本文關(guān)鍵詞： 水驅(qū)氣藏 滲流模型 水侵 Blasingame圖版 動態(tài)分析 方法研究　出處：《西南石油大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：我國現(xiàn)階段開發(fā)的氣藏中,大部分均為不同程度的水驅(qū)氣藏,以四川盆地為例:現(xiàn)已探明的約500個氣藏構(gòu)造中,有水氣藏占到近250個。水驅(qū)氣藏隨著開發(fā)的不斷進行邊底水持續(xù)侵入,一方面氣水兩相流會對生產(chǎn)造成不良影響,特別是在氣井見水后,產(chǎn)量會急劇下降;另一方面以Arps曲線為基礎(chǔ)的傳統(tǒng)產(chǎn)量遞減分析方法和以Blasingame曲線為基礎(chǔ)的現(xiàn)代產(chǎn)量遞減分析方法已經(jīng)在油氣田動態(tài)分析中得到了廣泛應(yīng)用,但這些方法均是基于封閉彈性驅(qū)理論,并不能很好的解決水驅(qū)氣藏的動態(tài)分析問題。因此開展有水氣藏的動態(tài)分析方法研究,對水驅(qū)氣藏精細描述、儲量預(yù)測、開發(fā)效果評價具有重要意義。本文從滲流力學(xué)理論出發(fā),建立了 一套適用于有水氣藏動態(tài)分析的圖版擬合法,得到以下結(jié)論與認識:(1)建立了用于水驅(qū)氣藏動態(tài)分析基礎(chǔ)研究的"斜坡型"水驅(qū)氣藏滲流模型和"階躍型"水驅(qū)氣藏滲流模型。(2)通過對基本模型和邊界流模型進行拉氏變換和求解,得到了有水氣藏滲流模型的定壓產(chǎn)量解與定產(chǎn)壓力解。(3)將得到的"斜坡型"http://cdmd.cnki.com.cn/"階躍型"水驅(qū)氣藏模型與Fetkovich遞減分析理論相結(jié)合,使用Stehfest數(shù)值反演算法編程繪制得到水驅(qū)氣藏Fetkovich典型曲線。分析后發(fā)現(xiàn)水驅(qū)氣藏的Fetkovich典型曲線存在四個流動階段;曲線特征主要受井控半徑,水侵穩(wěn)定時間和水侵穩(wěn)定流量的影響。(4)對水驅(qū)氣藏物質(zhì)平衡方程進行再研究,通過參數(shù)修正和類比的方法,得到了考慮水侵作用的水驅(qū)氣藏修正生產(chǎn)指示曲線和水驅(qū)氣藏物質(zhì)平衡擬時間的表達式;進一步結(jié)合Blasingame遞減分析理論得到了水驅(qū)氣藏遞減曲線圖版,總結(jié)出一套適用于水驅(qū)氣藏動態(tài)分析的Blasingame分析法。(5)實例分析,運用動態(tài)分析典型圖版和水驅(qū)氣藏物質(zhì)平衡修正法對兩口典型井進行了動態(tài)分析解釋,與動態(tài)分析軟件結(jié)果進行對比,證明了本方法的可靠性。結(jié)論認為:本文得到的圖版曲線特征與實際生產(chǎn)情況更加吻合,典型圖版擬合法不僅可評價單井控制儲量、滲透率、控制半徑等基礎(chǔ)參數(shù),還可以定量評價水驅(qū)氣藏水侵時間、水侵強度、水體大小等參數(shù),為邊底水氣藏的動態(tài)解釋和高效開發(fā)提供了理論基礎(chǔ)。
[Abstract]:Most of the gas reservoirs developed in China at the present stage are water-driven gas reservoirs of different degrees. Take Sichuan Basin as an example: about 500 gas reservoirs have been proved. Water reservoir accounts for nearly 250 gas reservoirs. Along with the continuous development of water flooding gas reservoir edge and bottom water continuous invasion, on the one hand, gas-water two-phase flow will have a negative impact on production, especially after the gas wells water, the production will decline sharply; On the other hand, traditional production decline analysis method based on Arps curve and modern production decline analysis method based on Blasingame curve have been widely used in oil and gas field performance analysis. Yes. However, these methods are based on the theory of closed elastic flooding and can not solve the problem of water drive gas reservoir performance analysis. Therefore, the research of water reservoir performance analysis method is carried out, the precise description of water drive gas reservoir and reserves prediction are carried out. The evaluation of development effect is of great significance. Based on the theory of percolation mechanics, a set of chart fitting methods suitable for dynamic analysis of water-bearing gas reservoirs has been established in this paper. The following conclusions and understandings are obtained: (1) the percolation model of "slope" water-drive gas reservoir and "step" water-drive gas reservoir percolation model are established for the basic research of water drive gas reservoir performance analysis. The basic model and boundary flow model are solved by Laplace transformation. The constant pressure production solution and constant production pressure solution of water reservoir percolation model are obtained. The model of "ramp type" http: r / cdmd.cnki.com.cnni.com.cnni.com.cnni.obtained is combined with the theory of Fetkovich decline analysis. Stehfest numerical inversion algorithm is used to draw the typical Fetkovich curve of water drive gas reservoir, and it is found that there are four flow orders in Fetkovich typical curve of water drive gas reservoir. Paragraph; The curve characteristics are mainly affected by well control radius, water invasion stabilization time and water invasion stable flow. (4) the mass balance equation of water drive gas reservoir is studied again, and the method of parameter modification and analogy is adopted. The modified production indicator curve of water-drive gas reservoir and the expression of material balance pseudo-time of water-drive gas reservoir considering water invasion are obtained. Combined with the theory of Blasingame decline analysis, the decline curve of water drive gas reservoir is obtained. A set of Blasingame analysis method, which is suitable for the performance analysis of water-drive gas reservoirs, is summarized. The dynamic analysis and interpretation of two typical wells are carried out by using the dynamic analysis typical chart and the material balance correction method of the water drive gas reservoir, and the results are compared with the results of the dynamic analysis software. The reliability of this method is proved. It is concluded that the characteristic of the chart curve obtained in this paper is more consistent with the actual production situation, and the typical chart fitting method can not only evaluate the controlled reserves and permeability of single well. The basic parameters such as control radius can also be used to quantitatively evaluate the water invasion time, water invasion intensity and water body size of water flooding gas reservoirs, which provides a theoretical basis for the dynamic interpretation and efficient development of the edge and bottom water reservoirs.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TE332

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