發(fā)布時間：2017-12-30 20:29

  本文關鍵詞：頁巖氣井油層套管受力分析及應力分布計算研究　出處：《重慶科技學院》2016年碩士論文　論文類型：學位論文

  更多相關文章： 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還處于起步階段,與國外發(fā)達國家的頁巖氣勘探技術相差甚遠。水平井鉆井技術和壓裂技術是頁巖氣勘探開發(fā)的關鍵技術。頁巖氣的開采需進行大規(guī)模的、多級的壓裂,而這種高強度的壓裂施工可能會對套管損壞造成一定的影響。套管損壞嚴重,可以導致一口井的報廢,給鉆井帶來巨大的經濟損失,因此,對水平段油層套管進行受力分析,研究其管壁應力分布狀態(tài)對預防套管損壞有很重要的工程實際意義。本文在大量調研國內外相關文獻的基礎上,分別從地質因素和工程因素入手,對造成套管損壞的因素進行了詳細分析。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,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行應力計算,比對兩種理論在相同力學情況下,套管應力分布的差異。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,地層巖石性能和應力場的變化對套管應力分布的影響進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,在理論計算及有限元仿真模擬的基礎上,結合中石化西南石油工程公司所施工的永川頁巖氣M井的地質資料及油層套管設計相關數據,對可能引起的導致該井油層套管損壞的地質因素和工程因素做出一定的預測分析,并對該井的水平段油層套管設計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.

【學位授予單位】：重慶科技學院
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TE931.2

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本文編號：1356403