... 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...

... ABSTRACT The rapid sampling technology for marine gas hydrate (RSTGH) is proposed to improve the efficiency of hydrate resource evaluation. RSTGH mainly consists of hydraulic reverse circulation sampling (HRCS) apparatus and mud cooling system. By Lab tests of mud cooling system...

... 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 We carried out two preliminary experiments (under the atmospheric pressure and high-pressure conditions) to estimate the inside situation of the riser pipe and the risk due to freezing of the methane hydrate slurry during the transfer process, which are aiming to construct a numerical...

... ABSTRACT Changes in the physical state of fluid caused by the temperature in saturated soil is an important thermodynamic phenomenon affecting soil and shallow hydrate reservoirs. During the fluid-soil interaction, once the shale formation is flooded, the compressive strength of the mud-shale...

... 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...

... 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...

... production logging flow assurance directional drilling production monitoring upstream oil & gas hydrate production control drillpipe heat capacity specific heat capacity flow rate temperature profile horizontal lenth drilling operation reservoir surveillance heat transfer...

... 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 A short abstract Submarine natural gas hydrate production presents many challenges which include gas productivity and potential geologic disaster. Stratum subsidence, marine slope slide, sand production and wellbore instability are the typical geological risks. Due to the complexity...

... 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...

...ABSTRACT 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...

...ABSTRACT ABSTRACT Extensive studies had been conducted aimed at the natural gas hydrate accumulation systems in the Muli frozen soil region in the Qilian Mountain, but the rule of natural gas hydrate accumulation was still unclear. Based on the audio magnetotelluric test data obtained for five...

...ABSTRACT ABSTRACT Preventing secondary hydrate formation caused by low temperature and the high-pressure environment is one of the key factors for the success of offshore gas hydrate production test. In this paper, a dynamic Bayesian network and GO (DBN-GO) model are used to build a successful...

... ABSTRACT Hydrate phase transitions under different conditions, such as multi-component gases, oil-water mixture and throats sized 30μm – 60μm have been simulated by micro-experimental method. The results indicate that direct observation is effective and images contain abundant information...

... ABSTRACT As an important green energy source, the presence of gas hydrates very demanding. They are only found on the seabed at a depth of kilometer. Large-scale exploitation of natural gas hydrates is likely to cause dramatic changes in the seabed topography, resulting in certain risks...

... Experimental Study and Modeling of Methane Hydrate Dissociation by Depressurization and Chemical Injection Tingji Ding, Ruihe Wang*, Jiafang Xu*, Xiaopu Wang, Zhenglian Yu, Yuanfang Cheng, Zhiyuan Wang School of Petroleum Engineering, China University of Petroleum (East China) Qingdao, Shandong...

... ABSTRACT In this paper, we conducted simulations of hydrate with different saturation under different confining pressure based on a series of trial compression experiments. M-C and D-P models were applied respectively to calculate hydrate sediment yield stress. After comparing simulation...

... ABSTRACT Hydrate reformation could occur inside the production pipeline and is a crucial issue for methane hydrate production. In this work, the feasibility of inhibiting hydrate reformation with under-inhibition of MEG was investigated experimentally and economically. To understand...

...-ray CT based printed sand and hydratebearing sand showed reasonable permeability reduction due to hydrate existence. INTRODUCTION Three-dimensional (3D) printing technology has been in use since the 1980s. This technology has been particularly useful where there is need for fast design...