针对连续管钻井管内循环压耗大、钻压传递困难及黏卡几率高等难题,以卤水为基液进行室内实验,通过核心处理剂的优选,研发了无固相卤水钻井液体系,评价其性能并进行现场应用。通过对流型调节剂、抗盐降滤失剂、高效润滑剂、钻头清洁剂的优选,形成了无固相卤水钻井液体系的基本配方：卤水+（0.1%~0.2%） NaOH+（0.2%~0.4%）HT-XC+（2.0%~3.0%）YLJ-1+（0.5%~2.0%）SDNR+（1.0%~2.5%）FT-1A+（1.0%~5.0%）SD-505+复合盐密度调节剂。室内性能评价表明,该钻井液抗温150 ℃,抗钻屑污染性能较好,岩屑滚动回收率92.7%,润滑性能与全油基钻井液相近,只需在环空返速不低于0.8 m/s的前提下保证动塑比在0.5以上,就能达到井眼净化要求。将无固相卤水钻井液应用于辽河油田3口连续管侧钻井施工,其性能稳定易调整,井眼净化能力强,井径规则,机械钻速高且无任何事故。无固相卤水钻井液满足连续管钻井工艺的技术需求。图6表8参11
王晓军
,
余婧
,
孙云超
,
杨超
,
蒋立洲
,
刘畅
. 适用于连续管钻井的无固相卤水钻井液体系[J]. 石油勘探与开发, 2018
, 45(3)
: 507
-512
.
DOI: 10.11698/PED.2018.03.16
There are many problems associated with coiled tubing drilling operations, such as great circulation pressure loss inside pipe, difficulties in weight on bit (WOB) transferring, and high probability of differential sticking. Aiming at these problems, solids-free brine drilling fluid system was developed on the basis of formulation optimization with brine base fluid experiment, which was evaluated and applied to field drilling. Based on the optimization of flow pattern regulator, salt-resisting filtrate reducer, high performance lubricant and bit cleaner, the basic formula of the solids-free brine drilling fluid system was formed: brine + (0.1%-0.2%) NaOH + (0.2%-0.4%) HT-XC + (2.0%-3.0%) YLJ-1 + (0.5%-2.0%) SDNR + (1.0%-2.5%) FT-1A + (1.0%-5.0%) SD-505 + compound salt density regulator. Lab evaluation showed that the fluid had satisfactory temperature resistance (up to 150 ℃), excellent cuttings tolerance (up to 25%), and strong inhibition (92.7% cuttings recovery); Moreover, its lubrication performance was similar to that of all oil-based drilling fluid. The wellbore could be fairly cleaned at annular up-flow velocity of more than 0.8 m/s if the ratio of yield point to plastic viscosity was kept above 0.5. This fluid system has been applied in the drilling of three coiled tubing sidetracking wells in the Liaohe Oilfield, during which the system was stable and easy to adjust, resulting in excellent cuttings transportation, high ROP, regular hole size, and no down hole accidents. In summary, the solids-free brine drilling fluid system can meet the technical requirements of coiled tubing drilling.
[1] 贺会群. 连续管钻井技术与装备[J]. 石油机械, 2009, 37(7): 1-6.
HE Huiqun.Coiled tubing drilling technology and equipment[J]. China Petroleum Machinery, 2009, 37(7): 1-6.
[2] PERRY K, MALINOWSKY M, GIPSON T, et a1. CT drilling takes off in Niobrara play in Colorado and Nebraska[J]. World Oil, 2006, 227(6): 101-103.
[3] LEISING L J, NEWMAN K R.Coiled-tubing drilling[R]. SPE 24594, 1993.
[4] 赵卫红. 连续软管钻井技术[J]. 钻采工艺, 2001, 24(1): 56-59.
ZHAO Weihong.Coiled tubing drilling technology[J]. Drilling & Production Technology, 2001, 24(1): 56-59.
[5] 唐志军, 刘正中, 熊继有. 连续管钻井技术综述[J]. 天然气工业, 2005, 25(8): 73-75.
TANG Zhijun, LIU Zhengzhong, XIONG Jiyou.Summary of coiled tubing drilling technology[J]. Natural Gas Industry, 2005, 25(8): 73-75.
[6] 苏新亮, 李根生, 沈忠厚, 等. 连续油管钻井技术研究与应用进展[J]. 天然气工业, 2008, 28(8): 55-57.
SU Xinliang, LI Gensheng, SHEN Zhonghou, et al.Research of coiled tubing drilling technology and its application[J]. Natural Gas Industry, 2008, 28(8): 55-57.
[7] 陈立人, 张永泽, 龚惠娟. 连续油管钻井技术与装备的应用及其新进展[J]. 石油机械, 2006, 34(2): 59-63.
CHEN Liren, ZHANG Yongze, GONG Huijuan.Application and new progression of coiled tubing drilling technology and equipment[J]. China Petroleum Machinery, 2006, 34(2): 59-63.
[8] 张斌, 杜小勇, 杨进, 等. 无固相弱凝胶钻井液技术[J]. 钻井液与完井液, 2005, 22(5): 35-37.
ZHANG Bin, DU Xiaoyong, YANG Jin, et al.Solids-free weak gel drilling fluid technology[J]. Drilling Fluid & Completion Fluid, 2005, 22(5): 35-37.
[9] 陈乐亮. 水平井的井眼净化问题[J]. 钻井液与完井液, 1992, 9(3): 1-10.
CHEN Leliang.The problem of hole cleaning in horizontal well[J]. Drilling Fluid & Completion Fluid, 1992, 9(3): 1-10.
[10] BARATI P, KESHTKAR S, AGHAJAFARI A, 等. 问荆提取物页岩水化膨胀抑制剂性能及防膨机理[J]. 石油勘探与开发, 2016, 43(3): 476-481.
BARATI P, KESHTKAR S, AGHAJAFARI A, et al.Inhibition performance and mechanism of Horsetail extract as shale stabilizer[J]. Petroleum Exploration and Development, 2016, 43(3): 476-481.
[11] 刘兆利, 李晓明, 张建卿, 等. 无土相复合盐水钻井液的研究与应用[J]. 钻井液与完井液, 2010, 27(6): 34-37.
LIU Zhaoli, LI Xiaoming, ZHANG Jianqing, et al.Research and application of soilless composite saltwater drilling fluid[J]. Drilling Fluid & Completion Fluid, 2010, 27(6): 34-37.
