Evaluation of rock stress estimation by the Kaiser effect

Lehtonen, Aleksis; Särkkä, Pekka

doi:10.1201/9781439833650.ch18

Cited by 5 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The AE onset point in uniaxial Kaiser stress can produce credible results (Lehtonen and Särkkä 2006) the method, however, is still in development and far from fully reliable. This is also demonstrated by the fact that KE stress data are usually linked to DRA (Lin et al 2006a) or other core-related stress determination techniques (ASR, DSA, WVA).…”

Section: Uniaxial Kaiser Stress Approachmentioning

confidence: 99%

“…The more simplistic (experimental wise) uniaxial stress approach was used by several authors to determine the in-situ stress from KE observed in the laboratory before the publication of Holcomb's (1993a) generalized theory of KE (Holcomb and Martin 1985;Hughson and Crawford 1986; and after (Seto et al 1999;Villaescusa et al 2002;Lehtonen and Särkkä 2006). As stated by Holcomb (1993a), if indeed in-situ stress can be determined via uniaxial testing, then there must be another phenomenon responsible for the relationship between the onset of AE and the stress history of the rock taken from the Earth's crust.…”

Section: Uniaxial Kaiser Stress Approachmentioning

confidence: 99%

See 1 more Smart Citation

Stress Field of the Earth’s Crust

2010

View full text Add to dashboard Cite

Section: Uniaxial Kaiser Stress Approachmentioning

confidence: 99%

Section: Uniaxial Kaiser Stress Approachmentioning

confidence: 99%

Stress Field of the Earth’s Crust

2010

View full text Add to dashboard Cite

“…The used specimens were made of granite and gneiss. He suggested that there is a good correlation between the results of Kaiser effect method and traditional methods (Lehtonen & Särkkä, 2006). Once again in 2006, Villaescusa et al compared the results obtained from their proposed method with those obtained by the over-coring method at dif- The research performed by Wang et al showed that the results obtained from the acoustic emission proposed by them has a good agreement with the over-coring method.…”

Section: Comparing the Kaiser Effect Methods To Other In-situ Measure...mentioning

confidence: 98%

Untitled

2022

MGPB

View full text Add to dashboard Cite

Knowledge of in-situ rock stress is one of the significant issues in many engineering problems. There are various methods for determining in-situ stress. Most of the common methods used for the determination of in-situ stress are time and cost consuming, and in many cases need specific accessibility. Therefore, attention to core-based methods is increasing. One of these methods is the acoustic emission technique based on the Kaiser effect. This method is among the stress stressing-destressing methods and is based on observing rock behaviour without having any important impact on it. Knowledge of the acoustic emission principles and acoustic signal parameters is the first step to use the Kaiser effect method for in-situ stress determination. Also, using the Kaiser effect method requires knowledge on the mechanism and theory associated with the Kaiser effect. In this research, different methods for determining the Kaiser effect in parametric (tangent method and maximum slope, etc.) and signal processing (Fourier transform, wavelet transform, etc.) terms were reviewed. The results obtained from the Kaiser effect method were compared to other common methods used for in-situ stress measurement, like over-coring and hydraulic fracturing methods, and based on the results, there was a good agreement between them. Also, the effective parameters on determining the Kaiser effect stress point were investigated. The important parameters were the testing procedure, confining pressure, physical properties of rock, delay time and retention time, direction and amount of loading, anisotropy angle and loading rate.

show abstract

“…Additionally, samples from the folds were analyzed to acquire paleostress direction and magnitude (in MPa) by measuring acoustic emissions (AE) (the Kaiser effect). Peo-ple use this method to infer previous rock stress conditions (e.g., [35][36][37][38]); the measurement results represent the largest paleostress in history. All AE data were provided by the Key Laboratory of Geotechnical Engineering of Sichuan Province, and the experimental instrument model is the MTS815 Flex Test GT.…”

Section: Methodsmentioning

confidence: 99%

Fold-Related Fracture Distribution in Neogene, Triassic, and Jurassic Sandstone Outcrops, Northern Margin of the Tarim Basin, China: Guides to Deformation in Ultradeep Tight Sandstone Reservoirs

et al. 2021

View full text Add to dashboard Cite

Ultradeep (6-8 km depth) low-porosity sandstone oil and gas reservoirs, in the Kuqa thrust belt of Tarim Basin, are an important natural gas supply source of China. Both opening and shear-mode fractures are extremely necessary reservoir elements for gas production in these rocks but are challenging to characterize with sparse core and well log observations. Here, we use outcrops of some of the same units from four exposed folds to describe fracture types and patterns. These four folds have a range of shapes that are representative of folds at depth. At the Dongq, Kuqa, Misib, and Tuger anticlines, we analyzed fracture type, cross-cutting and abutting relations, density, spatial arrangement, kinematic aperture, orientation, and mineral fill. One-dimensional inventories, field sketches, photographs, and LiDAR imagery documented fracture patterns. Most dips of all fractures shown everywhere on the fold are greater than 60 degrees (over 50%). Fracture kinematic apertures are 3 mm to ~6 mm, and fracture density is 0.5 traces/m to ~1.5 traces/m. All fractures are divided into shear mode (or small faults) and opening mode. Shear-mode fractures, with high dips that strike N-S, mutually crosswise arranged with intersection angles of 30-60 degrees, are found extensively on the flanks of these folds. In contrast, most opening-mode fractures strike E-W, are arranged parallel to each other, and are localized in fold hinges. Besides, exposed folds (reservoir analogues, figure 1) in a proximal (hinterland, Tuger and Misib) position have fracture abundance distributions and aperture size patterns compatible with fold-related fracture development whereas distal (basinward, Kuqa and Dongq) folds lack this correlation, but patterns in distal folds might be explained by overprinted effects of lithological heterogeneity on fracture abundance or the effects of nearby faults. The positive correlation between fold-related strain and fracture spatial distribution in the northern (proximal) folds permitted inference of fracture patterns in deep wells.

show abstract

Evaluation of rock stress estimation by the Kaiser effect

Cited by 5 publications

References 0 publications

Stress Field of the Earth’s Crust

Stress Field of the Earth’s Crust

Untitled

Fold-Related Fracture Distribution in Neogene, Triassic, and Jurassic Sandstone Outcrops, Northern Margin of the Tarim Basin, China: Guides to Deformation in Ultradeep Tight Sandstone Reservoirs

Contact Info

Product

Resources

About