發(fā)布時(shí)間：2019-07-09 17:43

【摘要】：吉林油田松南中淺層勘探的目的層多數(shù)為低孔低滲類型,油層孔滲條件差,儲(chǔ)層孔喉細(xì)小,探井水平井鉆井過程中水敏水鎖損害嚴(yán)重,油藏勘探開發(fā)效率低。另外該區(qū)地層水礦化度在10000ppm-60000ppm變化,油層保護(hù)難度大,現(xiàn)場所用的KCL聚合物鉆井液體系防水鎖防水敏性能有待進(jìn)一步提高。在本文研究過程中首先通過地層礦物組分分析,對(duì)該區(qū)進(jìn)行了地層敏感性預(yù)測與評(píng)價(jià)并分析了吉林油田中淺層探井水平井儲(chǔ)層主要損害方式以及機(jī)理,即水鎖損害和水敏損害為主。第二針對(duì)吉林油田中淺層探井水平井實(shí)際,提出了鉆井液油層保護(hù)技術(shù)對(duì)策特別是防水鎖防水敏損害技術(shù)對(duì)策,形成了鉆井液防水敏防水鎖技術(shù)。第三為了降低水敏水鎖損害,本文合成了新型防水鎖劑FCS和廣譜暫堵劑GPJ,室內(nèi)實(shí)驗(yàn)評(píng)價(jià)結(jié)果表明FCS能夠有效降低油水界面張力,廣譜暫堵劑能有效抑制地層水化;并通過配伍性研究形成了KCL防水鎖防水敏鉆井液體系,室內(nèi)動(dòng)態(tài)污染實(shí)驗(yàn)評(píng)價(jià)結(jié)果表明該鉆井液體系滲透率恢復(fù)率為93.94%,有效保護(hù)了儲(chǔ)層。第四本文建立了吉林油田中淺層水平井油層保護(hù)技術(shù),形成了相應(yīng)的儲(chǔ)層損害評(píng)價(jià)方法與模型,即水鎖損害定量評(píng)價(jià)模型、水鎖損害巖心流動(dòng)實(shí)驗(yàn)評(píng)價(jià)和水敏損害CST診斷法,采用所建立方法評(píng)價(jià)結(jié)果表明形成的鉆井液體系有效減少了水敏水鎖損害。
[Abstract]:Most of the target layers in Songnan middle and shallow layer exploration in Jilin Oilfield are low porosity and low permeability, the porosity and permeability conditions of the reservoir are poor, the pore throat of the reservoir is small, the damage of water sensitive water lock is serious in the drilling process of horizontal wells, and the efficiency of reservoir exploration and development is low. In addition, the salinity of formation water in this area changes in 10000ppm-60000ppm, so it is difficult to protect the reservoir. The waterproofing locking and water sensitivity of KCL polymer drilling fluid system used in the field needs to be further improved. In the course of this study, through the analysis of formation mineral components, the formation sensitivity is predicted and evaluated, and the main damage modes and mechanisms of horizontal wells in middle and shallow exploration wells in Jilin Oilfield are analyzed, that is, water lock damage and water sensitivity damage. Secondly, according to the practice of horizontal wells in middle and shallow exploration wells in Jilin Oilfield, the technical countermeasures of drilling fluid reservoir protection, especially the technical countermeasures of waterproofing locking and water sensitive damage prevention, are put forward, and the drilling fluid waterproof sensitive and waterproofing locking technology is formed. Thirdly, in order to reduce the damage of water sensitive water lock, a new waterproof locking agent FCS and broad spectrum temporary blocking agent GPJ, were synthesized in laboratory. The results show that FCS can effectively reduce the interfacial tension between oil and water, and the broad spectrum temporary blocking agent can effectively inhibit formation hydration. The KCL waterproof lock waterproofing sensitive drilling fluid system was formed through the study of compatibility. The laboratory dynamic pollution test results show that the permeability recovery rate of the drilling fluid system is 93.94%, which effectively protects the reservoir. Fourth, the reservoir protection technology of medium and shallow horizontal wells in Jilin Oilfield is established, and the corresponding reservoir damage evaluation methods and models are formed, that is, the quantitative evaluation model of water lock damage, the experimental evaluation of water lock damage core flow and the CST diagnosis method of water sensitive damage. The evaluation results show that the drilling fluid system can effectively reduce the damage of water sensitive water lock.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TE254

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 王昌軍;王正良;羅覺生;;南海西部油田低滲透儲(chǔ)層防水鎖技術(shù)研究[J];石油天然氣學(xué)報(bào);2011年09期

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本文編號(hào)：2512320