Publications
542 results found
Batycky RP, Blunt MJ, Thiele MR, 1996, A 3D Multipurpose Streamline Simulator with Gravity and Changing Well Conditions, 17th IEA Collaborative Project on Enhanced Oil Recovery Workshop and Symposium, Sydney, Australia, September 30 - October 2
King MJ, Blunt MJ, Mansfield M, et al., 1995, Rapid evaluation of the impact of heterogeneity on miscible gas injection, Geological Society Special Publication, Vol: 84, Pages: 133-142, ISSN: 0305-8719
To predict and manage petroleum production there are two challenges: first, to generate and utilize tremendous detail in our reservoir description and second, to recognize that the majority of this detail is uncertain. Techniques, therefore, are needed to assess uncertainty while making predictions of oil, water, and gas production. We demonstrate that by using a mixture of old and new techniques (streamlines and fine grid simulation) we obtain the speed of the first while retaining the rigour and accuracy of the second. The method is applied to the rapid evaluation of the impact of reservoir heterogeneity on miscible gas injection. © 1995 The Geological Society.
BLUNT MJ, SCHER H, 1995, PORE-LEVEL MODELING OF WETTING, PHYSICAL REVIEW E, Vol: 52, Pages: 6387-6403, ISSN: 1063-651X
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- Citations: 257
BLUNT M, ZHOU DG, FENWICK D, 1995, 3-PHASE FLOW AND GRAVITY DRAINAGE IN POROUS-MEDIA, TRANSPORT IN POROUS MEDIA, Vol: 20, Pages: 77-103, ISSN: 0169-3913
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- Citations: 99
THIELE MR, BLUNT MJ, ORR FM, 1995, MODELING FLOW IN HETEROGENEOUS MEDIA USING STREAMTUBES .1. MISCIBLE AND IMMISCIBLE DISPLACEMENTS, IN SITU, Vol: 19, Pages: 299-339, ISSN: 0146-2520
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- Citations: 19
BLUNT MJ, BARKER JW, RUBIN B, et al., 1994, PREDICTIVE THEORY FOR VISCOUS FINGERING IN COMPOSITIONAL DISPLACEMENT, SPE RESERVOIR ENGINEERING, Vol: 9, Pages: 73-80, ISSN: 0885-9248
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- Citations: 31
Blunt M, Christie M, 1994, Theory of viscous fingering in two phase, three component flow, SPE Advanced Technology Series, Vol: 2, Pages: 52-60
When a mobile fluid, such as gas, displaces less mobile fluids, such as oil and water, a viscous instability develops and the injected fluid fingers through the system leading to early breakthrough and poor recovery. In a WAG process (Water Alternate Gas) water and a miscible solvent (gas) are injected into a reservoir containing water and oil. Compared with a miscible flood, when only solvent is injected, fingering can be suppressed by the simultaneous injection of water, if it reduces the apparent mobility contrast between the injected and displaced fluids. In order to understand and control this instability, it is necessary to be able to predict the expected extent of fingering. The behavior of a miscible flood, with only hydrocarbon flowing, can be modeled successfully using a Todd & Longstaff fractional flow. We modify the Todd and Longstaff model self-consistently to account for fingering in multi-component systems. The method is verified for WAG floods. The empirical flow equations are solved analytically in one dimension and the results are in excellent agreement with the averaged saturation and concentration profiles computed using two dimensional high resolution simulation, for a variety of injected water saturations, in both secondary and tertiary displacements.
Thiele MR, Blunt MJ, Orr FM, 1994, New technique for predicting flow in heterogeneous systems using stream tubes, Pages: 521-582
We present a fast technique for modeling convective displacements which are dominated by large scale reservoir heterogeneities. The direction of flow at any time during the displacement is mapped by stream tubes, which are recalculated as the fluid mobility distribution changes. A one dimensional solution is then mapped along each streamtube as a Riemann solution. The Riemann approach allows for the rapid computation of flow using two to three orders of magnitude fewer matrix inversions than traditional finite difference simulators. The resulting two dimensional solutions are free from numerical diffusion and can include the effects of gravity, any type of multiphase, multicomponent compositional process and longitudinal physical diffusion, but cannot account for transverse physical diffusion or mixing due to viscous or capillary cross-flow. We test our techniques on immiscible and ideal miscible displacements through a variety of two dimensional heterogeneous systems. We show that the Riemann technique is accurate and converges in less than 1% of the time taken by conventional finite difference simulators.
Blunt MJ, Fenwick DH, Zhou D, 1994, What determines residual oil saturation in three-phase flow, Pages: 371-380
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- Citations: 40
BLUNT M, CHRISTIE M, 1993, HOW TO PREDICT VISCOUS FINGERING IN 3 COMPONENT FLOW, TRANSPORT IN POROUS MEDIA, Vol: 12, Pages: 207-236, ISSN: 0169-3913
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- Citations: 23
BLUNT M, FAYERS FJ, ORR FM, 1993, CARBON-DIOXIDE IN ENHANCED OIL-RECOVERY, ENERGY CONVERSION AND MANAGEMENT, Vol: 34, Pages: 1197-1204, ISSN: 0196-8904
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- Citations: 258
King MJ, Blunt MJ, Mansfield MM, et al., 1993, Rapid evaluation of the impact of heterogeneity on miscible gas injection, Pages: 495-504
To predict and manage petroleum production there are two challenges: (i) to generate and utilize tremendous detail in our reservoir description (ii) to recognize that the majority of this detail is uncertain. Techniques, therefore, are necessary to assess uncertainty while making predictions of oil, water, and gas production. We demonstrate that by using a mixture of old and new techniques (streamlines and fine grid simulation) that we obtain the speed of the first while retaining the rigor and accuracy of the second. The method is applied to the rapid evaluation of the impact of reservoir heterogeneity on miscible gas injection.
Rubin B, Barker JW, Blunt MJ, et al., 1993, Compositional reservoir simulation with a predictive model for viscous fingering, Pages: 15-24
This paper describes how an empirical model of compositional viscous fingering can be implemented in a conventional compositional reservoir simulator without major changes to the code. The empirical model is used to calculate pseudo relative permeabilities, transport coefficients (`α-factors') and a new density coefficient (`β-factor') which are used as input to the modified simulator. The modified simulator predicts the average behaviour of a variety of unstable gas displacement processes. The results are shown to be in excellent agreement with those of conventional compositional simulations which resolve the fingering explicitly.
BLUNT M, KING MJ, SCHER H, 1992, SIMULATION AND THEORY OF 2-PHASE FLOW IN POROUS-MEDIA, PHYSICAL REVIEW A, Vol: 46, Pages: 7680-7699, ISSN: 1050-2947
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- Citations: 211
Blunt MJ, Barker JW, Mansfield M, et al., 1992, Predictive theory for viscous fingering in compostional displacement, Pages: 239-252
Viscous fingering is traditionally accounted for by models that assume complete miscibility, such as the Todd and Longstaff model. In many gas injection projects, miscibility is not attained, and a compositional description must be used to represent adequately the dominant recovery mechanisms. We present a theory of compositional viscous fingering with no adjustable parameters which reduces to the Todd and Longstaff model for miscible floods. The theory is based on a characteristic analysis of the one dimensional component conservation equations from which we identify unstable fronts or discontinuities. In a multidimensional displacement the instability at the front causes a convective mixing of compositions on either side of the discontinuity which is driven by the total mobility contrast across the fingered region. The theory gives excellent predictive agreement with simulation results for a wide range of recovery processes from high pressure condensing and vaporizing gas drives with significant levels of fingering to low pressure immiscible gas floods with only a small degree of fingering. The high resolution compositional simulations used to validate the theory are the first to resolve viscous fingering adequately in other than miscible flow. The results presented are obtained using second order accurate numerical schemes on grids of up to 400 × 150 blocks; grid refinement studies show that this is adequate to ensure statistical reproducibility of the results.
BLUNT M, RUBIN B, 1992, IMPLICIT FLUX LIMITING SCHEMES FOR PETROLEUM RESERVOIR SIMULATION, JOURNAL OF COMPUTATIONAL PHYSICS, Vol: 102, Pages: 194-210, ISSN: 0021-9991
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- Citations: 53
BRYANT S, BLUNT M, 1992, PREDICTION OF RELATIVE PERMEABILITY IN SIMPLE POROUS-MEDIA, PHYSICAL REVIEW A, Vol: 46, Pages: 2004-2011, ISSN: 1050-2947
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- Citations: 377
Fayers FJ, Blunt MJ, Christie MA, 1992, Comparison of empirical viscous-fingering models and their calibration for heterogenous problems, SPE Reservoir Engineering (Society of Petroleum Engineers), Vol: 7, Pages: 195-203, ISSN: 0885-9248
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- Citations: 33
BLUNT M, KING P, 1991, RELATIVE PERMEABILITIES FROM 2-DIMENSIONAL AND 3-DIMENSIONAL PORE-SCALE NETWORK MODELING, TRANSPORT IN POROUS MEDIA, Vol: 6, Pages: 407-433, ISSN: 0169-3913
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- Citations: 216
Rubin B, Blunt MJ, 1991, Higher-order implicit flux limiting schemes for black oil simulation, Pages: 219-229
The authors derive a total variation diminishing (TVD) higher order scheme which can be applied to both fully implicit and IMPES Black-Oil models. We develop IMPES and fully implicit analogues of these schemes for use in standard Black Oil models and discuss their relationship to commonly used mobility weighting schemes (mid-point, single-point upstream, two-point upstream and single-point downstream). The TVD mid-point scheme is a temporally first order version of the second order TVD flux limited Lax-Wendroff scheme. The TVD criterion ensures that oscillations which would have been produced by unconstrained second order schemes never arise. The unconditional stability of the fully implicit TVD mid-point scheme is guaranteed, since the limiter is evaluated along with the fully implicit flux terms. The IMPES implementation has a stability limit which is half that of the first order single-point upstream scheme. Results using the IMPES and implicit TVD scheme in a modified commercial Black Oil code (VIP) are presented for three test problems.
Blunt MJ, Christie MA, 1991, Exact solutions for viscous fingering in two-phase, three-component flow, Pages: 199-209
When a mobile fluid, such as gas, displaces less mobile fluids, such as oil and water, a viscous instability develops and the injected fluid fingers through the system leading to early breakthrough and poor recovery. In a WAG process (Water Alternate Gas) water and a miscible solvent (gas) are injected into a reservoir containing water and oil. Compared with a miscible flood, when only solvent is injected, fingering can be supressed by the simultaneous injection of water, if it reduces the apparent mobility contrast between the injected and displaced fluids. In order to understand and control this instability, it is necessary to be able to predict the expected extent of fingering. The behaviour of a miscible flood, with only hydrocarbon flowing, can be modelled successfully using a Todd and Longstaff fractional flow. We modify the Todd and Longstaff model self-consistently to account for fingering in multi-component systems. The method is verified for WAG floods.
BALL R, BLUNT M, 1990, DYNAMICS OF SCREENING IN MULTIFRACTAL GROWTH, PHYSICAL REVIEW A, Vol: 41, Pages: 582-589, ISSN: 1050-2947
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- Citations: 3
Blunt MJ, King PR, 1990, Macroscopic parameters from simulations of pore scale flow, Physical Review A, Vol: 42, Pages: 4780-4787
BALL RC, BLUNT M, BARFORD W, 1989, CAN SURFACE BOUND-STATES BE INDUCED BY INTERFACIAL ROUGHNESS, JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, Vol: 22, Pages: 2587-2595, ISSN: 0305-4470
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- Citations: 35
BLUNT M, 1989, HYDRODYNAMIC FORCE DISTRIBUTION ON A FRACTAL CLUSTER, PHYSICAL REVIEW A, Vol: 39, Pages: 5801-5806, ISSN: 1050-2947
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- Citations: 6
BLUNT M, 1989, THE IMPEDANCE OF A SELF-AFFINE SURFACE, JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, Vol: 22, Pages: 1179-1192, ISSN: 0305-4470
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- Citations: 24
BALL R, BLUNT M, 1989, SCREENING IN MULTIFRACTAL GROWTH, PHYSICAL REVIEW A, Vol: 39, Pages: 3591-3596, ISSN: 1050-2947
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- Citations: 16
BLUNT M, 1989, GEOMETRY OF MULTIFRACTAL SYSTEMS, PHYSICAL REVIEW A, Vol: 39, Pages: 2780-2782, ISSN: 1050-2947
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- Citations: 8
BLUNT M, BARFORD W, BALL R, 1989, POLYMER ADSORPTION AND ELECTRON-BINDING ON ROUGH AND FRACTAL SURFACES, MACROMOLECULES, Vol: 22, Pages: 1458-1466, ISSN: 0024-9297
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- Citations: 33
BALL R, BLUNT M, 1988, A FRACTAL MODEL FOR THE IMPEDANCE OF A ROUGH-SURFACE, JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, Vol: 21, Pages: 197-204, ISSN: 0305-4470
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- Citations: 46
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