【摘要】：彰武地區(qū)勘探初期鉆井速度慢、鉆井周期長、復(fù)雜狀況頻發(fā),嚴(yán)重制約著該地區(qū)的油氣的勘探開發(fā)。本文在調(diào)研國內(nèi)外文獻(xiàn)提高鉆井速度的基礎(chǔ)上,結(jié)合彰武地區(qū)鉆井的實(shí)際情況,提出通過優(yōu)化鉆井液體系及優(yōu)化鉆頭、動力組合提高機(jī)械鉆速。 提高鉆速最顯著的途徑是公共優(yōu)化鉆具組合,主要是通過對比各個層位的鉆頭及螺桿使用情況,優(yōu)選出每個層位使用情況較好的鉆頭、螺桿組合。而本文主要是通過優(yōu)化鉆井液體系提高機(jī)械鉆速。 鉆井液提高鉆井速度主要是通過減少非生產(chǎn)時間及井下復(fù)雜情況的發(fā)生。彰武地區(qū)上部地層黏土含量高,易造漿、掉塊、坍塌。因此優(yōu)選了三種抑制性較好的鉆井液體系備選,即鉀銨基聚合物鉆井液體系、水包油鉆井液體系、低密度有機(jī)鹽鉆井液體系。結(jié)合彰武地區(qū)鉆井實(shí)際情況最終選用了鉀銨基聚合物鉆井液體系。 對鉀銨基聚合物鉆井液體系進(jìn)一步優(yōu)化,并運(yùn)用巖屑滾動回收實(shí)驗(yàn)、線性膨脹實(shí)驗(yàn)、流變性實(shí)驗(yàn)、絮凝實(shí)驗(yàn)、常溫常壓失水實(shí)驗(yàn)等多種方法對主要處理劑進(jìn)行篩選評價。最終得出優(yōu)化后的鉀銨基聚合物鉆井液體系為：4%膨潤上+5%Na2CO3+0.4%KPAM+1.5%NH4HPAN+3%FT-99+2%HA樹脂+0.5%PB-1。 室內(nèi)實(shí)驗(yàn)和現(xiàn)場應(yīng)用表明,該體系具有優(yōu)異的性能,不僅具有很強(qiáng)的抑制性,還具有良好的流變性能,能夠有效的減少劃眼等非生產(chǎn)時間并能夠減少井下復(fù)雜情況的發(fā)生,節(jié)約鉆時,降低鉆井總成本。
[Abstract]:The exploration and development of oil and gas in Zhangwu area is seriously restricted by its slow drilling speed, long drilling period and frequent complex conditions. On the basis of investigation and investigation of domestic and foreign literatures to improve drilling speed, combined with the actual situation of drilling in Zhangwu area, this paper puts forward that the mechanical drilling speed can be improved by optimizing drilling fluid system and optimizing drill bit. The most significant way to improve drilling speed is to optimize the combination of drill tools, mainly by comparing the use of drill bits and screws in each layer, and selecting the best bit and screw combination of each layer. In this paper, the drilling speed is improved by optimizing drilling fluid system. Drilling fluid improves drilling speed mainly by reducing non-production time and complex downhole conditions. Zhangwu area upper layer clay content is high, easy to make slurry, fall, collapse. Therefore, three kinds of drilling fluid system with good inhibition, namely potassium ammonium polymer drilling fluid system, water in oil drilling fluid system and low density organic salt drilling fluid system, were selected. Combined with the actual drilling conditions in Zhangwu area, potassium ammonium polymer drilling fluid system was finally selected. The potassium ammonium based polymer drilling fluid system was further optimized, and the main treatment agents were screened and evaluated by several methods, such as cuttings rolling recovery experiment, linear expansion test, rheological experiment, flocculation experiment, water loss test at room temperature and atmospheric pressure, etc. Finally, the optimized potassium ammonium polymer drilling fluid system was obtained as follows: 5%Na2CO3 0.4%KPAM 1.5%NH4HPAN 3%FT-99 2%HA resin 0.5 and PB-1 on 4% swelling. Laboratory experiments and field applications show that the system has excellent performance, not only has very strong inhibition, but also has good rheological performance, can effectively reduce the non-production time, such as scratching, and can reduce the occurrence of complex downhole conditions. Save drilling time, reduce the total cost of drilling.
【學(xué)位授予單位】：西南石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE254

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