【摘要】：深水鉆井壓井是處理深水鉆井過程中發(fā)生井涌溢流后必要的井控手段，主要有深水司鉆法和深水工程師法兩種常規(guī)方法。深水壓井與陸地壓井具有相似的工藝原理，但由于兩者不同的井筒結構、防噴器位置、節(jié)流管線長度、氣體上升規(guī)律及環(huán)境溫度等，深水鉆井壓井具有與陸地不同的控制規(guī)律。本文系統(tǒng)的研究了因深水特殊性而導致的各種壓井規(guī)律的不同，建立了最符合實際情況的深水壓井控制模型，可以更準確的指導壓井施工，降低井控風險。 本文在總結了常規(guī)陸地司鉆法、工程師法壓井工藝流程及壓力控制規(guī)律的基礎上，針對深水鉆井壓井面臨的長節(jié)流管線、井內溫度分布和氣體壓縮性等特點，建立了深水鉆井壓井控制模型。詳細推導了發(fā)生氣侵時井內各時刻相關參數的計算方程。 將建立的深水壓井模型與常規(guī)陸地壓井模型進行對比分析，找到兩者控制規(guī)律的不同，得出深水鉆井壓井比常規(guī)陸地壓井的控制難度更大，施工需要更為精細和準確的井口壓力控制，尤其是對施工時間和立壓的掌控等結論。 計算分析了深水鉆井壓井的各相關因素對壓井控制與過程的影響，利用圖表的形式呈現了各參數變化的關系曲線，得出了小排量壓井，，大內徑節(jié)流管線以及較小的溢流量和井底壓差更有利于井口壓力控制等結論和認識。
[Abstract]:Deep-water drilling and drilling is a necessary well control method to deal with wellbore overflow in deep water drilling process. There are two conventional methods: deep-water drilling-drilling method and deep-water engineer method. Deep water well killing has the similar technology principle as land well, but because of their different wellbore structure, blowout preventer position, throttle pipe length, gas rising law and ambient temperature, deep water drilling and well killing have different control laws compared with land. In this paper, we systematically study the differences of various kinds of well killing laws caused by the particularity of deep water, and set up the control model of deep water well which is most suitable for the actual situation, which can guide the well killing operation more accurately and reduce the risk of well control. On the basis of summing up the conventional land drilling-method, the engineer method and the pressure control rules, this paper aims at the characteristics of the long throttling pipeline, the temperature distribution and the gas compressibility of the deep water drilling and killing well. A control model for deep water drilling is established. The calculation equations of the relevant parameters at each time in the well during gas invasion are derived in detail. By comparing and analyzing the deep water well killing model and the conventional land well killing model, we find out the difference between the two control laws, and draw the conclusion that the control of deep water well killing is more difficult than that of conventional land well killing. Construction requires more precise and accurate wellhead pressure control, especially the control of construction time and vertical pressure. This paper calculates and analyzes the influence of the relevant factors of deep water drilling and well killing on the control and process of well killing, presents the relation curve of each parameter change by using the form of chart, and obtains the small displacement well killing. Large diameter throttling pipeline, small overflow flow and bottom hole pressure difference are more favorable for wellhead pressure control and so on.
【學位授予單位】：重慶科技學院
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE28

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