An Overview of Wellbore Methods of Investigating Stress State of the Upper Layers of the Earth’s Crust

Dubinya, N. V.

doi:10.1134/s1069351319020034

Cited by 5 publications

(2 citation statements)

References 38 publications

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“…In fact, the position of these features around the wellbore can be used to determine the azimuth of S Hmax . The azimuth of wellbore breakout indicates the azimuth of S Hmin , and the azimuth of drilling-induced tensile fractures indicates the direction of S Hmax [19,[21][22][23]. The full wellbore micro-resistivity imaging (FMI) and Caliper log data of W203 and W205, and the XRMI data of R202 were obtained to analyse the S Hmax direction.…”

Section: Orientation Of Horizontal Stressmentioning

confidence: 99%

Geomechanical Analysis for Deep Shale Gas Exploration Wells in the NDNR Blocks, Sichuan Basin, Southwest China

Zheng

Tang

et al. 2020

Energies

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The abundant reserve of shale gas in Sichuan Basin has become a significant natural gas component in China. To achieve efficient development of shale gas, it is necessary to analyze the stress state, pore pressure, and reservoir mechanical properties such that an accurate geomechanical model can be established. In this paper, Six wells of Neijiang-Dazu and North Rongchang (NDNR) Block were thoroughly investigated to establish the geomechanical model for the study area. The well log analysis was performed to derive the in-situ stresses and pore pressure while the stress polygon was applied to constrain the value of the maximum horizontal principal stress. Image and caliper data, mini-frac test and laboratory rock mechanics test results were used to calibrate the geomechanical model. The model was further validated by comparing the model prediction against the actual wellbore failure observed in the field. It was found that it is associated with the strike-slip (SS) stress regime; the orientation of SHmax was inferred to be 106–130° N. The pore pressure appears to be approximately hydrostatic from the surface to 1000 m true vertical depth (TVD), but then becomes over-pressured from the Xujiahe formation. The geomechanical model can provide guidance for the subsequent drilling and completion in this area and be used to effectively avoid complex drilling events such as collapse, kick, and lost circulation (mud losses) along the entire well. Also, the in-situ stress and pore pressure database can be used to analyze wellbore stability issues as well as help design hydraulic fracturing operations.

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Section: Orientation Of Horizontal Stressmentioning

confidence: 99%

Geomechanical Analysis for Deep Shale Gas Exploration Wells in the NDNR Blocks, Sichuan Basin, Southwest China

Zheng

Tang

et al. 2020

Energies

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“…The development and exploitation of hydrocarbon fields, in conditions of high tectonic activity, in most cases are accompanied by the study of the geomechanical properties of the drilled rocks [1,2]. For the selection and optimization of the bit, it is extremely important to know the values of the uniaxial compression strength of rocks.…”

Section: Introductionmentioning

confidence: 99%

Geomechanical parameters of sedimentary rocks of Southern Sakhalin

Kamenev

Богомолов

Усольцева

et al. 2021

IOP Conf. Ser.: Earth Environ. Sci.

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The samples of terrigenous rocks of the Sakhalin were selected for geomechanical studies: the rocks of the Nevelskaya and Kholmskaya Formations from the Petropavlovsk quarry; ones of the Kholmskaya Formation on the west coast of the south of Sakhalin, rocks of the Junonskaya Formation on the east coast. The Kholmskaya Formation N1hl is represented by siltstones and interlayers of fine-grained sandstone. The Nevelskaya Formation N1nv is represented by siltstones with inclusions of tufogenic material. The Junonskaya Formation T2-Jun is represented by variegated greyish-green jaspers. Their static and dynamic parameters (strength limits, static Young’s modulus and Poisson’s ratio, cohesion and angle of internal friction) were determined. The obtained results are characterized by a significant spread of values, which is likely explained by the significant fracturing of the initial samples and the effect of anisotropy.

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On Stability of Inverse Problem Solution for Rock Mass Stress State Reconstruction Based on Natural Fractures Analysis

Novikova,

Dubinya

2024

Springer Proceedings in Earth and Environmental Sciences

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An Overview of Wellbore Methods of Investigating Stress State of the Upper Layers of the Earth’s Crust

Cited by 5 publications

References 38 publications

Geomechanical Analysis for Deep Shale Gas Exploration Wells in the NDNR Blocks, Sichuan Basin, Southwest China

Geomechanical Analysis for Deep Shale Gas Exploration Wells in the NDNR Blocks, Sichuan Basin, Southwest China

Geomechanical parameters of sedimentary rocks of Southern Sakhalin

On Stability of Inverse Problem Solution for Rock Mass Stress State Reconstruction Based on Natural Fractures Analysis

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