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    ๆทธๅญธๆ›ธ ๅฐๅ…’่ซ–์˜ ๅ‡บ่™•์— ๊ด€ํ•œ ์—ฐ๊ตฌ

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    ํ•™์œ„๋…ผ๋ฌธ (์„์‚ฌ)-- ์„œ์šธ๋Œ€ํ•™๊ต ๋Œ€ํ•™์› : ์–ธ์–ดํ•™๊ณผ, 2014. 2. ๊น€์ฃผ์›.ๆทธๅญธๆ›ธ(์ฒญํ•™์„œ) โ‰ชๅฐๅ…’่ซ– (์†Œ์•„๋ก )โ‰ซ์€ ์—ฌ์ง„ํ•™์„œ โ‰ช์†Œ์•„๋ก โ‰ซ์„ ๋ฐ”ํƒ•์œผ๋กœ ์กฐ์„ ์ค‘๊ธฐ์— ๅธ่ญฏ้™ข(์‚ฌ์—ญ์›)์—์„œ ์ถœ๊ฐ„ํ•œ ์ฒญ์–ด ํ•™์Šต์„ ์œ„ํ•œ ์ฒญํ•™์„œ์ด๋‹ค. ๋ณธ๊ณ ์—์„œ๋Š” ์ด โ‰ช์†Œ์•„๋ก โ‰ซ์˜ ์ถœ์ฒ˜๋ฅผ ๋ฐํžˆ๋Š”๋ฐ ๊ทธ ๋ชฉ์ ์ด ์žˆ๋‹ค. ์ผ๋ช… ้ …่จ—(ํ•ญํƒ) ์„คํ™”์— ๋ฐ”ํƒ•์„ ๋‘” ์ด ์ฑ…์€ ๊ทธ ์ œ๋ชฉ์€ ๆ˜Žไปฃ(๋ช…๋Œ€)์— ์œ ํ–‰ํ•œ โ‰ช์†Œ์•„๋ก โ‰ซ์— ๋ฐ”ํƒ•์„ ๋‘๊ณ  ์žˆ๊ณ  ๊ทธ ๋‚ด์šฉ์€ ํ›„๋Œ€์— ์œ ํ–‰ํ•œ ้€šๅ‹(ํ†ต์Šน)์˜ โ‰ช์†Œ์•„๋ก โ‰ซ๋ณด๋‹ค๋Š” ๆ•ฆ็…Œ(๋ˆํ™ฉ)์—์„œ ๋ฐœ๊ตด๋œ ์ด์•ผ๊ธฐ์— ๋”์šฑ ์œ ์‚ฌํ•œ ๋‚ด์šฉ์„ ๋‹ด๊ณ  ์žˆ๋‹ค. ๊ทธ๋Ÿฌ๋‚˜ ์ฒญํ•™์„œ ์†Œ์•„๋ก ์„ ํ†ตํ•ด ํ•œ๊ตญ์— ๊ทธ๋ฆฌ๊ณ  โ‰ชไปŠๆ˜”็‰ฉ่ชž้›† (๊ธˆ์„๋ฌผ์–ด์ง‘)โ‰ซ์„ ํ†ตํ•ด ์ผ๋ณธ์— ์ „ํ•ด์ง„ ์ด์•ผ๊ธฐ์—๋Š” ๊ทธ ๋ชฉ์ ์— ๋”ฐ๋ผ ์›์ „์„ ๊ทธ๋Œ€๋กœ ๋”ฐ๋ฅด๊ธฐ๋ณด๋‹ค๋Š” ๊ทธ ์ฑ…์˜ ์“ฐ์ž„์— ๋”ฐ๋ผ ๋‚ด์šฉ์˜ ๊ฐ€๊ฐ์ด ์žˆ์Œ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค. โ‰ช์†Œ์•„๋ก โ‰ซ์˜ ์ถœ์ฒ˜๋ฅผ ์ฐพ๊ธฐ ์œ„ํ•œ ์ •๋ฐ€ํ•œ ๋น„๊ต์—ฐ๊ตฌ๋ฅผ ์œ„ํ•˜์—ฌ ์ฒญ์–ด โ‰ช์†Œ์•„๋ก โ‰ซ์˜ ์ œ5๋ฌธ๋‹ต์„ ์ค‘์‹ฌ์œผ๋กœ ์ฃผ์š”์–ด ๋ถ„์„์„ ํ•˜์˜€๋‹ค. ๋ณธ๊ณ ์—์„œ๋Š” ์ฒญ์–ด โ‰ช์†Œ์•„๋ก โ‰ซ ๋ฐ ํ†ต์Šน์˜ โ‰ช์†Œ์•„๋ก โ‰ซ, โ‰ช้จŽ้ป‘็‰›็š„ๅฐ‘ๅนดๅ‚ณ (๊ธฐํ‘์šฐ์ ์†Œ๋…„์ „)โ‰ซ, โ‰ช๊ณต์žํ•ญํƒ์ƒ๋ฌธ์„œโ‰ซ, โ‰ชP.T. 992(Pelliot Tibetain 992)โ‰ซ: ๊ณต์žํ•ญํƒ์ƒ๋ฌธ์„œ์˜ ์žฅ๋ฌธ๋ณธ(่—ๆ–‡ๆœฌ), โ‰ช๊ธˆ์„๋ฌผ์–ด์ง‘โ‰ซ์˜ ์„คํ™”๋ฅผ ๋ฉด๋ฐ€ํžˆ ๋น„๊ต๋ถ„์„ํ•˜์˜€๋‹ค. ์ฒญ์–ด โ‰ช์†Œ์•„๋ก โ‰ซ์€ ์–ด๋–ค ์ฑ…์„ ๋ณด๊ณ  ๊ทธ๋Œ€๋กœ ์“ด ์ฑ…์ด ์•„๋‹ˆ๋ผ ๊ธฐ๋ณธ ์–ดํ•™์„œ๋กœ์„œ์˜ ๋ชฉ์ ์„ ์œ„ํ•ด์„œ ๊ฐ™์€ ๋ฌธ์žฅ์ด ๋ฐ˜๋ณต๋˜๋ฉฐ โ‰ช๊ณต์žํ•ญํƒ์ƒ๋ฌธ์„œโ‰ซ์™€ ๋น„๊ตํ•  ๋•Œ ์–ด๋ ค์›Œ ๋ณด์ด๋Š” ๋ถ€๋ถ„์€ ์‚ญ์ œ๋˜์–ด์žˆ์Œ์„ ์ฐพ์•„๋ณผ ์ˆ˜ ์žˆ์—ˆ๋‹ค.1. ๋จธ๋ฆฌ๋ง 1 1.1 ์—ฐ๊ตฌ์˜ ๋ชฉ์  1 1.2. ์•ž์„  ์—ฐ๊ตฌ ๊ฐœ๊ด€ 1 1.3. ์—ฐ๊ตฌ ๋ฐฉ๋ฒ• 3 1.4. ๋‹ค๋ฃฐ ์ž๋ฃŒ 4 1.5. ๊ด€๋ จ ์ž๋ฃŒ ๊ฐœ๊ด€ 5 1.5.1. ์ฒญ์–ด โ‰ช์†Œ์•„๋ก โ‰ซ 5 1.5.2. ํ†ต์Šน์˜ โ‰ช์†Œ์•„๋ก โ‰ซ 7 1.5.3. ๅญ”ๅญ้ …่จ—็›ธๅ•ๆ›ธ 8 1.5.4. P.T. 992(Pelliot Tibetain 992) 9 1.5.5. ไปŠๆ˜”็‰ฉ่ชž้›† 9 1.5.6. ่ฅฟ่’™ๅคๆฐ‘้–“ๆ•…ไบ‹ โ‰ช้จŽ้ป‘็‰›็š„ๅฐ‘ๅนดๅ‚ณโ‰ซ 9 2. ๊ณ ๋ฌธํ—Œ์˜ ๋ฒˆ์—ญ ์–‘์ƒ 11 2.1. ๊ฐœ์š” 11 2.2. ์„๋ณด์ƒ์ ˆ 11 2.3. ์‚ผ๊ฐ•ํ–‰์‹ค๋„ 11 2.4 ์ง์—ญ๊ณผ ์˜์—ญ 14 3. ์ฒญ์–ด โ‰ช์†Œ์•„๋ก โ‰ซ๊ณผ ํ•ญํƒ์„คํ™”(ํ†ต์Šน์˜ โ‰ช์†Œ์•„๋ก โ‰ซ) 16 3.1. ์ฒญ์–ด โ‰ช์†Œ์•„๋ก โ‰ซ๊ณผ ํ†ต์Šน์˜ โ‰ช์†Œ์•„๋ก โ‰ซ์˜ ๋น„๊ต 16 3.2. ์ž๋ฃŒ ์ „์ฒด ๊ฐœ๊ด€ 26 3.3. ๋‚ด์šฉ ๋ถ„์„ 26 3.3.1. ๋„์ž…๋ถ€ 27 3.3.2. ์ œ1๋ฌธ๋‹ต 27 3.3.3. ์ œ2๋ฌธ๋‹ต 27 3.3.4. ์ œ3๋ฌธ๋‹ต 27 3.3.5. ์ œ4๋ฌธ๋‹ต 28 3.3.6. ์ œ5๋ฌธ๋‹ต 28 3.3.7. ์ œ6๋ฌธ๋‹ต 29 3.3.8. ์ œ7๋ฌธ๋‹ต 29 3.3.9. ๋งˆ๋ฌด๋ฆฌ 30 4. ์ฒญ์–ด โ‰ช์†Œ์•„๋ก โ‰ซ๊ณผ โ‰ช๊ณต์žํ•ญํƒ์ƒ๋ฌธ์„œโ‰ซ 31 4.1. โ‰ช๊ณต์žํ•ญํƒ์ƒ๋ฌธ์„œโ‰ซ 31 4.2. ์ฒญ์–ด โ‰ช์†Œ์•„๋ก โ‰ซ๊ณผ โ‰ช๊ณต์žํ•ญํƒ์ƒ๋ฌธ์„œโ‰ซ์˜ ๋น„๊ต 35 4.3. ๋‚ด์šฉ ๋ถ„์„ 42 4.3.1. ๋„์ž…๋ถ€ (์ œ1๋ฌธ๋‹ต ์•ž๋ถ€๋ถ„) 42 4.3.2. ์ œ1๋ฌธ๋‹ต 42 4.3.3. ์ œ2๋ฌธ๋‹ต 43 4.3.4. ์ œ3๋ฌธ๋‹ต 43 4.3.5. ์ œ4๋ฌธ๋‹ต 44 4.3.6. ์ œ5๋ฌธ๋‹ต 44 4.3.7. ์ œ6๋ฌธ๋‹ต 45 4.3.8. ์ œ7๋ฌธ๋‹ต 46 4.3.9. ๋งˆ๋ฌด๋ฆฌ 47 4.4. โ‰ช๊ณต์žํ•ญํƒ์ƒ๋ฌธ์„œโ‰ซ์—์„œ ์‚ญ์ œ๋˜์—ˆ๊ฑฐ๋‚˜ ํ˜น์€ ์ฒญ์–ด โ‰ช์†Œ์•„๋ก โ‰ซ์— ์—†๋Š” โ‰ช๊ณต์žํ•ญํƒ์ƒ๋ฌธ์„œโ‰ซ์˜ ๋‚ด์šฉ 47 4.4.1. ๋ฌธ๋‹ต 1์˜ ํ›„๋ฐ˜๋ถ€ 47 4.4.2. ๋ฌธ๋‹ต 3์˜ ํ›„๋ฐ˜๋ถ€ 48 4.4.3. ๋ฌธ๋‹ต 7 48 4.4.4. ๋ฌธ๋‹ต 9 48 5. ์ฒญ์–ด โ‰ช์†Œ์•„๋ก โ‰ซ๊ณผ P.T. 992 50 5.1. ๆ•ฆๆƒถๅค่—ๆ–‡ P.T. 992 โ‰ช๊ณต์žํ•ญํƒ์ƒ๋ฌธ์„œโ‰ซ 50 5.2. ์ฒญ์–ด โ‰ช์†Œ์•„๋ก โ‰ซ๊ณผ P.T. 992์˜ ๋น„๊ต 53 5.3. ๋‚ด์šฉ๋ถ„์„ 59 5.3.1. ๋„์ž…๋ถ€ 59 5.3.2. ์ œ1๋ฌธ๋‹ต 59 5.3.3. ์ œ2๋ฌธ๋‹ต, ์ œ4๋ฌธ๋‹ต 60 5.3.4. ์ œ3๋ฌธ๋‹ต 60 5.3.5. ์ œ5๋ฌธ๋‹ต 60 5.3.6. ์ œ6๋ฌธ๋‹ต ๋ฐ ์ œ7๋ฌธ๋‹ต 61 5.3.7. ๋งˆ๋ฌด๋ฆฌ 61 6. ์ฒญ์–ด โ‰ช์†Œ์•„๋ก โ‰ซ๊ณผ โ‰ช๊ธˆ์„๋ฌผ์–ด์ง‘โ‰ซ 63 6.1. ๊ฐœ์š” 63 6.2. โ‰ช๊ธˆ์„๋ฌผ์–ด์ง‘โ‰ซ 63 6.3 ์ฒญ์–ด โ‰ช์†Œ์•„๋ก โ‰ซ๊ณผ โ‰ช๊ธˆ์„๋ฌผ์–ด์ง‘โ‰ซ์˜ ๋น„๊ต 66 6.4. ๋‚ด์šฉ ๋ถ„์„ 71 7. ์ฒญ์–ด โ‰ช์†Œ์•„๋ก โ‰ซ๊ณผ โ‰ช๊ธฐํ‘์šฐ์ ์†Œ๋…„์ „โ‰ซ 73 7.1. โ‰ช๊ธฐํ‘์šฐ์ ์†Œ๋…„์ „โ‰ซ 73 7.2. ์ฒญ์–ด โ‰ช์†Œ์•„๋ก โ‰ซ๊ณผ โ‰ช๊ธฐํ‘์šฐ์ ์†Œ๋…„์ „โ‰ซ์˜ ๋น„๊ต 81 7.3. ๋‚ด์šฉ๋ถ„์„ 87 7.3.1. ๋„์ž…๋ถ€ 87 7.3.2. ์ œ1๋ฌธ๋‹ต 87 7.3.3. ์ œ2๋ฌธ๋‹ต-์ œ4๋ฌธ๋‹ต 88 7.3.4. ์ œ5๋ฌธ๋‹ต 88 7.3.5. ์ œ6๋ฌธ๋‹ต 89 7.3.6. ์ œ7๋ฌธ๋‹ต 89 7.3.7. โ‰ช๊ธฐํ‘์šฐ์ ์†Œ๋…„์ „โ‰ซ์˜ ๋ฌธ๋‹ต 11 90 7.3.8. ๋งˆ๋ฌด๋ฆฌ 90 8. ์†Œ์•„๋ก  ๊ด€๋ จ ์ž๋ฃŒ์˜ ๋ถ„์„ ์ข…ํ•ฉ 91 8.1. ๋Œ€ํ™”์˜ ์ฃผ์ฒด 91 8.2. ํ•ญํƒ์„คํ™”๊ฐ€ ์ „ํŒŒ๋œ ๋‚˜๋ผ์˜ ํŠน์ง• 91 8.3. ๊ฐ ์ž๋ฃŒ์˜ ํ•ญ๋ชฉ๋ณ„ ์ผ์น˜ ์ •๋„ 92 9. ๊ฒฐ๋ก  93 95 Abstract 98Maste

    A Study on the Field Development Planning through Productivity Analysis of Onshore Shallow Gas

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    Shallow gas is a natural gas that is buried at a depth of less than 1,500m and is widely distributed around the world. It has lower reservoir pressure and smaller scale compared to conventional deep gas, and has been considered as a risk factor in developing deep gas from the past. However, due to the recent decrease in the discovery of new gas fields and increased demand for natural gas, interests in shallow gas is increasing. Shallow gas fields are being developed commercially in various regions such as North America, Europe, and Asia. Also, as shallow gas was discovered in Daejam-dong, Pohang in March 2017, the expectation for domestic development is increasing, and the necessity of research has been highlighted. These gas fields are differ by the reservoir properties and forms depending on the existent area, and there are fewer development cases than deep gas fields. Therefore, there is a lack of research on the uncertainty of the field development planning and reservoir characteristics that affect the economic feasibility of gas field development. In this study, the original gas in place was evaluated with a reservoir model that was developed reflecting the forms and properties of the shallow gas reservoir. Also, productivity analysis and economic analysis were performed according to production operating conditions. As a result, the application period of the material balance method for the evaluation of the original gas in place in shallow gas reservoir model was identified, and the development planning was conducted through productivity and economic analysis according to production operating conditions. In addition, the effects of reservoir characteristics on productivity was analyzed and the minimum economic field size(MEFS), a reserve of zero net present value, was determined due to the development plan. As a result, the effects of porosity, permeability, and initial reservoir pressure on the development of onshore shallow gas field were confirmed, and the development plan was identified the reserves that could secure economic feasibility. The results of this study could be used as fundamental data in selecting field development plan for shallow gas. In addition, it can be used to confirm development plan through productivity analysis with the additional information on the properties of Pohang shallow gas reservoir.|์ฒœ๋ถ€๊ฐ€์Šค๋Š” 1,500m ์ดํ•˜์˜ ์‹ฌ๋„์— ๋ถ€์กด๋˜์–ด ์žˆ๋Š” ์ฒœ์—ฐ๊ฐ€์Šค๋กœ ์ „ ์„ธ๊ณ„์ ์œผ๋กœ ๊ด‘๋ฒ”์œ„ํ•˜๊ฒŒ ๋ถ„ํฌํ•˜๊ณ  ์žˆ๋‹ค. ์ผ๋ฐ˜์ ์ธ ์‹ฌ๋ถ€๊ฐ€์Šค์— ๋น„ํ•ด ์ €๋ฅ˜์ธต ์••๋ ฅ์ด ๋‚ฎ๊ณ  ๊ทœ๋ชจ๊ฐ€ ์ž‘์œผ๋ฉฐ, ๊ณผ๊ฑฐ๋ถ€ํ„ฐ ์‹ฌ๋ถ€๊ฐ€์Šค ๊ฐœ๋ฐœ ์‹œ ์œ„ํ—˜์š”์†Œ๋กœ ๊ณ ๋ ค๋˜์–ด ์™”๋‹ค. ํ•˜์ง€๋งŒ ์ตœ๊ทผ ์‹ ๊ทœ ๊ฐ€์Šค์ „ ๋ฐœ๊ฒฌ ๊ฐ์†Œ ๋ฐ ์ฒœ์—ฐ๊ฐ€์Šค ์ˆ˜์š” ์ฆ๊ฐ€๋กœ ์ธํ•ด ์ฒœ๋ถ€๊ฐ€์Šค์— ๋Œ€ํ•œ ๊ด€์‹ฌ์ด ์ฆ๊ฐ€ํ•˜๊ณ  ์žˆ์œผ๋ฉฐ, ๋ถ๋ฏธ, ์œ ๋Ÿฝ, ์•„์‹œ์•„ ๋“ฑ์˜ ๋‹ค์–‘ํ•œ ์ง€์—ญ์—์„œ ์ƒ์—…์  ๊ฐœ๋ฐœ์„ ์ง„ํ–‰ํ•˜๊ณ  ์žˆ๋‹ค. ๋˜ํ•œ 2017๋…„ 3์›”, ํฌํ•ญ ๋Œ€์ž ๋™์—์„œ ์ฒœ๋ถ€๊ฐ€์Šค๊ฐ€ ๋ฐœ๊ฒฌ๋จ์— ๋”ฐ๋ผ ๊ตญ๋‚ด ๊ฐœ๋ฐœ ๊ฐ€๋Šฅ์„ฑ์— ๋Œ€ํ•œ ๊ธฐ๋Œ€๊ฐ€ ์ฆ๊ฐ€ํ•˜๊ณ  ์žˆ์œผ๋ฉฐ, ์—ฐ๊ตฌ์˜ ํ•„์š”์„ฑ์ด ๋ถ€๊ฐ๋˜๊ณ  ์žˆ๋‹ค. ์ด๋Ÿฌํ•œ ์ฒœ๋ถ€๊ฐ€์Šค๋Š” ๋ถ€์กด ์ง€์—ญ์— ๋”ฐ๋ผ ์ €๋ฅ˜์ธต ๋ฌผ์„ฑ ๋ฐ ํ˜•ํƒœ๊ฐ€ ์ƒ์ดํ•˜๊ณ  ์‹ฌ๋ถ€๊ฐ€์Šค์— ๋น„ํ•ด ๊ฐœ๋ฐœ ์‚ฌ๋ก€๊ฐ€ ์ ๋‹ค. ์ด์— ๊ฐ€์Šค์ „ ๊ฐœ๋ฐœ ์‹œ ์‚ฌ์—…์˜ ๊ฒฝ์ œ์„ฑ์— ์˜ํ–ฅ์„ ๋ฏธ์น˜๋Š” ๊ฐœ๋ฐœ๊ณ„ํš ์ˆ˜๋ฆฝ ๋ฐ ์ €๋ฅ˜์ธต ํŠน์„ฑ์˜ ๋ถˆํ™•์‹ค์„ฑ์— ๋Œ€ํ•œ ์—ฐ๊ตฌ๊ฐ€ ๋ถ€์กฑํ•œ ์‹ค์ •์ด๋‹ค. ์ด ์—ฐ๊ตฌ์—์„œ๋Š” ์ฒœ๋ถ€๊ฐ€์Šค ๋ถ€์กด ์ง€์—ญ์˜ ํ˜•ํƒœ ๋ฐ ๋ฌผ์„ฑ์„ ๋ฐ˜์˜ํ•œ ์ €๋ฅ˜์ธต ๋ชจ๋ธ์„ ๊ตฌ์ถ•ํ•˜์—ฌ ์›์‹œ๊ฐ€์Šค๋ถ€์กด๋Ÿ‰ ํ‰๊ฐ€๋ฅผ ์ˆ˜ํ–‰ํ•˜๊ณ , ์ƒ์‚ฐ์šด์˜์กฐ๊ฑด์— ๋”ฐ๋ฅธ ์ƒ์‚ฐ์„ฑ ๋ถ„์„ ๋ฐ ๊ฒฝ์ œ์„ฑ ํ‰๊ฐ€๋ฅผ ์ˆ˜ํ–‰ํ•˜์˜€๋‹ค. ๊ทธ ๊ฒฐ๊ณผ, ์ฒœ๋ถ€๊ฐ€์Šค ์ €๋ฅ˜์ธต ๋ชจ๋ธ์˜ ์›์‹œ๊ฐ€์Šค๋ถ€์กด๋Ÿ‰ ํ‰๊ฐ€์— ๋Œ€ํ•œ ๋ฌผ์งˆ์ˆ˜์ง€๋ฒ•์˜ ์ ์šฉ์‹œ๊ธฐ๋ฅผ ํŒŒ์•…ํ•˜์˜€์œผ๋ฉฐ, ์ƒ์‚ฐ์šด์˜์กฐ๊ฑด์— ๋”ฐ๋ฅธ ์ƒ์‚ฐ์„ฑ ๋ฐ ๊ฒฝ์ œ์„ฑ ๋ถ„์„์„ ํ†ตํ•ด ๊ฐœ๋ฐœ๊ณ„ํš์„ ์ˆ˜๋ฆฝํ•˜์˜€๋‹ค. ๋˜ํ•œ ์ƒ์‚ฐ์„ฑ์— ๋Œ€ํ•œ ์ €๋ฅ˜์ธต ๋ฌผ์„ฑ์˜ ์˜ํ–ฅ์„ ๋ถ„์„ํ•˜์˜€์œผ๋ฉฐ, ๊ฐœ๋ฐœ๊ณ„ํš์— ๋”ฐ๋ผ ์ˆœํ˜„์žฌ๊ฐ€์น˜๊ฐ€ 0์ด ๋˜๋Š” ๋งค์žฅ๋Ÿ‰์ธ MEFS(Minimum Economic Field Size)๋ฅผ ํŒŒ์•…ํ•˜์˜€๋‹ค. ์ด๋ฅผ ํ†ตํ•ด ์œก์ƒ ์ฒœ๋ถ€๊ฐ€์Šค์ „ ๊ฐœ๋ฐœ ์‹œ ๊ณต๊ทน๋ฅ , ์œ ์ฒดํˆฌ๊ณผ๋„, ์ €๋ฅ˜์ธต ์ดˆ๊ธฐ์••๋ ฅ์ด ๋ฏธ์น˜๋Š” ์˜ํ–ฅ์„ ํ™•์ธํ•˜์˜€์œผ๋ฉฐ, ๊ฐœ๋ฐœ๊ณ„ํš์ด ๊ฒฝ์ œ์„ฑ์„ ํ™•๋ณดํ•  ์ˆ˜ ์žˆ๋Š” ๋งค์žฅ๋Ÿ‰์„ ์˜ˆ์ธกํ•˜์˜€๋‹ค. ํ–ฅํ›„ ์ด ์—ฐ๊ตฌ๊ฒฐ๊ณผ๋Š” ์ฒœ๋ถ€๊ฐ€์Šค ๊ฐœ๋ฐœ์„ ์œ„ํ•œ ๊ฐœ๋ฐœ๊ณ„ํš ์ˆ˜๋ฆฝ์— ๊ธฐ์ดˆ์ž๋ฃŒ๋กœ ์ด์šฉํ•  ์ˆ˜ ์žˆ์„ ๊ฒƒ์œผ๋กœ ์‚ฌ๋ฃŒ๋œ๋‹ค. ๋˜ํ•œ ํฌํ•ญ ์ฒœ๋ถ€๊ฐ€์Šค ๋ถ€์กด ์ง€์—ญ์˜ ๋ฌผ์„ฑ ์ •๋ณด๋ฅผ ์ถ”๊ฐ€ํ•œ ์ƒ์‚ฐ์„ฑ ๋ถ„์„์„ ํ†ตํ•ด ๊ฐœ๋ฐœ๊ณ„ํš ์ˆ˜๋ฆฝ ์‹œ ํ™œ์šฉ ๊ฐ€๋Šฅํ•  ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.์ œ 1 ์žฅ ์„œ ๋ก  1 ์ œ 2 ์žฅ ๊ฐ€์Šค์ „ ๊ฐœ๋ฐœ ์‹œ ๊ฐœ๋ฐœ๊ณ„ํš ์ˆ˜๋ฆฝ ๋ฐฉ๋ฒ• 4 2.1 ์›์‹œ๊ฐ€์Šค๋ถ€์กด๋Ÿ‰ ํ‰๊ฐ€ 4 2.2 ์ƒ์‚ฐ์ • ์œ„์น˜ 8 2.3 ์ƒ์‚ฐ์ • ๊ทœ๊ฒฉ ๋ฐ ์ƒ์‚ฐ ์œ ๋Ÿ‰ 11 2.3.1 ์œ ์ •์‹œํ—˜ 11 2.3.2 ๋…ธ๋‹ฌ๋ถ„์„ 13 2.4 ๊ฒฝ์ œ์„ฑ ํ‰๊ฐ€ 17 ์ œ 3 ์žฅ ์œก์ƒ ์ฒœ๋ถ€๊ฐ€์Šค ๋ถ€์กด ์ง€์—ญ์— ๋Œ€ํ•œ ์ ์šฉ 19 3.1 ์—ฐ๊ตฌ๋Œ€์ƒ์ง€์—ญ 19 3.2 ์ฒœ๋ถ€๊ฐ€์Šค ์ €๋ฅ˜์ธต ๋ชจ๋ธ ๊ตฌ์ถ• 21 3.3 ์ƒ์‚ฐ์šด์˜์กฐ๊ฑด์— ๋”ฐ๋ฅธ ์ƒ์‚ฐ์„ฑ ๋ถ„์„ 23 3.3.1 ์›์‹œ๊ฐ€์Šค๋ถ€์กด๋Ÿ‰ ํ‰๊ฐ€ ๊ฒฐ๊ณผ 23 3.3.2 ์ €๋ฅ˜์ธต ๋ชจ๋ธ์˜ ์ƒ์‚ฐ์šด์˜์กฐ๊ฑด ์„ ์ • 25 3.3.3 ์ƒ์‚ฐ์„ฑ ๋ถ„์„ ๋ฐ ๋งค์žฅ๋Ÿ‰ ํ‰๊ฐ€ ๊ฒฐ๊ณผ 38 3.4 ์ƒ์‚ฐ์šด์˜์กฐ๊ฑด ๋ณ„ ๊ฒฝ์ œ์„ฑ ํ‰๊ฐ€ ๊ฒฐ๊ณผ 46 ์ œ 4 ์žฅ ์ฒœ๋ถ€๊ฐ€์Šค ์ €๋ฅ˜์ธต ํŠน์„ฑ์˜ ์˜ํ–ฅ ๋ถ„์„ 51 4.1 ์ƒ์‚ฐ์„ฑ์— ๋Œ€ํ•œ ์ €๋ฅ˜์ธต ๋ฌผ์„ฑ์˜ ์˜ํ–ฅ ๋ถ„์„ ๊ฒฐ๊ณผ 51 4.2 ๊ฐœ๋ฐœ๊ณ„ํš์— ๋”ฐ๋ฅธ MEFS ๋ถ„์„ ๊ฒฐ๊ณผ 54 ์ œ 5 ์žฅ ๊ฒฐ ๋ก  57 ์ฐธ๊ณ ๋ฌธํ—Œ 59Maste

    The First 100 Cases of Endoscopic Combined Intrarenal Surgery in Korea: Matched Cohort Analyses versus Shock-Wave Lithotripsy

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    Purpose: This study presents our initial experience with endoscopic combined intrarenal surgery (ECIRS) for large renal stones and compares the results of a propensity score-matched cohort of patients undergoing shock-wave lithotripsy (SWL). Materials and methods: A total of 100 adults underwent ECIRS for renal stones between August 2017 and January 2019. For comparison, 2172 patients who underwent a first session of SWL between January 2005 and May 2018 were included in the SWL cohort. Propensity score matching was performed using maximal stone length (MSL), mean stone density (MSD), and stone heterogeneity index (SHI) scores. Stone-free rate (SFR) and success rate were compared between ECIRS and SWL. Results: In the ECIRS group, the mean MSL, mean MSD, and mean SHI were 28.7ยฑ15.2 mm, 1013.9ยฑ360.0 Hounsfield units (HU), 209.4ยฑ104.0 HU, respectively. The SFR was 70%, and the success rate was 82.0% in this group. Although the ECIRS group had larger, harder, and more homogeneous stones than the SWL group, ECIRS showed a higher SFR and success rate than SWL. After propensity-score matching, SFR and success rate remained higher with ECIRS than with SWL (both, p<0.001). In multivariate logistic regression, smaller stone size [odds ratio (OR): 0.947, 95% confidence interval (CI): 0.913-0.979, p=0.002] and lower Seoul National University Renal Stone Complexity score (OR: 0.759, 95% CI: 0.610-0.935, p=0.011) were independent predictors of successful ECIRS. Conclusion: ECIRS showed a higher SFR and success rate than SWL for large renal stones. Smaller stone size and lower complexity of stones were associated with a higher likelihood of successful ECIRS.ope

    In Vivo Feasibility Test of a New Flexible Ureteroscopic Robotic System, easyUretero, for Renal Stone Retrieval in a Porcine Model

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    Purpose: Using a new robotic endoscopic platform system developed for retrograde intrarenal surgery (RIRS) called easyUretero (ROEN Surgical Inc.), we evaluated the feasibility and safety of renal stone retrieval in a porcine model. Materials and methods: Six female pigs were used for our in vivo study. First, 0.3-cm-sized phantom stones were inserted into the kidneys of each pig via the ureteral access sheath. Next, renal stone retrieval was attempted using manual RIRS in three pigs and robotic RIRS in three pigs. Three surgeons performed extraction of 10 stones in each session. Results: The mean stone retrieval time by manual RIRS was significantly shorter than that by robotic RIRS (399.9ยฑ185.4 sec vs. 1127.6ยฑ374.5 sec, p=0.001). In contrast, the questionnaire regarding usability showed high satisfaction in the surgeons' fatigue category for surgeons using robotic RIRS. The radiation exposure dose was also lower in robotic RIRS than in manual RIRS (0.14 ยตSv vs. 45.5 ยตSv). Postoperative ureteral injury assessment revealed Grade 0 in manual RIRS cases and Grades 0, 1, and 2 in robotic RIRS cases. Conclusion: The easyUretero system is a new robotic RIRS system that was developed in Korea. The results of the present study suggest that using easyUretero for stone retrieval during RIRS is safe and ergonomic.ope

    Effects of intravesical BCG maintenance therapy duration on recurrence rate in high-risk non-muscle invasive bladder cancer (NMIBC): Systematic review and network meta-analysis according to EAU COVID-19 recommendations

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    Purpose: During the coronavirus disease 2019 (COVID-19) pandemic, the European Association of Urology (EAU) recommended that courses of intravesical bacillus Calmette-Guรฉrin (BCG) therapy lasting more than 1 year could be safely terminated for patients with high-risk non-muscle-invasive bladder cancer (NMIBC). Thus, we conducted a systematic review and network meta-analysis according to EAU's COVID-19 recommendations. Materials and methods: A systematic review was performed following the Preferred Reporting Items for Systematic Review and Meta-Analysis guidelines. We conducted a network meta-analysis of recurrence rate in patients with NMIBC receiving induction therapy (M0) and those receiving maintenance therapy lasting 1 year (M1) and more than 1 year (M2). Results: Nineteen studies of 3,957 patients were included for the network meta-analysis. In a node-split forest plot using Bayesian Markov Chain Monte Carlo (MCMC) modeling, there were no differences between the M1 and M2 groups in recurrence rate [odds ratio (OR) 0.95 (0.73-1.2)]. However, recurrence rate in the M0 group was higher than that in the M1 [OR 1.9 (1.5-2.5)] and M2 [OR 2.0 (1.7-2.4)] groups. P-score tests using frequentist inference to rank the treatments in the network demonstrated that the therapy used in the M2 group (P-score 0.8701) was superior to that used in the M1 (P-score 0.6299) and M0 groups (P-score 0). In rank-probability tests using MCMC modeling, the M2 group showed the highest rank, followed by the M1 and M0 groups. Conclusion: In the network meta-analysis, there were no differences between those receiving BCG maintenance therapies in terms of recurrence rate. In the rank tests, therapy lasting more than 1-year appears to be most effective. During the COVID-19 pandemic, 1-year maintenance therapy can be used, but after the COVID-19 pandemic, therapy lasting more than 1-year could be beneficial.ope

    Silodosin versus Tamsulosin for Medical Expulsive Therapy of Ureteral Stones: An Updated Systematic Review and Meta-Analysis of Randomized Controlled Trials

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    Background and Objectives: This systematic review and meta-analysis of randomized controlled trials was performed to compare the therapeutic effects and safety profiles of silodosin and tamsulosin for medical expulsive therapy (MET) of ureteral stones. Materials and Methods: We searched PubMed, EMBASE, the Cochrane Library, and Web of Science to identify articles published before July 2022 that described randomized controlled trials comparing silodosin and tamsulosin for MET of ureteral stones. Endpoints were stone expulsion rate, stone expulsion time, and total complication rate. Results: In total, 14 studies were included in our analysis. The size of ureteral stones was &lt;1 cm. Compared with tamsulosin, silodosin resulted in a significantly higher stone expulsion rate (p &lt; 0.01, odds ratio (OR) = 2.42, 95% confidence interval (CI) = 1.91 to 3.06, I2 = 0%) and significantly shorter stone expulsion time (p &lt; 0.01, mean difference = -3.04, 95% CI = -4.46 to -1.63, I2 = 89%). The total complication rate did not significantly differ between silodosin and tamsulosin (p = 0.33, OR = 1.15, 95% CI = 0.87 to 1.52, I2 = 7%). Conclusions: Compared with tamsulosin, silodosin resulted in significantly better expulsion of ureteral stones &lt;1 cm. The total complication rate did not significantly differ between silodosin and tamsulosin. Thus, silodosin may be superior to tamsulosin for MET of ureter stones &lt;1 cm.ope

    A New Parameter for Calcium Oxalate Stones: Impact of Linear Calculus Density on Non-Contrast Computed Tomography

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    Background and Objectives: Non-contrast computed tomography (NCCT) is widely used to evaluate urolithiasis. The NCCT attenuation, measured in Hounsfield units (HU), has been evaluated to predict stone characteristics. We propose a novel parameter, linear calculus density (LCD), and analyze variables from NCCT imaging to predict calcium oxalate (CaOx) stones, which are common and challenging to fragment. Materials and Methods: We retrospectively reviewed the medical records of patients with urolithiasis between 2014 and 2017. Among those, 790 patients were included. Based on the NCCT pre-treatment, the maximal stone length (MSL), mean stone density (MSD), and stone heterogeneity index (SHI) were obtained. In addition, the variation coefficient of stone density (VCSD = SHI/MSD ร— 100) and linear calculus density (LCD = VCSD/MSL) were calculated. In accordance with the stone analysis, the patients were divided into two groups (CaOx and non-CaOx groups). The logistic regression model and receiver operating characteristic (ROC) curve were used for predictive modeling. Results: In the CaOx group, the SHI, VCSD, and LCD were more significant than in the non-CaOx group (all p < 0.001). SHI (OR 1.002, 95% CI 1.001-1.004, p < 0.001), VCSD (OR 1.028, 95% CI 1.016-1.041, p < 0.001), and LCD (OR 1.352, 95% CI 1.270-1.444, p < 0.001) were significant independent factors for CaOx stones in the logistic regression models. The areas under the ROC curve for predicting CaOx stones were 0.586 for SHI, 0.66 for VCSD, and 0.739 for LCD, with a cut-point of 2.25. Conclusions: LCD can be a useful new parameter to provide additional information to help discriminate CaOx stones before treatment.ope

    Feasibility of Laser Lithotripsy for Midsize Stones Using Robotic Retrograde Intrarenal Surgery System easyUretero in a Porcine Model

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    Purpose: To test the safety and feasibility of laser lithotripsy for midsize renal stones using a newly developed robotic retrograde intrarenal surgery (RIRS) system (easyUretero) in a porcine model. Materials and Methods: Three urologic surgeons representing three different RIRS experience levels (beginner, intermediate, and expert) participated. Four female pigs (aged 6 months) underwent manual or robotic RIRS. Under general anesthesia, a nephrostomy tract was created ventrally, and calcium stones (diameter, 1.0-1.5 cm) were inserted at renal calices. For manual RIRS, surgeons operated a flexible ureteroscope. For robotic RIRS, the ureteroscope was attached to the robotic slave device. The Auriga XLโ„ข Holmium laser was used for lithotripsy. Lasering and stone retrieval time were measured. Kidneys and ureters were inspected for injury at the end of each session. Results: For the expert, both lasering and stone retrieval by manual RIRS were quicker than by robotic RIRS (22.8 ยฑ 11.0 s/stone vs 234.5 ยฑ 102.5 s/stone, p = 0.02; 41.5 ยฑ 0.5 s/stone vs 79.3 ยฑ 8.1 s/stone, p = 0.02). For the intermediate and beginner, lasering and stone retrieval times were not significantly different between manual and robotic procedures (127.8 ยฑ 93.2 s/stone vs 284.8 ยฑ 112.3 s/stone, p = 0.08; 86.0 ยฑ 30.5 s/stone vs 84.1 ยฑ 21.4 s/stone, p = 0.92). All stones were removed. Grade 1 ureteral and renal injuries occurred in both manual RIRS and robotic RIRS. Conclusions: The laser lithotripsy using the easyUretero robotic system is safe and feasible in a porcine model, even for less-experienced surgeons.restrictio
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