长宁、威远页岩气开发国家示范区油基岩屑处理实践分析

页岩气井水平段钻井过程中产生大量的油基岩屑,其资源化利用的研究越来越受到人们的重视,相关实践取得了长足进展。长宁、威远页岩气开发国家示范区采用LRET技术和热解析技术开展油基岩屑处理实践,处理后的油含量小于1%(w),油回收率达到95%以上。特别是采用LRET技术处理后,浸出液的毒性、易燃性、腐蚀性、反应性和急性毒性等指标均检测合格。这为油基岩屑的安全、环保、高效处理积累了经验。

Treatment practical analysis of oily cuttings in Changning and Weiyuan national demonstration shale gas area

A large number of oily cuttings are produced in shale gas well drilling process, the researches of resource utilization caused more and more attention, and the related practice has made great progress. In Changning and Weiyuan shale gas development national demonstration zone, the liquid of oil-based mud reuse for environmental technology(LRET) and thermal analysis technology were used to carry out oil-based cuttings processing practice, the treated oil content is less than 1%, and the oil recovery rate is above 95%. Especially after the leaching liquid was treated by LRET, its indicators suchas the toxicity, flammablity, corrosivity, reactivity, acute toxicity, etc. were qualified. It has accumulated valuable experience of oil base rock cuttings with safety, environmental protection and high efficiency.