威202H3平台废弃油基钻井液处理技术

发布时间：2018-06-23 19:22

本文选题：回收利用 + 废弃钻井液　；参考：《钻井液与完井液》2017年02期

【摘要】：目前处理废弃油基钻井液一般采用集中填埋或回注地层,依然存在潜在的环境污染问题,同时也浪费了大量矿物油资源。笔者对威202H3平台废弃油基钻井液进行回收利用研究,首先测定了废弃钻井液本身的性质,测得其表观黏度为100~120 mPa·s、塑性黏度为80~100 mPa·s、动切力为20 Pa、初终切为20/35 Pa/Pa,粒度主要集中在5.59~13.74μm。在现场及实验室进行复配再利用研究,发现在威202H3-3井龙马溪地层加入2 m~3废弃油基钻井液后,油基钻井液终切不断升高、动塑比难以控制;利用废弃油基钻井液中劣质固相,在长宁H12-3井用于配制堵漏浆,施工顺利,效果较好。因此得出,废弃油基钻井液回收再利用的困难在于其中含有大量粒径小于20μm的固体颗粒,现有固控设备难以除去,并且现有处理技术均存在安全、占地面积、能耗、交通运输、环保及成本问题,建议这种废弃油基钻井液体系用于配制页岩地层发生漏失时的堵漏浆,在一定程度上减小经济损失。而在今后废弃油基钻井液处理技术的研究过程中,如果超临界CO_2流体萃取技术能够降低成本,将成为废弃油基钻井液重要的处理技术。
[Abstract]:At present, the waste oil-based drilling fluid is usually treated by centralized landfill or reinjection, which still has the potential environmental pollution problem and wastes a large number of mineral oil resources at the same time. In this paper, the recovery and utilization of the waste oil-base drilling fluid from Wei-20H3 platform is studied. The properties of the abandoned drilling fluid are measured at first. The apparent viscosity, plastic viscosity, dynamic shear force and initial and final shear force of the waste drilling fluid are 100 ~ 120 MPA, 80 ~ 100 MPA, 20% and 20% Paa, respectively. The particle size is mainly concentrated at 5.590.13.74 渭 m. In the field and laboratory, it is found that after the addition of 2 mm3 waste oil base drilling fluid in Longmaxi formation of Wei20H3-3 well, the final cut of oil base drilling fluid is increasing and the dynamic plastic ratio is difficult to control, and the poor solid phase in the waste oil base drilling fluid is used. In Changning H12-3 well, the construction is smooth and the effect is good. Therefore, the difficulty of recycling waste oil-based drilling fluid is that it contains a large number of solid particles with diameter less than 20 渭 m, the existing solid control equipment is difficult to be removed, and the existing treatment technologies are safe, occupying an area, consuming energy, and transportation. It is suggested that the waste oil-base drilling fluid system should be used to prepare the plugging slurry in shale formation when leakage occurs, and to reduce the economic loss to a certain extent. In the research process of waste oil-based drilling fluid treatment technology, if the supercritical CO _ 2 fluid extraction technology can reduce the cost, it will become an important treatment technology of waste oil-based drilling fluid.
【作者单位】：油气田应用化学四川省重点实验室;川庆钻探工程有限公司钻采工程技术研究院;
【基金】：四川省科技项目“页岩气钻完井工程技术研究”(15ZC1582)
【分类号】：TE254.2

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