Analysis of flow behavior in fractured lithophysal reservoirs

Liu, Jianchun; Bodvarsson, G.S.; Wu, Yu‐Shu

doi:10.1016/s0169-7722(02)00169-9

Cited by 73 publications

(36 citation statements)

References 22 publications

(33 reference statements)

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“…This system is so-called triple porosity system. Al-Ghamdi and Ershaghi (1996) initiatively proposed the dual fracture triple-porosity model for radial flow [10], and then Liu et al (2003), Wu et al (2004) and Dreier (2004) enriched the triple-porosity model [11][12][13], but unfortunately these model still did not considerate the impact of adsorption and diffusion. However, the linear flow stage are apparently identified in some real productivity curves, especially for these fractured reservoirs, therefore, the linear flow models for shale gas are proposed by some scholars.…”

Section: Introductionmentioning

confidence: 99%

Productivity Model for Shale Gas Reservoir with Comprehensive Consideration of Multi-mechanisms

Deng¹,

Guo²,

Tian³

et al. 2015

TOPEJ

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Multi-stage fracturing horizontal well currently has been proved to be the most effective method to produce shale gas. This method can activate the natural fractures system defined as stimulated reservoir volume (SRV), the remaining region similarly is defined as un-stimulated reservoir volume (USRV). At present, no type curves have been developed for hydraulic fractured shale gas reservoirs in which the SRV zone has triple-porosity dual-depletion flow behavior and the USRV zone has double porosity flow behavior. In this paper, the SRV zone and USRV zone respectively are simplified as cubic triple-porosity and slab dual porosity media. We have established a new productivity model for multifractured horizontal well shale gas with Comprehensive consideration of desorption, diffusion, viscous flow, stress sensitivity and dual-depletion mechanism in matrix. The rate transient responses are inverted into real time space with stehfest numerical inversion algorithm. Type curves are plotted, and different flow regimes in shale gas reservoirs are identified. Effects of relevant parameters are analyzed as well. The whole flow period can be divided into 8 regimes: bilinear flow in SRV; pseudo elliptic flow; dual inter-porosity flow; transitional flow; linear flow in USRV; inter-porosity flow and boundary-dominated flow. The stress sensitivity basically has negative influence on the whole productivity period .The less the value of Langmuir volume and the lager the value of Langmuir pressure, the more lately the inter-porosity flow and boundary-dominated flow occurs. It in concluded that the USRV zone has positive influence on production and could not be ignored.

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Section: Introductionmentioning

confidence: 99%

Productivity Model for Shale Gas Reservoir with Comprehensive Consideration of Multi-mechanisms

Deng¹,

Guo²,

Tian³

et al. 2015

TOPEJ

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“…Triple-porosity models for such reservoirs have been proposed by different authors [7][8][9][10][11][12][13] as extensions to the double-porosity model of Warren and Root [14]. Among these models the one presented by Camacho et al in [10] is the only one that considers primary flow in both networks of fractures and vugs, and it is a triple porosity-dual permeability model.…”

Section: Introductionmentioning

confidence: 99%

Well Test Analysis of Naturally Fractured Vuggy Reservoirs with an Analytical Triple Porosity – Double Permeability Model and a Global Optimization Method

Gómez¹,

Ramos²,

Mesejo

et al. 2014

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Geosciences Numerical Methods Modélisation numérique en géosciencesOil & Gas Science and Technology -Rev. IFP Energies nouvelles, Vol. 69 (2014), No. 4, Copyright © 2014, IFP Energies nouvelles > EditorialJ. E. Roberts > Modeling Fractures in a Poro-Elastic MediumUn modèle de fracture dans un milieu poro-élastique > Modeling Fluid Flow in Faulted BasinsModélisation des transferts fluides dans les bassins faillés Re´sume´-Analyse des puits d'essai de re´servoirs vacuolaires naturellement fracture´s avec un mode`le de triple porosite´-double perme´abilite´et une me´thode d'optimisation globale -L'objectif de ce travail est l'e´tude de la caracte´risation automatique de re´servoirs de pe´trole fracture´s ve´siculaires via l'analyse des puits d'essai, avec un mode`le de triple porosite´et de perme´abilite´double. Les parame`tres qui doivent eˆtre identifie´s comme ceux du mode`le, sont l'e´coulement entre les trois media, les ratios de stockage, la porosite´, le ratio de perme´abilite´, l'effet de stockage, la perme´abilite´de peau et totale. Dans ce travail, nous avons effectueĺ 'interpre´tation de l'essai dans l'espace de Laplace, en utilisant des algorithmes nume´riques pour transfe´rer les donne´es obtenues dans un espace de temps complet en un espace de Laplace. Le proble`me de l'interpre´tation des tests dans l'espace de Laplace est pose´comme un proble`me d'optimisation des moindres carre´s non line´aires avec boıˆte contrainte et ine´galite´line´aire contrainte, ce qui est ge´ne´ralement re´solu en utilisant des me´thodes de type Newton avec une re´gion de confiance. Cependant, les me´thodes locales comme celle utilise´e dans notre travail appele´e TRON, ou la me´thode bien connue de Levenberg-Marquardt, ne sont pas souvent en mesure de trouver une solution optimale avec un bon ajustement des donne´es. É galement la caracte´risation automatique des re´servoirs du pe´trole fracture´s vacuolaires via l'analyse des puits d'essai avec le mode`le de porosite´-perme´abilite´a`double triple, peut, comme la plupart des proble`mes inverses, donner des solutions multiples avec une bonne corre´lation des donne´es. Pour faire face a`ces spe´cificite´s, nous avons utilise´une approche avec la me´thode d'optimisation globale appele´e Tunneling Method (TM). Dans l'adaptation de l'algorithme, nous prenons en compte des proble`mes comme le fait que le l'estimation des parame`tres doit eˆtre formule´e avec une grande pre´cision, comme la pre´sence de bruit dans les mesures et comme la ne´cessite´de re´soudre le proble`me de calcul rapidement. Nous de´montrons dans cette e´tude que l'utilisation de TM est une alternative efficace et robuste pour re´soudre la caracte´risation des puits d'essai, du fait que plusieurs solutions avec un bon ajustement aux donne´es aient e´te´obtenues.Oil & Gas Science and Technology -Rev. IFP Energies nouvelles, Vol. 69 (2014), No. 4, pp. 653-671 Copyright Ó 2014, IFP Energies nouvelles DOI: 10.2516 Abstract -Well Test Analysis of Naturally Fractured Vuggy Reservoirs with an Analytical Triple P...

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“…In particular, Liu et al (2003) and Camacho-Velazquez et al (2005) present several new triple-continuum models for single-phase flow in a fracture-matrix system that include cavities within the rock matrix (as an additional porous portion of the matrix). In general, these models have focused on handling the heterogeneity of the rock matrix or fractures, e.g., subdividing the rock matrix or fractures into two or more subdomains with different properties.…”

Section: Introductionmentioning

confidence: 99%

Development of Hydrologic Characterization Technology of Fault Zones

Karasaki¹,

Onishi²,

Wu³

2008

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Executive SummaryThis is the year-end report of the first year of the NUMO-LBNL collaborative project: Development of Hydrologic Characterization Technology of Fault Zones under NUMO-DOE/LBNL collaboration agreement, the task description of which can be found in the Appendix.Literature survey is conducted to study past works that relate geology to hydrology of fault zones. This includes study in sediments, sedimentary and crystalline (igneous and metamorphic) rocks with examples from various parts of the world. We focus on studies of hydrology of fault zones in the field and the laboratory as well as through modeling performed in all types of faults (i.e. normal, thrust and reverse, and strike-slip). We find that there is very limited amount of work on the subject, particularly in the field using borehole testing. The common elements of a fault include a core, and damage zones. The core usually acts as a barrier to the flow across it, whereas the damage zone controls the flow either parallel to the strike or dip of a fault. In most of cases the damage zone is the one that is controlling the flow in the fault zone and the surroundings. The permeability of damage zone is in the range of two to three orders of magnitude higher than the protolith. The fault core can have permeability up to seven orders of magnitude lower than the damage zone. In general, most fault studies in the literature fit into combinedconduit barrier classification by Caine et al., 1996.The main results are listed in three tables which summarize the main geological, structural and hydrological characteristics for each type of fault. At the end of the chapter, we suggest a characterization strategy for classifying faults based on available information (i.e. stress field, scaling relationship, fluid flow concentrated on one side of a fault) The fault types (normal, reverse, and strike-slip) by themselves do not appear to be a clear classifier of the hydrology of fault zones. However, there still remains a possibility that other additional geologic attributes and scaling relationships can be used to predict or bracket the range of hydrologic behavior of fault zones. We identify potential U.S. locations to conduct analogue studies and to extend the current effort on fault zone classification and development of characterization technology.Next we examine in the literature the characterization technologies employed and the information used to identify the hydrologic properties of faults. The findings are listed by the location. AMT(Audio frequency Magneto Telluric) and seismic reflection techniques are often used to locate faults. In some cases AMT results are successfully used to infer the hydrologic properties. Geochemical signatures and temperature distributions are often used to identify flow domains and/or directions. ALSM(Airborne Laser Swath Mapping) or LIDAR (Light Detection and Ranging) method may prove to be a powerful tool for identifying lineaments in place of the traditional photogrammetry. Nonetheless not much work has been done to cha...

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Analysis of flow behavior in fractured lithophysal reservoirs

Cited by 73 publications

References 22 publications

Productivity Model for Shale Gas Reservoir with Comprehensive Consideration of Multi-mechanisms

Productivity Model for Shale Gas Reservoir with Comprehensive Consideration of Multi-mechanisms

Well Test Analysis of Naturally Fractured Vuggy Reservoirs with an Analytical Triple Porosity – Double Permeability Model and a Global Optimization Method

Development of Hydrologic Characterization Technology of Fault Zones

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