Crosswell seismic applications for improved reservoir understanding

Abstract

Crosswell seismic (CS) technology provides a high-resolution image of the subsurface between two nearby wells. Crosswell seismic data can reach frequencies greater than 1000 Hz, which makes the technology applicable to many reservoir-development challenges in hydrocarbon exploration and production studies that require high resolution. Applications of crosswell seismic data range from structural and stratigraphic interpretation to reservoir monitoring and enhanced oil recovery (EOR). When integrated with rock physics, crosswell seismic data can be used in reservoir-characterization studies, which potentially could be used for enhancing the resolution of rock properties derived from 3D surface-seismic data to that of crosswell resolution. In addition, velocity models obtained from crosswell seismic data can be used to better predict event locations in microseismic data processing.

Controlling factors of acoustic properties in continental carbonates: Implications for high-resolution seismic imaging

“…Such method aims to image inter-well areas using high frequency acquisitions (between 100 and 2000 Hz), resulting in the imaging of reflectors representing meter-scale geological contrasts which bridge the gap between sonic log measurements and conventional seismic (e.g. Harris et al, 1995;Leiceaga et al, 2015;Yu et al, 2008). For instance, Parra et al (2003) used a combination of nuclear magnetic resonance, sonic and density well logs with inverted impedance section based on crosswell seismic for characterizing the geometry of heterogeneous vuggy carbonates.…”

Analysis and Optimization of Bending Vibration Modes of a Trilaminar Bending Ring Transducer with Unequal Diameters

“…It involves placing a seismic source in one well to generate seismic waves, while a geophone is placed in another well to capture the waves as they pass through the subsurface strata and reach the second well. By analyzing the recorded seismic data and performing inversion techniques, a detailed crosswell geological profile can be obtained [1]. Compared to traditional surface seismic surveys, crosswell seismic surveys offer significantly higher resolution, typically ranging from 10 to 100 times greater.…”

2D High-Resolution Crosswell Seismic Traveltime Tomography

“…Crosswell tomography already seems very effective in application to problems in exploration geology and environmental monitoring. Typical applications include those to characterize rock mass and provide assessment of geological features in the exploitation of mineral resources (Greenhalgh et al, 2003;Malehmir et al, 2012), to investigate aquifer and oil/gas reservoirs (Justice et al, 1989;Emery and Parra, 2013), site characterization for engineering projects (Angioni et al, 2003), monitoring CO2 injection (Harris et al, 1995;Zhang et al, 2012), characterization studies of reservoirs to provide a more accurate initial velocity model to predict precise event locations in microseismic events (Leiceaga et al, 2015), evaluation of bridge foundations (Butchibabu et al, 2017), estimating elastic properties and anisotropic effects in site media (von Ketelhodt et al, 2018).…”