Geological controls on the occurrence of gas hydrate from core, downhole log, and seismic data in the Shenhu area, South China Sea

Wang, Xiujuan; Collett, Timothy S.; Lee, Myung W.; Yang, Shengxiong; Guo, Yiqun; Wu, Shiguo

doi:10.1016/j.margeo.2014.09.040

Cited by 153 publications

(81 citation statements)

References 60 publications

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“…The carbon isotopic results at Ocean drilling program (ODP) sites 1144 and 1146 indicated that source of hydrate could be from mixture of thermogenic and biogenic gas (Wang et al, 2000). Additionally, mixture of deep thermogenic gas and shallow biogenic gas are indicated in the Shenhu region of northern South China Sea (Yu et al, 2014;Wu et al, 2011;Liu et al, 2012;Wang et al, 2014). Given these facts, the double BSRs could also be explained by the local existence of thermogenic gas at depth.…”

Section: Possible Double Bsrs and Their Causesmentioning

confidence: 98%

BSRs, estimated heat flow, hydrate-related gas volume and their implications for methane seepage and gas hydrate in the Dongsha region, northern South China Sea

Liu

Zhang

et al. 2015

Marine and Petroleum Geology

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Section: Possible Double Bsrs and Their Causesmentioning

confidence: 98%

BSRs, estimated heat flow, hydrate-related gas volume and their implications for methane seepage and gas hydrate in the Dongsha region, northern South China Sea

Liu

Zhang

et al. 2015

Marine and Petroleum Geology

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“…South China Sea (passive continental margin) i. Sites SH-2, 23, and 27 [e.g., Matsumoto et al, 2011, and references therein;Wang et al, 2011aWang et al, , 2011bWang et al, , 2014aWang et al, , 2014bWu et al, 2011]. 10.…”

Section: Introductionmentioning

confidence: 99%

Observed correlation between the depth to base and top of gas hydrate occurrence from review of global drilling data

Riedel

Collett

2017

Geochem Geophys Geosyst

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A global inventory of data from gas hydrate drilling expeditions is used to develop relationships between the base of structure I gas hydrate stability, top of gas hydrate occurrence, sulfate‐methane transition depth, pressure (water depth), and geothermal gradients. The motivation of this study is to provide first‐order estimates of the top of gas hydrate occurrence and associated thickness of the gas hydrate occurrence zone for climate‐change scenarios, global carbon budget analyses, or gas hydrate resource assessments. Results from publically available drilling campaigns (21 expeditions and 52 drill sites) off Cascadia, Blake Ridge, India, Korea, South China Sea, Japan, Chile, Peru, Costa Rica, Gulf of Mexico, and Borneo reveal a first‐order linear relationship between the depth to the top and base of gas hydrate occurrence. The reason for these nearly linear relationships is believed to be the strong pressure and temperature dependence of methane solubility in the absence of large difference in thermal gradients between the various sites assessed. In addition, a statistically robust relationship was defined between the thickness of the gas hydrate occurrence zone and the base of gas hydrate stability (in meters below seafloor). The relationship developed is able to predict the depth of the top of gas hydrate occurrence zone using observed depths of the base of gas hydrate stability within less than 50 m at most locations examined in this study. No clear correlation of the depth to the top and base of gas hydrate occurrences with geothermal gradient and sulfate‐methane transition depth was identified.

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“…For this study, we have interpreted lithofacies through cored and uncored sections of the available wells following Jadoon et al (2017), Zhong et al (2017), Wang et al (2014), Hammer et al (2010), Cohen et al (1996) and Seybold et al (1996). Twelve lithofacies were interpreted based on sedimentological characteristics and bioturbation markers (Table 1).…”

Section: Facies Interpretationmentioning

confidence: 99%

Integrated 3D facies modeling of the Mangahewa Formation, Maui Gas Field, Taranaki Basin, New Zealand

Haque

Islam

Shalaby

et al. 2018

J Petrol Explor Prod Technol

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Abstract3D seismic data, well logs, core-based lithofacies and photographs have been combined to interpret and model the depositional facies of the Mangahewa Formation of the Maui Gas Field, Taranaki Basin, New Zealand. The primary objective of the study is to generate a robust facies model for the Middle to Late Eocene (47-37 Ma) Mangahewa Formation of the field. The facies model has included eighteen depositional facies spatially distributed over the gas field. These facies are further subgrouped into three broad depositional facies associations, namely marginal marine, shallow marine and offshore environment. We have identified that marginal marine is the most dominant facies association (64%) within the model. The model visualizes estuarine and shoreface sand geobodies dominating over other facies within the model. Both geobodies comprise over 40% of all the facies interpreted in the field. The entire modeling process involves a novel stochastic approach using unique workflow that follows 3D gridding, coding of the facies classes and multiple iterations over the interpreted facies. The model therefore realistically visualizes potential facies responsible for "good"-quality reservoir sands in the Mangahewa Formation with possible retrogradation from older to younger succession.

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Geological controls on the occurrence of gas hydrate from core, downhole log, and seismic data in the Shenhu area, South China Sea

Cited by 153 publications

References 60 publications

BSRs, estimated heat flow, hydrate-related gas volume and their implications for methane seepage and gas hydrate in the Dongsha region, northern South China Sea

BSRs, estimated heat flow, hydrate-related gas volume and their implications for methane seepage and gas hydrate in the Dongsha region, northern South China Sea

Observed correlation between the depth to base and top of gas hydrate occurrence from review of global drilling data

Integrated 3D facies modeling of the Mangahewa Formation, Maui Gas Field, Taranaki Basin, New Zealand

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