本文選題：特低滲透　切入點(diǎn)：精細(xì)構(gòu)型　出處：《東北石油大學(xué)》2017年碩士論文

【摘要】：油氣田合理開發(fā)開采是石油行業(yè)一項(xiàng)非常重要的工作。將低滲透儲(chǔ)層的儲(chǔ)層評(píng)價(jià)方法應(yīng)用到特低滲透儲(chǔ)層評(píng)價(jià)中存在明顯的不適應(yīng)性。由砂體內(nèi)部建筑結(jié)構(gòu)、剩余油分布模式認(rèn)識(shí)不清導(dǎo)致的注水、注氣等開發(fā)方案收效不明顯,此現(xiàn)象在特低滲透油藏開發(fā)區(qū)是非常常見的問題。因此,研究以該類儲(chǔ)層砂體內(nèi)部建筑結(jié)構(gòu)及剩余油分布模式為基礎(chǔ)的水平井氣驅(qū)開發(fā)方案是十分必要的。東141區(qū)塊為典型的特低滲透油藏。依據(jù)東141區(qū)塊地質(zhì)條件,建立測(cè)井相模式,通過平面組合技術(shù)分析研究區(qū)沉積相特征,總結(jié)出研究區(qū)主力層段的沉積模式主要為曲流河相。以東141區(qū)塊YI6-YI7砂層組為研究對(duì)象,開展了曲流河點(diǎn)壩砂體內(nèi)部建筑結(jié)構(gòu)精細(xì)解剖研究,明確了研究區(qū)點(diǎn)壩砂體內(nèi)部夾層的傾向、傾角、平面分布及夾層密度等參數(shù)。根據(jù)點(diǎn)壩砂體內(nèi)部構(gòu)型參數(shù),利用petrel軟件建立高精度的三維地質(zhì)模型,并根據(jù)油藏構(gòu)型特征、水平井取心資料和油田生產(chǎn)數(shù)據(jù)總結(jié)研究區(qū)主力油層剩余油的三種分布模式。以此為基礎(chǔ)利用Eclipse軟件完成研究區(qū)水驅(qū)歷史擬合,進(jìn)一步修正三維地質(zhì)模型,建立數(shù)值模擬初始參數(shù)場(chǎng)。針對(duì)研究區(qū)前期水平井注CO_2驅(qū)突破快的問題,設(shè)計(jì)了不同的CO_2氣驅(qū)方案,并利用數(shù)值模擬理論完成方案模擬。依據(jù)研究區(qū)3 口水平井、3 口直井聯(lián)合井網(wǎng),以CO_2泡沫驅(qū)替的方式,日注氣總量為150t,保證注采比為1.3:1,注氣年限為5年,5年后改為水驅(qū),直至含水量達(dá)到99%,該方案采收率相較于單純水驅(qū)方案提高12.2%,為研究區(qū)下一步CO_2驅(qū)開發(fā)方案設(shè)計(jì)和實(shí)施提供有力支持。
[Abstract]:Rational development and exploitation of oil and gas fields is a very important work in petroleum industry.There is obvious inadaptability in the application of the reservoir evaluation method of low permeability reservoir to the evaluation of ultra-low permeability reservoir.Due to the construction structure of sand body and the unclear understanding of residual oil distribution pattern, the development schemes such as water injection and gas injection are not effective, which is a very common problem in the development zone of ultra-low permeability reservoirs.Therefore, it is necessary to study the gas drive development scheme of horizontal wells based on the building structure and residual oil distribution model in the sand body of this kind of reservoir.Block 141 is a typical low permeability reservoir.According to the geological conditions of East 141 block, the logging facies model was established, and the sedimentary facies characteristics of the study area were analyzed by plane combination technique, and the sedimentary model of the main formation in the study area was summarized as meandering river facies.The fine anatomical study on the structure of the sand body of the meandering river point dam was carried out in the YI6-YI7 sand formation of block 141 east of the east of the study area. The parameters of the intercalation such as inclination angle plane distribution and intercalation density were determined in the sand body of the point dam in the study area.According to the configuration parameters of point dam sand body, a high precision 3D geological model is established by using petrel software. According to reservoir configuration characteristics, horizontal well coring data and oilfield production data, three distribution models of remaining oil in main reservoir in the study area are summarized.On this basis, Eclipse software is used to complete the historical fitting of water flooding in the study area, and the 3D geological model is further revised, and the initial parameter field of numerical simulation is established.Aiming at the problem of fast breakthrough of CO_2 flooding in horizontal wells in the early stage of the study area, different CO_2 gas drive schemes are designed and simulated by numerical simulation theory.According to the combined well pattern of 3 horizontal wells and 3 straight wells in the study area, the total amount of gas injection per day is 150 t, the guaranteed injection-production ratio is 1.3: 1, the gas injection life is 5 years, and the injection time is changed to water drive after 5 years by CO_2 foam displacement, the total amount of gas injection per day is 150 t, and the guaranteed injection-production ratio is 1.3: 1.Until the water content reaches 99%, the oil recovery of this scheme can be increased by 12.2than that of the pure water drive scheme, which can provide strong support for the design and implementation of the next CO_2 flooding development scheme in the study area.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TE357.7

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