- document
-
Li, K. (author)Naturally fractured reservoirs (NFRs) gain much attention worldwide because they are often encountered in aquifer remediation, CO2 sequestration, and hydrocarbon extraction. In hydrocarbon extraction, however, oil recovery by gas injection in NFRs is usually low, because of poor sweep efficiency. During gas injection, the displacement front is...doctoral thesis 2022
- document
-
Li, K. (author), Sharifnik, Mohammadamin (author), Wolf, K.H.A.A. (author), Rossen, W.R. (author)Foam coarsening by diffusion (Ostwald ripening) has been well studied in bulk foams. However, it is less well understood in porous media. In particular, the mechanisms that may slow or stop coarsening have not been fully investigated. In this paper, we report an experimental study of foam coarsening in two 1-m-long and 15-cm-wide model fractures...journal article 2021
- document
-
Minato, S. (author), Wapenaar, C.P.A. (author), Ghose, R. (author)To quantitatively image fractures with high resolution, we have developed an elastic least-squares migration (LSM) algorithm coupled with linear-slip theory, which accurately addresses seismic wave interaction with thin structures. We derive a linearized waveform inversion using the Born approximation to the boundary integral equation for...journal article 2020
- document
-
Aguilar Lopez, J.P. (author), Bogaard, T.A. (author), Gerke, Horst H. (author)Dual-permeability models assume that the complete porous media system can be represented by two different interacting subsystems: the matrix and the fracture pore domain. For some soils like fractured clays, the fracture domain may be empty, which makes its physical behavior differ significantly from capillary flow. Our main hypothesis is...journal article 2020
- document
-
Minato, S. (author), Ghose, R. (author), Wapenaar, C.P.A. (author)Single-well reflection imaging using sonic logging data successfully locates fine-scale structures around a borehole including fractures. In order to achieve accurate and quantitative estimation of fracture properties with high resolution, we propose to couple least-squares migration with linear slip theory. The proposed least-squares...conference paper 2019
- document
-
Paulides, C.A.M. (author)The Zechstein carbonates are an established petroleum play in North-West Europe including the Netherlands. Several undrilled Zechstein buildups have been identified around the Elbow Spit High in the northern part of the North Sea with GIIPs ranging from 1 to 109 m3. Since only few wells penetrate the Zechstein carbonates in this area, little...master thesis 2016
- document
-
Kadu, Ajinkya (author), van Leeuwen, Tristan (author), Mulder, W.A. (author)<br/>In seismic exploration, the delineation of large bodies with hard exterior contrasts but nearly constant interior properties is a challenge. Examples include salt diapirs, salt slabs, anhydrite or basalt layers. Salt geometries are of particular interest because they often have hydrocarbon reservoirs on their sides or underneath. This...conference paper 2016
- document
-
Minato, S. (author), Ghose, R. (author)We explore the potential of multi-angle AVO inversion of P-P and P-S reflections from a fracture to estimate fracture proper- ties. Although AVO analysis of welded interface like geologi- cal layer boundaries is common, the use of AVO variations for nonwelded boundaries like fractures is yet to be investigated. We conduct laboratory experiments...conference paper 2016
- document
-
Minato, S. (author), Ghose, R. (author)The spatial heterogeneity along a fracture is a key determinant for fracture-associated hydraulic properties. We propose a new method to estimate the heterogeneous compliance distribution of a fracture from the reflection response at the fracture surface. For this purpose, we formulate a data-driven approach for Green's function retrieval based...conference paper 2015
- document
-
Ponziani, M. (author), Slob, E.C. (author), Luthi, S.M. (author), Bloemenkamp, R. (author), Le Nir, I. (author)We studied the electric response of fractures with laboratory experiments and numerical simulations for a full-bore formation microimaging tool. The laboratory setup was designed and built to perform controlled experiments with accurate measurements of all principal properties involved for electric borehole imaging. These properties are...journal article 2015
- document
-
Minato, S. (author), Ghose, R. (author)Fluid flow through a fractured reservoir is often controlled by the large fractures. Seismically imaging these large fractures has the potential to illuminate their hydraulic properties.We derived a nonlinear imaging condition considering a medium containing nonwelded interfaces such as fractures for high-resolution fracture imaging. This was...journal article 2015
- document
-
Minato, S. (author), Ghose, R. (author)Hydraulic properties of a fractured reservoir are often controlled by large fractures. In order to seismically detect and characterize them, a high-resolution imaging method is necessary. We apply a non-linear imaging condition to image fractures, considered as non-welded interfaces. We derive the imaging condition from the general correlation...conference paper 2014
- document
-
Fan, H. (author)Natural or hydraulic fractures are of major importance for the productivity of hydrocarbon reservoirs. Besides fracture detection, also the aperture and extension of the fractures are essential for a correct reservoir productivity estimate. There are many ways to detect and measure fractures, such as borehole televiewers and electrical borehole...doctoral thesis 2014
- document
-
Minato, S. (author), Ghose, R. (author)Using the scattered elastic wavefield, a method to derive the power spectral density (PSD) of the heterogeneous compliance distribution, along the plane of a single fracture, is formulated. The method involves estimation of the stress field at the fracture depth from the scattered wavefield followed by least-squares optimization of the PSD of...journal article 2014
- document
-
Parker, A.C. (author)Rock heterogeneities exist in mostly all rock types present in the Earth’s crust. Fractures are one such heterogeneity, which can range in size from very small micro-scale diffuse fractures to huge kilometer-wide regional features and meso-scale fracture corridors. The characterisation of fracture properties has many important implications for a...master thesis 2013
- document
-
Bisdom, K. (author)The main challenge of naturally fractured reservoirs (NFRs) is understanding how fractures behave in the subsurface outside the radius of influence of wells. Fractured outcrop analogues provide geological concepts that can be used to extrapolate fracture data outside the well control. Numerous methods for studying fractured outcrops are...master thesis 2011
- document
-
Bohlander, L.A. (author)Nowadays, when someone is diagnosed with a traumatic unstable spinal fracture, the spine is fixated by surgery and the patient is prescribed to wear a corset brace for 8 to 12 weeks. The two most used corset braces are the lumbar and the thoracic corset brace. These corset braces are highly uncomfortable and prevents the patient from almost...master thesis 2011
- document
-
Kooijman, D.A. (author)The primary gas reservoirs in the Southern Dutch offshore are in decline. Discoveries of new gas reservoirs are getting smaller and smaller reservoirs receive more attention. The three major carbonate beds in the Basal Zechstein (Z1C, Z2C and Z3C) are considered potential secondary gas reservoirs. To be able to develop the gas from these...master thesis 2011
- document
-
Vervuurt, A. (author)Anchor bolts are often used in concrete or steel structures. Nevertheless still empirical design procedures are used in order to determine the dimensions of the structure. Non linear fracture mechanics tries to describe fracture of heterogeneous materials like concrete. In the classical representation of concrete fracturing (figure 1.1),...master thesis 1992
- document
-
Hack, H.R.G.K. (author)This thesis describes an investigation of the possibilities to measure ground-mass and especially joint parameters (joint direction and joint density) for engineering purposes by means of seismic waves. Therefore a literature study and a field investigation in the United Kingdom were done. The results show that seismic wave behaviour in one...master thesis 1984