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  本文選題：頁巖氣藏 + 三重介質(zhì)��； 參考：《西華大學》2017年碩士論文

【摘要】：鑒于傳統(tǒng)頁巖氣藏雙重介質(zhì)模型在描述頁巖氣滲流過程中的局限性,本文將基質(zhì)系統(tǒng)分為有機質(zhì)基質(zhì)系統(tǒng)和非有機質(zhì)基質(zhì)系統(tǒng),并考慮基巖中存在微裂縫,運用頁巖氣藏的物性規(guī)律及滲流機理,建立了不考慮吸附解吸的頁巖氣三重介質(zhì)滲流模型;綜合運用Laplace變換與相似結(jié)構(gòu)理論,得到該三重介質(zhì)模型在Laplace空間中的井底擬壓力,并證實其在不同外邊界條件下具有相似結(jié)構(gòu);利用Stehfest數(shù)值反演方法將井底擬壓力反演到實空間,通過繪制其特征曲線,綜合分析了各主控參數(shù)對特征曲線的影響,并在此基礎(chǔ)上做進一步的工作,探討了考慮吸附解吸現(xiàn)象的三重介質(zhì)滲流模型。將相似構(gòu)造法創(chuàng)造性的融入油氣藏工程中,不僅簡化了油氣藏滲流模型的計算過程,同時為相關(guān)試井分析軟件的開發(fā)和編制提供新方向,新思路。將微裂縫引入頁巖滲流模型的同時又把基質(zhì)分為有機質(zhì)基質(zhì)和非有機質(zhì)基質(zhì),對于傳統(tǒng)模型做出的這些改進將使得滲流模型更加符合頁巖氣的實際滲流過程從而大大提高模型的準確性與實用性。
[Abstract]:In view of the limitation of the traditional dual medium model for shale gas reservoir in describing shale gas seepage process, the matrix system is divided into organic matrix system and non-organic matrix system, and the microfractures in bedrock are considered. Based on the physical property and percolation mechanism of shale gas reservoir, a shale gas triple medium percolation model without considering adsorption and desorption is established, and the bottom hole pseudo pressure of the triple medium model in Laplace space is obtained by using Laplace transform and similar structure theory. It is proved that it has similar structure under different external boundary conditions, and the effect of main control parameters on the characteristic curve is analyzed synthetically by using Stehfest numerical inversion method to invert the bottom hole pressure into real space. On the basis of this, the seepage model of triple medium considering the phenomenon of adsorption and desorption is discussed. The creative integration of similar structural method into reservoir engineering not only simplifies the calculation process of seepage model of oil and gas reservoir, but also provides a new direction and new idea for the development and compilation of relevant well test analysis software. When microfractures are introduced into shale seepage model, the matrix is divided into organic matrix and non-organic matrix at the same time. These improvements made by the traditional model will make the seepage model more consistent with the actual seepage process of shale gas, thus greatly improving the accuracy and practicability of the model.
【學位授予單位】：西華大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TE312

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