钻井液与完井液2018，Vol.35Issue(1)：27-33,7.DOI:10.3969/j.issn.1001-5620.2018.01.005
新型纳米材料在页岩气水基钻井液中的应用研究
Research on Application of a Novel Nanophase Material in Water Base Drilling Fluids for Shale Drilling
摘要
Abstract
A layered Nanophase material LDP of 30 nm in particle sizes has been developed to satisfy the needs of shale drilling such as cuttings carrying,plugging nanometer-sized fractures and inhibiting the dispersion of shale formations.Laboratory experiments showed that a 2％LDP suspension,after aging at 120 ℃,had higher elastic modulus,yield stress and better shear thinning ability than a 6％ sodium bentonite suspension.In 0.5％PAC-LV solution,1％LDP shows better ability in increasing the viscosity and gel strengths of the solution than 4％ Na-bentonite.Periodic oscillatory strain scanning demonstrated that LDP suspension showed better ability to restore and break down its gel structure at the switch of high strain and low strain.Particle size measurement and transmission electron microscopy indicated that,compared with Na-bentonite,it is much easier for the LDP to form network structure both in water and in PAC-LV solution.To evaluate the plugging performance of LDP,shale samples rinsed in different solutions were measured for their pore sizes using N2 adsorption method.The measurement showed that LDP has better plugging capacity than nano SiO2 and Nabentonite.SEM scanning showed that LDP can plug the long and narrow nano-sized holes in shale.In clay swelling test,the percent core swelling caused by 2％LDP solution was 45％ of the percent core swelling caused by fresh water,better than 7％KC1 solution.The percent shale cuttings recovery of LDP in hot rolling test at 100 ℃ was 59.6％,equivalent to 7％KC1 solution.Clay clod rinsed in 2％ LDP solution for 96 h still kept its integrity.In general,LDP nanophase material is beneficial to viscosity and gel strength enhancement,plugging of nanometer-sized pores and inhibiting shale formations,and is thus prospective in formulating high performance water base drilling fluids for shale drilling.关键词
纳米材料/水基钻井液/页岩气开采/流变调节/纳米孔隙封堵Key words
Nanophase material/Water base drilling fluid/Shale gas development/Rheology adjustment/Plugging of nanometer-sized pores分类
能源科技引用本文复制引用
刘凡,蒋官澄,王凯,王玺,王金锡..新型纳米材料在页岩气水基钻井液中的应用研究[J].钻井液与完井液,2018,35(1):27-33,7.基金项目
国家自然科学基金面上项目“井壁稳定性及钻井液低温流变性的控制方法研究”(51474231) （51474231）
国家“十三五”科技重大专项“复杂结构井、丛式井设计与控制新技术”(2017ZX05009-003) （2017ZX05009-003）
中国石油天然气集团公司“十三五”项目“乍得,尼日尔钻完井工厂化作业技术集成与应用”(2016D-4503). （2016D-4503）
