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.

scholarly journals Development of new novel constitutive model for deep reservoir sandstone rock for sand production application

2021 ◽  
Vol 1051 (1) ◽  
pp. 012093
Author(s):  
S K Subbiah ◽  
A Mohamad-Hussein ◽  
A Samsuri ◽  
M Z Jaafar ◽  
Y R Chen ◽  
...  
Keyword(s):  
Constitutive Model ◽  
Sand Production ◽  
New Novel ◽  
Sandstone Rock ◽  
Deep Reservoir

Experimental and Numerical Characterization of the Stress-Strain Behavior of Weak Sandstone Formations for Sanding Assessment

2018 ◽  
Author(s):  
Nubia Aurora González Molano ◽  
Jacobo Canal Vila ◽  
Héctor González Pérez ◽  
José Alvarellos Iglesias ◽  
M. R. Lakshmikantha
Keyword(s):  
Constitutive Model ◽  
Equivalent Plastic Strain ◽  
Experimental Tests ◽  
Thick Wall ◽  
Triaxial Tests ◽  
Experimental Program ◽  
Model Parameters ◽  
Sand Production ◽  
Strain Behavior ◽  
Weak Sandstone

In this study an extensive experimental program has been carried out in order to characterize the mechanical behavior of two weak sandstone formations of an offshore field for application to sand production modeling. The experimental tests included Scratch tests, Triaxial tests and Advanced thick wall cylinder tests (ATWC) where the sand production initiation and the cumulative sand produced were registered. Numerical simulations of experimental tests were then performed using an advanced elasto-plastic constitutive model. Triaxial tests simulations allowed calibrating the constitutive model parameters. These parameters were employed for the numerical simulation of the ATWC in order to determine the equivalent plastic strain threshold required to the onset of sand production observed in laboratory for sanding assessment. Results obtained highlight the importance to use a realistic representation of the rock behavior focusing on post-yield behavior in order to build confidence in model predictions.

Factors controlling tight gas sandstone reservoir quality in the Whicher Range gas field, Southern Perth Basin, Western Australia

2011 ◽  
Vol 51 (2) ◽  
pp. 741
Author(s):  
Cesar Orsini ◽  
Reza Rezaee ◽  
Moyra Wilson
Keyword(s):  
Western Australia ◽  
Tectonic Setting ◽  
Flood Plain ◽  
Reservoir Rock ◽  
Coarse Grained ◽  
Reservoir Quality ◽  
Tight Gas ◽  
Gas Field ◽  
Sandstone Reservoir ◽  
Tight Gas Sandstone

There are limited studies characterising the Willespie Formation, a Permian tight gas sandstone in the southern Perth Basin of Western Australia. Consequently, the main factors controlling the reservoir quality, lateral reservoir connectivity and fluid flow mechanism remain unknown. Available data from five Whicher Range wells—including wireline logs, seismic, core data, well reports and petrographic data—were studied to define the syn-depositional and post-depositional events affecting the reservoir rock quality. Based on analysis of the aforementioned data, the Willespie Formation is interpreted to have been deposited under predominantly fluvial conditions in an ancient rift basin of continental origin with no marine influence. The sedimentary environments were laterally varied, as inferred from discontinuous facies formed by meandering channels, crevasse splay and flood plain settings that were mainly controlled by the Permian tectonic setting. Extensive compaction due to ductile grain deformation, as well as clay and calcite cements—filling pores and replacing grains—are the main post-depositional factors affecting the reservoir quality of the medium–coarse-grained, poorly sorted litharenitic sandstones of the Willespie Formation. Combined syn-depositional parameters—controlling the composition and the texture of the sandstone—and post-depositional diagenetic events have had a critical control on the distinctive poor porosity (8% average) and very low permeability of this tight gas sandstone reservoir.

Influence of Sand Production in an Unconsolidated Sandstone Reservoir in a Deepwater Gas Field

2019 ◽  
Vol 141 (9) ◽  
Author(s):  
Fucheng Deng ◽  
Chuanliang Yan ◽  
Shanpo Jia ◽  
Shenghong Chen ◽  
Lihua Wang ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Flow Rate ◽  
Pressure Difference ◽  
Production Model ◽  
Production Test ◽  
Analysis Model ◽  
Sand Production ◽  
Gas Field ◽  
Sandstone Reservoir ◽  
Critical Production

In an unconsolidated sandstone reservoir of a deepwater gas field, due to the reduction of the rock compaction by deepwater, sand production is more likely to occur in the reservoir during production under certain production pressure differences. Therefore, it is important to accurately control the production pressure difference. A theoretical analysis model of sand production was established. On the basis of the model, the critical production pressure difference and the critical flow rate of the sand production were tested through indoor simulated experiments of sand production of three-dimensional full-diameter core. In addition, the critical production pressure difference for the sand production with an open hole completion was verified by means of numerical analysis. The analysis procedures and results are as follows: (1) based on the production test, the gas flow rate and the sand production rate under various production pressure differences were measured. It was found that the critical production pressure difference of core of target block was about 2 MPa, which is lower than the critical sand production pressure difference of core in shallow water or land. (2) A finite element analysis model was established by means of a theoretical analysis on the basis of core mechanics testing, and the analytical model was validated by comparing the experimental model and the theoretical model. A plastic deformation criterion for sand production was proposed. (3) The sand production model of the deepwater reservoir was established based on field parameters. The primary parameters that affect the rock strength were analyzed using the sand production criterion, which was verified by the experimental and numerical simulation results. Analysis results show that the effect of cohesive compared with elastic modulus, Poisson's ratio, and angle of internal friction on sand production is greater. At the same time, it should also pay attention to the influence of the drilling and production process on sand production.

scholarly journals Numerical Implementation of a Hydro-Mechanical Coupling Constitutive Model for Unsaturated Soil Considering the Effect of Micro-Pore Structure

2021 ◽  
Vol 11 (12) ◽  
pp. 5368
Author(s):  
Guoqing Cai ◽  
Bowen Han ◽  
Mengzi Li ◽  
Kenan Di ◽  
Yi Liu ◽  
...  
Keyword(s):  
Constitutive Model ◽  
Mechanical Behavior ◽  
Pore Structure ◽  
Unsaturated Soil ◽  
Fortran Program ◽  
Numerical Implementation ◽  
Numerical Application ◽  
Integration Algorithm ◽  
Mechanical Coupling ◽  
Numerical Program

An unsaturated soil constitutive model considering the influence of microscopic pore structure can more accurately describe the hydraulic–mechanical behavior of unsaturated soil, but its numerical implementation is more complicated. Based on the fully implicit Euler backward integration algorithm, the ABAQUS software is used to develop the established hydro-mechanical coupling constitutive model for unsaturated soil, considering the influence of micro-pore structure, and a new User-defined Material Mechanical Behavior (UMAT) subroutine is established to realize the numerical application of the proposed model. The developed numerical program is used to simulate the drying/wetting cycle process of the standard triaxial specimen. The simulation results are basically consistent with those calculated by the Fortran program, which verifies the rationality of the developed numerical program.

A Method for Predicting the Behavior of Plastics at Different Temperatures

2014 ◽  
Vol 1039 ◽  
pp. 107-111
Author(s):  
Yang Chen ◽  
Gui Qin Li ◽  
Bin Ruan ◽  
Xiao Yuan ◽  
Hong Bo Li
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Constitutive Model ◽  
Research And Development ◽  
Mechanical Behavior ◽  
Plastic Material ◽  
Different Temperatures ◽  
Plastic Parts

The mechanical behavior of plastic material is dramatically sensitive to temperature. An method is proposed to predict the mechanical behavior of plastics for cars, ranging from low-temperature low temperature ≤-40°C to high temperature ≥80°C. It dominates the behavior of plastic material based on improved constitutive model in which the parameters adjusted by a series of tests under different temperatures. The method is validated with test and establishes the basis for research and development of plastic parts for automobile as well.

Influence of drainage and root biomass on soil mechanical behavior in triaxial tests

2021 ◽  
Author(s):  
Mehtab Alam ◽  
Yuan-Jun Jiang ◽  
Muhammad Umar ◽  
Li-jun Su ◽  
Mahfuzur Rahman ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Root Biomass ◽  
Triaxial Tests

Study of Sand Production Using Geomechanical and Hydro-Mechanical Models

2018 ◽  
Vol 876 ◽  
pp. 181-186
Author(s):  
Son Tung Pham
Keyword(s):  
Production Rate ◽  
Mechanical Model ◽  
Failure Criteria ◽  
Sand Production ◽  
Geomechanical Model ◽  
Strength Failure ◽  
Rate Versus ◽  
Mechanical Models ◽  
Rock Mechanical Properties ◽  
Bottomhole Pressure

Sand production is a complicated physical process depending on rock mechanical properties and flow of fluid in the reservoir. When it comes to sand production phenomenon, many researchers applied the Geomechanical model to predict the pressure for the onset of sand production in the reservoir. However, the mass of produced sand is difficult to determine due to the complexity of rock behavior as well as fluid behavior in porous media. In order to solve this problem, there are some Hydro – Mechanical models that can evaluate sand production rate. As these models require input parameters obtained by core analysis and use a large empirical correlation, they are still not used popularly because of the diversity of reservoirs behavior in the world. In addition, the reliability of these models is still in question because no comparison between these empirical models has been studied. The onset of sand production is estimated using the bottomhole pressure that makes the maximum effective tangential compressive stress equal or higher than the rock strength (failure criteria), which is usually known as critical bottomhole pressure (CBHP). Combining with Hydro – Mechanical model, the main objective of this work aims to develop a numerical model that can solve the complexity of the governing equations relating to sand production. The outcome of this study depicts sand production rate versus time as well as the change of porosity versus space and time. In this paper, the Geomechanical model coupled with Hydro – Mechanical model is applied to calibrate the empirical parameters.

Sign in / Sign up

Export Citation Format

Share Document