Background fractures in carbonates: inference on control of sedimentary facies, diagenesis and petrophysics on rock mechanical behavior. Example of the Murge Plateau (southern Italy)

2015 ◽  
Vol 134 (3) ◽  
pp. 535-555 ◽  
Author(s):  
Arthur P.C. Lavenu ◽  
Juliette Lamarche ◽  
Lisa Texier ◽  
Lionel Marie ◽  
Bertrand D.M. Gauthier
Keyword(s):  
Mechanical Behavior ◽  
Southern Italy ◽  
Sedimentary Facies ◽  
Rock Mechanical Behavior

scholarly journals The late Pleistocene-Holocene sedimentary facies and geotechnical properties of CLM1 core at Cao Lanh city Mekong river delta

2013 ◽  
Vol 16 (2) ◽  
pp. 29-37
Author(s):  
Hoang Minh Truong ◽  
Lap Van Nguyen ◽  
Oanh Thi Kim Ta ◽  
Takemura Jiro
Keyword(s):  
Mechanical Behavior ◽  
Sedimentary Facies ◽  
Geotechnical Properties ◽  
River Delta ◽  
Mekong River ◽  
In Situ Tests ◽  
Mekong River Delta ◽  
Sedimentary Environments ◽  
Depositional Processes ◽  
Typical Sequence

The aim of the study was to know a trend of mechanical behavior and geotechnical properties; applied for, calculating the mechanical behavior of the ground, planning the infrastructure, specially the traffic system and port, and building a rational investigated-procedure by combinations of in-situ tests, sampling and laboratory tests. Sedimentary environments of the CLM1 core at Caolanh city, Mekong River Delta (MRD) were reestablished based upon the deposit properties. Investigate the geotechnical properties and origin of the formation of them. CLM1 core site which has seven facies; each facies has presents a typical sequence of the geotechnical properties. Post-depositional processes have important role in formation of geotechnical properties.

Managing Sanding Risk in Sandstone Reservoir Through a New Constitutive Model

2021 ◽  
Author(s):  
Surej Kumar Subbiah ◽  
Ariffin Samsuri ◽  
Assef Mohamad-Hussein ◽  
Mohd Zaidi Jaafar ◽  
Yingru Chen ◽  
...  
Keyword(s):  
Constitutive Model ◽  
Mechanical Behavior ◽  
Failure Criteria ◽  
Reservoir Rock ◽  
Triaxial Tests ◽  
Sand Production ◽  
Gas Field ◽  
Sandstone Rock ◽  
Sandstone Reservoir ◽  
Rock Mechanical Behavior

Abstract Sandstone reservoir failure during hydrocarbon production can cause negative impact on the oil/gas field development economics. Loss of integrity and hydrocarbon leakage due to downhole or surface erosion can decrease the risk of operational safety. Therefore, a proper understanding of the best formulation to manage and find the balance between productivity and sand risk is very important. Making decisions for the best and most economical completion design needs a full and proper sanding risk analysis driven by geomechanics modeling. The accuracy of modeling the reservoir rock mechanical behavior and the failure analysis depends on the selection of the constitutive model (failure criteria) specially to understand the failure and post failure mechanisms. Thus, an appropriate constitutive model/criterion is required as most of the current model/criteria are not developed for a weak rock material honoring the non-linearity and post failure (softening) process. Therefore, a new and novel elasto-plastic constitutive model for sandstone rock has been investigated and developed. The effort started with a sequence of triaxial tests at different confining pressures on core samples. Different types of rock have been tested during the developing and validation of the constitutive model. Comparison with other existing failure criteria was also performed. As the results, the newly developed constitutive model is better honoring the full spectrum of elasto-plastic rock mechanical behavior (softening and post-failure) which is important for oil and gas applications, specifically for sand production and drilling i.e. failure stabilization due to stress relief. The formulation and process are demonstrated with a case study for an old gas field, where a few gas wells have been shut-in due to severe sand production. The sand production predictive models have been validated with downhole pressure. The wells have been side-tracked and recompleted using the new sand failure prediction, using the new formulation resulted in restoring sand-free production at former rates. The novelty of this study would be in finding the right formula to best design the predictive model and to avoid any sand production when using the newly developed constitutive model.

A new look at rock mechanical behavior from the meso-scale grain

2021 ◽  
Vol 200 ◽  
pp. 108373
Author(s):  
Hao Yu ◽  
Arash Dahi Taleghani ◽  
Zhanghua Lian
Keyword(s):  
Mechanical Behavior ◽  
Meso Scale ◽  
Rock Mechanical Behavior ◽  
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