摘要
针对热解析后脱油钻屑处理难和处理方式单一的问题,开展了将油基钻屑残渣制备成免烧压裂支撑剂的研究,研究了钻屑与水泥比、CMC添加量、石膏添加量和养护天数共4个因素对免烧压裂支撑剂性能影响。结果表明,在原料配比较优的情况下,制备工艺为钻屑水泥比0.67(质量比),石膏添加量为6%(质量分数),CMC添加量为4%(质量分数),养护时间28 d。该条件下制得的压裂支撑剂颗粒体积密度为1.47 g/cm^(3),视密度为2.52 g/cm^(3),35 MPa下颗粒破碎率为1.57%。经扫描电子显微镜与X射线衍射仪分析发现,此时压裂支撑剂内部结构致密,孔隙封闭,水化产物CaO·SiO_(2)·nH_(2)O凝胶和钙长石类物质有利于提高压裂支撑剂的综合物理性能。为脱油钻屑残渣利用提供新的方向。
In view of the difficulty in treating deoiled drilling cuttings after thermal analysis and lack of treatment method choices,the research on preparing non-burn fracturing proppant from oil-based drilling cuttings residue was carried out.The research explored the effects of drilling cuttings/cement ratio,CMC addition,gypsum addition and curing days on the performance of non-burn fracturing proppant.The results show that under the condition of excellent raw material ratio,the preparation process is as follows:the drilling cuttings/cement ratio is 0.67(mass ratio),the gypsum content is 6%(mass fraction),the CMC content is 4%(mass fraction),and the curing time is 28 days.The volume density of fracturing proppant particles prepared under this condition is 1.47 g/cm^(3),the apparent density is 2.52 g/cm^(3),and the particle crushing rate under 35 MPa is 1.57%.Through the analysis of scanning electron microscope and X-ray diffraction,it is found that at this time,the internal structure of the fracturing proppant is compact,the pores are closed,and the hydration products C-S-H gel and anorthite are conducive to improving the comprehensive physical properties of the fracturing proppant.It provides a new direction for the utilization of deoiled drilling cuttings residue.
作者
白杨
常爽
刘宇程
柳新国
罗平亚
BAI Yang;CHANG Shuang;LIU Yucheng;LIU Xinguo;LUO Pingya(National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,China;College of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu,Sichuan 610500,China;Petroleum Engineering School,Southwest Petroleum University,Chengdu,Sichuan 610500,China)
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2024年第1期76-88,共13页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
国家重点研发计划(2019YFA0708303)
四川省科技计划(2020JDJQ0057,2020JDTD0018)
中国石油西南石油大学创新联合体科技合作项目(2020CX040102,2020CX040201)。
关键词
免烧支撑剂
水力压裂
油基钻屑
水化硬化
资源化利用
non-burn free proppant
hydraulic fracturing
oil-based drill cuttings
hydration hardening
resource utilization
