煤田地质与勘探Issue(1)：137-140,4.DOI:10.3969/j.issn.1001-1986.2016.01.027
沁水盆地岩性交替井绒囊钻井液实践
Application of fuzzy-ball drilling fluid in alternating lithology well of Qinshui Basin
摘要
Abstract
According to the experiments and applications, it was proved that the Fuzzy-ball drilling fluid can effectively solve the leakoff, block and collapses induced by quickly changed lithology. MBS26-11 and MBS24-5 were two directional production wells in Qinshui Basin. The drilled layers were many and complex. And the lithology was alternated frequently. And in the second interval of MBS26-11, the clay-free fuzzy ball drilling fluid was used. The density covers from 0.95~1.05 g/cm3. The viscosity was from 35 to 38 seconds. The average ROP was 10.79 m/h which was 9.2% more than adjacent well. In the first interval of MBS24-5, by applying bentonite drilling fluid, the leakoff was severe and the loss rate was 6.95m3/h. Then, by using fuzzy-ball drilling fluid, the loss rate was controlled within 1.68m3/h. In the second interval, the clay-free fuzzy ball drilling fluid was also applied. The density of drilling fluid was 0.93 g/cm3 to 0.98 g/cm3 with the viscosity of above 38 seconds, the plastic viscosity of 6 to 14mPa·s, a yield value of 3.00 to 6.64YP/Pa and a ratio of dynamic to plastic viscosity of 0.43~1.66Pa/mPa·s. The average ROP was 5.6 m/h.关键词
沁水盆地/煤层气/岩性交替/钻井液/绒囊/防漏堵漏/防塌Key words
Qinshui Basin/CBM/alternating lithology/drilling fluid/fuzzy-ball/prevention and blockage of Leakage/prevention of collapse分类
天文与地球科学引用本文复制引用
闫立飞,申瑞臣,袁光杰,夏焱,刘兆利,王武..沁水盆地岩性交替井绒囊钻井液实践[J].煤田地质与勘探,2016,(1):137-140,4.基金项目
国家科技重大专项课题(2011ZX05036-003)@@@@National Science and Technology Major Project(2011ZX05036-003) （2011ZX05036-003）
