SS Gas Hydrate: Prediction of Production Test Performances in Eastern Nankai Trough Methane Hydrate Reservoirs Using 3D Reservoir Model

2010 ◽  
Author(s):  
Masanori Kurihara ◽  
Akihiko Sato ◽  
Hisanao Ouchi ◽  
Hideo Narita ◽  
Takao Ebinuma ◽  
...  
Keyword(s):  
Gas Hydrate ◽  
Methane Hydrate ◽  
Nankai Trough ◽  
Production Test ◽  
Reservoir Model ◽  
Hydrate Reservoirs

scholarly journals Construction of 3 dimensional methane hydrate reservoir model in Eastern Nankai Trough and prediction of production test performance

2010 ◽  
Vol 75 (1) ◽  
pp. 72-83 ◽  
Author(s):  
Hisanao Ouchi ◽  
Masanori Kurihara ◽  
Akihiko Sato ◽  
Yoshihiro Masuda ◽  
Hideo Narita ◽  
...  
Keyword(s):  
Test Performance ◽  
Methane Hydrate ◽  
Nankai Trough ◽  
Production Test ◽  
Reservoir Model ◽  
3 Dimensional ◽  
Hydrate Reservoir

scholarly journals Multiphase Flow Behavior of Layered Methane Hydrate Reservoir Induced by Gas Production

Geofluids ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-15 ◽  
Author(s):  
Yilong Yuan ◽  
Tianfu Xu ◽  
Xin Xin ◽  
Yingli Xia
Keyword(s):  
Multiphase Flow ◽  
Gas Hydrate ◽  
Methane Hydrate ◽  
Nankai Trough ◽  
Flow Behavior ◽  
Gas Production ◽  
Production Performance ◽  
Heterogeneous Structure ◽  
Hydrate Saturation ◽  
Hydrate Reservoirs

Gas hydrates are expected to be a potential energy resource with extensive distribution in the permafrost and in deep ocean sediments. The marine gas hydrate drilling explorations at the Eastern Nankai Trough of Japan revealed the variable distribution of hydrate deposits. Gas hydrate reservoirs are composed of alternating beds of sand and clay, with various conditions of permeability, porosity, and hydrate saturation. This study looks into the multiphase flow behaviors of layered methane hydrate reservoirs induced by gas production. Firstly, a history matching model by incorporating the available geological data at the test site of the Eastern Nankai Trough, which considers the layered heterogeneous structure of hydrate saturation, permeability, and porosity simultaneously, was constructed to investigate the production characteristics from layered hydrate reservoirs. Based on the validated model, the effects of the placement of production interval on production performance were investigated. The modeling results indicate that the dissociation zone is strongly affected by the vertical reservoir’s heterogeneous structure and shows a unique dissociation front. The beneficial production interval scheme should consider the reservoir conditions with high permeability and high hydrate saturation. Consequently, the identification of the favorable hydrate deposits is significantly important to realize commercial production in the future.

Physical properties and sedimentological features of hydrate-bearing samples recovered from the first gas hydrate production test site on Daini-Atsumi Knoll around eastern Nankai Trough

2015 ◽  
Vol 66 ◽  
pp. 346-357 ◽  
Author(s):  
Kiyofumi Suzuki ◽  
Peter Schultheiss ◽  
Yoshihiro Nakatsuka ◽  
Takuma Ito ◽  
Kosuke Egawa ◽  
...  
Keyword(s):  
Physical Properties ◽  
Gas Hydrate ◽  
Nankai Trough ◽  
Test Site ◽  
Production Test

Numerical Study on Eastern Nankai Trough gas Hydrate Production Test

2014 ◽  
Author(s):  
Mingliang Zhou ◽  
Kenichi Soga ◽  
Ermao Xu ◽  
Shun Uchida ◽  
Koji Yamamoto
Keyword(s):  
Gas Hydrate ◽  
Nankai Trough ◽  
Numerical Study ◽  
Production Test

Comparison of Simplistic and Geologically Descriptive Production Modeling for Natural-Gas Hydrate by Depressurization

SPE Journal ◽  
2019 ◽  
Vol 24 (02) ◽  
pp. 563-578 ◽  
Author(s):  
Yilong Yuan ◽  
Tianfu Xu ◽  
Yingli Xia ◽  
Xin Xin
Keyword(s):  
Gas Hydrate ◽  
History Matching ◽  
Nankai Trough ◽  
Flow Behavior ◽  
Test Site ◽  
Gas Production ◽  
Production Test ◽  
Hydrate Reservoir ◽  
Hydrate Saturation ◽  
Production Modeling

Summary Marine-gas-hydrate-drilling exploration at the Eastern Nankai Trough of Japan revealed the variable distribution of hydrate accumulations, which are composed of alternating beds of sand, silt, and clay in sediments, with vertically varying porosity, permeability, and hydrate saturation. The main purposes of this work are to evaluate gas productivity and identify the multiphase-flow behavior from the sedimentary-complex hydrate reservoir by depressurization through a conventional vertical well. We first established a history-matching model by incorporating the available geological data at the offshore-production test site in the Eastern Nankai Trough. The reservoir model was validated by matching the fluid-flow rates at a production well and temperature changes at a monitoring well during a field test. The modeling results indicate that the hydrate-dissociation zone is strongly affected by the reservoir heterogeneity and shows a unique dissociation front. The gas-production rate is expected to increase with time and reach the considerable value of 3.6 × 104 std m3/d as a result of the significant expansion of the dissociation zone. The numerical model, using a simplified description of porosity, permeability, and hydrate saturation, leads to significant underestimation of gas productivity from the sedimentary-complex hydrate reservoir. The results also suggest that the interbedded-hydrate-occurrence systems might be a better candidate for methane (CH4) gas extraction than the massive hydrate reservoirs.

The response of temperature and pressure of hydrate reservoirs in the first gas hydrate production test in South China Sea

2020 ◽  
Vol 278 ◽  
pp. 115649 ◽  
Author(s):  
Xuwen Qin ◽  
Qianyong Liang ◽  
Jianliang Ye ◽  
Lin Yang ◽  
Haijun Qiu ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Gas Hydrate ◽  
Production Test ◽  
China Sea ◽  
Temperature And Pressure ◽  
Hydrate Reservoirs

Prediction of Gas Productivity From Eastern Nankai Trough Methane Hydrate Reservoirs

2008 ◽  
Author(s):  
Masanori Kurihara ◽  
Akihiko Sato ◽  
Hisanao Ouchi ◽  
Hideo Narita ◽  
Yoshihiro Masuda ◽  
...  
Keyword(s):  
Methane Hydrate ◽  
Nankai Trough ◽  
Hydrate Reservoirs

scholarly journals Enhanced CH4-CO2 Hydrate Swapping in the Presence of Low Dosage Methanol

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5238 ◽  
Author(s):  
Jyoti Shanker Pandey ◽  
Charilaos Karantonidis ◽  
Adam Paul Karcz ◽  
Nicolas von Solms
Keyword(s):  
Gas Hydrate ◽  
Methane Hydrate ◽  
Water Saturation ◽  
Co2 Storage ◽  
Residual Water ◽  
Methane Recovery ◽  
Initial Water ◽  
Hydrate Film ◽  
Hydrate Reservoirs ◽  
Low Dosage

CO2-rich gas injection into natural gas hydrate reservoirs is proposed as a carbon-neutral, novel technique to store CO2 while simultaneously producing CH4 gas from methane hydrate deposits without disturbing geological settings. This method is limited by the mass transport barrier created by hydrate film formation at the liquid–gas interface. The very low gas diffusivity through hydrate film formed at this interface causes low CO2 availability at the gas–hydrate interface, thus lowering the recovery and replacement efficiency during CH4-CO2 exchange. In a first-of-its-kind study, we have demonstrate the successful application of low dosage methanol to enhance gas storage and recovery and compare it with water and other surface-active kinetic promoters including SDS and L-methionine. Our study shows 40–80% CH4 recovery, 83–93% CO2 storage and 3–10% CH4-CO2 replacement efficiency in the presence of 5 wt% methanol, and further improvement in the swapping process due to a change in temperature from 1–4 °C is observed. We also discuss the influence of initial water saturation (30–66%), hydrate morphology (grain-coating and pore-filling) and hydrate surface area on the CH4-CO2 hydrate swapping. Very distinctive behavior in methane recovery caused by initial water saturation (above and below Swi = 0.35) and hydrate morphology is also discussed. Improved CO2 storage and methane recovery in the presence of methanol is attributed to its dual role as anti-agglomerate and thermodynamic driving force enhancer between CH4-CO2 hydrate phase boundaries when methanol is used at a low concentration (5 wt%). The findings of this study can be useful in exploring the usage of low dosage, bio-friendly, anti-agglomerate and hydrate inhibition compounds in improving CH4 recovery and storing CO2 in hydrate reservoirs without disturbing geological formation. To the best of the authors’ knowledge, this is the first experimental study to explore the novel application of an anti-agglomerate and hydrate inhibitor in low dosage to address the CO2 hydrate mass transfer barrier created at the gas–liquid interface to enhance CH4-CO2 hydrate exchange. Our study also highlights the importance of prior information about methane hydrate reservoirs, such as residual water saturation, degree of hydrate saturation and hydrate morphology, before applying the CH4-CO2 hydrate swapping technique.

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