Quantitative test and analysis of clay surface hydration water based on low-field nuclear magnetic resonance technology

被引：0

作者：

Su J. ^{[1
]}

Dong W. ^{[1
]}

Luo P. ^{[1
]}

Xu X. ^{[2
]}

Huang J. ^{[1
]}

机构：

[1] State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, Sichuan

[2] CNPC Engineering Technology Research & Development Company Limited, Beijing

来源：

Shiyou Xuebao/Acta Petrolei Sinica | 2019年 / 40卷 / 04期

关键词：

Clay; Evaluation; Low-field nuclear magnetic resonance; Quantitative test; Surface hydration;

D O I：

10.7623/syxb201904008

中图分类号：

学科分类号：

摘要：

The research on the hydration type and degree of clay minerals is one of the key factors and difficult points for the fast drilling of water-based fluid into shale formation. In this study, the isothermal adsorption experiment and the variation law of clay spacing are applied to determine the relative equilibrium pressure limits of different types of hydration water for clay. Then, based on the relationship between theT2 relaxation spectrum of low-field nuclear magnetic resonance and the mobility of water molecules as well as the relative relationship between the changes in interlayer spacing of clay and the diameter of hydration water molecules, the type of clay hydration corresponding to the T2 value range was determined. According to the principle that the amplitude of T2 signal is proportional to the number of hydrogen protons of water molecules, the standard curve of T2 value and clay water content has been established to determine the quantitative relationship between T2 signal amplitude and clay water content. The experimental results show that the surface hydration water, permeated hydration water and free water of saturated sodium bentonite after centrifugation at 3500 r/min for 10 min correspond to T2 values ranging from 8.91 to 73.17 μs, 0.97 to 10.23 ms, and more than 71.49 ms respectively; The proportions of surface hydration water, permeated hydration water and free water of the above sodium bentonite are 9.62%, 61.49% and 28.88% respectively. © 2019, Editorial Office of ACTA PETROLEI SINICA. All right reserved.

引用

页码：468 / 474

页数：6

共 26 条

[1]

Huang H., Yang K., Luo P., Principle of Mud Process, (1981)

[2]

Van Olphen H., An Introduction to Clay Colloid Chemistry: For Clay Technologists, Geologists, and Soil Scientists, (1963)

[3]

Qiu Z., Zhong H., Huang W., Properties and mechanism of a new polyamine shale inhibitor, Acta Petrolei Sinica, 32, 4, pp. 678-682, (2011)

[4]

Song R., Jiang G., Xuan Y., Et al., Hyper-branched polyethyleneimine using as efficient shale inhibitor for water-based drilling fluid, Oilfield Chemistry, 34, 3, pp. 390-396, (2017)

[5]

Huang L., Luo X., Study on the testing method of polymer inhibity evaluation by capillary suction time tester, Drilling Fluid and Completion Fluid, 12, 1, pp. 1-5, (1995)

[6]

Zhang B., Shan W., Tian G., Et al., Testing study on the hydration of shale, Chinese Journal of Rock Mechanics and Engineering, 19, pp. 910-912, (2000)

[7]

Xie G., Deng M., Zhang L., A study on the influence of electrolytes on clay bound water, Drilling Fluid & Completion Fluid, 30, 6, pp. 1-4, (2013)

[8]

Wang P., Li X., Thermal-weightlessness method to determine water content and existing form of hydratable clay, Natural Gas Industry, 26, 1, pp. 80-83, (2006)

[9]

Di Q., Zhang J., Ye F., Et al., Nuclear magnetic resonance visualization experiment of gravity tongue characteristics in the displacement process, Acta Petrolei Sinica, 38, 10, pp. 1183-1188, (2017)

[10]

Li Z., Qi Z., Shen X., Et al., Research on quantitative analysis for nanopore structure characteristics of shale based on NMR and NMR cryoporometry, Energy & Fuels, 31, 6, pp. 5844-5853, (2017)

← 1 2 3 →