煤田地质与勘探2017，Vol.45Issue(1)：162-167,6.DOI:10.3969/j.issn.1001-1986.2017.01.031
煤层气钻井固相物污染特征及评价
Pollution characteristics and evaluation of solid-phase materials in CBM drilling
摘要
Abstract
Drilling fluid formulation and density are key parameters of pollution and evalution in coal reservoir. Through the dissection of the CBM wells in Sihe mining area, the paper observed the pollution characteristics of the drilling solid-phase material and established the relationship between drilling fluid density and depth of solid-phase invasion. The results showed that for large fracture system of coal reservoir, especially exogenous joints system as migration pathways and storage space of solid-phase materials in drilling fluid, the range of coal-bed methane well pollution was up to several meters. The higher the drilling fluid density, the thicker the mud cake in the coal reservoir fractures, the invesion depth of filtrate was reduced relatively. On this basis, the range of CBM drilling was predicted in Baiyanghe mining area, Xinjiang. Because of the broken coal texture of coal reservoir and adoption of along seam drilling technology in Xinjiang, the residence time of drilling fluid is long, the pollution of the solid-phase materials is relatively severe.关键词
煤层气钻井/污染固相物/大裂隙系统/钻井液密度/污染范围Key words
coalbed methane drilling/polluting solid-phase materials/large fracture system/drilling fluid density/pollu-tion range分类
天文与地球科学引用本文复制引用
吕帅锋,王生维,张晓飞,李瑞,何俊铧,胡奇..煤层气钻井固相物污染特征及评价[J].煤田地质与勘探,2017,45(1):162-167,6.基金项目
国家科技重大专项课题(2011ZX05034-002) （2011ZX05034-002）
山西省煤层气联合研究基金项目(2012012007) （2012012007）
山西省煤基重点科技攻关课题(MQ2014-04) National Science and Technology Major Project(2011ZX05034-002) （MQ2014-04）
Shanxi Provincial Basic Research Program—Coalbed Methane Joint Research Foundation(2012012007) （2012012007）
Shanxi Coal-based Scientific and Technological Key Program(MQ2014-04) （MQ2014-04）
