【摘要】：在陸地油田相繼通過聚合物驅成功實現(xiàn)“穩(wěn)油控水”的增產(chǎn)目標后,部分海上油田也開始了聚合物驅應用的探索與實踐,并取得了明顯增產(chǎn)效果。為進一步了解海上油田聚合物驅油體系和儲層作用關系,為海上稠油油藏聚合物驅提高原油采收率技術決策提供實驗依據(jù),本文以物理化學、油藏工程和高分子材料學為理論依據(jù),以化學分析、儀器檢測和物理模擬為技術依據(jù),以SZ36-1油田儲層地質和流體為研究對象,分別從聚合物驅油體系對儲層物性影響、聚合物驅油體系在儲層中吸附和解吸附規(guī)律及聚合物溶液與儲層適應性方面進行了相關實驗研究和理論分析。結果表明,疏水締合聚合物分子鏈間的締合作用受到調節(jié)劑的影響被抑制,進而疏水締合聚合物溶液性能也受到影響。聚合物在天然油砂上的吸附和解吸附規(guī)律受聚合物濃度、β-環(huán)糊精濃度增加、油砂粒徑大小和液固比等因素影響。疏水締合聚合物溶液在巖心表面的吸附和解吸附規(guī)律受到注入速度、聚合物溶液濃度、β-環(huán)糊精濃度和巖心滲透率等因素影響。隨疏水締合聚合物分子間締合作用變化,聚合物分子聚集體尺寸與巖心孔喉之間的配伍性以及聚合物分子吸附方式也隨之變化,進而引起聚合物溶液流動過程的動態(tài)滯留量變化。隨注入速度的增加,聚合物分子取向能力增強,使得聚合物分子可以進入尺寸更小的巖心孔隙,聚合物動態(tài)滯留量增加。改變疏水締合聚合物的濃度或β-環(huán)糊精的濃度可以改變疏水締合聚合物締合程度,進而改善疏水締合聚合物溶液與非均質儲層間的適應性,提高聚合物驅油效果。
[Abstract]:After the successful realization of the goal of "stabilizing oil production and controlling water" by polymer flooding, some offshore oilfields have also begun to explore and practice the application of polymer flooding, and have achieved obvious effect of increasing production. In order to further understand the relationship between polymer flooding system and reservoir action in offshore oil field, and to provide experimental basis for the technical decision of polymer flooding in offshore heavy oil reservoir to improve oil recovery, the physical and chemical properties of polymer flooding in offshore heavy oil reservoir are studied in this paper. Based on the theory of reservoir engineering and polymer materials, taking chemical analysis, instrumentation and physical simulation as technical basis, taking reservoir geology and fluid in SZ36-1 oilfield as research objects, the effects of polymer flooding system on reservoir physical properties are studied respectively. The adsorption and desorption law of polymer flooding system in reservoir and the adaptability of polymer solution to reservoir were studied experimentally and theoretically. The results show that the interaction between the hydrophobically associating polymer chains is inhibited by the influence of the modifier, and the properties of the hydrophobically associating polymer solution are also affected. The adsorption and desorption of polymer on natural oil sand is affected by the concentration of polymer, the increase of 尾 -cyclodextrin concentration, the size of oil sand and the ratio of liquid to solid. The adsorption and desorption of hydrophobically associating polymer solution on the core surface are affected by the injection rate, the concentration of polymer solution, the concentration of 尾 -cyclodextrin and the permeability of core. With the change of the intermolecular association of hydrophobic associating polymers, the compatibility of polymer aggregation size with core pore throat and the adsorption mode of polymer molecules also change. Then the dynamic retention of polymer solution is changed. With the increase of injection rate, the orientation ability of polymer molecules increases, which allows polymer molecules to enter smaller core pores and increase the dynamic retention of polymers. Changing the concentration of hydrophobic associating polymer or 尾 -cyclodextrin can change the association degree of hydrophobic associating polymer, and then improve the adaptability between hydrophobic associating polymer solution and heterogeneous reservoir, and improve the oil displacement effect of polymer.
【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】：TE357.46

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本文編號：2372684