Prediction of Physical-Mechanical Properties and In-Situ Stress State of Hydrocarbon Reservoirs from Experimental Data and Theoretical Modeling

2017 ◽  
Author(s):  
N. Dubinya ◽  
S. Tikhotsky ◽  
I. Bayuk ◽  
D. Beloborodov ◽  
M. Krasnova ◽  
...  
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Stress State ◽  
In Situ Stress ◽  
Theoretical Modeling ◽  
Hydrocarbon Reservoirs

scholarly journals In situ stress state from walkaround VSP anisotropy in the Kumano basin southeast of the Kii Peninsula, Japan

2011 ◽  
Vol 12 (9) ◽  
pp. n/a-n/a ◽  
Author(s):  
Takeshi Tsuji ◽  
Ryota Hino ◽  
Yoshinori Sanada ◽  
Kiyohiko Yamamoto ◽  
Jin-Oh Park ◽  
...  
Keyword(s):  
Stress State ◽  
In Situ Stress ◽  
Kii Peninsula ◽  
Kumano Basin

Experiment on Mechanical Properties and Seepage Capability of Deep Tight Sandstone Under True-Triaxial Stresses Environment

2021 ◽  
Author(s):  
Jiaying Li ◽  
Chunyan Qi ◽  
Ye Gu ◽  
Yu Ye ◽  
Jie Zhao
Keyword(s):  
Mechanical Properties ◽  
In Situ Stress ◽  
Stress Sensitivity ◽  
Stress Conditions ◽  
Tight Sandstone ◽  
Gas Reservoir ◽  
True Triaxial ◽  
Strain Behavior ◽  
Triaxial Stresses

Abstract The characteristics of seepage capability and rock strain during reservoir depletion are important for reservoir recovery, which would significantly influence production strategy optimization. The Cretaceous deep natural gas reservoirs in Keshen Gasfield in Tarim Basin are mainly buried over 5000 m, featuring with ultra-low permeability, developed natural fractures and complex in-situ stress states. However, there is no comprehensive study on the variation of mechanical properties and seepage capability of this gas reservoir under in-situ stress conditions and most studies on stress-sensitivity are conducted under conventional triaxial or uniaxial stress conditions, which cannot truly represent in-situ stress environment. In this work, Cretaceous tight sandstone in Keshen Gasfield was tested under true-triaxial stresses conditions by an advanced geophysical imaging true-triaxial testing system to study the stress-sensitivity and anisotropy of rock stress-strain behavior, porosity and permeability. Four groups of sandstone samples are prepared as the size of 80mm×80mm×80mm, three of which are artificially fractured with different angle (0°,15°，30°) to simulate hydraulic fracturing. The test results corresponding to different samples are compared to further reveal the influence of the fracture angle on rock mechanical properties and seepage capability. The samples are in elastic strain during reservoir depletion, showing an apparent correlation with fracture angles. The porosity decreases linearly with stress loading, where the decrease rate of effective porosity of fracture samples is significantly higher than that of intact samples. The permeabilities decrease exponentially and show significant anisotropy in different principal stress directions, especially in σH direction. The mechanical properties and seepage capability of deep tight sandstone are successfully tested under true-triaxial stresses conditions in this work, which reveals the stress-sensitivity of anisotropic permeability, porosity and stress-strain behavior during gas production. The testing results proposed in this paper provides an innovative method to analyse rock mechanical and petrophysical properties and has profound significance on exploration and development of tight gas reservoir.

The in situ stress state of Kailuan mining area

2010 ◽  
pp. 375-380
Author(s):  
J Han ◽  
P Zhang ◽  
X Tian ◽  
S Sun ◽  
H Zhang ◽  
...  
Keyword(s):  
Stress State ◽  
Mining Area ◽  
In Situ Stress

The measurement of the in-situ stress state by acoustic emission method (AEM) in weak rocks

Rock Stress ◽  
2020 ◽  
pp. 389-394
Author(s):  
H. Watanabe ◽  
H. Tano ◽  
Ö. Aydan ◽  
R. Ulusay ◽  
E. Tuncay ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Stress State ◽  
In Situ Stress ◽  
Acoustic Emission Method ◽  
Emission Method ◽  
Weak Rocks

Estimation of in-situ stress state at the maximum depth of the Jinping tunnels, China

2010 ◽  
pp. 345-350
Author(s):  
C Zhang ◽  
X Feng ◽  
H Zhou ◽  
C Zhang ◽  
S Wu
Keyword(s):  
Stress State ◽  
In Situ Stress ◽  
Maximum Depth

In-situ stress state in the China’s Sea and adjacent areas

1992 ◽  
Vol 5 (3) ◽  
pp. 523-537 ◽  
Author(s):  
Jianli Gao ◽  
Jianmin Ding ◽  
Guoping Liang ◽  
Dahuang Xia ◽  
Qiliang Guo
Keyword(s):  
Stress State ◽  
In Situ Stress
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