Pub Date : 2019-06-03DOI: 10.3997/2214-4609.201901334
M. Jacobs, P. Farrimond, J. Bagguley, M. Gall
Summary This abstract provides an overview of the workflows and methodologies implemented in generating a UKCS wide geochemical and geological database, to be used in conducting petroleum systems analysis. As a truly integrated study, it provides a rationale to the various technical scopes involved in executing the work and shows the value in bringing these various results together into an integrated database to be used by industry and academia. The results of this study provide a unique tool to improve subsurface understanding across the UKCS, and assist in the continued drive to enhance exploration and development opportunities in all areas of the UKCS.
{"title":"Geochemical and Geological Database to Enhance Petroleum Systems Analysis on the UKCS","authors":"M. Jacobs, P. Farrimond, J. Bagguley, M. Gall","doi":"10.3997/2214-4609.201901334","DOIUrl":"https://doi.org/10.3997/2214-4609.201901334","url":null,"abstract":"Summary This abstract provides an overview of the workflows and methodologies implemented in generating a UKCS wide geochemical and geological database, to be used in conducting petroleum systems analysis. As a truly integrated study, it provides a rationale to the various technical scopes involved in executing the work and shows the value in bringing these various results together into an integrated database to be used by industry and academia. The results of this study provide a unique tool to improve subsurface understanding across the UKCS, and assist in the continued drive to enhance exploration and development opportunities in all areas of the UKCS.","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"106 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86249775","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 : 2019-06-03DOI: 10.3997/2214-4609.201900956
M. Konstantinopoulos, I. D. P. Torrijos, Isaac Klewiah, S. Strand, T. Puntervold
Summary Carbonate rock wettability is influenced by polar components in the crude oil, rock mineralogy and brine composition. Previous studies on chalk suggest that exposure of a large amount of acidic crude oil to core material reduces water wetness, thus affecting the ultimate oil recovery achieved during waterflooding. Presence of silica in the pore space appears to affect the wetting state of chalk toward more water-wet conditions. This study evaluates the wetting effect of crude oil exposure on the silica-rich Aalborg chalk, and its impact on oil recovery. Spontaneous imbibition and forced imbibition tests have been conducted at 50 °C to evaluate initial wetting and its effect on oil recovery from three silica-rich (6.8 At%) outcrop Aalborg chalk cores. Various amounts of crude oil was injected during core preparation, and it was observed that as the amount of crude oil injected increased, less water-wet conditions were obtained. A higher degree of water wetness in the Aalborg chalk core promoted higher ultimate oil recovery under forced imbibition than that previously reported for Stevns Klint chalk, containing low silica content. It was concluded that the silica content in the core induced a more water-wet wetting state in the core.
碳酸盐岩润湿性受原油极性组分、岩石矿物学和盐水组成的影响。以往对白垩岩的研究表明，大量酸性原油暴露于岩心物质中会降低水的湿度，从而影响注水时的最终采收率。孔隙空间中二氧化硅的存在似乎会影响白垩的润湿状态，使其更趋向于水湿状态。研究了原油暴露对富硅alborg白垩系的润湿作用及其对采收率的影响。在50°C条件下进行了自发渗吸和强制渗吸试验，以评估三个富硅(6.8 at %)露头奥尔堡白垩岩心的初始润湿及其对采收率的影响。在岩心制备过程中注入不同量的原油，观察到随着注入原油量的增加，获得的水湿条件越来越少。与之前报道的含有低硅含量的Stevns Klint白垩土相比，alborg白垩土岩心中较高的水分湿润程度提高了强制渗吸下的最终采收率。结果表明，岩心中二氧化硅的含量导致了岩心的湿润状态。
{"title":"Effect of Mineralogy on Initial Wettability and Oil Recovery from Silica-containing Chalk","authors":"M. Konstantinopoulos, I. D. P. Torrijos, Isaac Klewiah, S. Strand, T. Puntervold","doi":"10.3997/2214-4609.201900956","DOIUrl":"https://doi.org/10.3997/2214-4609.201900956","url":null,"abstract":"Summary Carbonate rock wettability is influenced by polar components in the crude oil, rock mineralogy and brine composition. Previous studies on chalk suggest that exposure of a large amount of acidic crude oil to core material reduces water wetness, thus affecting the ultimate oil recovery achieved during waterflooding. Presence of silica in the pore space appears to affect the wetting state of chalk toward more water-wet conditions. This study evaluates the wetting effect of crude oil exposure on the silica-rich Aalborg chalk, and its impact on oil recovery. Spontaneous imbibition and forced imbibition tests have been conducted at 50 °C to evaluate initial wetting and its effect on oil recovery from three silica-rich (6.8 At%) outcrop Aalborg chalk cores. Various amounts of crude oil was injected during core preparation, and it was observed that as the amount of crude oil injected increased, less water-wet conditions were obtained. A higher degree of water wetness in the Aalborg chalk core promoted higher ultimate oil recovery under forced imbibition than that previously reported for Stevns Klint chalk, containing low silica content. It was concluded that the silica content in the core induced a more water-wet wetting state in the core.","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82856526","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 : 2019-06-03DOI: 10.3997/2214-4609.201901474
S. Oppert, Fnu Suleen
Summary Time-Lapse (4D) seismic data is used in conjunction with Pressure Transient Analysis (PTA) to quantify the extent and shape of waterflood fronts in a deep-water Gulf of Mexico case study. The waterflood front positions are interpreted on 4D seismic amplitude difference maps and the flood front is modelled in analytical PTA. The asymmetric flood front is investigated in a numerical PTA model and parameter sensitivities for matching both the 4D seismic interpretation and the pressure falloffs tests are explored. The workflow allows for iterations in the interpretation of the 4D flood front as well as updates to the parameters used in the numerical PTA until a satisfactory model is created which matches both the 4D seismic data and the pressure falloffs used in PTA. Together, the joint iterative analysis helps to reduce uncertainty in the products delivered by the individual techniques, resulting in quantitative flood front positions that can be used in assisted history matching of reservoir flow simulations. The case study establishes the value of utilizing 4D seismic in an integrated workflow with PTA techniques for generating flood front constraints that aim to improve forecasting models and guide reservoir management decisions.
{"title":"Integration of 4D Seismic and Pressure Transient Analysis for Flood Front Estimation","authors":"S. Oppert, Fnu Suleen","doi":"10.3997/2214-4609.201901474","DOIUrl":"https://doi.org/10.3997/2214-4609.201901474","url":null,"abstract":"Summary Time-Lapse (4D) seismic data is used in conjunction with Pressure Transient Analysis (PTA) to quantify the extent and shape of waterflood fronts in a deep-water Gulf of Mexico case study. The waterflood front positions are interpreted on 4D seismic amplitude difference maps and the flood front is modelled in analytical PTA. The asymmetric flood front is investigated in a numerical PTA model and parameter sensitivities for matching both the 4D seismic interpretation and the pressure falloffs tests are explored. The workflow allows for iterations in the interpretation of the 4D flood front as well as updates to the parameters used in the numerical PTA until a satisfactory model is created which matches both the 4D seismic data and the pressure falloffs used in PTA. Together, the joint iterative analysis helps to reduce uncertainty in the products delivered by the individual techniques, resulting in quantitative flood front positions that can be used in assisted history matching of reservoir flow simulations. The case study establishes the value of utilizing 4D seismic in an integrated workflow with PTA techniques for generating flood front constraints that aim to improve forecasting models and guide reservoir management decisions.","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82810258","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 : 2019-06-03DOI: 10.3997/2214-4609.201901627
J. Daves, Y. Ning, Ahmed Alfataierge, Sheila Harryandi, J. Utley, J. Simmons, A. Tura
Summary Increased hydrocarbon recovery is essential for continued economic development of unconventional reservoirs. Our project focuses on dynamic characterization of the Niobrara and Codell formations in the Wattenberg field through the development and analysis of a full integrated reservoir model. The ultimate goal is to optimize the exploration and exploitation of the reservoir and this paper discusses our progress. Our work on hydraulic fracture simulations that include input from both 1D and 3D geomechanical models presents insight into how to properly incorporate reservoir heterogeneity. The hydraulic fracture simulation results are history matched and then input into a flow simulator and ran for 2 years of production. The results are then integrated with both microseismic and time-lapse multicomponent seismic. In addition, a seismic based facies inversion gives insight into future well planning.
{"title":"Integrated Reservoir Characterization of the Wattenberg Unconventional Field, Colorado, USA","authors":"J. Daves, Y. Ning, Ahmed Alfataierge, Sheila Harryandi, J. Utley, J. Simmons, A. Tura","doi":"10.3997/2214-4609.201901627","DOIUrl":"https://doi.org/10.3997/2214-4609.201901627","url":null,"abstract":"Summary Increased hydrocarbon recovery is essential for continued economic development of unconventional reservoirs. Our project focuses on dynamic characterization of the Niobrara and Codell formations in the Wattenberg field through the development and analysis of a full integrated reservoir model. The ultimate goal is to optimize the exploration and exploitation of the reservoir and this paper discusses our progress. Our work on hydraulic fracture simulations that include input from both 1D and 3D geomechanical models presents insight into how to properly incorporate reservoir heterogeneity. The hydraulic fracture simulation results are history matched and then input into a flow simulator and ran for 2 years of production. The results are then integrated with both microseismic and time-lapse multicomponent seismic. In addition, a seismic based facies inversion gives insight into future well planning.","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82961386","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 : 2019-06-03DOI: 10.3997/2214-4609.201901674
P. Biver, M. Beele, M. Bez, L. Carcione, N. Haller
Summary This paper is presenting an application of object-based modeling technique for a specific fluvio-lacustrine environment. The geological context is firstly depicted. Subsequently, the available information is described and the motivation for using object-based modeling is explained. The challenging part of the study was to build a relevant trend for object proportions; this key point is detailed. The algorithm used is then briefly recalled and some results of the facies model are presented. The last part of the paper is briefly addressing the uncertainties on the geological model to obtain hydrocarbon in place distribution. Some key messages are given as conclusion.
{"title":"Object Modelling and Related Uncertainties in a Fluvio-Lacustrine Environment with Geological and Seismic Drivers","authors":"P. Biver, M. Beele, M. Bez, L. Carcione, N. Haller","doi":"10.3997/2214-4609.201901674","DOIUrl":"https://doi.org/10.3997/2214-4609.201901674","url":null,"abstract":"Summary This paper is presenting an application of object-based modeling technique for a specific fluvio-lacustrine environment. The geological context is firstly depicted. Subsequently, the available information is described and the motivation for using object-based modeling is explained. The challenging part of the study was to build a relevant trend for object proportions; this key point is detailed. The algorithm used is then briefly recalled and some results of the facies model are presented. The last part of the paper is briefly addressing the uncertainties on the geological model to obtain hydrocarbon in place distribution. Some key messages are given as conclusion.","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86688045","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 : 2019-06-03DOI: 10.3997/2214-4609.201901625
J. Li, S. R. Hussaini, H. Al-Mukainah, J. Dvorkin
Summary The total porosity and absolute permeability of a large digital sample, a segmented 3D micro-CT-scan image of coarse aeolian sand, is computed using the Lattice-Boltzmann (LB) single-phase fluid flow simulation. An alternative and faster approach is to divide the large sample into subvolumes (elements), and use the LB method on each element. The permeability of the host sample is then obtained by Darcy's simulation on a synthetic volume comprised of the elemental permeabilities. The results of the first and the second method are practically identical in this example. Using subvolumes also helps produce a physically meaningful permeability-porosity trend from a single digital object. These results are likely to be valid only in samples with well-connected and homogeneous pore space. A counterexample comes from carbonate where appreciable part of the pore volume is located in vugs. Here the permeability-porosity trend formed by the majority of the subsamples exceeds the permeability of the host sample by about half of an order of magnitude due to the enhanced connectivity when dividing the host across the isolated vugs.
{"title":"Digital Subvolumes: Computational Approaches and Permeability-Porosity Transforms","authors":"J. Li, S. R. Hussaini, H. Al-Mukainah, J. Dvorkin","doi":"10.3997/2214-4609.201901625","DOIUrl":"https://doi.org/10.3997/2214-4609.201901625","url":null,"abstract":"Summary The total porosity and absolute permeability of a large digital sample, a segmented 3D micro-CT-scan image of coarse aeolian sand, is computed using the Lattice-Boltzmann (LB) single-phase fluid flow simulation. An alternative and faster approach is to divide the large sample into subvolumes (elements), and use the LB method on each element. The permeability of the host sample is then obtained by Darcy's simulation on a synthetic volume comprised of the elemental permeabilities. The results of the first and the second method are practically identical in this example. Using subvolumes also helps produce a physically meaningful permeability-porosity trend from a single digital object. These results are likely to be valid only in samples with well-connected and homogeneous pore space. A counterexample comes from carbonate where appreciable part of the pore volume is located in vugs. Here the permeability-porosity trend formed by the majority of the subsamples exceeds the permeability of the host sample by about half of an order of magnitude due to the enhanced connectivity when dividing the host across the isolated vugs.","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89018538","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 : 2019-06-03DOI: 10.3997/2214-4609.201900957
H. Collini, M. Jackson
{"title":"Improved Understanding of Zeta Potentials in Intact Natural Rock Cores and Implications for Controlled Salinity Waterflooding","authors":"H. Collini, M. Jackson","doi":"10.3997/2214-4609.201900957","DOIUrl":"https://doi.org/10.3997/2214-4609.201900957","url":null,"abstract":"","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"8 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91441986","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 : 2019-06-03DOI: 10.3997/2214-4609.201901159
P. Veeken, M. Dillen, K. Tietze, C. Patzer, O. Ritter
{"title":"Resistivity and Reservoir Monitoring in the Lower Cretaceous Bockstedt Oilfield Using a Borehole CSEM Setup","authors":"P. Veeken, M. Dillen, K. Tietze, C. Patzer, O. Ritter","doi":"10.3997/2214-4609.201901159","DOIUrl":"https://doi.org/10.3997/2214-4609.201901159","url":null,"abstract":"","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"15 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91503248","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 : 2019-06-03DOI: 10.3997/2214-4609.201900855
S. Emmanuel, J. Girnun
{"title":"Porosity Reduction During Contact Metamorphism in Sandstone Reservoirs","authors":"S. Emmanuel, J. Girnun","doi":"10.3997/2214-4609.201900855","DOIUrl":"https://doi.org/10.3997/2214-4609.201900855","url":null,"abstract":"","PeriodicalId":6840,"journal":{"name":"81st EAGE Conference and Exhibition 2019","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91542638","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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