【摘要】：近年來,隨著全球?qū)τ蜌赓Y源需求量的不斷增長,石油天然氣開發(fā)開采所面臨的形勢日趨復(fù)雜。尤其是在高溫、高壓、高含H2S/CO2環(huán)境中,油套管的服役工況變得更加惡劣,會引發(fā)油套管在服役過程中出現(xiàn)應(yīng)力腐蝕開裂。C110鋼作為常用的一種套管鋼,ISO15156-2和ISO11960標準并沒有將C110鋼定為抗硫鋼,同時規(guī)定：當硫化氫分壓極小且具有較高的pH值時,才能使用C110材質(zhì)。同時,若在含硫化氫環(huán)境下使用C110套管而出現(xiàn)套管環(huán)境斷裂問題,使用者需自己承擔相應(yīng)的責任。因此,對于C110套管鋼的應(yīng)力腐蝕行為研究極為重要,此研究可以為含硫化氫酸性油氣田的套管評價優(yōu)選提供一定的參考。針對這一問題本文做了如下研究： (1)對兩種套管材料(國產(chǎn)C110鋼和SMC110鋼)的常規(guī)性能(理化性能和力學性能)進行測試,得到相應(yīng)的化學成分、金相和夾雜物分析、硬度和沖擊性能以及拉伸力學性能的性質(zhì),為后續(xù)的實驗分析提供基礎(chǔ)數(shù)據(jù)。 (2)通過DCB雙懸臂梁實驗計算國產(chǎn)C110和SMC110兩種套管材料的斷裂韌性值KISSC,并且對斷口微觀組織形貌等分析,研究了其應(yīng)力腐蝕開裂機理。 (3)采用TEM(透射電鏡)對兩種套管的亞顯微結(jié)構(gòu)進行分析,從微觀機制來研究兩種套管材料的應(yīng)力腐蝕開裂。 (4)對國產(chǎn)C110和SMC110兩種套管材料在模擬工況條件下,進行高溫高壓恒載荷應(yīng)力腐蝕實驗,通過兩種材料的強度損傷、斷口分析以及表面損傷來分析研究其應(yīng)力腐蝕開裂。 (5)通過以上實驗研究,綜合分析國產(chǎn)C110套管和SMCl10套管的抗SSC(抗硫化氫應(yīng)力腐蝕開裂)性能。 研究成果為含硫氣田油層套管的選材及其適用性評估、高強度套管制造工藝水平的提高提供了重要的參考。
[Abstract]:In recent years, with the increasing global demand for oil and gas resources, the situation of oil and gas exploitation is becoming more and more complex. Especially in the environment of high temperature, high pressure and high H2S/CO2, the service condition of oil casing becomes worse. Stress corrosion cracking occurs in oil casing during service. C110 steel, as a common casing steel, is not defined as sulfur resistant steel by ISO 15156-2 and ISO11960 standards. It is also stated that when hydrogen sulfide partial pressure is very small and has a high pH value, To use the C 110 material. At the same time, if the C110 casing is used in hydrogen sulfide environment and the casing environment is broken, the user should bear the corresponding responsibility. Therefore, it is very important to study the stress corrosion behavior of C110 casing steel, which can provide a certain reference for casing evaluation and selection in acid oil and gas fields containing hydrogen sulfide. This paper has done the following research: (1) the conventional properties (physical and chemical properties and mechanical properties) of two kinds of casing materials (domestic C110 steel and SMC110 steel) have been tested, and the corresponding chemical composition, metallography and inclusion analysis have been obtained. Hardness and impact properties, as well as tensile mechanical properties, It provides basic data for subsequent experimental analysis. (2) the fracture toughness of two kinds of casing materials, C110 and SMC110, is calculated by DCB double cantilever beam experiment, and the microstructure of fracture surface is analyzed. The mechanism of stress corrosion cracking was studied. (3) the submicroscopic structure of two kinds of casing was analyzed by TEM (Transmission Electron microscope). The stress corrosion cracking of two kinds of casing materials is studied from the microscopic mechanism. (4) the stress corrosion experiments of two kinds of casing materials, C110 and SMC110, under simulated working conditions, are carried out under high temperature and high pressure under constant load, and the strength damage of the two materials is obtained. Fracture analysis and surface damage are used to study the stress corrosion cracking of C110 casing and SMCl10 casing. (5) the SSC (hydrogen sulfide stress corrosion cracking) resistance of domestic C110 casing and SMCl10 casing is comprehensively analyzed. The research results provide an important reference for the selection of casing material and its applicability evaluation, and the improvement of manufacturing technology level of high strength casing in sulfur-bearing gas field.
【學位授予單位】：西南石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE983

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相關(guān)期刊論文 前10條

1 孫永興;林元華;何龍;李天雷;施太和;劉婉穎;;酸性油氣田油套管選材設(shè)計[J];腐蝕科學與防護技術(shù);2011年01期

2 王選奎,黃雪松,陳普信,胡慶祥,郭學輝,鄭家q，

本文編號：2181059