于大洋鉆探計(jì)劃(ODP)204航次公開發(fā)布的測井?dāng)?shù)據(jù),針對應(yīng)用廣泛且具有堅(jiān)實(shí)理論基礎(chǔ)的三相Biot模型展開研究。通過對三相Biot方程的研究,提出其本質(zhì)是對縱波速度、橫波速度、密度、孔隙度、水合物飽和度和固結(jié)系數(shù)這六個量之間自洽性的表達(dá)�；谶@個認(rèn)識,本文通過修正模型序參量r,把傳統(tǒng)的三相Biot模型寫成了固結(jié)系數(shù)的顯示形式,建立了改進(jìn)的三相Biot模型。改進(jìn)的模型可以直接計(jì)算出固結(jié)系數(shù)和水合物飽和度,避免了傳統(tǒng)三相Biot模型由于擬合參數(shù)而帶來的誤差。本文利用改進(jìn)的三相Biot模型探討了固結(jié)系數(shù)對反演水合物飽和度結(jié)果的影響。計(jì)算結(jié)果顯示,部分地層固結(jié)系數(shù)20%的偏差,會帶來水合物飽和度40%甚至更大的誤差,表明了模型改進(jìn)的合理性與必要性。進(jìn)一步,通過與核磁共振-孔隙度模型和經(jīng)典的Archie公式計(jì)算水合物飽和度的結(jié)果進(jìn)行對比,改進(jìn)的三相Biot模型顯示了更好的應(yīng)用效果。改進(jìn)的三相Biot模型拓展了傳統(tǒng)三相Biot模型的應(yīng)用范圍,除了反演水合物的飽和度,還可以預(yù)測和評價測井縱波速度、橫波速度、密度和孔隙度數(shù)據(jù)。本文論述了模型預(yù)測或評價的原理和方法,并實(shí)際應(yīng)用于評價204航次已有的測井?dāng)?shù)據(jù)。結(jié)果顯示,在水合物穩(wěn)定賦存區(qū)域,改進(jìn)的三相Biot模型具有較好的預(yù)測和評價能力,反演精度取決于模型計(jì)算所使用數(shù)據(jù)的精確度。
[Abstract]:As the ideal alternative energy in the future, the evaluation of gas hydrate reserves and exploration and development have been the hot and difficult issues. The key to solve this problem is to establish a rock physical model suitable for hydrate formation. On the basis of previous studies, this paper aims to establish a more optimized hydrate physics model, and the topic is of theoretical significance and practical value. Based on the well logging data released publicly by ODP / ODP, the three-phase Biot model, which is widely used and has a solid theoretical foundation, is studied in this paper. Through the study of the three-phase Biot equation, it is proposed that the essence of the equation is the expression of self-consistency among the six variables, namely, the longitudinal wave velocity, the shear wave velocity, the density, the porosity, the hydrate saturation and the consolidation coefficient. Based on this understanding, the traditional three-phase Biot model is written into the display form of consolidation coefficient by modifying the order parameter r of the model, and an improved three-phase Biot model is established. The improved model can directly calculate the consolidation coefficient and hydrate saturation and avoid the error caused by fitting parameters in the traditional three-phase Biot model. In this paper, the effect of consolidation coefficient on the inversion of hydrate saturation is discussed by using the improved three-phase Biot model. The calculation results show that the deviation of partial formation consolidation coefficient of 20% will lead to 40% or even greater error of hydrate saturation, which indicates the rationality and necessity of model improvement. Furthermore, the improved three-phase Biot model is compared with the results of the NMR porosity model and the classical Archie formula to calculate hydrate saturation. The improved three-phase Biot model shows a better application effect. The improved three-phase Biot model extends the application range of the traditional three-phase Biot model. In addition to the inversion of hydrate saturation, the log P-wave velocity, shear wave velocity, density and porosity data can also be predicted and evaluated. This paper discusses the principle and method of model prediction or evaluation, and it is applied to evaluate the logging data of 204 voyage. The results show that the improved three-phase Biot model has good prediction and evaluation ability in the stable hydrate occurrence area, and the inversion accuracy depends on the accuracy of the data used in the model calculation.
【學(xué)位授予單位】：中國地質(zhì)大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.13;P631.81

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 寧伏龍;劉力;李實(shí);張可;蔣國盛;吳能友;孫長宇;陳光進(jìn);;天然氣水合物儲層測井評價及其影響因素[J];石油學(xué)報(bào);2013年03期

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本文編號：1801380