钻井液与完井液2016，Vol.33Issue(6)：23-27,5.DOI:10.3696/j.issn.1001-5620.2016.06.004
烷基糖苷衍生物钻井液研究及其在页岩气井的应用
Study on Alkyl Polyglucoside Derivative Drilling Fluid and Its Use In Shale Gas Drilling
摘要
Abstract
The YS108 shale gas block is located in Huangjinba,Zhaotong,Yunnan Province,and the pay zone of this block is the Longmaxi formation of the lower Silurian series.The lithology of the pay zone is mainly gray,black shales which are easy to slough and collapse.In horizontal drilling,high friction and drag,pipe sticking and difficulties in hole cleaning are problems that have been frequently encountered.To mitigate these difficulties,an alkyl polyglucoside (APG) derivative drilling fluid was formulated with NAPG,CAPG and APG as the main additives.NAPG is a polyether amino APG made from APG by introducing polyether and amino groups into the APG molecular structure.NAPG has better inhibitive capacity,high temperature stability and lubricity.CAPG is made from APG by introducing quaternary ammonium group into the APG molecular structure.CAPG has better inhibitive capacity and high temperature stability.NAPG and CAPG effectively reduce the Zeta potential and hence the activity of shales.APG was used in the drilling fluid as the main lubricant,plugging agents of different sizes (0.03-100 μm) and low molecular weight alkyl glucoside viscosifier were used to satisfy the needs of plugging micro fractures found in the Longmaxi shales.This drilling fluid had 7.5 min API filter loss of 0 mL,HTHP filter loss ≤ 5 mL.The extreme pressure friction coefficient was less than 0.10 if mud density was less than 2.30 g/cm3.As a drilling fluid with strong inhibitive capacity,good plugging capacity and good lubricity,the APG derivative drilling fluid successfully helped solve the difficulties previously encountered.In field application,gauge hole,good hole cleaning and good lubricity were obtained.Compared with 6 wells drilled nearby with high performance water base drilling fluids and wells drilled in an adjacent block,the well drilled with this drilling fluid had ROP increased by 14.6％-1 8.8％.The use APG derivative drilling fluid has satisfied the needs for horizontal shale gas drilling and well completion.关键词
页岩气/水平井/井壁稳定/烷基糖苷/水基钻井液Key words
Shale gas/Horizontal well/Borehole stabilization/Alkyl polyglucoside/Water base drilling fluid分类
能源科技引用本文复制引用
赵虎,龙大清,司西强,王善举,史沛谦,柳杰正,吴健..烷基糖苷衍生物钻井液研究及其在页岩气井的应用[J].钻井液与完井液,2016,33(6):23-27,5.基金项目
中国博士后科学基金特别资助“钻井液用两性甲基葡萄糖苷的合成及其作用机理”(2012T50641)、中国博士后科学基金面上资助“钻井液用糖苷基季铵盐的合成及其抑制机理研究”(2011M501194)和中石化集团公司科技攻关项目“页岩油气水平井水基钻井液技术研究”(JP14021)联合资助. （2012T50641）
