聚胺仿油基钻井液技术研究及在川西地区的应用

发布时间：2018-11-16 11:17

【摘要】：在川西地区钻探开发时,马井、孝泉构造由于其中浅层富含极易水化膨胀和分散的棕红(褐)泥岩,自然造浆情况严重,易进一步引起井壁坍塌、缩径等稳定性问题,增加起下钻摩阻和扭矩,甚至引起遇阻卡钻等复杂情况或事故。通过统计该地区前期施工情况表明：现有水基钻井液体系难以完全满足川西地层水平井施工需要,表现出较多复杂情况,特别是地层井壁失稳,斜井段、水平段摩阻大等复杂问题。为此,本文针对川西地层特点和钻井液技术难度,在充分调研国内外聚胺仿油基钻井液体系现状的基础上,对聚胺仿油基钻井液体系处理剂优选、体系性能评价优化和矿场应用进行了全面深入地研究：(1)通过川西地区地质情况研究,分析该地区地层特点、钻井液体系难点及施工难度,综合该地区前期钻井液复杂情况表明目前川西地区所使用的水基钻井液体系难以满足钻探开发要求。(2)针对川西地区出现的复杂情况,重点开展对井壁更稳定的聚胺仿油基钻井液处理剂优选,研制出具有一套聚胺仿油基钻井液体系：3～4%NV-1+0.03%MMCA+ 1%LV-CMC+3-5%MEG+0.4%JA-11+1-1.5%KHPAN+0.5～1%NH4HPAN+1～2%FT342+0. 1%NaOH+0.2～0.5%QS-2+BaSO4。(3)实验评价表明该体系具有强抑制性、强封堵性和优秀的润滑性。并对该聚胺仿油基钻井液体系优化和性能评价,提出体系转型方案和维护要点,形成针对川西地层独特的聚胺仿油基钻井液体系施工工艺。(4)矿场应用实践表明,造斜段、水平段起下钻顺利,井壁稳定,无阻卡等复杂情况发生,满足川西地区水平井安全、高效的施工需求。
[Abstract]:During drilling and development in western Sichuan, the Majing and Xiaoquan structures are rich in brown red (brown) mudstone, which are easy to be hydrated and dilated, and are easy to cause stability problems such as collapse of shaft wall and shrinkage of diameter. Increase the friction and torque, and even lead to difficulties such as jam or accident. Through the statistics of the previous construction in this area, it is shown that the existing water-based drilling fluid system is difficult to fully meet the requirements of horizontal well construction in western Sichuan, and shows more complex conditions, especially the instability of formation wall and the inclined well section. Complex problems such as large frictional resistance in horizontal section. Therefore, in view of the formation characteristics and technical difficulty of drilling fluid in western Sichuan, on the basis of investigating the present situation of polyamine mimic oil base drilling fluid system at home and abroad, the treatment agent of polyamine imitating oil base drilling fluid system is selected. The evaluation and optimization of system performance and the application of mine field are studied comprehensively and deeply: (1) through the study of geological conditions in western Sichuan, the formation characteristics, the difficulties of drilling fluid system and the difficulty of construction in this area are analyzed. Synthesizing the complex situation of drilling fluid in the early stage in this area, it is shown that the water-based drilling fluid system used in western Sichuan area is difficult to meet the requirements of drilling and development. (2) aiming at the complex situation in western Sichuan area, Focusing on the selection of more stable polyamine-mimic oil-based drilling fluid treatment agents, A set of polyamine mimic oil base drilling fluid system, 3~4%NV-1 0.03%MMCA 1%LV-CMC 3-5%MEG 0.4%JA-11 1-1.5%KHPAN 0.5~1%NH4HPAN 1~2%FT342 0. 1%NaOH 0.2~0.5%QS-2 BaSO4. (3) experiments show that the system has strong inhibition, strong plugging and excellent lubricity. The optimization and performance evaluation of the polyamine mimic oil based drilling fluid system is also given, and the system transformation scheme and maintenance points are put forward to form the unique construction technology of polyamine imitating oil base drilling fluid system for the formation of western Sichuan. (4) the field application practice shows that the slanting section is made. The horizontal section is smooth, the shaft lining is stable, and the complex conditions such as unobstructed card occur, which meet the requirements of safe and efficient construction of horizontal wells in West Sichuan.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE254

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