马深1超深井四开钻井液技术

发布时间：2018-01-18 13:23

本文关键词：马深1超深井四开钻井液技术　出处：《钻井液与完井液》2017年02期 　论文类型：期刊论文

【摘要】：马深1井是中石化勘探分公司部署在川东北通南巴构造带马路背构造高部位的一口重点预探井。完钻井深为8 418 m,目的层主探下寒武统龙王庙组储层。该井四开作业井段为6 225.4~7 699 m,钻遇龙马溪组时存在大段泥页岩地层,井壁稳定问题比较突出,且地层压力系数高,超深井段井温高,钻井液易受酸根污染,施工风险较大。该井四开钻井液技术难点主要是高温下高密度钻井液流变性控制、井壁稳定及酸根污染问题等。针对以上难点,通过大量室内实验,优选出以下几种主要处理剂:抗温强的聚胺抑制剂BCG-7,加量控制在0.4%;抗温主剂采用高温下降滤失效果好且不提黏的SMP-3,加量控制在5%~6%;抗温降滤失效果好且不提黏的聚合物类降滤失剂PFL-L及HPL-3,加量分别控制在2%及1.5%;抗温降黏剂选用HR-300、SMS-19,加量视情况而定;同时引入抗氧化剂,以提高体系的抗温性。最终确定钻井液基本配方为3%NV-1+0.3%KOH+5%KCl+1.5%HPL-3+1%AOP-1+3%SCL+3%FT+5%SMP-3+3%LF-1+0.4%BCG-7+3%QS-2。在马深1井现场应用时,根据实钻情况及时调整处理剂加量,对钻井液配方进行微调,在该井四开井段使用过程中,表现出高温高密度下流变性好、抑制能力强、封堵效果好及抗酸根能力强的特点。KCl-胺基聚磺钻井液技术为顺利完成马深1井四开井段的钻探工作提供了强有力的技术支撑,最终形成了一套完整的超深井钻井液技术。
[Abstract]:Well Ma-Shen 1 is a key pre-exploration well deployed by Sinopec Exploration Branch in the high back structure of the road back of Tongnanba structural belt in northeastern Sichuan. The drilling depth is 8 418m. The reservoir of the lower Cambrian Longwangmiao formation is mainly explored in the target formation. The well section of Sikai is 6 225.4 ~ 7 699 m. There is a large section of shale formation in the drilling of Longmaxi formation, and the problem of wellbore stability is obvious. Moreover, the formation pressure coefficient is high, the well temperature is high, the drilling fluid is easy to be polluted by acid radical, and the construction risk is great. The technical difficulty of drilling fluid with four openings in this well is mainly the control of high density fluid rheology under high temperature. In view of the above difficulties, through a large number of laboratory experiments, the following main treatment agents are selected: the polyamine inhibitor BCG-7, which has strong temperature resistance, is controlled at 0.4; The main temperature resistant agent is SMP-3, which has good filtration loss effect with high temperature drop and no viscosity, and the dosage is controlled at 5%. PFL-L and HPL-3 polymer filtrate reducers with good effect of temperature resistance and no viscosity were controlled at 2% and 1.5 respectively. HR-300 and SMS-19 were used as viscosity reducing agent, and the dosage was determined according to the situation. At the same time introduce antioxidants. In order to improve the temperature resistance of the system, the basic formula of drilling fluid was determined to be 3NV-1 0.3koh and 5KCl 1.5HPL-3 1AOP-1 3 for SCL. 3FT 5 SMP-3 3LF-1 0.4G-7 3QS-2.It was used in the field of well Masen1. According to the actual drilling conditions timely adjust the amount of treatment agent to fine adjust the drilling fluid formula, in the use of the fourth section of the well, the performance of high temperature and high density rheology, strong inhibition ability. The characteristics of good plugging effect and strong acid resistance. KCl-amine polysulfonate drilling fluid technology provides a strong technical support for the successful completion of drilling in the fourth section of Mashen 1 well. Finally, a complete set of ultra-deep well drilling fluid technology was formed.
【作者单位】：中石化中原石油工程有限公司西南钻井分公司;
【分类号】：TE254
【正文快照】： 马深1井位于川东北通南巴地区,是中石化勘探分公司部署在川东北通南巴构造带马路背构造高部位的一口重点预探井,目的层主探下寒武统龙王庙组储层。根据地质勘探需要,钻至井深8 418 m完钻,完钻层位为灯影组二段。该井属于超深井,地层复杂,施工难度大。四开作业井段为6 225.4~7

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