Pub Date : 2019-11-25DOI: 10.3997/2214-4609.2019x621027
H. Pourpak, A. Padin
Summary In this work, we concept-proved a core-to-log methodology that provides a fast calibration method for log-based elasticity. We measured rebound hardness in parallel to dynamic measurements of ultrasonic surface wave velocities (P and S) at the milimetric scale, then calibrated the results with discrete triaxial tests performed on plugs, representing all relevant lithological facies, and finally compared the results against log-based parameters. Our work shows that such integration helps at developing robust core-tolog elasticity relationships in the entire core length, eventually providing a proper foundation for better stiffness model prediction, at a fraction of the cost and time of traditional core acquisition programs. We have shown that calibrated high-resolution measurements at the core scale may be used to create accurate dynamic to static correlations, to identify and characterize potential barriers to fracture growth, and to characterize lithological facies for predicting their elastic properties at new wells when core data is not available.
{"title":"High-resolution Mechanical Earth Models in Highly Laminated Formations. Measuring Elastic Properties at the Centimetric Scale","authors":"H. Pourpak, A. Padin","doi":"10.3997/2214-4609.2019x621027","DOIUrl":"https://doi.org/10.3997/2214-4609.2019x621027","url":null,"abstract":"Summary In this work, we concept-proved a core-to-log methodology that provides a fast calibration method for log-based elasticity. We measured rebound hardness in parallel to dynamic measurements of ultrasonic surface wave velocities (P and S) at the milimetric scale, then calibrated the results with discrete triaxial tests performed on plugs, representing all relevant lithological facies, and finally compared the results against log-based parameters. Our work shows that such integration helps at developing robust core-tolog elasticity relationships in the entire core length, eventually providing a proper foundation for better stiffness model prediction, at a fraction of the cost and time of traditional core acquisition programs. We have shown that calibrated high-resolution measurements at the core scale may be used to create accurate dynamic to static correlations, to identify and characterize potential barriers to fracture growth, and to characterize lithological facies for predicting their elastic properties at new wells when core data is not available.","PeriodicalId":285776,"journal":{"name":"Fifth EAGE/AAPG Tight Reservoirs Workshop","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123102172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-25DOI: 10.3997/2214-4609.2019x621021
Shyam Shankar, R. Jalil, M. Al-Rabah, F. Chang
Summary The possibility of utilizing seawater in hydraulic fracturing operations can help preserve fresh water consumption. To address this challenge, a visco-elastic surfactant (VES) based seawater fracturing fluid has been formulated for a variety of fracturing applications and elevated reservoir temperatures. The rheological behavior of this fluid, the compatibility with reservoir fluids, and the relevance of common fracturing fluid additives were studied and presented. The resulting fluids showed superior fracture cleanup with stable rheology and controllable break profiles, non-scaling when mixed with formation brine, and no other adverse interactions that could potentially affect formation permeability when mixed with hydrocarbon in the reservoir.
{"title":"Sea water compatible viscoelastic surfactant gels as an alternative to Linear and Crosslinked fracturing fluids","authors":"Shyam Shankar, R. Jalil, M. Al-Rabah, F. Chang","doi":"10.3997/2214-4609.2019x621021","DOIUrl":"https://doi.org/10.3997/2214-4609.2019x621021","url":null,"abstract":"Summary The possibility of utilizing seawater in hydraulic fracturing operations can help preserve fresh water consumption. To address this challenge, a visco-elastic surfactant (VES) based seawater fracturing fluid has been formulated for a variety of fracturing applications and elevated reservoir temperatures. The rheological behavior of this fluid, the compatibility with reservoir fluids, and the relevance of common fracturing fluid additives were studied and presented. The resulting fluids showed superior fracture cleanup with stable rheology and controllable break profiles, non-scaling when mixed with formation brine, and no other adverse interactions that could potentially affect formation permeability when mixed with hydrocarbon in the reservoir.","PeriodicalId":285776,"journal":{"name":"Fifth EAGE/AAPG Tight Reservoirs Workshop","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124740644","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-25DOI: 10.3997/2214-4609.2019x621008
J. V. Dijk, A. Ajayi, L. D. Vincenzi, H. Ellen, Hasan Guney, P. Holloway, M. Khdhaouria
Summary A fully integrated multidisciplinary workflow has been applied using up to date technologies in order to prove deliverability of already discovered and proven resources, and explore for new (Palaeozoic and basement) reservoir levels and other prospects in the areas of Tinrhert (Ilizzi-Berkine Basin) and M’Sari Akabli (Ahnet Basin) Blocks. Extensive analyses of vintage 2d and 3d seismic data and previously drilled wells has been performed over the last 4 years. New 2d seismic data were acquired and vintage 3d seismic data have been reprocessed in various phases. The multiscale workflow presented shows the results of seismic mapping and depth modeling, seismic attribute analyses, well log correlation, image log analyses including stress field analyses, core data and remote sensing data analyses. Completely new approaches are outlined regarding the multiscale treatment of remote sensing data regarding fractures and faults, and regarding data driven DFFN modeling in the 3d domain. The results constitute a solid backbone for the planning of future appraisal wells in this complex and challenging geological environment.
{"title":"Paleozoic Tight Reservoirs in Algeria; Fault and Fracture Network Modeling in a Challenging Complex Geological Environment","authors":"J. V. Dijk, A. Ajayi, L. D. Vincenzi, H. Ellen, Hasan Guney, P. Holloway, M. Khdhaouria","doi":"10.3997/2214-4609.2019x621008","DOIUrl":"https://doi.org/10.3997/2214-4609.2019x621008","url":null,"abstract":"Summary A fully integrated multidisciplinary workflow has been applied using up to date technologies in order to prove deliverability of already discovered and proven resources, and explore for new (Palaeozoic and basement) reservoir levels and other prospects in the areas of Tinrhert (Ilizzi-Berkine Basin) and M’Sari Akabli (Ahnet Basin) Blocks. Extensive analyses of vintage 2d and 3d seismic data and previously drilled wells has been performed over the last 4 years. New 2d seismic data were acquired and vintage 3d seismic data have been reprocessed in various phases. The multiscale workflow presented shows the results of seismic mapping and depth modeling, seismic attribute analyses, well log correlation, image log analyses including stress field analyses, core data and remote sensing data analyses. Completely new approaches are outlined regarding the multiscale treatment of remote sensing data regarding fractures and faults, and regarding data driven DFFN modeling in the 3d domain. The results constitute a solid backbone for the planning of future appraisal wells in this complex and challenging geological environment.","PeriodicalId":285776,"journal":{"name":"Fifth EAGE/AAPG Tight Reservoirs Workshop","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121090489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-11-25DOI: 10.3997/2214-4609.2019x621025
D. Rezig
Summary The fracture characterization-based borehole image provides information about the fracture morphology (Open, cemented, induced, …) and in case of water-based mud, fracture aperture can be estimated using electrical image (FMI*). Fracture apertures processing based on the measured excess current as the tool crossed the fracture. The aperture calculation follows an equation published by Luthi and Souhaite, 1990. The Acoustic measurement (Sonic Scanner) determine anisotropy which can be classified as stress induced fractures, intrinsic anisotropy (Natural open Fracture, Layers) using dispersion plots. The ability of Sonic Scanner to distinguish between open and close fractures, refine the fracture identification from borehole image and provides accurate open fracture sets that can be used for fracture aperture estimation. This approach was applied in Algeria (for Tight gas sandstones reservoirs and the highest dry gas potential in the Sahara region) having as objective to provide client estimated value of fracture aperture to update their DFN model.
{"title":"Fracture aperture estimation using electrical image logs (FMI)and Acoustic (SS)","authors":"D. Rezig","doi":"10.3997/2214-4609.2019x621025","DOIUrl":"https://doi.org/10.3997/2214-4609.2019x621025","url":null,"abstract":"Summary The fracture characterization-based borehole image provides information about the fracture morphology (Open, cemented, induced, …) and in case of water-based mud, fracture aperture can be estimated using electrical image (FMI*). Fracture apertures processing based on the measured excess current as the tool crossed the fracture. The aperture calculation follows an equation published by Luthi and Souhaite, 1990. The Acoustic measurement (Sonic Scanner) determine anisotropy which can be classified as stress induced fractures, intrinsic anisotropy (Natural open Fracture, Layers) using dispersion plots. The ability of Sonic Scanner to distinguish between open and close fractures, refine the fracture identification from borehole image and provides accurate open fracture sets that can be used for fracture aperture estimation. This approach was applied in Algeria (for Tight gas sandstones reservoirs and the highest dry gas potential in the Sahara region) having as objective to provide client estimated value of fracture aperture to update their DFN model.","PeriodicalId":285776,"journal":{"name":"Fifth EAGE/AAPG Tight Reservoirs Workshop","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134308799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3997/2214-4609.2019x621012
Briceño Montilla M.J., S. Wu
{"title":"Deterministic facies modelling in tight gas reservoirs based on the architectural elements of the fluvial deposits","authors":"Briceño Montilla M.J., S. Wu","doi":"10.3997/2214-4609.2019x621012","DOIUrl":"https://doi.org/10.3997/2214-4609.2019x621012","url":null,"abstract":"","PeriodicalId":285776,"journal":{"name":"Fifth EAGE/AAPG Tight Reservoirs Workshop","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128439928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3997/2214-4609.2019x621026
H. Pourpak, J. Will, S. Eckardt
{"title":"Optimization Of Hydraulic Fracturing Operations and Production of Shale/Tight Reservoirs Considering operational Costs and Benefits","authors":"H. Pourpak, J. Will, S. Eckardt","doi":"10.3997/2214-4609.2019x621026","DOIUrl":"https://doi.org/10.3997/2214-4609.2019x621026","url":null,"abstract":"","PeriodicalId":285776,"journal":{"name":"Fifth EAGE/AAPG Tight Reservoirs Workshop","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125742242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.3997/2214-4609.2019x621028
S. Saha, A. Shinde, S. Perumalla
{"title":"Permeability enhancement in a fractured reservoir through critically stress fracture analysis and stimulation zone optimization","authors":"S. Saha, A. Shinde, S. Perumalla","doi":"10.3997/2214-4609.2019x621028","DOIUrl":"https://doi.org/10.3997/2214-4609.2019x621028","url":null,"abstract":"","PeriodicalId":285776,"journal":{"name":"Fifth EAGE/AAPG Tight Reservoirs Workshop","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123711206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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