【摘要】：分支井技術(shù)是目前世界石油界公認(rèn)的提高油氣井產(chǎn)量的鉆完井重要技術(shù)手段。國際上按照完井的難易程度將分支井技術(shù)系統(tǒng)共分為六個(gè)級別,其中四級以下系統(tǒng)應(yīng)用的比較廣泛,分支窗口處普遍采用水泥固井,其密封性達(dá)不到高溫高壓井及稠油熱采的開采,而六級系統(tǒng)因其技術(shù)不成熟、成本高,鮮有應(yīng)用。以遼河油田為例,稠油及難動(dòng)用儲(chǔ)量占總量的70%以上,亟待開發(fā)完善分支井系統(tǒng)來滿足生產(chǎn)需要。本文采用有限元分析和地面試驗(yàn)驗(yàn)證的方法,優(yōu)選出一種屈服強(qiáng)度達(dá)到450MPa且具有良好塑性的雙相鋼作為分叉裝置的加工材料,其可滿足打壓大于20MPa且膨脹30%的技術(shù)要求。根據(jù)福貝爾公式,考慮到安全系數(shù)和焊接的焊縫效應(yīng)及壓制變性后井下液壓恢復(fù)形狀回復(fù)角不足情況,確定了六級分支井分叉裝置的壁厚8mm及主分支直徑133mm壓制管并進(jìn)行六級分支井分叉裝置機(jī)械、密封耐壓等探索性試驗(yàn),為高級別分支井的研發(fā)提供借鑒意義。改進(jìn)的四級分支井密封方式,解決了四級分支井無法有效密封的問題;造斜器防轉(zhuǎn)工具的設(shè)計(jì)研制消除了管柱在作業(yè)中轉(zhuǎn)動(dòng)的風(fēng)險(xiǎn):一趟鉆沖洗式空心導(dǎo)斜器相關(guān)工具的配套研制,簡化了施工工藝,拓展了其應(yīng)用范圍。
[Abstract]:Branching well technology is recognized as an important means of drilling and completion in oil and gas wells in the world. According to the degree of difficulty and ease of completion, the branch well technical system is divided into six levels in the world, in which the system below four levels is widely used, and cement cementing is widely used in branch windows. Its sealing performance is not up to the exploitation of high temperature and high pressure wells and heavy oil thermal recovery, but the sixth stage system is seldom applied because of its immature technology and high cost. Taking Liaohe Oilfield as an example, heavy oil and hard to produce reserves account for more than 70% of the total, so it is urgent to develop and perfect the branching well system to meet the production needs. By means of finite element analysis and ground test, a kind of duplex steel with yield strength of 450MPa and good plasticity is selected as the processing material of the bifurcation device. It can meet the technical requirements of compaction greater than 20MPa and expansion of 30%. According to Faubert's formula, considering the safety factor, weld effect of welding and insufficient recovery angle of hydraulic recovery shape after pressing denaturation, The wall thickness 8mm and the main branch diameter 133mm pressing tube of the six grade branching well bifurcation device are determined and the exploratory tests of the six grade branch well bifurcation mechanism and seal pressure resistance are carried out, which provide a reference for the research and development of the high grade branch well. The improved four grade branch well sealing method solves the problem that the fourth grade branch well can not be effectively sealed; The design and development of the anti-rotation tool for the clinker eliminates the risk of the string rotation in the operation. The development of the related tools of the one-pass drill flushing hollow deflector simplifies the construction technology and expands its application range.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TE933.1

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