... ABSTRACT Natural gas hydrate attracts wide attention all over the world as an alternative energy. It is buried underground in a wide range of depth and sensitive to the surrounding physical fields. Ambient temperature is an important factor for production due to the geothermal gradient...

... ABSTRACT Natural gas hydrates are one important kind of clean energies, and the technology of hydraulic fracturing has been adopted to increase gas production. Therefore, according to the geological background of the reservoir in the Shenhu area, South China Sea, this paper used numerical...

... software to ensure their rationality. On the basis of hardware circuits, multitasking scheduling was achieved using the FreeRTOS real-time operating system embedded in the chip. INTRODUCTION Natural gas hydrate, often referred to as combustible ice, is a crystalline solid composed of hydrocarbon gases...

... ABSTRACT Deepwater oil and gas resource development can be hindered by hydrates in the shallow layer, which proposed solution is to use a low-hydration early-strength insulating cement system to seal the hydrate layer. The paper establishes guidelines for evaluating the thermal insulation...

... ABSTRACT This paper investigates the sand production issue in the process of natural gas hydrate depressurization production and employs the T-H-M-C coupled model to describe the complex behavior of hydrate decomposition and fluid-solid coupling. A homogeneous geological model was constructed...

... ABSTRACT The submarine transportation of natural gas faces the risk of hydrate flow assurance, and research on hydrate deposition and blockage in undulating pipelines is weak. This study conducted experiments on the flow of hydrates in undulating pipes using a self-built flow loop...

... ABSTRACT The effective exploitation of natural gas hydrates is currently a hot issue of global concern. During the actual extraction process, the secondary generation of hydrates is very likely to lead to blockage of the extraction pipeline, which poses a serious challenge to flow assurance...

... ABSTRACT The purpose of this study is to design an quasi in-situ triaxial testing apparatus for deep-sea sediments, particularly for reservoirs containing natural gas hydrates. This apparatus is intended to interface with existing pressure-retaining transfer equipment to obtain quasi in-situ...

... upstream oil & gas geologist geology asia government china government drilling equipment flow assurance hydrate glycol aqueous solution refrigeration unit heat exchanger hydrate decomposition rstgh drilling operation drilling fluid management & disposal gas hydrate mud...

... upstream oil & gas methane hydrate freezing salinity asia government pipe flexible hose inner tube methane gas gas hydrate japan government flow assurance experiment riser pipe experimental apparatus hydrate seawater evaluation model dynamic condition yamamoto hydrate...

... ABSTRACT In this research, a numerical model is adopted to study the multi-field variations under different original reservoir pressure. According to the exploration cases, the basic properties of hydrate-bearing layers are predesigned and the trial-calculation is carried out. The results...

... ABSTRACT The morphological features of gas hydrate formation in gas-seawater systems were observed using a prove-type microscope video camera. The hydrate was synthesized in a pressure chamber with pressure-tight glass windows for observations. Video observations showed the details of hydrate...

... average temperature shale strength heat flow depositional environment mudstone hydrate temperature variation decomposition equation elsevier hillel modeling annual temperature variation soil temperature soil layer interaction celsuis ABSTRACT Changes in the physical state...

... ABSTRACT In deepwater drilling operations, natural gas may enter the wellbore from oil reservoirs. As the wellbore and pipelines in deepwater wells are under low-temperature and high-pressure conditions, natural gas hydrates are easy to form, which will bring new problems and challenges...

... have reference value for promoting hydrate commercial exploitation. INTRODUCTION Natural gas hydrate (NGH) is an alternative green energy attracting attentions all over the world (Makogon, 1982, 2007). When the ambient conditions are appropriate, especially within the high enough pressure...

... ABSTRACT Natural gas hydrate is considered to be a huge, efficient and clean energy. Understanding the mechanism of fluid flow in hydrate-bearing sediments (HBS) plays an important role in guiding hydrate production. This paper constructs the 3D pore structure of HBS considering...

... and Stratum Response to Marine Hydrate Dissociation Directed by Depressurization Benjian SONG, Yufa HE, Qi FAN, Zhuang WU, Bo YANG, Yunjian ZHOU CNOOC Research Institute, State Key Laboratory of Natural Gas Hydrate Beijing, China ABSTRACT surface because of heterogeneous phase reaction (Feng et al., 2012...

... for example Singh et harsh environmental conditions with very high current and cyclonic al., 1999). Recently, deep-water gas was brought to shore through a conditions with very large waves, high wax contents, hydrates, geo- cooperation between Reliance Industries Limited and BP (Business hazards and high...

... on the description and response to shallow geological hazards. In terms of measures, prediction methods are mainly geophysical methods. The existing technology is difficult to achieve quantitative and accurate prediction of shallow geological disasters, so related work is urgently needed. Natural gas hydrate is one...

... ABSTRACT In order to master the formation law of natural gas hydrate, a series of experiments were carried out by using a high-pressure hydrate flow loop. The influences of macroscopic flow parameters such as outside temperature control, flow rate, initial pressure, water cut and inhibitor...