不同类型储层支撑裂缝长期导流能力实验研究

发布时间：2018-06-24 05:36

本文选题：压裂 + 长期导流能力　；参考：《科学技术与工程》2017年11期

【摘要】：在油气田压裂作业过程中,对于不同类型岩性储层,支撑剂的嵌入和破碎程度不同,不同程度的嵌入和破碎都会导致裂缝缝宽变窄、导流通道堵塞,使裂缝导流能力降低。为分析不同岩性储层长期导流能力变化趋势以及嵌入和破碎的影响机制,采用FCS-842裂缝导流能力测试系统在模拟地层条件下分别测试了钢板、页岩岩板、中、细砂岩岩板的长期导流能力;并对实验后的各类型岩板和支撑剂进行了微观观察。实验结果表明:各种岩性岩板的导流能力虽大小不同但变化趋势相似,前10 h下降较快,后期趋于稳定略有下降;支撑剂嵌入程度与各岩性岩板的力学性质相关,嵌入程度随闭合压力增加而增加,在低压下嵌入速度较慢;支撑剂和岩板破碎产生的碎屑运移堵塞导流通道会使实验后期导流能力缓慢下降。
[Abstract]:In the process of oil and gas field fracturing, for different types of lithologic reservoirs, the degree of embedding and breaking of proppant is different, and different degree of embedding and breaking will lead to narrow fracture width, blockage of diversion channel, and decrease of fracture conductivity. In order to analyze the change trend of long-term conductivity of different lithologic reservoirs and the influence mechanism of embedding and breaking, FCS-842 fracture conductivity test system was used to test steel plate, shale slabs, and medium, respectively, under simulated formation conditions. The long-term flow conductivity of fine sand rock slabs and microcosmic observation of various types of rock slabs and proppant were also made. The experimental results show that the conductivity of various lithologic rock slabs is different, but the variation trend is similar, the first 10 hours decrease rapidly, the latter tends to stabilize slightly, and the degree of embed proppant is related to the mechanical properties of various lithologic rock slabs. The embedding degree increases with the increase of closing pressure, and the embedding speed is slow at low pressure, and the debris migration caused by the breakage of proppant and rock slab will block the diversion channel, which will make the capacity of diversion decrease slowly in the later stage of the experiment.
【作者单位】：中国石油大学(北京)石油工程学院;中国矿业大学(北京)地球科学与测绘工程学院;中国石化石油勘探开发研究院;
【基金】：中国石化科技攻关项目(P14076-1-03) 山西省煤基重点科技攻关项目(MQ2014-05)资助
【分类号】：TE357.11

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