本文選題：微觀剩余油 + 微觀仿真模型　； 參考：《中國石油大學(華東)》2015年碩士論文

【摘要】：基于微觀驅替實驗和數字巖心的剩余油研究以微觀仿真模型的制作和高溫高壓驅替實驗為基礎,通過X射線CT掃描構建三維數字巖心,對孔喉網絡結構提取和分析,并結合微觀驅替機理和微觀剩余油形成機理,進行剩余油分布預測。微觀仿真模型以地層孔隙結構為基礎,由激光刻蝕光學玻璃制作而成,能模擬高溫高壓條件下微觀驅替過程,便于觀察和記錄,用于探究微觀剩余油形成機理和分布特征。同時,優(yōu)選樣品進行X射線CT掃描,經過疊加重建、體積元提取、濾波降噪處理、閾值分割、圖像平滑處理、提取孔喉網絡骨架等步驟,模擬孔喉網絡結構。實驗模擬和數字模擬結合,精細刻畫微觀剩余油特征,相互佐證檢驗,提高模擬精度與可信度。研究區(qū)塔中402油藏截止目前已無井生產,停產前含水100%,油藏特征總結為高含水、高采出程度、高溫、高壓、高礦化度、低非均質程度的“五高一低”特征。由于常年水驅注采開發(fā),導致地下儲層的孔喉網絡結構、巖石骨架顆粒、粘土礦物的類型和賦存方式、以及滲流特征等諸因素不斷變化,從而使高含水期微觀剩余油的形成機理與分布模式非常復雜。因此,為進行研究區(qū)微觀剩余油研究,本論文重點開展了高溫高壓微觀仿真模型驅替實驗以及X射線CT掃描構建三維數字巖心兩項工作。三維數字巖心分析提取而成的孔喉網絡結構能夠直觀清晰地表征不同尺寸的孔隙形態(tài)和分布,驅替實驗能夠精細描述微觀剩余油類型及其分布特征。針對研究區(qū)問題,使用兩種模擬技術進行協同分析,揭示剩余油形成機理,分析剩余油潛力,預測剩余油分布,并提出合理的三次采油技術選擇方案,為塔里木油田進一步生產開發(fā)提供理論基礎和指導。
[Abstract]:Based on micro displacement experiment and digital core residual oil research, based on micro simulation model and high temperature and high pressure displacement experiment, 3D digital core is constructed by X ray CT scanning, and the network structure of pore throat is extracted and analyzed. Combined with micro displacement mechanism and micro residual oil formation mechanism, residual oil distribution is predicted. The microscopic simulation model is based on the formation pore structure and is made of laser etched optical glass. It can simulate the microscopic displacement process under high temperature and high pressure and is easy to observe and record. It can be used to study the formation mechanism and distribution characteristics of micro residual oil. At the same time, the optimized sample is scanned by X ray CT, after superposition reconstruction, volume element extraction, filtering and noise reduction, threshold segmentation, image smoothing, extraction of pore throat network skeleton and so on, the network structure of pore throat is simulated. The experimental simulation and digital simulation are combined to depict the microscopic remaining oil characteristics and verify each other to improve the accuracy and reliability of the simulation. Tazhong 402 reservoir in the study area has no well production up to now and has 100 water cut before shutdown. The reservoir characteristics are summarized as high water cut, high recovery degree, high temperature, high pressure, high salinity, low heterogeneity and "five high and one low" characteristics. As a result of perennial water flooding and production development, the pore throat network structure, rock skeleton particles, clay minerals types and occurrence patterns, and seepage characteristics of underground reservoirs are constantly changing. Therefore, the formation mechanism and distribution model of micro residual oil in high water cut period are very complicated. Therefore, in order to study the micro residual oil in the study area, this paper focuses on two tasks: high temperature and high pressure microscopic simulation model displacement experiment and X-ray CT scanning to construct 3D digital core. The pore throat network structure obtained by 3D digital core analysis can clearly characterize the pore morphology and distribution of different sizes, and the displacement experiment can describe the microcosmic remaining oil types and their distribution characteristics in detail. In view of the problems in the study area, two simulation techniques are used to carry out cooperative analysis, to reveal the formation mechanism of residual oil, to analyze the potential of remaining oil, to predict the distribution of remaining oil, and to put forward a reasonable technical selection scheme for tertiary oil recovery. It provides theoretical basis and guidance for further production and development of Tarim Oilfield.
【學位授予單位】：中國石油大學(華東)
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE327

【引證文獻】

相關期刊論文 前1條

1 林承焰;王楊;楊山;任麗華;由春梅;吳松濤;吳玉其;張依e，

本文編號：1866164