本文關(guān)鍵詞：注水開發(fā)砂巖油藏優(yōu)勢滲流通道模擬分析　出處：《西南石油大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 優(yōu)勢滲流通道 注采單元 孔徑分布 孔道體積 模擬分析

【摘要】：我國砂巖油藏分布廣泛,儲量豐富,然而在注水開發(fā)過程中,大多數(shù)油田都已進(jìn)入了高含水階段。長期水驅(qū)加重油層的非均質(zhì)性和層內(nèi)矛盾,使孔喉半徑、滲透率增大,注水井和油井之間逐漸形成了優(yōu)勢滲流通道。注入水優(yōu)先沿高滲孔道流動,造成注入水低效或無效循環(huán),降低水驅(qū)效率,甚至起不到驅(qū)油作用直接從油井中產(chǎn)出,嚴(yán)重影響開發(fā)效益。因此,為了能夠提高產(chǎn)量,必須要準(zhǔn)確地描述出滲流通道以及高滲孔道的孔徑范圍、孔道體積、各級孔道體積占總孔道體積的百分比等關(guān)鍵參數(shù)。長期以來,對優(yōu)勢滲流通道的判別方法主要是定性識別,由于受到井眼環(huán)境因素的影響,通過測井資料識別優(yōu)勢滲流通道存在很多不確定性。因此,準(zhǔn)確地對注采井之間的優(yōu)勢滲流通道進(jìn)行全面的定量計算,并分析注采井之間的孔道發(fā)育情況,仍有待進(jìn)一步的深入研究。本文以王官屯油田C斷塊為例,根據(jù)該區(qū)塊的地質(zhì)概況和儲層特征,確定注采單元中滲流通道的分布區(qū)域,研究滲流通道孔徑分布和孔道體積的計算方法,根據(jù)實(shí)際情況,將孔徑劃分級為超大孔道、大孔道、中孔道、小孔道四個級別。通過對油田原始數(shù)據(jù)的分析處理,模擬注采單元中各級孔道的分布情況和孔道參數(shù),并結(jié)合示蹤劑監(jiān)測結(jié)果,對注采單元之間的滲流通道發(fā)育狀況進(jìn)行驗(yàn)證和定性判斷。除此之外,通過對比分析油層和油水同層的采出程度之間的關(guān)系,模擬研究油水同層時滲流通道的孔徑和體積參數(shù)。同時還提出了根據(jù)孔徑下限設(shè)計堵劑用量的新方法,據(jù)此計算調(diào)剖劑量,為更加準(zhǔn)確的指導(dǎo)油田調(diào)堵施工提供可靠依據(jù)。
[Abstract]:Sandstone reservoirs in China are widely distributed and have abundant reserves. However, in the process of water injection development, most oilfields have entered the stage of high water cut. Long-term water flooding has aggravated the heterogeneity and inner-layer contradiction of oil layers, which makes the radius of pore throat. With the increase of permeability, the dominant seepage channel is gradually formed between the injection well and the oil well, and the injection water flows along the high permeability pore channel preferentially, which results in the inefficient or ineffective circulation of the injection water and reduces the efficiency of water flooding. Therefore, in order to improve the production rate, it is necessary to accurately describe the pore size and volume of percolation channels and high permeability channels. For a long time, the discriminant method of dominant percolation channel is mainly qualitative identification, because of the influence of borehole environmental factors. There are many uncertainties in identifying the dominant percolation channel by logging data. Therefore, the comprehensive quantitative calculation of the dominant percolation channel between injection-production wells and the analysis of the pore development between injection-production wells are carried out. Taking C fault block of Wangguantun Oilfield as an example, according to the geological situation and reservoir characteristics of the block, the distribution area of percolation channel in injection-production unit is determined. The pore size distribution and pore volume of percolation channel are studied. According to the actual situation, the pore size is divided into large pore channel, large pore channel and middle pore channel. Through the analysis and processing of the original data of oil field, the distribution and parameters of each level of pore in injection-production unit are simulated, and the monitoring results of tracer are combined. The development of seepage channels between injection-production units is verified and qualitatively judged. In addition, the relationship between recovery degree of oil layer and oil-water layer is analyzed by contrast. The pore size and volume parameters of the flow channel in the same oil and water layer were simulated. A new method to design the amount of plugging agent according to the lower pore size was also put forward, according to which the profile control dose was calculated. It provides a reliable basis for more accurate guidance of oil field plugging construction.
【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】：2017
【分類號】：TE357.6

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