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 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.

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
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