Seismic facies analyses as aid in regional gas hydrate assessments. Part-II: Prediction of reservoir properties, gas hydrate petroleum system analysis, and Monte Carlo simulation

Core and sediment physical property correlation of the second Ulleung Basin Gas Hydrate Drilling Expedition (UBGH2) results in the East Sea (Japan Sea)

“…Lee et al (2013) estimates the gas hydrate resource in a small data volume of the Ulleung Basin using a combination of seismic inversion and multi-attribute transform techniques with LWD data of UBGH2-2_2 and UBGH2-10 used in this study as well as UBGH2-9, and report up to 10% of saturation in the pore space of the turbidite sands over BGHSZ. Riedel et al (2013) assesses the potential gas hydrate resources in the Ulleung Basin using the classification of the seismic facies, and Monte Carlo simulations by the seismic and LWD data of four UBGH1 drilling sites and site UBGH2-10 showing that the more sand-rich units within the hemipelagic mud sections and the massetransport complexes have by far the highest overall gas hydrate volumes. The facies of hemi-pelagic mud with low contents of sandy turbidite layers and with high occurrence of turbidite layers contain gas hydrate saturations of up to 50%.…”

The Effects of Coupling Stiffness and Slippage of Interface Between the Wellbore and Unconsolidated Sediment on the Stability Analysis of the Wellbore Under Gas Hydrate Production

“…The shear and normal coupling stiffness have a linear trend with the confining stress. The models of the shear and normal coupling stiffness considering confining stress are as shown in Equations (12) and 13: Figure 3a shows measured data of shear stress and displacement while shearing wellbore surface and sediments. The shear coupling stiffness can be derived from the measured data from the slope of the relationship between shear stress and displacement.…”

“…The shear and normal coupling stiffness have a linear trend with the confining stress. The models of the shear and normal coupling stiffness considering confining stress are as shown in Equations (12) and 13:…”

“…The national projects, Ulleung Basin gas hydrate expeditions 1 and 2 (UBGH1 in 2007 and UBGH2 in 2010), were conducted to investigate the hydrate reserves and characteristics of gas hydrate-bearing sediments of the Ulleung Basin in the East sea of Korea [7][8][9]. Based on the data of UBGH2, the estimated amount of natural gas-hydrate deposits in Ulleung Basin ranged from 4.4 × 10 6 to 9.2 × 10 9 m 3 [10][11][12]. Recently, Bo et al [13] suggested deterministic estimation from rock physics modeling and pre-stack inversion, and estimated the total gas-hydrate and gas resource volume in Ulleung Basin as about 8.43 × 10 8 m 3 and 1.38 × 10 11 m 3 , respectively.…”

Seismic inversion and attributes analysis for porosity evaluation of the tight gas sandstones of the Whicher Range field in the Perth Basin, Western Australia

“…So, in an effort to set a correlation and calibration between seismic and well log data, seismic inversion, as an effective technique, has been proposed and used by many geoscientists and geophysicists. By application of multivariate statistics and neural network models, acoustic impedance from inversion associated with other related seismic attributes, have been used for prediction of reservoir properties (e.g., Hampson et al, 2001;Huuse and Feary, 2005;Jian and Fanhua, 2009;Khoshdel and Riahi, 2007;Ogiesoba, 2010;Leite and Vidal, 2011;Chatterjee et al, 2013;Riedel et al, 2013).…”