• gas hydrate risks and prevention for deep water drilling

    Gas hydrate risks and prevention for deep water drilling

    Taking a deep-water exploration well of natural gas located in the Qiongdongnan Basin in the South China Sea as an example, the hydrate risks of the well under operational conditions during drilling and testing processes were analyzed, and the corresponding hydrate prevention solutions were presented and verified by lab experiments and field application.

  • gas hydrate risks and prevention for deep water drilling

    Gas hydrate risks and prevention for deep water drilling

    Gas hydrate risks and prevention for deep water drilling and completion: A case study of well QDN-X in Qiongdongnan Basin, South China Sea

  • research on evaluation and prevention of hydrate

    Research on evaluation and prevention of hydrate

    4. Prevention and control of hydrate risk. After the above analysis, the risk of hydrate formation and blockage in deepwater wellbore has been evaluated. In this part, based on the above hydrate risk analysis results, targeted hydrate prevention measures have been proposed to ensure safe and efficient deepwater gas wells drilling.

  • research on evaluation and prevention of hydrate

    Research on evaluation and prevention of hydrate

    The hydrates formation and blockage in wellbore is directly related to the safety of deepwater gas well drilling. However, the current research on hydrates risk prevention during deepwater drilling is still insufficient. In this work, a novel hydrate formation-blockage risk assessment method in wellbore is proposed. Firstly, a new hydrate formation region (HFR) prediction model consists of

  • gas hydrates in arctic regions: risk to drilling

    Gas Hydrates In Arctic Regions: Risk To Drilling

    Remediation of hydrate-related drilling and production problems has generally followed two courses of action: (1) prevention of hydrate dissociation or (2) promotion of hydrate dissociation. Both approaches involve regulating mud weights and temperatures to control the dissociation of in-situ gas hydrates. INTRODUCTION

  • gas hydrate risks and prevention for deep water drilling

    Gas hydrate risks and prevention for deep water drilling

    Gas hydrate risks and prevention for deep water drilling and completion: A case study of well QDN-X in Qiongdongnan Basin, South China Sea: Zhang Liang; Zhang Chong; Huang Haidong; Qi Dongming; Zhang Yu; Ren Shaoran; Wu Zhiming and Fang Manzong

  • drilling through gas-hydrate sediments: managing

    Drilling Through Gas-Hydrate Sediments: Managing

    Drilling Through Gas-Hydrate Sediments: Managing Wellbore-Stability Risks Authors Tagir Khabibullin The results provide an understanding of the effects of drilling through hydrate-bearing sediments (HBS) and of the impact of drilling-fluid temperature and BHP on changes in temperature and pore pressure within the surrounding sediments. It was found that the amount of gas hydrate that can

  • hydrates represent gas source, drilling hazard oil & gas

    Hydrates represent gas source, drilling hazard Oil & Gas

    Home; Hydrates represent gas source, drilling hazard. It is widely known that gases transform into liquids and then into solid crystals under conditions of low temperature and high pressure.

  • hydrate problems in production petrowiki

    Hydrate problems in production PetroWiki

    Detailed reviews of gas-hydrate chemistry, physics, and oilfield engineering are found in Makogon and Sloan. This page focuses on prevention, inhibition, and removal of hydrates in production. Other pages provide more detail on hydrate formation and predicting hydrate formation.

  • gas hydrates in arctic regions: risk to drilling

    Gas Hydrates In Arctic Regions: Risk To Drilling

    Remediation of hydrate-related drilling and production problems has generally followed two courses of action: (1) prevention of hydrate dissociation or (2) promotion of hydrate dissociation. Both approaches involve regulating mud weights and temperatures to control the dissociation of in-situ gas hydrates. INTRODUCTION

  • gas hydrate risks and prevention for deep water drilling

    Gas hydrate risks and prevention for deep water drilling

    Gas hydrate risks and prevention for deep water drilling and completion: A case study of well QDN-X in Qiongdongnan Basin, South China Sea: Zhang Liang; Zhang Chong; Huang Haidong; Qi Dongming; Zhang Yu; Ren Shaoran; Wu Zhiming and Fang Manzong

  • hydrate-related drilling hazards and their remedies

    Hydrate-Related Drilling Hazards and Their Remedies

    Hydrate-Related Drilling Hazards and their Remedies These problems are represented in figure 4. Figure 4: Pictorial representation of some notable problems encountered while drilling through gas hydrate formation [5] In the rare cases, the water needed for hydrate formation comes from the water-based drilling mud itself. The loss of water from

  • hydrate risks and prevention solutions for a high

    Hydrate risks and prevention solutions for a high

    Hydrate risks and prevention solutions for a high pressure gas field offshore in South China Sea Article in International Journal of Oil Gas and Coal Technology 6(6):613 623 · January 2013 with

  • hydrates represent gas source, drilling hazard oil & gas

    Hydrates represent gas source, drilling hazard Oil & Gas

    Home; Hydrates represent gas source, drilling hazard. It is widely known that gases transform into liquids and then into solid crystals under conditions of low temperature and high pressure.

  • mitigating gas hydrate related drilling risks: a process

    Mitigating Gas Hydrate Related Drilling Risks: A Process

    The potential risks and well problems to be considered due to the presence of gas hydrate while drilling are discussed by Prassl 2. For initial assessment of these risks, the potential existence of solid gas hydrates at the particular well location is needed. For this, a superposition of the gas hydrate stability curve and the natural

  • ogf article gas hydrate control using monoethylene

    OGF Article Gas Hydrate Control Using Monoethylene

    2012-05-24· Hydrate prevention methods include reducing the pressure in the pipeline below the threshold pressure at which hydrates form (for a given temperature), insulating or heating the pipeline to maintain a higher operating temperature, dehydrating the gas to reduce the water content and keep the system above the water dewpoint, and inhibition. Traditional hydrate inhibitors, such as methanol or

  • gas hydrate schlumberger oilfield glossary

    gas hydrate Schlumberger Oilfield Glossary

    Gas-cut muds can form hydrates in deepwater drilling operations, plugging BOP lines, risers and subsea wellheads, causing a well-control risk. Gas hydrates are thermodynamically suppressed by adding antifreeze materials such as salts or glycols. A common practice is to use 20 to 23 wt.% NaCl. Nucleation and growth of hydrates can be dynamically

  • drilling of gas hydrate reservoirs sciencedirect

    Drilling of gas hydrate reservoirs ScienceDirect

    With the consumption of conventional hydrocarbon reserves and advancement in drilling technology, recently there is a high interest in gas hydrates in the world. Due to lack of experience and sensitive nature of gas hydrates, drilling in gas hydrate reservoirs were considered as risky. However, recent drilling data in gas hydrates shows that

  • ogf article gas hydrate control using monoethylene

    OGF Article Gas Hydrate Control Using Monoethylene

    2012-05-24· Hydrate prevention methods include reducing the pressure in the pipeline below the threshold pressure at which hydrates form (for a given temperature), insulating or heating the pipeline to maintain a higher operating temperature, dehydrating the gas to reduce the water content and keep the system above the water dewpoint, and inhibition. Traditional hydrate inhibitors, such as methanol or

  • (pdf) gas hydrate of deep water regions and

    (PDF) GAS HYDRATE OF DEEP WATER REGIONS AND

    Seismic reflection data from the South Caspian Sea, offshore Azerbaijan, prove evidence for buried gas hydrates wellbeneath the seafloor (~300 m), with implications for drilling hazards and

  • research on hydrate formation and prevention during

    Research on hydrate formation and prevention during

    Wellbore cleanup is an important part of deepwater gas wells completion testing and also a critical stage for hydrate formation. For evaluating hydrate risk and proposing specific hydrate

  • an evaluation of risk of hydrate formation at the top

    An Evaluation Of Risk Of Hydrate Formation At The Top

    Hydrate formation is believed to be another serious risk if the inhibitor in the aqueous cannot protect hydrate formation at the top of the pipeline. In this communication we report the results of some preliminary tests conducted in a new experimental set-up constructed for investigating gas hydrate risks in various operational scenarios, e.g., top of pipelines, dead legs/jumpers, start-ups

  • hydrate risks and prevention solutions for a deepdyve

    Hydrate risks and prevention solutions for a DeepDyve

    2013-01-01· Read "Hydrate risks and prevention solutions for a high pressure gas field offshore in South China Sea, International Journal of Oil, Gas and Coal Technology" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at

  • natural gas hydrates: possible environmental issues

    Natural Gas Hydrates: Possible Environmental Issues

    2019-11-17· Zhang L, Zhang C, Huang H, Qi D, Zhang Y, Ren S, Wu Z, Fang M (2014) Gas hydrate risks and prevention for deep water drilling and completion: a case study of well QDN-X in Qiongdongnan Basin, South China Sea, Petroleum Exploration & Development Google Scholar

  • hydrate formation in gas systems neutrium

    Hydrate Formation in Gas Systems Neutrium

    2015-06-30· Hydrate formation represents a significant risk to process safety as it can result in the plugging of both pipes and instruments. Hydrates typically form in process where light hydrocarbons, water vapor and low temperatures or high pressures are present. This article describes the conditions under which hydrates form, how formation may be prevented and what can be done once hydrates

  • hydrate prevention with gas expansion, subsurface heat

    Hydrate prevention with gas expansion, subsurface heat

    Hydrate prevention with gas expansion, subsurface heat. C. Falappa Elf Idrocarburi Italiana Hydrate formation curve for the Santo Stefano Mere gas [35,888 bytes] The development and production of gas field often suffer from the problem of gas hydrate formation in transport lines. If hydrate deposits, which result from a too-low temperature of

  • potential effects of gas hydrate on human welfare pnas

    Potential effects of gas hydrate on human welfare PNAS

    Risks to drilling and production through gas hydrate-bearing sediment have been addressed by Yakushev and Collett for gas hydrate in Arctic regions, and these same concerns, such as casing collapse, gas leakage outside the conductor casing, and gas blowouts, will be applicable to gas hydrate of deep oceanic regions, only the problems will likely be more severe, but not necessarily as severe as

  • safety risk management of drilling operations onepetro

    Safety Risk Management of Drilling Operations OnePetro

    A complete drilling safety risk management system can also be gradually developed in the process of risk identification, record, report, analysis, control, mitigation and prevention. The intelligent safety risk management software of drilling operations has been applied in some oilfields, and reveals excellent application prospects. Being an

  • hydrates petrowiki

    Hydrates PetroWiki

    It is likely that useful production information will be obtained by studying ocean hydrate effects on sediment slumping, related to subsea-structure foundations and the climate, which are currently largely unknown. During the next decade, gas production will begin from permafrost hydrates associated with conventional gas reservoirs. However

  • potential effects of gas hydrate on human welfare pnas

    Potential effects of gas hydrate on human welfare PNAS

    Risks to drilling and production through gas hydrate-bearing sediment have been addressed by Yakushev and Collett for gas hydrate in Arctic regions, and these same concerns, such as casing collapse, gas leakage outside the conductor casing, and gas blowouts, will be applicable to gas hydrate of deep oceanic regions, only the problems will likely be more severe, but not necessarily as severe as

  • methane clathrate

    Methane clathrate

    Methane clathrate (CH 4 ·5.75H 2 O) or (4CH 4 ·23H 2 O), also called methane hydrate, hydromethane, methane ice, fire ice, natural gas hydrate, or gas hydrate, is a solid clathrate compound (more specifically, a clathrate hydrate) in which a large amount of methane is trapped within a crystal structure of water, forming a solid similar to ice.

  • natural gas hydrates: possible environmental issues

    Natural Gas Hydrates: Possible Environmental Issues

    2019-11-17· Zhang L, Zhang C, Huang H, Qi D, Zhang Y, Ren S, Wu Z, Fang M (2014) Gas hydrate risks and prevention for deep water drilling and completion: a case study of well QDN-X in Qiongdongnan Basin, South China Sea, Petroleum Exploration & Development Google Scholar

  • gas hydrates 1: lab work clarifies gas hydrate

    GAS HYDRATES 1: Lab work clarifies gas hydrate

    Methanol is commonly injected in the fluid stream in an attempt to prevent the formation of gas hydrates. The methanol for preventing hydrate plugs costs the industry more than $1 million/day

  • ogf article an evaluation of risk of hydrate formation

    OGF Article An Evaluation of Risk of Hydrate Formation

    The reported three series of tests conducted in the new experimental setup address hydrate-formation risks at the top of pipelines or deadlegs caused by temperature gradient, and the risk of hydrate formation in the gas phase in the presence of kinetic hydrate inhibitors (KHIs) during pipeline cool down and startup. The results provide a better

  • hydrate risk assessment and restart-procedure optimization

    Hydrate Risk Assessment and Restart-Procedure Optimization

    hydrate formation and transportability, the gas-hydrate model can be applied to design and optimize oil/gas-transport facilities, focusing on prevention, management, or remediation of gas hydrates in flowlines. This paper briefly presents a gas-hydrate model specially designed for oil-dominated systems, which has been incorporated as a plug-in

  • prevention of hydrate formation on gas well

    PREVENTION OF HYDRATE FORMATION ON GAS WELL

    PREVENTION OF HYDRATE FORMATION ON GAS WELL Ildikó Bölkény1, József Konyha1 1 Assistant Research Scientist 1 University of Miskolc, Research Institute of Applied Earth Sciences ABSTRACT Gas hydrates can cause serious problems in oil- and gas industry. It can be formed by

  • gas hydrates: resource and hazard

    Gas Hydrates: Resource and Hazard

    Gas Hydrates: Resource and Hazard Roy Boswell and Timothy S. Collett, “The Gas Hydrate Resource Pyramid,” Fire in the Ice, Methane Gas hydrates are a significant hazard for drilling and production operations.12 Gas hydrate 12 Gas hydrate

  • gas hydrates and flow assurance of reservoir fluids

    Gas Hydrates and Flow Assurance of Reservoir Fluids

    Gas Hydrates and Flow Assurance of Reservoir Fluids Description This 5 day course covers various aspects of flow assurance (i.e. gas hydrate, wax, asphaltene, scale, corrosion, emulsion) with particular emphasis on gas hydrates. In each case the nature of the problem is discussed and the various testing techniques, risk evaluation, and

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