本文關(guān)鍵詞： 井壁穩(wěn)定 納微米封堵 防塌鉆井液 硬脆性泥巖　出處：《油田化學(xué)》2017年03期 　論文類型：期刊論文

【摘要】：為了解決南堡深層泥頁巖因納微米級孔縫發(fā)育而易發(fā)生井壁失穩(wěn)的問題,通過對納微米級封堵材料的優(yōu)選,確定了配方為3%膨潤土漿+1.2%增黏劑DSP-2+6%降濾失劑SPNH+3%降濾失劑SMP-I+1%降黏劑SMT+0.5%聚胺抑制劑AI-1+0.8%熱穩(wěn)定劑Na_2SO_3+1%微米封堵劑FT3000+5%抑制劑KCl+2%防水鎖劑HAR-D+2%納米封堵劑HSM+3%亞微米固壁劑HGW的納微米防塌鉆井液體系,研究了該鉆井液體系的濾失性、封堵性以及防塌抑制性等性能。結(jié)果表明,2%納米級膠束封堵劑HSM與3%亞微米級固壁劑HGW復(fù)配使用可使基漿的膜效率從0.21提高到0.38,使納微米級濾膜的濾失量降低35%以上,同時能降低PPT濾失量和初始濾失速率,大幅度減緩了對泥頁巖的壓力傳遞時間。該鉆井液體系具有良好的降濾失性、封堵性和抑制性,在150℃下老化16 h后的API濾失量和HTHP濾失量分別為3.7 mL和11 mL,膨潤土壓片在該鉆井液中的24 h線性膨脹率僅為13.29%,泥巖巖屑在該鉆井液中150℃下熱滾16 h后的回收率高達(dá)93.3%。該體系在南堡油田礦場試驗中取得了顯著效果,井眼質(zhì)量得到有效改善,未發(fā)生垮塌、掉塊等井壁失穩(wěn)情況,機械鉆速較鄰井提高了35.29%,實現(xiàn)了深層泥頁巖的井壁穩(wěn)定與優(yōu)快鉆井的多重目的。
[Abstract]:In order to solve the problem that Nanbao deep shale is prone to wellbore instability due to the development of nanometer-sized pore fractures, the optimal selection of nanometer-sized plugging materials is carried out. The formulation of 3% bentonite slurry 1.2% tackifier DSP-2 6% filtration reducer SPNH 3% filtration reducer SMP-I 1% viscosity reducer SMT 0.5% polyamine inhibitor AI-1 0.8% heat stabilizer Na_2SO_3 1% micron plugging agent FT3000 5% inhibitor KCl 2% waterproof lock agent HAR-D 2% waterproofing agent HAR-D 2% was determined. Nano-micron anti-sloughing drilling fluid system of HSM 3% sub-micron wall fixing agent HGW, The filtration properties of the drilling fluid system are studied. The results show that the combination of 2% HSM and 3% submicron HGW can increase the membrane efficiency of the slurry from 0.21 to 0.38, and reduce the filtration capacity of nanometer-sized filter membrane by more than 35%. At the same time, the PPT loss and initial filtration rate can be reduced, and the pressure transfer time to shale is greatly reduced. The drilling fluid system has good filtration reduction, plugging and inhibition. After aging at 150 鈩，

本文編號：1505865