本文選題：聚合物驅(qū)　切入點：歷史擬合　出處：《東北石油大學》2015年碩士論文　論文類型：學位論文

【摘要】：剩余油分布規(guī)律研究及挖潛工作是油氣田開發(fā)過程中必不可少的組成部分,是原油高效開采的有力保證。大慶油田大規(guī)模開展聚合物驅(qū)油以來,油田全過程跟蹤調(diào)整技術中的宏觀方向調(diào)整越來越受到關注,但同時對注聚后剩余油的定量描述還不是很深入,為了使聚合物驅(qū)的剩余油挖潛技術得到更深入的發(fā)展,本論文選擇了薩爾圖油田南部開發(fā)區(qū)某聚驅(qū)區(qū)塊開展了聚驅(qū)開發(fā)后期剩余油及綜合挖潛技術研究,利用數(shù)值模擬、注入采出井測井資料、密閉取芯資料及精細地質(zhì)研究成果,分析聚驅(qū)開發(fā)后期平面上和垂向上宏觀剩余油分布規(guī)律及沉積單元內(nèi)部剩余油分布規(guī)律。提出不同類型剩余油挖潛技術和方法。對進一步提高聚合物驅(qū)的最終采收率,減緩聚驅(qū)后期含水回升速度,增加階段產(chǎn)油量及油田的可持續(xù)發(fā)展有重要意義。同時也將為其它注聚區(qū)塊指明研究思路和方向,提供技術支持和經(jīng)驗。本文取得如下認識與成果:1.水驅(qū)歷史擬合,全區(qū)儲量擬合相對誤差為0.79%,含水率擬合絕對誤差為絕對誤差0.25%,采出程度絕對誤差為0.24%;試驗區(qū)儲量擬合相對誤差為0.47%,含水率擬合絕對誤差為絕對誤差0.12%,采出程度絕對誤差為0.18%。2.聚合物驅(qū)階段歷史擬合,到2012年3月底,含水率擬合絕對誤差為0.25%,采出程度擬合絕對誤差為0.08%。3.對注聚后剩余油分布特征進行了研究,主流線上平均剩余油飽和度為0.2947,分流線上平均剩余油飽和度0.3146,分流線處剩余油飽和度比主流線處剩余油飽和度平均高0.0214,最高差0.0335。針對注聚后期剩余油主要分布在聚驅(qū)井網(wǎng)分流線處的情況,可以采用周期注聚方式挖潛分流線處的剩余油。4.分別對組合輪換式和線性周期注采方式4個月、6個月、8個月和10個月的開發(fā)效果進行了預測,計算結果表明,組合輪換式和線性周期注采方式注采周期6個月經(jīng)濟效益最好,兩種開發(fā)方式聚驅(qū)階段采出程度分別為11.20%和11.49%,凈收益分別為1707.40萬元和1266.00萬元,組合輪換式收益更好。5.對組合輪換式和含水96%、98%轉(zhuǎn)后續(xù)水驅(qū)的開發(fā)效果和經(jīng)濟效益進行了對比,結果表明組合輪換6個月比含水率96%、98%轉(zhuǎn)后續(xù)水驅(qū)開發(fā)效果和經(jīng)濟效益都好。6.對組合輪換式注入強度對開發(fā)效果的影響進行了預測,計算結果表明,組合輪換周期為6個月,注入強度為原注入強度時開發(fā)效果和經(jīng)濟效益最好,此時聚驅(qū)階段采出程度為11.20%,凈收益分別為1707.40萬元。7.對聚合物濃度對開發(fā)效果的影響進行了預測,計算結果表明,組合輪換周期為6個月,注入強度為原注入強度,聚合物濃度為1800mg/L時開發(fā)效果最好,此時聚驅(qū)階段采出程度為11.31%,凈收益分別為1820.69萬元。
[Abstract]:The study on the distribution of residual oil and the tapping of potential are essential components in the process of oil and gas field development, and are the powerful guarantee for the efficient production of crude oil. Since the large-scale development of polymer flooding in Daqing Oilfield, The macro-direction adjustment in the whole process of oil field tracking and adjustment has been paid more and more attention, but the quantitative description of remaining oil after polymer injection is not very deep. In order to make the remaining oil potential tapping technology of polymer flooding get further development, In this paper, a polymer flooding block in the southern development zone of Saltu Oilfield was selected to study the remaining oil in the later stage of polymer flooding development and comprehensive tapping of potential. By using numerical simulation, well logging data of injection and production, sealing core data and fine geological research results, The distribution law of macroscopic remaining oil in plane and vertical direction and the remaining oil distribution in sedimentary unit in the later stage of polymer flooding are analyzed. The techniques and methods of tapping potential of different types of remaining oil are put forward. The final recovery of polymer flooding is further improved. It is of great significance to slow down the recovery rate of water cut in the later stage of polymer flooding, increase oil production and the sustainable development of oil fields. At the same time, it will also point out the research ideas and directions for other polymer injection blocks. To provide technical support and experience. This paper has obtained the following understanding and results: 1. Water drive history fitting, The relative error of reserve fitting in the whole area is 0.79, the absolute error of water content fitting is 0.25, the absolute error of recovery degree is 0.24.The relative error of reserve fitting is 0.47, the absolute error of water content fitting is 0.12, and the degree of recovery is absolute. The error is 0.18. 2. The history of polymer flooding stage is fitted. By the end of March 2012, the absolute error of water content fitting was 0.25 and the absolute error of recovery degree fitting was 0.08. 3. The distribution characteristics of residual oil after polymer injection were studied. The average remaining oil saturation on the main flow line is 0.2947, and the average remaining oil saturation on the distributary line is 0.3146. The remaining oil saturation at the distribution line is 0.0214 higher than the remaining oil saturation at the main stream line, and the maximum difference is 0.0335.The remaining oil mainly distributes in the later period of polymer injection. The situation at the distribution line of the polymer flooding network, It is possible to use the method of periodic polymer injection to excavate the remaining oil at the distribution line. The combined rotation method and linear cycle injection-production method are used to predict the development effect of 4 months, 6 months, 8 months and 10 months, respectively. The results show that, The combined rotation and linear cycle injection-production cycle have the best economic benefit in 6 months. The recovery degree of the two development methods in polymer flooding stage is 11.20% and 11.49% respectively, and the net income is 17.074 million yuan and 12.66 million yuan, respectively. 5. The development effect and economic benefit of combined rotation type and water cut 96% to follow up water drive are compared. The results show that the combined rotation for 6 months is better than the water cut of 96% and 98% for the subsequent water drive development. 6. The effect of the combined rotation injection intensity on the development effect is predicted. The calculation results show that the combined rotation period is 6 months. When the injection strength is the original injection strength, the development effect and economic benefit are the best, and the recovery degree is 11.20 and the net income is 17.074 million yuan, respectively. The influence of polymer concentration on the development effect is predicted, and the calculation results show that, The combination rotation period is 6 months, the injection intensity is the original injection strength, and the polymer concentration is 1800mg/L, the development effect is the best. At this time, the recovery degree of polymer flooding stage is 11.31, and the net income is 18.2069 million yuan respectively.
【學位授予單位】：東北石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE327

【參考文獻】

相關碩士學位論文 前1條

1 趙忠軍;百21井區(qū)克下組油藏剩余油分布與挖潛措施研究[D];西南石油大學;2007年

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本文編號：1649995