一种新型除油机理及含油钻屑除油技术

发布时间：2018-01-08 22:22

本文关键词：一种新型除油机理及含油钻屑除油技术　出处：《天然气工业》2017年02期 　论文类型：期刊论文

【摘要】：油基钻井液是页岩气开发中最为常用的一种钻井液体系,随着页岩气勘探开发的加快发展及油基钻井液的大量使用,其产生的含油钻屑带来的环境污染也逐渐成为油气田企业的环保难题。为此,进行了现场含油钻屑组成、重金属含量和浸出液生物毒性分析,确定了含油钻屑污染特性和处理重点:针对含油钻屑污染特性,基于化学清洗法,首次引入过渡态理论,通过理论和实验分析,提出了一种新型岩屑除油机理,油滴从岩屑表面移动至油相存在着一个势能壁垒,清除岩屑中的油污需越过此势能壁垒;进而设计了含油钻屑除油配方,并通过单剂筛选、配方优化和除油条件优选,最终开发了一套含油钻屑化学清洗法除油技术。使用效果表明:在所研制的聚氧乙烯类除油剂与硫酸盐类、磺酸盐类辅助除油剂的共同作用下,势能壁垒可降低92.81%,由其处理的含油钻屑除油率达到93.02%。结论认为,该技术工艺安全简单、成本低、除油率高,可有效地解决含油钻屑的环境污染问题。
[Abstract]:Oil based drilling fluid is shale gas development in one of the most commonly used drilling fluid system, with the exploration and development of shale gas development and accelerate the use of oil-based drilling fluids, oil drilling chips produced the environmental pollution caused by environmental problem has gradually become the oil and gas enterprises. Therefore, the field of oily cuttings composition analysis of heavy metal contents and leaching toxicity, determine the oily cuttings pollution characteristics and processing key: for oily cuttings pollution characteristics, chemical cleaning method is introduced for the first time based on the transition state theory, through theoretical and experimental analysis, put forward a new cutting oil removing mechanism, oil droplets from the surface of the cuttings to move the oil phase there is a potential energy barrier, remove oil cuttings in need across the potential barrier; and design of oil drilling oil formula, and through the single agent selection, formulation optimization and optimum conditions of oil removal, eventually developed An oily cuttings chemical cleaning oil removal technology. The results show that in the nonionic degreasing agent and sulfate, sulfonate auxiliary agent in addition to the common effect of oil, energy barriers can be reduced by 92.81% by the treatment of oily cuttings oil removal rate reached 93.02%.. According to the theory of the technology the process is simple and safe, low cost, high removal rate, which can effectively solve the problem of environmental pollution of oil drilling.

【作者单位】：中国石油大学(北京)石油工程学院;中国石油集团渤海钻探工程有限公司;中联煤层气有限责任公司研究中心;山西省国新能源发展集团有限公司;
【基金】：国家科技重大专项“新型低伤害强防塌钻井液体系研究”(编号:2016ZX05044003-003) 国家自然科学基金面上项目“低渗裂缝性砂岩凝析气藏损害机理及有效保护开发一体化新方法研究”(批准号:51374225) 中国石油大学(北京)优秀青年教师基金项目“封堵钻井恶性漏失的新型高强度凝胶研制研究”(编号:2462015YQ0211)
【分类号】：X741
【正文快照】： 自2009年以来,很多机构对中国页岩气潜在储量进行了预测,预计中国页岩气地质资源量介于83.3×1012~134.4×1012 m3,技术可采资源量介于10.0×1012~36.1×1012 m3。虽然中国页岩气勘探开发整体处于发展阶段,但开发前景较乐观,同时也面临着诸多挑战,预计2020年前后页岩气产能介

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