Haval Hawez - Academia.edu (original) (raw)
Papers by Haval Hawez
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Journal of Natural Gas Science and Engineering, 2021
Naturally fractured reservoirs have been a source of challenging issues with regard to field deve... more Naturally fractured reservoirs have been a source of challenging issues with regard to field development, well stability, drilling, and enhanced oil recovery, as a connected fracture system can totally dominate the flow patterns. Because of the high degree of heterogeneity in flow characteristics and reservoir geomechanics, several mathematical, numerical and discretization methods are proposed to predict the hydrodynamics behaviour of naturally fractured reservoirs. This paper presents a critical review of the characteristics of naturally fractured reservoirs in terms of geomechanics and fluid flow. In the case of poorly connected fractures and high-density fractured networks, compared to the characteristic length of interest, multi-continuum approaches are widely applicable. The dual continuum approach can handle fracture matrix interaction implicitly much more conveniently than the Discrete Fracture Network (DFN) and Discrete Fracture Matrix (DFM) approaches, but it cannot capture the fracture geometry explicitly where the fracture is the main flow path in the area of interest. Distinct mathematical and numerical modelling of flow and reservoir geomechanics are also addressed in this review paper. In this context, various coupling schemes of reservoir geomechanics and fluid flow are discussed. Recent research challenges related to numerical 2 modelling of multiphase flow, reservoir geomechanics, coupling schemes, and discretisation are also reviewed. It is concluded that despite several research efforts, coupled geomechanics and multiphase flow is still a challenging issue related to mathematical, numerical models and discretisation schemes to capture the hydrodynamic behaviour, such as fracture deformation and fluid flow behaviour, at fracture matrix interaction in naturally fractured reservoirs and adopting the best modelling approach is very much dependent on the desired hydro-mechanical aspects to be investigated.
Gas condensate reservoir has been demonstrated as a highly complex phase and flow properties as a... more Gas condensate reservoir has been demonstrated as a highly complex phase and flow properties as a result of the appearance of condensate blockage near the well-bore region. This challenge can cause a significant reduction of well productivity and even seized due to decrease in pressure around the well-bore. The reduction in the reservoir pressure could be treated by shutting in the well for a period in order to build-up the reservoir pressure. Likewise, injection fluids are preferably used to maintain the reservoir pressure above dew point to avoid retrograde condensation which can result in condensate blockage. An accurate prediction should be made to achieve informed and resourceful decisions of reservoir management and sustain well productivity. In this book, the improved productivity of hydrocarbon and maintaining the reservoir pressure of a gas condensate reservoir under water, carbon dioxide and water followed by CO2 injections were studied using ECLIPSE 300 compositional rese...
Energy and Sustainability V, 2014
The majority of carbonate reservoirs have low porosity and permeability in general because of hav... more The majority of carbonate reservoirs have low porosity and permeability in general because of having a high amount of matrixes that make a heterogeneous reservoir, however high permeable layers are fractured. This study shows the effect of carbon dioxide injection on the oil recovery factor using an ECLIPSE 300 compositional reservoir simulator for 3D modelling and the change of carbonate components reaction during CO 2 injection in experimental work. In addition, a high recovery factor has been recorded during miscible CO 2 injection compared to immiscible injection. Water alternative gas (WAG) has been used as an enhanced oil recovery (EOR) method to overcome an unfavourable mobility ratio of CO 2 flooding. Miscible CO 2 injection with the aid of WAG has also had a great impact on the dissolution of carbonate components in dissolving calcite and dolomite components. Consequently, CO 2 flooding has a relatively low recovery factor without any EOR techniques such as gravity stable displacement, WAG or mobility control. CO 2 injection below minimum miscibility pressure (MMP) reduces CO 2 emission, while it takes too long time to maintain reservoir pressure. On the other hand, CO 2 flooding above MMP improves pressure maintenance; causes oil swelling, and increases the oil density.
55th U.S. Rock Mechanics/Geomechanics Symposium, Jun 18, 2021
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Journal of Natural Gas Science and Engineering, 2021
Naturally fractured reservoirs have been a source of challenging issues with regard to field deve... more Naturally fractured reservoirs have been a source of challenging issues with regard to field development, well stability, drilling, and enhanced oil recovery, as a connected fracture system can totally dominate the flow patterns. Because of the high degree of heterogeneity in flow characteristics and reservoir geomechanics, several mathematical, numerical and discretization methods are proposed to predict the hydrodynamics behaviour of naturally fractured reservoirs. This paper presents a critical review of the characteristics of naturally fractured reservoirs in terms of geomechanics and fluid flow. In the case of poorly connected fractures and high-density fractured networks, compared to the characteristic length of interest, multi-continuum approaches are widely applicable. The dual continuum approach can handle fracture matrix interaction implicitly much more conveniently than the Discrete Fracture Network (DFN) and Discrete Fracture Matrix (DFM) approaches, but it cannot capture the fracture geometry explicitly where the fracture is the main flow path in the area of interest. Distinct mathematical and numerical modelling of flow and reservoir geomechanics are also addressed in this review paper. In this context, various coupling schemes of reservoir geomechanics and fluid flow are discussed. Recent research challenges related to numerical 2 modelling of multiphase flow, reservoir geomechanics, coupling schemes, and discretisation are also reviewed. It is concluded that despite several research efforts, coupled geomechanics and multiphase flow is still a challenging issue related to mathematical, numerical models and discretisation schemes to capture the hydrodynamic behaviour, such as fracture deformation and fluid flow behaviour, at fracture matrix interaction in naturally fractured reservoirs and adopting the best modelling approach is very much dependent on the desired hydro-mechanical aspects to be investigated.
Gas condensate reservoir has been demonstrated as a highly complex phase and flow properties as a... more Gas condensate reservoir has been demonstrated as a highly complex phase and flow properties as a result of the appearance of condensate blockage near the well-bore region. This challenge can cause a significant reduction of well productivity and even seized due to decrease in pressure around the well-bore. The reduction in the reservoir pressure could be treated by shutting in the well for a period in order to build-up the reservoir pressure. Likewise, injection fluids are preferably used to maintain the reservoir pressure above dew point to avoid retrograde condensation which can result in condensate blockage. An accurate prediction should be made to achieve informed and resourceful decisions of reservoir management and sustain well productivity. In this book, the improved productivity of hydrocarbon and maintaining the reservoir pressure of a gas condensate reservoir under water, carbon dioxide and water followed by CO2 injections were studied using ECLIPSE 300 compositional rese...
Energy and Sustainability V, 2014
The majority of carbonate reservoirs have low porosity and permeability in general because of hav... more The majority of carbonate reservoirs have low porosity and permeability in general because of having a high amount of matrixes that make a heterogeneous reservoir, however high permeable layers are fractured. This study shows the effect of carbon dioxide injection on the oil recovery factor using an ECLIPSE 300 compositional reservoir simulator for 3D modelling and the change of carbonate components reaction during CO 2 injection in experimental work. In addition, a high recovery factor has been recorded during miscible CO 2 injection compared to immiscible injection. Water alternative gas (WAG) has been used as an enhanced oil recovery (EOR) method to overcome an unfavourable mobility ratio of CO 2 flooding. Miscible CO 2 injection with the aid of WAG has also had a great impact on the dissolution of carbonate components in dissolving calcite and dolomite components. Consequently, CO 2 flooding has a relatively low recovery factor without any EOR techniques such as gravity stable displacement, WAG or mobility control. CO 2 injection below minimum miscibility pressure (MMP) reduces CO 2 emission, while it takes too long time to maintain reservoir pressure. On the other hand, CO 2 flooding above MMP improves pressure maintenance; causes oil swelling, and increases the oil density.
55th U.S. Rock Mechanics/Geomechanics Symposium, Jun 18, 2021