碳酸鹽巖油藏通常是裂縫性、油濕性的,是所含原油儲(chǔ)量最高(超過(guò)60%)的油藏類型。在過(guò)去的十?dāng)?shù)年間,由于低鹽度水驅(qū)相較其他提高采收率技術(shù)具有經(jīng)濟(jì)低廉、生態(tài)友好等特征,其被認(rèn)為是一種逐漸發(fā)展起來(lái)的二采或三采階段的提高采收率技術(shù)。不幸的是,LSWF本質(zhì)上仍然是一個(gè)模糊的概念,其關(guān)鍵機(jī)理雖然經(jīng)過(guò)了激烈的爭(zhēng)論和試驗(yàn),但仍然沒(méi)有得到普遍認(rèn)同。更有趣的事實(shí)是,與砂巖油藏相比,人們對(duì)低鹽度水驅(qū)在碳酸鹽巖油藏中的作用的明確機(jī)理的研究較少,甚至不太了解。本文的目的是提出一個(gè)實(shí)驗(yàn)設(shè)計(jì),以實(shí)驗(yàn)尺度下評(píng)估低鹽度水驅(qū)在碳酸鹽巖地層的有效性。明確限定了使用人造碳酸鹽巖巖心和切片進(jìn)行巖心驅(qū)油和接觸角測(cè)量實(shí)驗(yàn)。此外,本研究?jī)H限于用將地層水稀釋得到的一系列鹽水來(lái)確定最佳鹽度,并試圖指出低鹽度水驅(qū)效應(yīng)背后的基本機(jī)理。本研究共進(jìn)行了18次實(shí)驗(yàn),包括12次巖心驅(qū)油和6次接觸角測(cè)量實(shí)驗(yàn)。此外,本研究還用了來(lái)自中東碳酸鹽巖儲(chǔ)層的死原油樣品和八種合成鹽水(FW、2FW、10FW、20FW、50FW、100FW、200FW和500FW)和一種蒸餾水。巖心驅(qū)油實(shí)驗(yàn)旨在通過(guò)評(píng)價(jià)采收率的增加值來(lái)評(píng)價(jià)碳酸鹽巖中低鹽度水驅(qū)的有效性,并試圖通過(guò)油...

【文章頁(yè)數(shù)】：80 頁(yè)

【學(xué)位級(jí)別】：碩士

【文章目錄】：
摘要
ABSTRACT
Chapter1 Introduction
    1.1 Research Background
    1.2 Problem Statement
    1.3 Motivation and Significance of the Study
    1.4 Research Objectives
        1.4.1 General Objectives
    1.5 Scope,Limitations and Implications of the Study
Chapter2 Literature Review
    2.1 Overview of Crude Oil/Brine/Rock(COBR)System
    2.2 Influence of Temperature,Surfactants and Potential Determining Ions(PDIs)on LSWF Effect
    2.3 Influence of Brine Dilution(Lessening the Ionic strength/Salinity)on LSWF Effect
    2.4 Influence of Carbonate Rock Type and Mineralogy on LSWF Effect
    2.5 Proposed LSWF Mechanisms on Carbonate Rocks
Chapter3 Experimental Materials
    3.1Cores
    3.2 Core Cleaning,Preparation and Handling Procedure
    3.3 Core plug Properties
    3.4 Crude Oil
    3.5 Brine Solutions
Chapter4 Methodology
    4.1 Core Flooding Experiments
        4.1.1 Core Flooding Experimental Setup
        4.1.2 Core Flooding Experimental Procedure
    4.2 Oil/Water Relative Permeability Measurements
    4.3 Contact Angle Measurements
        4.3.1 Contact Angle Measurement Setup
        4.3.2 Contact Angle Measurement Procedure
Chapter5 Results and Discussion
    5.1 Core Flooding Experimental Results
    5.2 Contact Angle Measurements Results
Chapter6 Conclusion and Recommendations
REFERENCES
ACKNOWLEDGEMENT



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