本文選題：高壓氣井 + 流壓異常�。� 參考：《中國(guó)地質(zhì)大學(xué)（北京）》2015年博士論文

【摘要】：目前國(guó)內(nèi)天然氣隨著鉆探領(lǐng)域的不斷深入，一些深層高壓氣田成為近期開發(fā)的主力，這些氣田由于儲(chǔ)層埋藏深、地層壓力高,動(dòng)態(tài)監(jiān)測(cè)成本高風(fēng)險(xiǎn)大，此外，復(fù)雜的井筒工藝狀況導(dǎo)致監(jiān)測(cè)資料出現(xiàn)異常的頻率高。迪那2超高壓氣田是西氣東輸?shù)闹髁庠粗�，該氣田在開采過(guò)程中受井筒工藝影響，，多數(shù)井存在持續(xù)的流壓監(jiān)測(cè)異常現(xiàn)象，嚴(yán)重影響了對(duì)氣井穩(wěn)產(chǎn)能力判斷，使得生產(chǎn)調(diào)控措施制定存在盲目性和風(fēng)險(xiǎn)。針對(duì)這類流壓異常井的識(shí)別診斷和跟蹤修正是該氣田開發(fā)跟蹤中首先要解決的問(wèn)題。 論文調(diào)研了超高壓氣田儲(chǔ)層應(yīng)力敏感性文獻(xiàn)，消除了應(yīng)力敏感導(dǎo)致氣井流壓異常這一判斷。同時(shí)針對(duì)氣井流壓異常診斷與修正方法開展了國(guó)內(nèi)外文獻(xiàn)調(diào)研，系統(tǒng)總結(jié)了以Blasingame遞減曲線圖版和Agarwal-Gardner遞減曲線圖版為主氣井現(xiàn)代產(chǎn)量遞減分析發(fā)展歷程，剖析了其中氣井流壓異常診斷與跟蹤模擬方法在迪那2氣田氣井流壓異常分析中的局限性。 根據(jù)氣體高壓階段（P50MPa）PVT特征，對(duì)現(xiàn)代產(chǎn)量遞減分析中的“壓力”、“產(chǎn)量”和“時(shí)間”等關(guān)鍵參數(shù)的形式進(jìn)行了簡(jiǎn)化，建立了高壓氣井的標(biāo)準(zhǔn)流動(dòng)曲線和流壓異常診斷圖版。與原有的氣井標(biāo)準(zhǔn)流動(dòng)曲線和診斷圖版相比，高壓氣井標(biāo)準(zhǔn)流動(dòng)曲線和診斷圖版既保留原有的功能，又節(jié)約了計(jì)算流程和工作量，在應(yīng)用時(shí)直接利用生產(chǎn)數(shù)據(jù)，不需要進(jìn)行任何復(fù)雜的計(jì)算程序和專業(yè)軟件，便于礦場(chǎng)日常分析計(jì)算。 從確定的高壓氣井標(biāo)準(zhǔn)流動(dòng)曲線的形式來(lái)看，氣體在高壓階段可壓縮性差，剛性強(qiáng)，具有準(zhǔn)液體性質(zhì)，因此高壓氣井的標(biāo)準(zhǔn)流動(dòng)曲線形式與油井的標(biāo)準(zhǔn)流動(dòng)曲線形式相似。 利用連通氣藏生產(chǎn)過(guò)程中不同部位流壓下降特征，確定了單井控制儲(chǔ)量比例（井控儲(chǔ)量/氣藏總儲(chǔ)量）與單井產(chǎn)量比例（單井產(chǎn)量/氣藏總產(chǎn)量）線性正相關(guān)系，建立了考慮井間干擾情況下井底流壓跟蹤修正方法，克服傳統(tǒng)方法由于無(wú)法考慮鄰井產(chǎn)量變化和氣田總體調(diào)產(chǎn)的影響，而導(dǎo)致的修正后井底流壓與氣田總體變化趨勢(shì)不符現(xiàn)象。 對(duì)迪那2氣田流壓異常井開展了診斷與跟蹤修正，該氣田流壓異常井在診斷圖版上均表現(xiàn)出流動(dòng)曲線在后期向下偏離標(biāo)準(zhǔn)曲線現(xiàn)象，說(shuō)明井筒摩阻異常，井底流壓計(jì)量偏低。異常井修正后流壓變化趨勢(shì)與正常井變化趨勢(shì)一致，符合連通氣藏特征。根據(jù)修正結(jié)果開展了氣井生產(chǎn)制度合理性評(píng)價(jià)，指出部分井配產(chǎn)高，生產(chǎn)壓差大，存在水侵風(fēng)險(xiǎn)，應(yīng)進(jìn)一步降低氣井產(chǎn)量。
[Abstract]:At present, with the deepening of the domestic natural gas drilling field, some deep high pressure gas fields have become the main force in recent development. These gas fields are characterized by deep reservoir burial, high formation pressure, high dynamic monitoring cost, and high risk. Complex wellbore process conditions lead to high frequency of abnormal monitoring data. Dina 2 ultra-high pressure gas field is one of the main gas sources for gas transmission from west to east. The gas field is affected by wellbore technology in the process of production, and there is a continuous abnormal flow pressure monitoring phenomenon in most wells, which seriously affects the judgement of stable production ability of gas wells. Make production control measures to formulate blindness and risk. The identification, diagnosis and tracking correction of this kind of abnormal fluid pressure wells are the first problems to be solved in the development and tracking of the gas field. In this paper, the stress-sensitivity literature of the reservoir in ultra-high pressure gas field is investigated, and the judgment of abnormal flow pressure caused by stress sensitivity is eliminated. At the same time, based on the domestic and international literature investigation on the abnormal diagnosis and correction method of gas well flow pressure, the development history of modern production decline analysis of gas well is systematically summarized, which is mainly composed of Blasingame decline curve and Agarwal-Gardner decline curve. The limitation of gas well flow pressure anomaly diagnosis and tracking simulation method in Dina 2 gas field is analyzed. According to the characteristics of P50MPA / PVT in gas high pressure stage, the forms of "pressure", "production rate" and "time" in modern production decline analysis are simplified, and the standard flow curve of high pressure gas well and the diagnostic chart of abnormal flow pressure are established. Compared with the original standard flow curve and diagnostic chart of gas well, the standard flow curve and diagnostic chart of high pressure gas well not only retain the original function, but also save the calculation flow and workload. There is no need for any complicated calculation program and professional software to facilitate the daily analysis and calculation of the mine. Judging from the determined form of the standard flow curve of high pressure gas wells, the compressibility, rigidity and quasi-liquid property of gas in high pressure gas wells are poor, so the standard flow curves of high pressure gas wells are similar to the standard flow curves of oil wells. The linear positive phase relationship between single well controlled reserve ratio (well controlled reserve / total gas reservoir reserve) and single well production ratio (single well production / gas reservoir total production) is determined by using the characteristics of flow pressure drop in different parts of connected gas reservoir. A correction method for bottom hole flow pressure tracking considering inter-well interference is established to overcome the phenomenon that the modified bottom hole flow pressure does not conform to the general change trend of gas field due to the inability of the traditional method to consider the effects of the production change of adjacent wells and the overall regulation of the gas field. The abnormal well of flow pressure in Dina 2 gas field has been diagnosed and corrected. The flow curve of abnormal well shows the phenomenon of deviation from the standard curve in the later period, which indicates that the friction of wellbore is abnormal and the measurement of flow pressure in bottom hole is low. The change trend of flow pressure after correction of abnormal wells is consistent with that of normal wells, and accords with the characteristics of connected gas reservoirs. According to the revised results, the rationality evaluation of gas well production system is carried out, and it is pointed out that the production rate of gas wells should be further reduced because of the high production distribution, the large production pressure difference and the risk of water invasion in some wells.
【學(xué)位授予單位】：中國(guó)地質(zhì)大學(xué)（北京）
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE35

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本文編號(hào)：2012300