本文選題：采收率　切入點(diǎn)：油水井?dāng)?shù)比　出處：《西南石油大學(xué)》2015年碩士論文

【摘要】：尕斯N區(qū)塊于1990年10月投入開(kāi)發(fā),截至2014年4月底已經(jīng)進(jìn)入高含水期,油藏地質(zhì)特征復(fù)雜,儲(chǔ)層砂體分布分散,連片性差,造成剩余油分布復(fù)雜,認(rèn)識(shí)剩余油和開(kāi)采剩余油是油藏開(kāi)發(fā)調(diào)整的重點(diǎn)。研究剩余油的方法有很多,本文主要采用油藏?cái)?shù)值模擬方法模擬剩余油分布,并通過(guò)數(shù)值模擬方法篩選出適合本油藏的開(kāi)采剩余油的方案,具體的研究方法和相應(yīng)的成果為： (1)從儲(chǔ)層物性、潤(rùn)濕性和非均質(zhì)性了解區(qū)塊的地質(zhì)特征,通過(guò)采收率、存水率、水驅(qū)指數(shù)、體積波及系數(shù)和含水率的分析對(duì)油藏的開(kāi)發(fā)效果作出評(píng)價(jià),從中發(fā)現(xiàn)開(kāi)發(fā)效果較差的油層組,通過(guò)對(duì)無(wú)因次采液采油指數(shù)分析把握住油藏的提液時(shí)機(jī),分析油藏的合理油水井?dāng)?shù)比及合理井網(wǎng)密度為井網(wǎng)加密措施提供理論基礎(chǔ)。 (2)采用三維地質(zhì)建模軟件Petrel建立油藏的地質(zhì)模型,模型分為4個(gè)油層組58個(gè)小層。利用Eclipse黑油模擬器再現(xiàn)油藏23年的生產(chǎn)歷史,根據(jù)剩余油的分布情況分析剩余油的富集成因并作出剩余油水淹平面圖,根據(jù)水淹平面圖確定油水井的補(bǔ)孔、堵水和調(diào)剖措施,結(jié)合剩余油儲(chǔ)量豐度圖給出加密井的井位。 (3)優(yōu)化油藏的注采比,確定一個(gè)合理的值,在此基礎(chǔ)上設(shè)計(jì)不同的單井措施方案、井網(wǎng)加密方案和增注提液方案,從2014年4月預(yù)測(cè)到2025年,根據(jù)油藏累計(jì)產(chǎn)油量、油藏含水率和油藏地層壓力選出最佳的挖潛方案。 (4)主要?jiǎng)?chuàng)新點(diǎn)：采用油水相對(duì)滲透率比值擬合法對(duì)油藏采收率進(jìn)行篩選,選出能反映油藏實(shí)際的采收率值；利用油水相對(duì)滲透率表示油水井?dāng)?shù)比公式。
[Abstract]:Gasi N block was put into development in October 1990. By the end of April 2014, it had entered a high water cut period. The geological characteristics of the reservoir are complex, the distribution of reservoir sand bodies is dispersed, and the continuity is poor, resulting in the complex distribution of remaining oil.Understanding remaining oil and producing remaining oil are the key points of reservoir development adjustment.There are many methods to study residual oil. This paper mainly uses reservoir numerical simulation method to simulate the distribution of remaining oil, and through the numerical simulation method to screen out the scheme suitable for the remaining oil production in this reservoir. The specific research methods and corresponding results are as follows:1) to understand the geological characteristics of the block from the reservoir physical properties, wettability and heterogeneity, and to evaluate the development effect of the reservoir through the analysis of oil recovery, water storage rate, water drive index, volume sweep coefficient and water cut.It is found that the reservoir group with poor development effect. Through the analysis of dimensionless recovery oil recovery index, the time of oil extraction is grasped, and the reasonable oil-water well number ratio and reasonable well pattern density are analyzed to provide the theoretical basis for the well pattern infilling measures.2) the geological model of the reservoir is established by using the 3D geological modeling software Petrel. The model is divided into 58 sub-layers of 4 reservoirs.The Eclipse black oil simulator is used to reproduce the production history of the reservoir for 23 years. According to the distribution of remaining oil, the causes of remaining oil enrichment are analyzed and the residual oil flooding plan is made. According to the water flooding plan, the measures of filling hole, plugging water and profile control are determined.The well location of infill well is given according to the abundance diagram of remaining oil reserves.On the basis of optimizing the injection-production ratio of oil reservoir, determining a reasonable value, designing different single well measures, well pattern infilling scheme and increasing injection extraction scheme, from April 2014 to 2025, according to the cumulative oil production of the reservoir,Reservoir water cut and reservoir formation pressure are selected to select the best way to tap potential.The main innovation points are as follows: oil / water relative permeability ratio fitting method is used to screen oil recovery factor, and oil / water relative permeability is used to express oil / water well number ratio formula.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE327

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本文編號(hào)：1709094