摘要
在分析长岭地区深层储层裂缝发育规律的基础上,提出无渗透桥堵技术。通过桥堵剂粒级配比优选和封堵裂缝试验得出:堵漏剂的最优浓度为30 g/L,颗粒状、片状、纤维状材料的最优粒级配比为6∶3∶2,4 L井浆+1%DCM+2%桥塞剂+1%木粉(0.9 mm以下)+1%胶粒(0.9 mm以下)为最优桥堵配方;井浆中加入非渗透处理剂后,可以形成超低渗透钻井液滤饼,可有效阻挡清水和气体的滤失。现场应用结果表明,该技术在提高地层承压能力、预防固井钻井液漏失和降低固井过程发生气、水窜方面显示了良好的效果,平均固井合格率达到98.1%,固井优质率达到87.35%,具有较高的推广价值。
On the basis of analyzing the regularity of fracture development in deep reservoir of Changling region, the technol- ogy of non-filtration and bridge blinding was proposed. Tests of optimizing of size fraction match of bridging material and plugging fracture were curried out. The following are the main conclusions ： The optimum concentration of lost circulation ma- terial is 30 g/L, the optimum size fraction match of particulate, sheet and fibrous bridging material is 6： 3： 2, and the opti- mum bridging formulas is slurry（4 L） ＋ 1% DCM ＋2% bridging particle ＋ l%woodflour（0.9 mm below） ＋ 1% colloid （0. 9 mm below）. A ultra-low permeability drilling fluid cake could be generated by adding no penetrative treating agent in slurry, which can effectively resist the filtration of clear water and gas. The field application indicated a favorable effect of this tech- nology in raising the bearing capacity, preventing the drilling fluid leaking, and decreasing the gas and water breakthrough in well cementation. The mean qualification rate and quality rate of well cementation are 98. 1% and 87.35% respectively. The technology has high popularization value.
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第4期81-84,共4页
Journal of China University of Petroleum(Edition of Natural Science)
关键词
无渗透
桥堵
完井液
深层气井
non-filtration
bridge blinding
completion fluid
deep gas well
