本文選題：碳酸鹽巖 + 縫洞型氣藏　； 參考：《西南石油大學(xué)》2015年碩士論文

【摘要】：國內(nèi)外針對于碳酸鹽巖縫洞型氣藏應(yīng)力敏感性及底水水侵機理的研究較少,且研究條件與實際氣藏條件差距較大,缺乏必要的經(jīng)驗和理論依據(jù)。本文在國內(nèi)外相關(guān)研究的基礎(chǔ)上設(shè)計合理的實驗方案,針對MX區(qū)塊碳酸鹽巖縫洞型氣藏應(yīng)力敏感及水侵機理以物理模擬為主、數(shù)值模擬為輔的方法進行了研究。本次研究建立了實際地層溫度壓力條件下滲透率應(yīng)力敏感測試方法,模擬實際氣藏開采過程,進行了6組不同滲透率級別縫洞型巖心應(yīng)力敏感性測試。針對垂直連通底水縫洞型儲層,開展3種不同水體大小、2種不同衰竭速度底水水侵實驗。最后建立底水縫洞型氣藏單井?dāng)?shù)值模擬模型,分析不同水體大小、不同水體能量、應(yīng)力敏感性等對底水氣藏開發(fā)效果的影響。 本文研究取得主要成果如下： (1)6塊縫洞型全直徑巖心均具有較強的應(yīng)力敏感性,應(yīng)力敏感不可逆滲透率損失率在30%左右；縫洞型巖心應(yīng)力敏感程度與巖心孔隙度相關(guān)性不大,與巖心滲透率具有較好的相關(guān)性；常規(guī)應(yīng)力敏感測試結(jié)果與高溫高壓地層條件應(yīng)力敏感測試結(jié)果具有一定的差異；(2)底水水體越大,衰竭速度越快,見水時間越早,產(chǎn)氣量越低,水氣比升高越快,氣藏采出程度越低；(3)底水層存在大裂縫溝通時：水體越大、水體能量越強,累產(chǎn)氣量越小,穩(wěn)產(chǎn)性越差,水氣比上升越快；儲層強應(yīng)力敏感影響下,累產(chǎn)氣量降低,穩(wěn)產(chǎn)性變差,水氣比變化不大。 研究成果為縫洞型氣藏開發(fā)開采具有指導(dǎo)意義。
[Abstract]:At home and abroad, there are few researches on stress sensitivity and bottom water invasion mechanism of fractured and cavernous carbonate gas reservoirs, and there is a big gap between the research conditions and the actual gas reservoir conditions, which is lack of necessary experience and theoretical basis. On the basis of relevant research at home and abroad, a reasonable experimental scheme is designed in this paper. The stress sensitivity and water invasion mechanism of carbonate fracture-cavernous gas reservoirs in MX block are studied mainly by physical simulation and supplemented by numerical simulation. In this study, a method for testing permeability stress sensitivity under actual formation temperature and pressure conditions is established, and six groups of fracture-cavity core stress sensitivity tests with different permeability levels are carried out to simulate the actual gas reservoir production process. In view of vertically connected bottom water fracture-cavern reservoir, three kinds of water bodies of different sizes and two kinds of different failure velocity bottom water invasion experiments were carried out. Finally, a numerical simulation model of single well for bottom water fracture-cavity gas reservoir is established to analyze different water body sizes and water energy. The main results obtained in this paper are as follows: the core with full diameter of fracture and cavern type in block No.1 has strong stress sensitivity, and the loss rate of stress-sensitive irreversible permeability is about 30%; The stress sensitivity of the fracture-cavity core is not related to the porosity of the core, but to the permeability of the core. There is a certain difference between the conventional stress sensitivity test results and the high temperature and high pressure formation stress sensitivity test results.) the larger the bottom water body is, the faster the failure rate is, the earlier the water appears, the lower the gas production is, and the faster the water / gas ratio increases. The lower the recovery degree of gas reservoir is, the lower the bottom water layer is when there are large fractures: the larger the water body, the stronger the water energy, the smaller the cumulative gas production, the worse the stable production, the faster the water-gas ratio rises, the lower the cumulative gas production is under the influence of the strong stress sensitivity of the reservoir. The stable production becomes worse and the ratio of water to gas does not change much. The research results are of guiding significance for the development and production of fractured and cavernous gas 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】：2015
【分類號】：TE358

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本文編號：2008898