本文選題：SAGD + 修井作業(yè)��； 參考：《東北石油大學》2015年碩士論文

【摘要】：近年來,SAGD采油技術(shù)作為一項新興技術(shù),在我國超稠油開采中起到日益重要的作用。隨著SAGD井組的不斷增加,SAGD油井修井作業(yè)技術(shù)也日趨成熟。但受SAGD油井特殊的井口環(huán)境和井身結(jié)構(gòu)影響,仍有許多技術(shù)問題需要解決。主要表現(xiàn)在:(1)大部分SAGD油井在雙管作業(yè)井控技術(shù)方面,仍然沿用直井的井控技術(shù),施工作業(yè)過程中,由于井口結(jié)構(gòu)復雜、井內(nèi)管柱配置特殊、井筒溫度較高、井底壓差變化較大,地面井控設(shè)施和井控技術(shù)相對落后,存在井筒報廢、井噴失控等重大安全隱患。(2)由于SAGD油井壓差大,修井作業(yè)前壓井次數(shù)頻繁,現(xiàn)階段SAGD油井大量使用的壓井液體系在油層相對較高的鹽水礦化度(10g/L以上)和較高溫度(高于70℃)的條件下,穩(wěn)定性變得非常差,嚴重地影響到壓井效果,對油層也有很大傷害。(3)在SAGD油井進行堵漏施工中會遇到各種復雜地質(zhì)情況,若現(xiàn)場使用的防漏劑性能不好,不但會影響油井生產(chǎn)效率,甚至還會使后續(xù)修井作業(yè)施工無法進行下去等問題發(fā)生。(4)現(xiàn)階段的SAGD油井的修井作業(yè)大部分工作需要人工操作,工人工作量大,安全系數(shù)低,其中一個非常繁重的工作就是起下油管、抽油桿及井下工具。不僅要求才作業(yè)人員精力高度集中,動作配合靈活準確,而且操作頻繁,安全隱患較多,危險性大,非常容易造成井口人員的人身傷害。為解決上述問題,開展了SAGD油井作業(yè)技術(shù)的研究,其中包括SAGD油井雙管作業(yè)防噴器的研制、SAGD油井油層保護技術(shù)研究、SAGD油井高溫防漏技術(shù)研究和SAGD油井井口管桿機械化移運系統(tǒng)的研制,通過運用這些技術(shù)來提高SAGD油井修井作業(yè)技術(shù)含量、降低井控風險,保護油層,保證壓井效果,減少修井作業(yè)過程中給油層帶來的傷害,杜絕井下作業(yè)事故發(fā)生,降低工人勞動強度,避免在施工中造成人身傷害。
[Abstract]:In recent years, SAGD oil recovery technology, as a new technology, plays an increasingly important role in the production of super heavy oil in China. With the increasing of SAGD well group, the workover operation technology of SAGD well is maturing day by day. However, due to the special wellhead environment and wellbore structure of SAGD well, there are still many technical problems to be solved. Most SAGD wells still use the well control technology of straight wells in the aspect of dual pipe operation. In the course of operation, due to the complex wellhead structure, the special pipe string arrangement in the well, and the higher wellbore temperature, The bottom hole pressure difference varies greatly, the surface well control facilities and well control technology are relatively backward, and there is a major safety hazard, such as wellbore abandonment, blowout out of control, etc.) because of the large pressure difference in SAGD well, the times of well killing before workover operation are frequent. At present, under the conditions of relatively high salinity (> 10g / L) and higher temperature (higher than 70 鈩，

本文編號：1944310