Laboratory hydraulic fracturing experiments for determining reopening and closing pressures of fractures

被引：0

作者：

Imai, Tadao ^{[1
]}

Kamoshida, Naoto ^{[2
]}

Kato, Harumi ^{[3
]}

Sugimoto, Fumio ^{[1
]}

机构：

[1] Department of Earth Sciences and Technology, Akita University, Akita 010-8502

[2] Department of Civil and Environmental Engineering, Iwate University, Morioka 020-8551

[3] Geotechnos Co., Ltd., Shimbashi Minato-Ku, Tokyo 105-0004

来源：

International Journal of the Society of Material Engineering for Resources | 2009年 / 16卷 / 1-2期

关键词：

Fracture; Hydraulic fracturing; Laboratory experiments; Tectonic stress measurement;

D O I：

10.5188/ijsmer.16.5

中图分类号：

学科分类号：

摘要：

We carried out laboratory hydraulic fracturing tests, which revealed that the pressure at the reopening and closing of fractures during hydraulic fracturing can be detected by monitoring the strains in the borehole wall and the triggering of acoustic emissions. In the experiments, we measured the pressures during the reopening and closing of a fracture caused by elastic restitution in a block of rock not subjected to compressive load. The pressures are used for correcting those obtained in blocks of rock when biaxial compressive load is applied. The reopening pressure (P,) is smaller than that obtained by the conventional method. This result expresses the following theoretical relationship. Pr = (35h-5H)/2 where SH is the maximum horizontal stress, and Sh is the minimum horizontal stress. The corrected reopening pressure of fracture agrees to within 0.7 MPa with that obtained from the above equation. © 2008 Soc.Matcr. Eng. Resour. Japan.

引用

页码：5 / 10

页数：5

共 8 条

[1] Haimson B.C., Cornet F.H., hydraulic fracturing (HF) and/or hydraulic testing of pre-existing fractures (HTPF), Int. J. Rock. Mech and Min. Sci, 40, pp. 1011-1020, (2003)
[2] Lee M.Y., Haimson B.C., Statistical Evaluation of Hydraulic Fracturing Stress Measurement Parameters, Int. J. Rock. Meck Min. Sci. and Geomeck Abstr, 26, pp. 447-456, (1989)
[3] Ito T., Evans K., Kawai K., Hayashi K., Hydraulic fracture reopening pressure and the estimation of maximum horizontal stress, Int. J. Rock. Meck and Min. Sci, 36, pp. 811-826, (1999)
[4] Hayashi K., Haimson C.B., Characteristics of Shut-in Curves in Hydraulic Fracturing Stress Measurements and Determination of in Situ Minimum Compressive Stress, J. Geophys. Res, 96, pp. 18311-18321, (1991)
[5] Lister R.J., Buoyancy-driven fluid fracture : Similarity solutions for the horizontal and vertical propagation of fluid-filled cracks, J. Fluid Mech, 217, pp. 213-239, (1990)
[6] Nakasima Y., Buoyancy-driven propagation of an isolated fluid-filled crack in rock : Implication for fluid transport in metamorphism, Contrib Mineral Petrol, 114, pp. 289-295, (1993)
[7] Ito T., Sato K., Hayashi K., Laboratory and field verification of a new approach to stress measurements using a dilatometer tool, J. Rock. Mech and Min. Sci, 38, pp. 1173-1184, (2001)
[8] Zoback M.D., Rummel F., Jung R., Raleigh C.B., Laboratory Hydraulic Fracturing Experiments in Intact and Pre-fractured Rock, Int. J. Rock. Mech Min. Sci. and Geomeck Abstr, 14, pp. 49-58, (1977)

← 1 →