孔隙结构的特征及其对紧密气体砂岩水库中水相捕获损伤的影响
Qing Guo1, Xiaojia Lu2, Tao Liu2
1BaiLie School of Petroleum Engineering, Lanzhou City University, Lanzhou, China.
PloS one
|April 26, 2024
概括
紧密气体砂岩中的水相捕获 (APT) 是一个主要的生产问题. 微孔断层维度 (D2) 有效地预测APT损伤,优于复杂水库的传统孔径大小分析.
科学领域:
- 石油工程是石油工程中的一个.
- 地质地质地质地质地质地
- 储水池的表征 储水池的表征
背景情况:
- 水相捕获 (APT) 显著阻碍了天然气生产在低透性密气砂岩储.
- 毛孔大小和微观毛孔结构是影响水阻塞损伤的关键因素.
研究的目的:
- 为了研究孔隙结构特征与紧密气体砂岩中APT损伤之间的关系.
- 评估碎形维度在预测APT损伤方面的有效性.
主要方法:
- 高压侵入试验 (HPMI) 用于分析9个核心样本的孔径分布 (PSD) 和碎形尺寸 (宏孔径D1,微孔径D2).
- 进行了气体泛滥测试,以确定透性恢复比率 (Kr) 作为APT损坏的衡量标准.
主要成果:
- 核心样本呈现出广泛的多孔性 (5.68%-13.7%) 和透性 (0.00456-7.86 mD),表明强烈的异质性.
- 狭窄的砂岩表现出多分体特征,其中D1和D2分别代表了宏观和微孔分体尺寸.
- 虽然毛孔大小参数与透性恢复的相关性很弱,但微毛孔碎形维度 (D2) 与Kr (0.9878为I型,0.7723为II型) 呈现出强烈的负相关性.
结论:
- 碎形尺寸,特别是D2,优于传统的孔径尺寸参数,用于描述紧密气体砂岩中流道的复杂性和异质性.
- 微孔断层维度 (D2) 可以可靠地预测紧密气体砂岩储中潜在的APT损伤.
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