Item talk:Q227961
From geokb
{
"@context": "http://schema.org/", "@type": "WebPage", "additionalType": "Research", "url": "https://www.usgs.gov/centers/central-energy-resources-science-center/science/results-india-national-gas-hydrate-program", "headline": "Results of the India National Gas Hydrate Program Expedition 02", "datePublished": "December 3, 2019", "author": [ { "@type": "Person", "name": "Timothy S Collett", "url": "https://www.usgs.gov/staff-profiles/timothy-s-collett", "identifier": { "@type": "PropertyValue", "propertyID": "orcid", "value": "0000-0002-7598-4708" } } ], "description": [ { "@type": "TextObject", "text": "New technique for accurate porosity estimation from logging-while-drilling nuclear magnetic resonance data, NGHP-02 expedition, offshore, India" }, { "@type": "TextObject", "text": "Fire-in-the-Ice Newsletter Report:Gas Hydrate-Bearing Sand Reservoir Systems in the Offshore of India: Results of the India National Gas Hydrate Program Expedition 02" }, { "@type": "TextObject", "text": "Lithofacies characterization in gas hydrate prospects discovered during Expedition NGHP-02, offshore India" }, { "@type": "TextObject", "text": "Origin of low-chloride fluid in sediments from the eastern continental margin of India, results from the National Gas Hydrate Program Expedition 02" }, { "@type": "TextObject", "text": "Pressure core based onshore laboratory analysis on mechanical properties of hydrate-bearing sediments recovered during India's National Gas Hydrate Program Expedition (NGHP) 02" }, { "@type": "TextObject", "text": "Downhole Log and Seismic Characterization" }, { "@type": "TextObject", "text": "The scientific results of the India National Gas Hydrate Program Expedition 02 (NGHP-02) have been published as a special issue of the Journal of Marine and Petroleum Geology (2019; Volume 108). This Special Issue features a series of four reports that summarize the operational and scientific results of the NGHP-02 Expedition that are presented in the 41 technical reports. The first summary report, \u201cIndia National Gas Hydrate Program Expedition 02: Operational and Technical Summary,\u201d focuses on reviewing the tools and operational procedures for the NGHP-02 Expedition that led to the acquisition of an unprecedented amount of high-quality downhole logging and core data from numerous pore-filling, fracture-filling, and sediment-displacement types of gas hydrate occurrences. The summary report titled \u201cIndia National Gas Hydrate Program Expedition 02 Summary of Scientific Results: Gas Hydrate Systems Along the Eastern Continental Margin of India\u201d documents gas hydrate occurrences discovered during the NGHP-02 Expedition and examines geologic controls on the gas hydrate systems along the eastern continental margin of India. The \u201cIndia National Gas Hydrate Program Expedition 02 Summary of Scientific Results: Evaluation of Natural Gas Hydrate-Bearing Pressure Cores\u201d summary report presents a systematic review of select findings and implications of the coordinated pressure-core evaluation program as described in numerous technical reports within this Special Issue. The summary report titled \u201cIndia National Gas Hydrate Program Expedition 02 Summary of Scientific Results: Numerical Simulation of Reservoir Response to Depressurization\u201d addresses the key issues associated with understanding the potential production response of two gas hydrate accumulations discovered during the NGHP-02 Expedition to scientific depressurization experiments." }, { "@type": "TextObject", "text": "Compressibility and particle crushing of Krishna-Godavari Basin sediments from o\ufb00shore India: Implications for gas production from deep-water gas hydrate deposits" }, { "@type": "TextObject", "text": "Strength characteristics of sediments from a gas hydrate deposit in the Krishna\u2013Godavari Basin on the eastern margin of India" }, { "@type": "TextObject", "text": "Contents: Journal of Marine and Petroleum Geology: Gas Hydrate-Bearing Sand Reservoir Systems in the Offshore of India: Results of the India National Gas Hydrate Program Expedition 02 (Volume 108, 2019). [1]" }, { "@type": "TextObject", "text": "NGHP-02 ObjectiveThe primary objective of the NGHP-02 was the exploration and discovery of highly saturated gas hydrate occurrences in sand reservoirs that could be targets for future production testing. Gas hydrate field production tests, laboratory studies, and computer modeling have documented the fact that gas hydrate hosted in sand-rich reservoirs, can occur at high concentrations and can be produced with existing hydrocarbon production technologies. The major challenges that will need to be dealt with before gas hydrates can be commercialized range from concerns associated with accurately characterizing the occurrence of gas hydrates in nature to the development and testing of production technologies required to safely and efficiently produce gas hydrates. The most pressing need is for the establishment of gas hydrate field production testing projects at the scale required to address the many unknowns associated with production of gas hydrates.NGHP-02 Background and Operations" }, { "@type": "TextObject", "text": "Numerous studies have shown that gas hydrates have the potential to provide an immense resource of natural gas from the world's oceans and polar regions. However, gas hydrates represent both a scientific and technical challenge and more remains to be learned about their characteristics and occurrence in nature. Gas hydrate research at the USGS has mostly focused on: (1) documenting the geologic parameters that control the occurrence and stability of gas hydrates in nature, (2) assessing the volume of natural gas stored within various gas hydrate accumulations, (3) analyzing the production response and characteristics of gas hydrates, (4) identifying and predicting natural and induced environmental and climate impacts of natural gas hydrates, (5) analyzing gas hydrates role as a geohazard, and (6) establishing means to detect and characterize gas hydrate accumulations using geologic and geophysical data." }, { "@type": "TextObject", "text": "In the Krishna-Godavari Basin, extensive reservoir systems were confirmed with sediment grain-sizes ranging from coarse-silts to gravels. These reservoirs range from fully- to partially-filled with gas hydrate. The gas is determined to be from only microbial sources, and in part migrated into the reservoirs from deeper systems. The controls on gas hydrate occurrence are complex and varied; and include substantial reservoir heterogeneity and sufficient permeability throughout the reservoirs and seals that allowed for pervasive fluid flow into and through the hydrate-bearing systems. These discoveries are the most significant confirmation of the exploration approach that focuses on direct detection of hydrate reservoirs supported by comprehensive petroleum systems analyses." }, { "@type": "TextObject", "text": "Origin of gas in gas hydrates as interpreted from geochemistry data obtained during the National Gas Hydrate Program Expedition 02, Krishna Godavari Basin, offshore India" }, { "@type": "TextObject", "text": "PCATS triaxial testing: Geomechanical properties of sediments from pressure cores recovered from the Bay of Bengal during expedition NGHP-02" }, { "@type": "TextObject", "text": "Pressure core analysis of geomechanical and fluid flow properties of seals associated with gas hydrate-bearing reservoirs in the Krishna-Godavari Basin, offshore India" }, { "@type": "TextObject", "text": "Culture based investigations of key microbial functional groups in gas hydrate bearing sediments of the Krishna-Godavari Basin in offshore India" }, { "@type": "TextObject", "text": "Journal of Marine and Petroleum Geology - Special Issue:Geologic Implications of Gas Hydrates in the Offshore of India: Results of the National Gas Hydrate Program Expedition 02" }, { "@type": "TextObject", "text": "Gas hydrate saturation and morphology from analysis of pressure cores acquired in the Bay of Bengal during expedition NGHP-02, offshore India" }, { "@type": "TextObject", "text": "Crystallographic and geochemical properties of natural gas hydrates accumulated in the National Gas Hydrate Program Expedition 02 drilling sites in the Krishna-Godavari Basin o\ufb00 India" }, { "@type": "TextObject", "text": "Consolidation and hardening behavior of hydrate-bearing pressure-core sediments recovered from the Krishna\u2013Godavari Basin, o\ufb00shore India" }, { "@type": "TextObject", "text": "National Gas Hydrate Program expedition 02: Identification of gas hydrate prospects in the Krishna-Godavari Basin, offshore India" }, { "@type": "TextObject", "text": "Pressure Core Acquisition and Analysis" }, { "@type": "TextObject", "text": "Microbiology" }, { "@type": "TextObject", "text": "Formation pressure and fluid flow measurements in marine gas hydrate reservoirs, NGHP-02 expedition, offshore India" }, { "@type": "TextObject", "text": "Techno-economic forecasting of a hypothetical gas hydrate field in the offshore of India" }, { "@type": "TextObject", "text": "Assessment of gas hydrate accumulations using velocities derived from vertical seismic profiles and acoustic log data in Krishna-Godavari Basin" }, { "@type": "TextObject", "text": "Examination of gas hydrate-bearing deep ocean sediments by X-ray Computed Tomography and verification of physical property measurements of sediments" }, { "@type": "TextObject", "text": "Assessing the geomechanical stability of interbedded hydrate-bearing sediments under gas production by depressurization at NGHP-02 Site 16" }, { "@type": "TextObject", "text": "India National Gas Hydrate Program Expedition 02 summary of scientific results: Gas hydrate systems along the eastern continental margin of India (Open Access)" }, { "@type": "TextObject", "text": "India National Gas Hydrate Program Expedition-02: Operational and technical summary" }, { "@type": "TextObject", "text": "India National Gas Hydrate Program Expedition 02 summary of scienti\ufb01c results: Numerical simulation of reservoir response to depressurization" }, { "@type": "TextObject", "text": "What are gas hydrates?" }, { "@type": "TextObject", "text": "NGHP-02 Scientific Results Volume" }, { "@type": "TextObject", "text": "Gas hydrate reservoir identification, delineation, and characterization in the Krishna-Godavari basin using subsurface geologic and geophysical data from the national gas hydrate program 02 expedition, offshore India" }, { "@type": "TextObject", "text": "NGHP-02 Technical Results" }, { "@type": "TextObject", "text": "The NGHP-02 shipboard operations and science program was coordinated by Dr. Timothy Collett of the USGS. USGS scientists also contributed to every phase of NGHP-02 with Dr. William Waite assisting with all aspects of the conventional- and pressure-coring program laboratory studies and Dr. John Pohlman supporting the ship-board geochemistry program. In addition, the USGS also contributed to the post-drilling shore-based analysis phase of the expedition by analyzing geochemical and physical property data and samples collected during the expedition. Additional operational and scientific support was provided by the USGS, the U.S. Department of Energy, the National Institute of Advanced Industrial Science and Technology (AIST), and the Japan Oil, Gas and Metals National Corporation. Dr. Waite and Dr. Junbong Jang, also with the USGS, worked closely with scientists from AIST on the analysis of 25 pressure core samples collected during NGHP-02 from sand reservoirs with high gas hydrate concentrations." }, { "@type": "TextObject", "text": "Evaluation of failure modes and undrained shear strength by cone penetrometer for Natural Gas hydrate-bearing pressure-core sediment samples recovered from the Krishna\u2013Godavari Basin, o\ufb00shore India" }, { "@type": "TextObject", "text": "Lithostratigraphic and Paleoenvironmental Studies" }, { "@type": "TextObject", "text": "The National Gas Hydrate Program (NGHP) in India was initiated by the Ministry of Petroleum and Natural Gas (MoP&NG) in 1997 and in the year 2000, the NGHP was reconstituted by the MoP&NG under the overall coordination of the Directorate General of Hydrocarbons (DGH). The USGS participation in the NGHP effort is enabled through a Memorandum of Understanding with the DGH. The NGHP-02 was planned and managed by the Oil and Natural Gas Corporation Limited of India on behalf of the NGHP and the MoP&NG and the expedition was conducted from 3-March-2015 to 28-July-2015 off the eastern coast of India. The drilling platform was the research D/S Chikyu, operated by the Japanese Drilling Company and the shipboard science program was managed by the Japan Agency for Marine-Earth Science and Technology (JAMSTEC). Logging while drilling (LWD), wireline logging, and formation testing services were provided by Schlumberger. Pressure coring tools were provided by JAMSTEC and shipboard pressure core operations and analysis were provided by Geotek Coring. The first two months of the expedition were dedicated to LWD operations with a total of 25 holes being drilled and logged. The next three months were dedicated to coring operations at ten of the most promising sites." }, { "@type": "TextObject", "text": "NGHP-02 Pre-Expedition Drill-Site Evaluation" }, { "@type": "TextObject", "text": "Lithological properties of natural gas hydrate\u2013bearing sediments in pressure-cores recovered from the Krishna\u2013Godavari Basin" }, { "@type": "TextObject", "text": "Regional stratigraphic framework and gas hydrate occurrence o\ufb00shore eastern India: Core-log-seismic integration of National Gas Hydrate Program Expedition 02 (NGHP-02) Area-B drill sites" }, { "@type": "TextObject", "text": "Operational and Scientific Accomplishments - Summaries" }, { "@type": "TextObject", "text": "Downhole physical property-based description of a gas hydrate petroleum system in NGHP-02 Area C: A channel, levee, fan complex in the Krishna-Godavari Basin offshore eastern India" }, { "@type": "TextObject", "text": "The Government of India, with the support of the U.S. Geological Survey (USGS), has released the initial results of the most comprehensive gas hydrate scientific drilling investigation ever undertaken. Coinciding with the release of the Journal of Marine and Petroleum Geology Special Issue on Marine Gas Hydrate Reservoir Systems Along the Eastern Continental Margin of India: Results of the National Gas Hydrate Program Expedition 02, the leadership of the Indian National Gas Hydrate Program Expedition 02 (NGHP-02) reported on the discovery of several world class gas hydrate accumulations that are suitable for gas hydrate production testing." }, { "@type": "TextObject", "text": "Physical property characteristics of gas hydrate-bearing reservoir and associated seal sediments collected during NGHP-02 in the Krishna-Godavari Basin, in the offshore of India" }, { "@type": "TextObject", "text": "Gas Hydrate Production, Mechanical Testing and Modeling" }, { "@type": "TextObject", "text": "Press Release: USGS Indian Ocean Hydrate Research Press Release" }, { "@type": "TextObject", "text": "Geochemistry" }, { "@type": "TextObject", "text": "Permeability variation and anisotropy of gas hydrate-bearing pressure-core sediments recovered from the Krishna\u2013Godavari Basin, offshore India" }, { "@type": "TextObject", "text": "Constraints on the \ufb02uid supply rate into and through gas hydrate reservoir systems as inferred from pore-water chloride and in situ temperature pro\ufb01les, Krishna-Godavari Basin, India" }, { "@type": "TextObject", "text": "NGHP-02 Operational Highlights" }, { "@type": "TextObject", "text": "2D micromodel study of clogging behavior of \ufb01ne-grained particles associated with gas hydrate production in NGHP-02 gas hydrate reservoir sediments" }, { "@type": "TextObject", "text": "India ONGC News Post:Hydrates Discovery" }, { "@type": "TextObject", "text": "NGHP-02 Technical Results Highlights" }, { "@type": "TextObject", "text": "Numerical simulations of sand migration during gas production in hydrate bearing sands interbedded with thin mud layers at site NGHP-02-16" }, { "@type": "TextObject", "text": "Gas hydrate saturation and reservoir characterization at sites NGHP-02-17 and NGHP-02-19, Krishna Godavari Basin, eastern margin of India" }, { "@type": "TextObject", "text": "Thermal properties of highly saturated methane hydrate-bearing sediments recovered from the Krishna\u2013Godavari Basin" }, { "@type": "TextObject", "text": "Numerical simulations of depressurization-induced gas production from an interbedded turbidite gas hydrate-bearing sedimentary section in the offshore India: Site NGHP-02-16 (Area-B)" }, { "@type": "TextObject", "text": "Permeability anisotropy and relative permeability in sediments from the National Gas Hydrate Program Expedition 02, offshore India" }, { "@type": "TextObject", "text": "India National Gas Hydrate Program Expedition 02 summary of scientific results: Evaluation of natural gas-hydrate-bearing pressure cores" }, { "@type": "TextObject", "text": "Acquisition of Logging-While-Drilling (LWD) Multipole Acoustic log Data during the India National Gas Hydrate Program (NGHP) Expedition 02" }, { "@type": "TextObject", "text": "Evaluation of the performance of the oceanic hydrate accumulation at site NGHP-02-09 in the Krishna-Godavari Basin during a production test and during single and multi-well production scenarios" }, { "@type": "TextObject", "text": "To assess the potential response of discovered gas hydrate deposits to depressurization, comprehensive geologic models were constructed to enable numerical simulation of expected results for two sites. Both sites (Area C: NGHP-02-09 and Area B: NGHP-02-16) feature thick sequences of thinly-interbedded reservoir and non-reservoir facies at sub-seafloor depths less than 300m and sub-sea depths of 2400m or more. These settings pose significant challenges to current modeling capabilities. First, the thinly-interbedded reservoir architecture complicates the determination of basic reservoir parameters from both log and core data due to measurement resolution issues. Secondly, the fine-scale variation in sediment properties imparts great contrasts in key parameters over very short distances, creating high gradients at multiple scales and varying orientations that necessitate careful design of high-definition simulation grids. Thirdly, the deposits include internal sources of water, as well as a range of complex boundary conditions, including variable permeability within the overlying mud-rich \u201cseals,\u201d that complicate reservoir depressurization. Together, these concerns confirm the viability of the modeled accumulations for scientific testing and identify key challenges related to the selection of specific test sites and the design of test wells." }, { "@type": "TextObject", "text": "Gas hydrate occurrence and distribution controlled by regional geological structure off eastern India: Estimates from logging-while-drilling in Area-B, National Gas Hydrate Program Expedition 02 (NGHP-02)" }, { "@type": "TextObject", "text": "Equivalent formation strength as a proxy tool for exploring for the location and distribution of gas hydrates" }, { "@type": "TextObject", "text": "Numerical analysis of gas production potential from a gas-hydrate reservoir at Site NGHP-02-16, the Krishna\u2013Godavari Basin, offshore India\u2013Feasibility of depressurization method for ultra-deepwater environment" }, { "@type": "TextObject", "text": "Porosity, permeability, and grain size of sediment cores from gas-hydrate-bearing sites and their implication for overpressure in shallow argillaceous formations: Results from the National Gas Hydrate Program Expedition 02, Krishna-Godavari Basin, India" }, { "@type": "TextObject", "text": "The formation of highly concentrated gas hydrate accumulations, which are more suitable for energy extraction, requires the presence of relatively coarse-grained sediments with porosity sufficient to support the migration and accumulation of gas, and the nucleation of gas hydrate. The results of downhole logging, coring, and formation pressure testing operations during NGHP-02 have confirmed the presence of extensive sand-rich depositional systems throughout the deepwater portions of the Krishna-Godavari and Mahanadi Basins. Two areas of the Krishna-Godavari Basin, referred to as Areas B and C, contain substantial gas hydrate accumulations in sand-rich systems and therefore represent ideal candidate sites for future gas hydrate production testing." }, { "@type": "TextObject", "text": "Estimate of gas hydrate saturations in the Krishna-Godavari basin, eastern continental margin of India, results of expedition NGHP-02" }, { "@type": "TextObject", "text": "Core Physical Properties" }, { "@type": "TextObject", "text": "The work conducted on the NGHP-02 cores provided confirmation of insights from prior work, including the strong correlations between the nature of the sediment (grain size, sorting, mineralogy), gas hydrate saturation, and sediment strength properties. The effort further confirms recent findings regarding the variability in gas hydrate reservoir quality, most notably the occurrence of permeabilities measured in the tens of milli-Darcys within highly-saturated samples. The studies also indicated fundamentally new insights, perhaps most notably being the recognition of potential impacts of post-depressurization reservoir consolidation on reservoir effective permeabilities." }, { "@type": "TextObject", "text": "Multi-measurement approach for establishing the base of gas hydrate occurrence in the Krishna-Godavari Basin for sites cored during expedition NGHP-02 in the offshore of India" } ], "funder": { "@type": "Organization", "name": "Central Energy Resources Science Center", "url": "https://www.usgs.gov/centers/central-energy-resources-science-center" }, "about": [ { "@type": "Thing", "name": "Methods and Analysis" }, { "@type": "Thing", "name": "Information Systems" }, { "@type": "Thing", "name": "Science Technology" }, { "@type": "Thing", "name": "Gas Hydrates" }, { "@type": "Thing", "name": "Energy" }, { "@type": "Thing", "name": "Environmental Health" }, { "@type": "Thing", "name": "Research" }, { "@type": "Thing", "name": "Water" }, { "@type": "Thing", "name": "Geology" } ]
}
