川西新场构造深井防塌钻井液技术研究
发布时间：2019-02-16 06:22
【摘要】：针对川西新场构造深井井壁失稳问题,在对国内外防塌钻井液技术进行广泛资料调研的基础上,全面分析地层工程地质特征,开展井壁失稳的机理分析研究,通过对易垮塌层位的岩性、岩石结构、理化性质及X射线衍射和薄片分析,认为川西新场构造的千佛崖组和须五段等地层泥页岩属于硬脆性泥页岩,且有微裂缝和裂隙,并提出新场构造深井防塌钻井液技术对策。通过大量实验研究,优选出抑制效果好的抑制剂聚胺UHIB/有机硅井壁稳定剂、井壁封固剂FGL、封堵剂FST-2、成膜封堵剂JYW-2、可变形封堵材料FDFT-1,形成了适合新场构造深井的防塌处理剂体系；研究出了具有强抑制、封堵性能的强封堵金属离子钻井液体系和硅酸盐钻井液体系。通过在XC7井、X13井、X916-1井、X209井等多口井进行现场试验应用,证明本研究成果形成的防塌钻井液技术能明显减少井壁失稳引起的井下复杂情况,维护了井壁稳定,有效地保障了新场构造深井钻井作业。通过系列井的现场应用试验及不断改进完善,最终形成了一套完整的针对川西新场构造易失稳地层的深井防塌钻井液技术。
[Abstract]:In view of the instability problem of deep well wall in Xinchang structure in western Sichuan, on the basis of extensive investigation of anti-sloughing drilling fluid technology at home and abroad, the formation engineering geological characteristics are comprehensively analyzed, and the mechanism analysis of shaft wall instability is carried out. Based on the analysis of lithology, rock structure, physicochemical properties, X-ray diffraction and thin slice analysis of collapsing strata, it is concluded that the Qianfoya formation and Xuwu formation of Xinchang structure in western Sichuan are hard and brittle shale with microfractures and fissures. The technical countermeasures of sloughing prevention drilling fluid for new field structure deep well are put forward. Through a large number of experimental studies, a good inhibitor, polyamine UHIB/ organic silicon wellbore stabilizer and FGL, plugging agent, FST-2, film forming plugging agent JYW-2, have been selected. The deformable plugging material FDFT-1, has been selected. The sloughing agent system suitable for the new field structure deep well is formed. The strong plugging metal ion drilling fluid system and silicate drilling fluid system with strong inhibition and plugging performance were studied. Through field test and application in XC7 well, X13 well, X916-1 well, X209 well and so on, it is proved that the sloughing prevention drilling fluid technology formed by this research result can obviously reduce the downhole complex situation caused by wellbore instability and maintain the wellbore stability. It effectively guarantees the drilling operation of deep well in Xinchang structure. Through the field application test of series wells and continuous improvement and improvement, a complete set of deep well sloughing prevention drilling fluid technology for the unstable formation of the new field structure in western Sichuan has been formed.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE254
[Abstract]:In view of the instability problem of deep well wall in Xinchang structure in western Sichuan, on the basis of extensive investigation of anti-sloughing drilling fluid technology at home and abroad, the formation engineering geological characteristics are comprehensively analyzed, and the mechanism analysis of shaft wall instability is carried out. Based on the analysis of lithology, rock structure, physicochemical properties, X-ray diffraction and thin slice analysis of collapsing strata, it is concluded that the Qianfoya formation and Xuwu formation of Xinchang structure in western Sichuan are hard and brittle shale with microfractures and fissures. The technical countermeasures of sloughing prevention drilling fluid for new field structure deep well are put forward. Through a large number of experimental studies, a good inhibitor, polyamine UHIB/ organic silicon wellbore stabilizer and FGL, plugging agent, FST-2, film forming plugging agent JYW-2, have been selected. The deformable plugging material FDFT-1, has been selected. The sloughing agent system suitable for the new field structure deep well is formed. The strong plugging metal ion drilling fluid system and silicate drilling fluid system with strong inhibition and plugging performance were studied. Through field test and application in XC7 well, X13 well, X916-1 well, X209 well and so on, it is proved that the sloughing prevention drilling fluid technology formed by this research result can obviously reduce the downhole complex situation caused by wellbore instability and maintain the wellbore stability. It effectively guarantees the drilling operation of deep well in Xinchang structure. Through the field application test of series wells and continuous improvement and improvement, a complete set of deep well sloughing prevention drilling fluid technology for the unstable formation of the new field structure in western Sichuan has been formed.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE254
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