... inverse compaction timeshift rebound international energy 10 magnitude reservoir compaction upstream oil & gas reservoir characterization exploration geophysicist geologist applied geoscience overburden reservoir geomechanics compartment american association society reservoir rebound...

... american association sichuan basin overburden compressibility synthetic web-avo inversion upstream oil & gas well 1 applied geoscience society gisolf Finding the reservoir in an intensely scattered wavefield. A case study from the Central Sichuan Basin, China. John Coffin*, Mengmeng Zhang...

... or microseismic events, out of zone injection, or even fracturing into the overburden. Subsurface data enables model calibration and inclusion of complexity that can accurately explain and constrain these multifaceted systems, helping to design reliable storage systems for CO 2 injection. A range of surveillance...

... overburden chevron technical center We analyzed the sensitivity of Interferometric Synthetic Aperture Radar (InSAR) measurement to subsurface strain change and show that the resolution of InSAR images is approximately equal to the depth of the targeted activities. We also showed that changes taking...

... correlation connectivity american association signature reservoir characterization exploration geophysicist applied geoscience macbeth upstream oil & gas sequence interpretation perforation energy 10 relevancy structural geology overburden international lofs20 interference...

... inversion exploration geophysicist applied geoscience upstream oil & gas information reflection coefficient macbeth reservoir characterization international interface intercept overburden curvature joint inversion amplitude american association evaluation colin macbeth...

... for estimating and correcting water velocity changes on 4D seismic datasets. Each sail line is migrated independently and Common Depth Point (CDP) gathers are output for the overburden along a subsurface strip for both vintages. The 4D approach consists of performing cross-correlations using collocated CDPs...

... node (OBN) data, challenges are emerging to obtain good initial elastic models of the shallow overburden. Full-waveform inversion (FWI) can readily provide initial compressional wave (P-wave) velocities, and mirror migration plus tomographic inversion accurately and robustly updates these velocities...

... Time-lapse (4D) seismic is an essential tool for monitoring the subsurface in and around producing hydrocarbon or CO 2 storage reservoirs. The seismic time-shifts, in the reservoir as well as in the overburden, depend on the stress changes and strains induced by the subsurface depletion...

... data. particularly when the anisotropic intervals are thin, spatially localized, and when the anisotropy is weak, and/or the A previous study (Van De Coevering et al., 2019) has con- overburden complicated. Previous study showed that VVAZ cluded that azimuthal anisotropy analysis, using P-wave sur...

... differences, data quality challenges, and to the null-space of the inverse problem. Regularisation of the inverse problem is therefore required but challenging as changes in the overburden and reservoir have different (spatial) characteristics. Total Variation (TV) regularization of the time-lapse model...

... that often needs to be discretized consistently using a fine grid, to delineate for example reservoir scale features. Building on the recent development of target-oriented imaging and inversion, we split the subsurface space into the overburden, above a datumlevel, and the target zone beneath the datum. Our...

... conductor and any thin, conductive overburden than might exist above the half-space. The overburden is often comprised of glacial tills and clays or the conductive weathering of basement rocks. This situation can be approximated using a discrete conductor model consisting of a "dipping sphere...

... onshore colombia surface characterization onshore colombia scalar reservoir characterization information seg international exposition insc interpretation near-surface characterization survey area artificial intelligence overburden None Integrated Near-surface Characterization...

... data klaa koster anisotropy vvaz shale body seam corporation upstream oil & gas azimuth annual meeting overburden avaz norbert van variation correlation seismic data seg international exposition reservoir zone reservoir characterization reflection coefficient Grechka , V...

... characterization and monitoring tool for large-demonstration and commercial-scale offshore Carbon Capture and Storage (CCS) sites. Presentation Date: Tuesday, September 17, 2019 Session Start Time: 1:50 PM Presentation Start Time: 1:50 PM Location: 301B Presentation Type: Oral overburden stratigraphy...

... ABSTRACT Dynamic changes in the overburden such as geomechanical variation and hydrocarbon migration which occur between the acquisition of 4D surveys influence reservoir monitoring programs and are typically not compensated for with current industry time-lapse workflows. We utilize prestack...

... ABSTRACT A review and analysis of post-stack time-lapse time-shifts has been carried out that covers published literature supplemented by in-house datasets available to the authors. From these data conclusions are drawn regarding the effectiveness of post-stack time-shifts for overburden...

... in the spring of 2017. The recorded data show excellent spatial correlation with resistivity variations predicted by reservoir simulation. A finite difference model of the overburden and wellbore casing is used to invert for resistivity estimates of the reservoir surrounding the well. The inversion results...

... for the estimation of anisotropy around the borehole without the need to model the overburden. The constructed slowness curve is then inverted for components of the stiffness tensor. Preliminary results show that the inverted vertical velocities match well with nearby well data. However, the horizontal estimates...