页岩应力敏感实验研究
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摘要
为研究页岩储层应力敏感性及其对产能的影响,选取四川气田下志留统龙马溪组钻井取心样品,开展了应力敏感实验研究,并结合全岩X射线衍射、高压压汞和扫描电镜实验方法,并结合渗流力学理论对页岩储层应力敏感的影响因素进行了分析。页岩储层中的小孔隙分布较多,孔径多为10nm以下,在外力作用下容易失去渗透能力,气体流动存在启动压力梯度,渗流通道数量的减少是导致页岩强应力敏感性的重要因素。粘土矿物具有片状的产状特征,在外力作用下更容易发生应力敏感且不容易恢复,石英矿物与粘土矿物相比抗压能力较强。
引文
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[4]Zhang Rui,Ning Zhengfu,et al.experimental study on microscopic pore strucyure controls on shale permeability under compact process[J].Natural Gas Geoscience,201425(8):1284-1289.[张睿,宁正福,等微观孔隙结构对页岩应力敏感影响的实验研究.天然气地球科学[J],2014,25(8):1284-1289.]
[5]Deng Jia,Zhu Weiyao,et al,Producttivity prediction model of shale gas considering stress sensitivity,Natura Gas Geoscience,2013,24(3):456-460[邓佳,朱维耀等考虑应力敏感的页岩气产能预测模型[J].天然气地球科学,2013,24(3):456-460]
[2]He Jingang,Kang Yili,et al,Effects of mineral composition and microstructure on stress sensitivity of mudrocks[J]Natural Gas Geoscience,2012,23(2):129-134何金钢,康毅力,游利军,等.矿物成分和微结构对泥质岩储层应力敏感性的影响[J]天然气地球科学,2012,23(2)129-134.
[3]Guo Wei,Xiong Wei,Gao Shusheng.Experiment study on stress sensitivity of shale gas reservoirs[J].Specia Gas Reservoirs,2012,19(1):95-97.[郭为,熊伟,高树生.页岩气藏应力敏感效应实验研究[J].特种油气藏,2012,19(1):95-97.]
[4]Zhang Rui,Ning Zhengfu,et al.experimental study on microscopic pore strucyure controls on shale permeability under compact process[J].Natural Gas Geoscience,201425(8):1284-1289.[张睿,宁正福,等微观孔隙结构对页岩应力敏感影响的实验研究.天然气地球科学[J],2014,25(8):1284-1289.]
[5]Deng Jia,Zhu Weiyao,et al,Producttivity prediction model of shale gas considering stress sensitivity,Natura Gas Geoscience,2013,24(3):456-460[邓佳,朱维耀等考虑应力敏感的页岩气产能预测模型[J].天然气地球科学,2013,24(3):456-460]