本文選題：水力壓裂 + 連續(xù)管��； 參考：《西南石油大學(xué)》2017年碩士論文

【摘要】：隨著水平井在低滲透油氣藏中的廣泛使用,以及連續(xù)管技術(shù)的快速發(fā)展,連續(xù)管壓裂技術(shù)以其靈活的拖動性和水力噴射射孔定點(diǎn)壓裂的優(yōu)越性開始被廣泛應(yīng)用于水平井壓裂中。連續(xù)管壓裂技術(shù)主要是利用高壓泵將具有較高粘度的壓裂液通過連續(xù)管或環(huán)空注入油層中,但在壓裂過程中高速通過的壓裂液會對連續(xù)管的管壁造成劇烈沖擊,導(dǎo)致連續(xù)管管壁沖蝕磨損。沖蝕磨損使得連續(xù)管管壁變薄、出現(xiàn)蝕坑以及微裂紋,在多種載荷的耦合作用下,連續(xù)管沖蝕磨損較嚴(yán)重部位易發(fā)生塑性變形、穿孔甚至斷裂失效,導(dǎo)致壓裂作業(yè)失敗甚至作業(yè)井報廢。本文針對連續(xù)管水力壓裂技術(shù)中,連續(xù)管在高速壓裂液的沖蝕磨損下容易失效的問題,查閱國內(nèi)外連續(xù)管水力壓裂技術(shù)及沖蝕磨損研究的相關(guān)文獻(xiàn),利用流體力學(xué)CFD技術(shù)對連續(xù)管水力壓裂技術(shù)中連續(xù)管管壁的沖蝕磨損進(jìn)行研究,并結(jié)合沖蝕磨損與剩余壽命關(guān)系模型,對連續(xù)管剩余服役時間進(jìn)行預(yù)測,進(jìn)而提出延長連續(xù)管使用壽命的相關(guān)建議。論文主要從以下幾個方面開展研究工作:(1)對國內(nèi)外連續(xù)管水力壓裂及沖蝕磨損研究現(xiàn)狀進(jìn)行總結(jié)歸納,提煉有利于連續(xù)管水力壓裂作業(yè)中連續(xù)管沖蝕磨損研究的相關(guān)內(nèi)容。(2)通過數(shù)值計算結(jié)果與實(shí)驗研究結(jié)果進(jìn)行對比,結(jié)合沖蝕磨損理論,建立可行的連續(xù)管沖蝕磨損數(shù)值模型。并將數(shù)值計算的連續(xù)管沖蝕磨損結(jié)果與剩余使用壽命相結(jié)合,建立用于揭示連續(xù)管沖蝕磨損規(guī)律的剩余使用壽命預(yù)測模型。(3)利用連續(xù)管沖蝕磨損數(shù)值模型,并結(jié)合剩余壽命預(yù)測模型,研究連續(xù)管水力壓裂技術(shù)中不同加砂方式下連續(xù)管的沖蝕磨損規(guī)律。旨在發(fā)現(xiàn)各參數(shù)對連續(xù)管沖蝕磨損的規(guī)律及其沖蝕磨損較嚴(yán)重部位。(4)基于流固耦合理論對連續(xù)管振動狀態(tài)下的沖蝕磨損進(jìn)行研究分析,并與未考慮耦合作用的連續(xù)管沖蝕磨損進(jìn)行簡要對比。(5)利用連續(xù)管沖蝕磨損數(shù)值模型對含缺陷的連續(xù)管沖蝕進(jìn)行研究,得出缺陷參數(shù)對連續(xù)管沖蝕磨損的規(guī)律并完成各參數(shù)的主因次分析,找出造成含缺陷連續(xù)管沖蝕加劇的主要因素。本文的研究工作,有利于揭示水力壓裂作業(yè)中連續(xù)管沖蝕磨損機(jī)理,得出不同參數(shù)及不同工作狀態(tài)對連續(xù)管沖蝕的規(guī)律并指導(dǎo)現(xiàn)場作業(yè),有效減輕水力壓裂中連續(xù)管的沖蝕磨損,并結(jié)合剩余壽命預(yù)測模型,為合理使用磨損后的連續(xù)管起到一定指導(dǎo)作用。
[Abstract]:With the wide use of horizontal wells in low permeability reservoirs and the rapid development of continuous pipe technology, continuous tube fracturing technology has been widely used in horizontal well fracturing due to its flexible traction and the advantages of hydraulic jet perforation fixed point fracturing.Causes erosion wear of the tube wall.Erosion wear makes the tube wall thinning, corrosion pits and micro-cracks appear. Under the coupling of various loads, plastic deformation, perforation and even fracture are easy to occur in the more serious erosion-wear part of the continuous pipe.The failure of fracturing operation and even the scrapping of working wells.Aiming at the problem that the continuous pipe is easy to fail under the erosion and wear of high speed fracturing fluid in the hydraulic fracturing technology of continuous pipe, the relevant literature on hydraulic fracturing technology and erosion wear of continuous pipe at home and abroad is consulted in this paper.The erosion wear of continuous pipe wall in hydrofracturing technology is studied by using hydrodynamic CFD technique. Combined with the model of the relationship between erosion wear and residual life, the remaining service time of continuous pipe is predicted.Furthermore, some suggestions for prolonging the service life of continuous pipe are put forward.In this paper, the current research situation of hydraulic fracturing and erosion wear of continuous pipes at home and abroad is summarized and summarized from the following aspects.The relevant contents of erosion wear study of continuous pipe in hydraulic fracturing are refined. The numerical model of erosion wear of continuous pipe is established by comparing the numerical results with the experimental results and combining with the theory of erosion wear.Combining the calculated erosion wear results of coiled tubes with the residual service life, a prediction model of residual service life used to reveal the law of erosion wear of coiled tubes is established, and the numerical model of erosion wear of coiled tubes is established by means of the numerical model of erosion wear of coiled tubes.Combined with the residual life prediction model, the erosion and wear rules of continuous pipe under different sand adding methods in hydraulic fracturing technology of continuous pipe are studied.The aim of this paper is to find out the law of erosion wear of coiled tube and its serious erosive wear part. (4) based on fluid-solid coupling theory, the erosion wear of continuous tube under vibration state is studied and analyzed.A brief comparison of erosion wear of coiled tubes without coupling is made. 5) A numerical model of erosion wear of coiled tubes is used to study the erosion of coiled coiled tubes.The law of erosion and wear of continuous tube by defect parameters is obtained and the principal cause of each parameter is analyzed. The main factors causing erosion of continuous tube containing defects are found out.The research work in this paper is helpful to reveal the erosion and wear mechanism of continuous pipe in hydraulic fracturing operation, to obtain the law of erosion of continuous pipe under different parameters and different working conditions, and to guide field operation.The erosion wear of the coiled pipe in hydraulic fracturing is reduced effectively and the residual life prediction model is used to guide the reasonable use of the worn coiled pipe.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TE934.2

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