本文關(guān)鍵詞：大慶油田取換套防鈣侵修井液體系研究　出處：《東北石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 大慶油田 套損 取換套 修井液 鈣侵

【摘要】：大慶油田開發(fā)展進程表明,隨著大慶油田的深度開采,工程因素和地質(zhì)因素的共同作用,大慶油水井套管出現(xiàn)不同程度、不同形態(tài)的損壞,由于長垣內(nèi)部油層距離嫩二段近,長期生產(chǎn)、固井質(zhì)量、存在斷層等問題易造成部分油水井嫩二段套損,現(xiàn)已形成喇7-30和南一區(qū)西部復(fù)雜成片套損區(qū)。針對嚴重的套損情況,取換套施工井逐年增加,并且取換套是唯一能夠滿足重建油水井井身結(jié)構(gòu)的修井工藝。但取套施工過程存在,套銑造漿快的大段泥巖的地層時,修井液粘度和切力急劇升高;套銑擴眼和鉆塞時,水泥侵加重,造成修井液粘度和切力升高加快,鈣侵嚴重時需調(diào)配或更換修井液,造成修井液的流失,延長了施工周期的問題。本文在調(diào)研分析取套施工工程地質(zhì)特征的基礎(chǔ)上,通過大量的室內(nèi)實驗,合理調(diào)整修井液配方,對取換套防鈣侵修井液體系進行系統(tǒng)研究。研究結(jié)果表明,新型修井液體系,在抑制包被能力、抗鈣侵能力、降濾失性和抗污染能力等方面都有顯著提高。可以很好的解決取套施工過程中修井液鈣侵、井壁失穩(wěn)、減少阻卡等問題,降低復(fù)雜情況及事故發(fā)生率,為大慶油田取換套施工提供了很好的技術(shù)保障。
[Abstract]:The development process of Daqing Oilfield shows that with the deep exploitation of Daqing Oilfield, the joint action of engineering and geological factors, the casing of Daqing oil-water well appears different degrees and different forms of damage. Due to the long term production, the quality of cementing and the existence of faults, the inner reservoir of the Placanticline is close to the second stage of the Nen formation, which can easily cause the casing damage of the second stage of the oil and water wells. The complex casing damage area has been formed in La 7-30 and the western part of South one area. In view of the serious casing damage situation, the number of casing replacement wells is increasing year by year. And changing the casing is the only workover technology which can meet the needs of rebuilding the wellbore structure of oil and water wells, but the viscosity and shear force of the workover fluid increase sharply when the casing takes place in the process of casing extraction and the formation of large mudstone with quick casing milling and slurry making. When casing milling reaming and drilling plug, cement invasion is aggravated, which results in the increase of viscosity and shear force of workover fluid. When calcium invasion is serious, the workover fluid needs to be adjusted or replaced, resulting in the loss of workover fluid. On the basis of investigation and analysis of the geological characteristics of jacketed construction engineering, through a large number of laboratory experiments, the formula of workover fluid is adjusted reasonably. The research results show that the new workover fluid system can restrain the coating ability and resist the calcium invasion ability. It can solve the problems such as calcium invasion of workover fluid, instability of shaft wall, reduction of blocking and so on, and reduce the incidence of complex situations and accidents. It provides a good technical guarantee for Daqing Oilfield.
【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】：2015
【分類號】：TE358

【參考文獻】

相關(guān)期刊論文 前1條

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本文編號：1387863