石英砂陶粒组合支撑剂导流能力影响因素

Influencing factors of flow conductivity of combined quartz sand-ceramsite proppant

车飞翔,樊婷婷,薛波,王帅,刘为恺

西安科技大学地质与环境学院，陕西 西安 710054 陕西省煤炭绿色开发地质保障重点实验室，陕西 西安 710054 国土资源部煤炭资源勘查与综合利用重点实验室，陕西 西安 710021 陕西延长石油（集团）有限责任公司油气勘探公司延长气田采气一厂，陕西 延安 716000

College of Geology and Environment, Xi′an University of Science and Technology, Xi′an 710054, China Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi′an 710054, China Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Land and Resources, Xi′an 710021, China No.1 Gas Production Plant, Yanchang Gas Field, Oil and Gas Exploration Company of Shaanxi Yanchang Petroleum (Group) Co., Ltd., Yan′an 716000, China

为探究石英砂陶粒组合支撑剂导流能力的影响因素，首先通过单因素实验分析了石英砂占比、压裂液类型、铺砂浓度、闭合压力的影响，然后根据均匀设计实验，利用灰色关联分析了各因素的影响程度。结果显示：4个因素对导流能力的影响程度从大到小分别为闭合压力、铺砂浓度、支撑剂配比、压裂液类型；不同配比中，闭合压力为40.0 MPa时，陶粒体积占比每增加1%，导流能力大致增加0.95%；高铺砂浓度下，导流能力更佳；经过滑溜水和胍胶压裂液处理后，导流能力分别下降了12.4%和23.9%；导流能力会随着闭合压力的增加而减小。研究结论为Y￣8井的现场压裂施工提供了理论指导，该井施工顺利，50 d累计产气量达195 371 m3，组合支撑剂的使用取得了良好的增产效果。

In order to explore the influencing factors of flow conductivity of the quartz sand-ceramsite proppant, firstly, the influence of proportion of quartz sand, type of fracturing fluid, sanding concentration and closure pressure on conductivity was analyzed through single factor experiment, and then according to the uniform design experiment, the grey correlation analysis is used to analyze the degree of influence of each influencing factor on conductivity. The results show that, from large to small, the four factors influencing conductivity are closure pressure, sanding concentration, proppant ratio, and fracturing fluid type. In different ratios, when the closure pressure is 40.0 MPa, the flow conductivity of the fracture will increase by 0.95% for every 1% increase in ceramsite proportion. At high sanding concentration, the conductivity will be better. After treatment with slippery water and guar gum fracturing fluid, the conductivity of fractures will decrease by 12.4% and 23.9% respectively. The conductivity will decrease as the closing pressure increases. The research results provide theoretical guidance for the on-site fracturing of well Y-8. The construction of the well was smooth and the cumulative gas production in 50 days reached 195,371 m3. The use of combined proppants achieved a good stimulation effect.

10.6056/dkyqt202201023