【摘要】：為解決常規(guī)油基鉆井液低溫流變性差、低剪切速率下易形成凝膠結(jié)構(gòu)及重晶石沉降等難題,開展了低固相油基鉆井液的研究。選用3~#白油為基礎(chǔ)油,甲酸銫溶液為密度調(diào)節(jié)劑,在確定油水比的前提下,對各主處理劑進行優(yōu)選及加量確定,研制出一種低固相油基鉆井液體系,并對其抗溫、抗污染、抑制性及儲層保護效果等性能進行了評價。評價結(jié)果表明,低固相油基鉆井液體系具有良好的流變性和觸變性,抗溫達220℃,抗水污染20%,抗鉆屑污染25%,滾動回收率98.7%,滲透率恢復(fù)值90%以上。分析認(rèn)為,低固相油基鉆井液體系不僅能夠代替常規(guī)油基鉆井液應(yīng)用到強水敏地層及復(fù)雜結(jié)構(gòu)井,在裂縫性碳酸鹽及低孔低滲儲層也具有良好的應(yīng)用前景。
[Abstract]:In order to solve the problems of poor rheology at low temperature, easy formation of gel structure and barite settlement in conventional oil-based drilling fluids at low shear rate, the study of low solid phase oil-based drilling fluids was carried out. A low solid phase oil-base drilling fluid system was developed by selecting 3 # white oil as base oil and cesium formate solution as density regulator, under the premise of determining the oil-water ratio, the main treatment agent was selected and the dosage was determined, a low solid phase oil-base drilling fluid system was developed, and the oil base drilling fluid system was developed to resist temperature and pollution. The performance of inhibition and reservoir protection were evaluated. The evaluation results show that the low solid oil base drilling fluid system has good rheology and thixotropy, resistance to temperature 220 鈩，

本文編號：2154192