Reducing uncertainty by integrating 3D CSEM in the Mexican deep-water exploration workflow

Alcocer, José Antonio Escalera; García, Marco Vázquez; Soto, Humberto Salazar; Baltar, D.; Paramo, V. Ricoy; Gabrielsen, Pål T.; Roth, F.

doi:10.3997/1365-2397.31.4.67468

Cited by 3 publications

(1 citation statement)

References 4 publications

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“…The marine controlled-source electromagnetic (CSEM) method has been applied in different applications, such as hydrocarbon and hydrates exploration [ 1 , 2 ], drilling hazards mitigation [ 3 , 4 ], sub-basalt or sub-salt imaging [ 5 , 6 ], freshwater investigations [ 7 , 8 ], and lithosphere and crust studies [ 9 , 10 , 11 ]. CSEM is widely acknowledged as an efficient method in exploration due to its high sensitivity in distinguishing resistive and conductive anomalies, such as oil and brine reservoirs [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Time-Lapse 3D CSEM for Reservoir Monitoring Based on Rock Physics Simulation of the Wisting Oil Field Offshore Norway

Ettayebi

Wang

Landrø

2023

Sensors

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The marine controlled-source electromagnetic (CSEM) method has been used in different applications, such as oil and gas reservoir exploration, groundwater investigation, seawater intrusion studies and deep-sea mineral exploration. Recently, the utilization of the marine CSEM method has shifted from petroleum exploration to active monitoring due to increased environmental concerns related to hydrocarbon production. In this study, we utilize the various dynamic reservoir properties available through reservoir simulation of the Wisting field in the Norwegian part of the Barents Sea. In detail, we first developed geologically consistent rock physics models corresponding to reservoirs at different production phases, and then transformed them into resistivity models. The constructed resistivity models pertaining to different production phases can be used as input models for a finite difference time domain (FDTD) forward modeling workflow to simulate EM responses. This synthetic CSEM data can be studied and analyzed in the light of production-induced changes in the reservoir at different production phases. Our results demonstrate the ability of CSEM data to detect and capture production-induced changes in the fluid content of a producing hydrocarbon reservoir. The anomalous CSEM responses correlating to the reservoir resistivity change increase with the advance of the production phase, and a similar result is shown in anomalous transverse resistance (ATR) maps derived from the constructed resistivity models. Moreover, the responses at 30 Hz with a 3000 m offset resulted in the most pronounced anomalies at the Wisting reservoir. Hence, the method can effectively be used for production-monitoring purposes.

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Section: Introductionmentioning

confidence: 99%

Time-Lapse 3D CSEM for Reservoir Monitoring Based on Rock Physics Simulation of the Wisting Oil Field Offshore Norway

Ettayebi

Wang

Landrø

2023

Sensors

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Deep structural controls on the distribution of carbonate reservoirs and overburden heterogeneity in Central Luconia province, offshore Borneo revealed by 3D anisotropic inversion of regional controlled-source electromagnetic and magnetotelluric profile data

Kho,

Meju,

Miller

et al. 2023

GEOPHYSICS

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Understanding the deep structural controls on reservoir distribution and overburden heterogeneity is important for near-field exploration and green-field development of the Miocene to Holocene carbonate buildups in Central Luconia province in offshore Borneo, Malaysia. Data from 59 stations along a ~180 km-long controlled-source electromagnetic (CSEM) and magnetotelluric (MT) survey line with three segments recorded using different CSEM transmitter-towing directions were available. We applied three-dimensional (3D) anisotropic resistivity inversion with crossgradient constraint and verified the resulting models using resistivity logs from nearby wells and the acoustic basement interpreted from seismic data. Our anisotropic resistivity models reveal a fragmented carbonate-rich zone atop a segmented basement comprising electrically resistive horsts coinciding with the northerly Mega-platform, Central and Southern Field Highs separated by steep conductive zones coinciding with the West, East and Southeast Troughs previously interpreted from seismic data. The structural highs correlate with the spatial distribution of the known carbonate buildups implying a genetic link. The carbonate bodies are overlain and underlain by persistent layers (C2 and C3) of low resistivity and high anisotropy which we interpret as indicating compressional deformation or detachment zones. Overburden layer C2 (whose base coincides with the top of a key sedimentary package, Cycle V in seismic data) is thinnest over the East Trough and is discontinuous at the eastern margin of the West Trough, which are locations where drilled wells did not find hydrocarbons implying that the seal rocks are inefficient or breached at those localities. We used these observations to refine the existing seismic-based interpretation of carbonate play-types along our transect showing how 3D joint CSEM-MT imaging can potentially contribute to derisking or optimizing future exploration and/or development work in this province.

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Integration of seismic, CSEM, and well data in the Perdido basin, Gulf of Mexico

Nivlet

Pérez

Alcocer

et al. 2014

SEG Technical Program Expanded Abstracts 2014

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We present the results of a joint interpretation of both 3D seismic and 3D CSEM data from a prospect in the Perdido fold belt (deep offshore Gulf of Mexico). The study began after the first exploration well was drilled over the structure, confirming the presence of oil in two Early Eocene intervals. The integrated methodology tailored for the study has resulted in (1) a better understanding of the sensitivity of the CSEM data, (2) discrimination between lithology and fluid effects and finally (3) an update of the oil volume estimated over the structure.

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Reducing uncertainty by integrating 3D CSEM in the Mexican deep-water exploration workflow

Cited by 3 publications

References 4 publications

Time-Lapse 3D CSEM for Reservoir Monitoring Based on Rock Physics Simulation of the Wisting Oil Field Offshore Norway

Time-Lapse 3D CSEM for Reservoir Monitoring Based on Rock Physics Simulation of the Wisting Oil Field Offshore Norway

Deep structural controls on the distribution of carbonate reservoirs and overburden heterogeneity in Central Luconia province, offshore Borneo revealed by 3D anisotropic inversion of regional controlled-source electromagnetic and magnetotelluric profile data

Integration of seismic, CSEM, and well data in the Perdido basin, Gulf of Mexico

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