本文關(guān)鍵詞：頁巖氣井油層套管受力分析及應(yīng)力分布計(jì)算研究　出處：《重慶科技學(xué)院》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 套管損壞 壓裂 仿真模擬 套管偏心

【摘要】：頁巖氣是未來石油資源的理想接替能源。然而,我國的頁巖氣勘探技術(shù)還處于起步階段,與國外發(fā)達(dá)國家的頁巖氣勘探技術(shù)相差甚遠(yuǎn)。水平井鉆井技術(shù)和壓裂技術(shù)是頁巖氣勘探開發(fā)的關(guān)鍵技術(shù)。頁巖氣的開采需進(jìn)行大規(guī)模的、多級的壓裂,而這種高強(qiáng)度的壓裂施工可能會對套管損壞造成一定的影響。套管損壞嚴(yán)重,可以導(dǎo)致一口井的報(bào)廢,給鉆井帶來巨大的經(jīng)濟(jì)損失,因此,對水平段油層套管進(jìn)行受力分析,研究其管壁應(yīng)力分布狀態(tài)對預(yù)防套管損壞有很重要的工程實(shí)際意義。本文在大量調(diào)研國內(nèi)外相關(guān)文獻(xiàn)的基礎(chǔ)上,分別從地質(zhì)因素和工程因素入手,對造成套管損壞的因素進(jìn)行了詳細(xì)分析。此外,專門針對頁巖氣井后期的儲層改造措施對套管損壞的影響作了一定的調(diào)研分析。鑒于上述對套管損壞因素的分析,本文首先針對頁巖氣井油層套管壁厚較大的特點(diǎn),分別采用厚壁圓筒和薄壁圓筒理論模型,對頁巖氣井水平段油層套管進(jìn)行受力分析,然后對焦石壩地區(qū)幾口頁巖氣井水平段油層套管進(jìn)行應(yīng)力計(jì)算,比對兩種理論在相同力學(xué)情況下,套管應(yīng)力分布的差異。其次,借助ANSYS Workbench有限元分析軟件,建立地層—水泥環(huán)—套管有限元分析模型,針對頁巖氣井后期壓裂過程中,地層巖石性能和應(yīng)力場的變化對套管應(yīng)力分布的影響進(jìn)行了有限元仿真模擬,分析其對套管損壞程度的影響;同時,對水平段油層套管偏心問題作了一定的分析,仿真模擬了其對套管應(yīng)力分布的影響,然后分析其對套管損壞程度的影響。最后,在理論計(jì)算及有限元仿真模擬的基礎(chǔ)上,結(jié)合中石化西南石油工程公司所施工的永川頁巖氣M井的地質(zhì)資料及油層套管設(shè)計(jì)相關(guān)數(shù)據(jù),對可能引起的導(dǎo)致該井油層套管損壞的地質(zhì)因素和工程因素做出一定的預(yù)測分析,并對該井的水平段油層套管設(shè)計(jì)提出了一定的參考意見。
[Abstract]:Shale gas is the ideal alternative energy for future petroleum resources. However, shale gas exploration technology in China is still in the initial stage, and a far cry from the shale gas exploration technology in developed countries. Horizontal drilling techniques and fracturing technology is a key technology for shale gas exploration and development of shale gas exploitation. The need for large-scale, multi the fracturing and fracturing of the high strength may cause a certain impact on the casing damage. The casing damage is serious, can lead to scrap a well drilling, to bring huge economic losses, therefore, the force analysis of the horizontal section of the casing, on the pipe wall stress distribution is very important practical significance for the prevention of casing damage. Based on a large amount of research on the related literature, starting from geological factors and engineering factors, the factors causing casing damage in detail Analysis. In addition, specifically for shale gas reservoirs later made some analysis of the research on influence of casing damage. In view of the above factors on casing damage analysis, aiming at the shale gas well casing wall thickness larger features respectively using thick walled cylinder and cylinder model, the force analysis of the shale gas well casing on the horizontal section, then coke dam area wells horizontal section casing stress calculation, comparison of two theories in the same mechanical condition, the stress distribution of the casing. Secondly, using ANSYS finite element analysis software Workbench, establish the stratum cement casing finite element analysis model in the late, shale gas well fracturing process, rock properties and stress field changes impact on the stress distribution of casing were analyzed by finite element simulation, the analysis of casing The influence of damage; at the same time, in the horizontal section of casing eccentricity is analysed and simulated the stress distribution of the casing, and then analyzes its influence on casing damage degree. Finally, simulation based on theoretical calculation and finite element simulation, the design data of geological data and casing Yongchuan shale gas well M with Sinopec Southwest Petroleum Engineering Company in the construction, make some analysis of the prediction of likely caused by geological factors of the well casing damage and engineering factors, and puts forward some reference opinions on casing design of horizontal section of this well.

【學(xué)位授予單位】：重慶科技學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TE931.2

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本文編號：1356403