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Gas Hydrate Exploration Using LWD/MWD in the Ulleung Basin, the East Sea of Korea  

Kim, Gil-Young (Petroleum & Marine Resources Division, Korea Institute of Geoscience and Mineral Resources (KIGAM))
Yoo, Dong-Geun (Petroleum & Marine Resources Division, Korea Institute of Geoscience and Mineral Resources (KIGAM))
Kim, Won-Sik (Petroleum & Marine Resources Division, Korea Institute of Geoscience and Mineral Resources (KIGAM))
Lee, Ho-Young (Petroleum & Marine Resources Division, Korea Institute of Geoscience and Mineral Resources (KIGAM))
Park, Keun-Pil (Petroleum & Marine Resources Division, Korea Institute of Geoscience and Mineral Resources (KIGAM))
Publication Information
Geophysics and Geophysical Exploration / v.11, no.3, 2008 , pp. 263-270 More about this Journal
Abstract
The Gas Hydrate Research and Development Organization (KGHDO) of Korea accomplished successfully geophysical logging (LWD: Logging While Drilling, MWD: Measurement While Drilling) for five sites in 2007, in order to investigate the presence of gas hydrate in the Ulleung Basin, the East Sea of Korea. The togging parameters acquired from LWD/MWD dre electrical resistivity, acoustic velocity, neutron density and porosity, and natural gamma. In addition, pressure, temperature, and diameter of borehole were measured. LWD/MWD data showed several evidences indicating the presence of gas hydrate. Based on LWD/MWD data, three coring sites were selected for sampling of gas hydrate. Subsequently, various gas hydrate samples were collected directly from three sites. Therefore. the presence of gas hydrates was verified by coring. LWD/MWD data will be significantly used to estimate the amount of gas hydrate. Also, they will provide important information to elucidate about sedimentologic characteristics of gas-hydrate bearing formation and sedimentary environment of the Ulleung Basin.
Keywords
gas hydrate; geophysical logging (LWD/MWD); Ulleung Basin;
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