本文選題：煤儲層　切入點：低密度鉆井液　出處：《煤炭科學(xué)技術(shù)》2017年09期 　論文類型：期刊論文

【摘要】：為了解決沁南示范區(qū)煤儲層井壁易坍塌、鉆井液易污染煤儲層等難題,通過室內(nèi)試驗,對超低滲透鉆井液處理劑和潤滑劑進行了優(yōu)選及評價,研選出超低滲透處理劑DL-1和環(huán)保型潤滑劑SD-302:膨潤土基漿中加入質(zhì)量分數(shù)為2%的DL-1,在120℃老化16 h,煤粉床侵入深度7.33 cm,DL-1處理劑的主要性能優(yōu)于國外同類產(chǎn)品;潤滑劑SD-302在常用質(zhì)量分數(shù)范圍內(nèi)(1%~3%),摩擦因數(shù)降低率在72.4%~87.7%。基于DL-1和SD-302,提出了中空玻璃微球低密度鉆井液新配方。相對于原配方,改進的鉆井液配方的潤滑系數(shù)更低,為0.041,有利于降低定向井及水平井鉆進過程中的阻卡或卡鉆現(xiàn)象。新配方對不同滲透性儲層的封堵效果更好,具有良好的防塌性能和保護儲層作用。應(yīng)用改進的中空玻璃微球鉆井液在沁南示范區(qū)進行了2口定向井的現(xiàn)場試驗,防漏失效果明顯,防塌性能好,保證了鉆井施工的順利進行。
[Abstract]:In order to solve the problems of coal reservoir wall collapsing and drilling fluid contaminating coal reservoir in Qinnan demonstration area, the treatment agent and lubricant of ultra-low permeability drilling fluid were selected and evaluated through laboratory tests. Ultra low permeability agent DL-1 and environmental protection lubricant SD-302: bentonite base slurry were selected to add DL-1 with a mass fraction of 2%. After aging at 120 鈩，

本文編號：1579897