本文選題：固井 + 注替過作業(yè)��； 參考：《重慶科技學(xué)院》2015年碩士論文

【摘要】：固井作業(yè)是石油天然氣鉆井工程的重要組成部分，雖然固井作業(yè)周期短，但是依然存在溢流、井噴事故風(fēng)險。做好對溢流的監(jiān)測，實現(xiàn)“早發(fā)現(xiàn)、早關(guān)井”是做好二級井控、預(yù)防井噴失控事故的關(guān)鍵。 通過現(xiàn)場調(diào)研發(fā)現(xiàn)固井注替作業(yè)中溢流監(jiān)測存在返漿中的混漿缺少監(jiān)測手段、數(shù)據(jù)采集困難等問題。通過分析固井注替過程井底壓力變化，得到由于井內(nèi)存在多種流體，可能導(dǎo)致真空段的產(chǎn)生，從而干擾對溢流判斷。 本課題在基于不改變鉆井現(xiàn)場設(shè)備和工藝的前提下，提出固井溢流液位監(jiān)測和流量監(jiān)測兩種方案；對于尾管固井流量監(jiān)測，為了能使用電磁流量計，考慮對返漿出口導(dǎo)管進行滿管流改造；對于液位監(jiān)測方法，考慮增加儲液罐，再用超聲波液位計監(jiān)測混漿的排量。在本課題采用SCW無線傳輸系統(tǒng)來接收監(jiān)測設(shè)備的數(shù)據(jù)，，提高數(shù)據(jù)采集的實時性和準(zhǔn)確性。本課題建立井底壓力平衡模型計算分析井下是否發(fā)生真空段，以及真空段發(fā)生的時間、真空段體積以及返漿的理論排量，通過和監(jiān)測數(shù)值進行對比來判斷是否發(fā)生溢流。通過現(xiàn)場試用固井溢流監(jiān)測方案，結(jié)果表明改進固井溢流監(jiān)測系統(tǒng)能具有實際可操作性，能有效的解決固井溢流監(jiān)測的難題。
[Abstract]:Cementing is an important part of oil and gas drilling engineering. Although the cementing period is short, there is still the risk of overflow and blowout accidents. Monitoring the overflow and realizing "early detection and early shutoff" are the keys to do a good job of secondary well control and prevent blowout out of control. Through field investigation, it is found that there are some problems in overflow monitoring in cementing injection replacement operation, such as the lack of monitoring means in slurry return and the difficulty of data acquisition, etc. By analyzing the change of bottom hole pressure in cementing process, it is found that there are many fluids in the well, which may lead to the production of vacuum section and interfere with the judgment of overflow. Based on the condition that the drilling equipment and technology are not changed, two schemes of cementing overflow level monitoring and flow monitoring are put forward in this paper, and for the flow monitoring of tailpipe fixed wells, in order to be able to use electromagnetic Flowmeter, For the liquid level monitoring method, consideration should be given to increasing the liquid storage tank and using the ultrasonic liquid level meter to monitor the slurry discharge. In this paper, the SCW wireless transmission system is used to receive the data of the monitoring equipment to improve the real-time and accuracy of data acquisition. In this paper, the bottom hole pressure balance model is established to calculate and analyze whether the vacuum section occurs, the time, volume and theoretical discharge of the vacuum section, and to judge whether the overflow occurs or not by comparing with the monitoring value. The results show that the improved cementing overflow monitoring system can be operated in practice and can effectively solve the problem of cementing overflow monitoring.
【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】：2015
【分類號】：TE256

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本文編號：1924745