Seismicimagingoffaultzones Force（地震imaging相近的过错zones的力量）.pdfVIP

Seismicimagingoffaultzones 1.#Relevance#relative#to#the#call#for#proposals# This project addresses the “Exploration and Reservoir Characterization” topic of the call. It does so by proposing a modelling approach to better understand fault zone evolution and seismic response. Improved understanding of these two processes can lead to the development of principles for the seismic characterization of fault zones. This can contribute to a better representation and forecasting of reservoirs in the many areas in which fault zones have impact such as drilling, sealing and leaking in hydrocarbon and CO2 systems, and hydrological and geothermal flow. 2.#Aspects#relating#to#the#research#project## 2.1.Backgroundandstatusofknowledge Faults play a major role in restricting or enhancing fluid flow in reservoirs (Knipe et al., 1998; Sorkhabi and Tsuji, 2005). Although usually interpreted as simple surfaces offsetting the stratigraphy, faults are not discrete planes, but rather zones/envelopes of more or less deformed rock with a complex 3D geometry and internal structure, at a wide range of scales of observation (Figure 1). The internal structure and resulting distribution of petrophysical properties inside the fault envelopes act as primary controls on fluid flow in faulted reservoirs and determine fault-sealing capacity over geological and production time scales. This has major implications in areas such as hydrocarbon exploration and production (e.g. Wibberley et al., 2008), CO2 sequestration (e.g. Nelson et al., 2009; Dockrill and Shipton, 2010), hydrologic and geothermal systems (e.g. do Nascimento et al., 2004; Majer et al., 2007), and drilling (e.g. Stewart and Holt, 2004). Figure 1. Fault zones at different scales of observation. a. Metre and b. Decametre size fault zones in Western Sinai. c. Hectometre size fault zone in the Visund field, northern North Sea (Færseth et al. 2007). Fault zones in a and b a