QIAN Jin, WANG Xiu-Juan, DONG Dong-Dong, WU Shi-Guo, SAIN Kalachand, YE Yue-Ming
{"title":"基于叠前地震资料和岩石物理的天然气水合物稳定带游离气定量评价——以印度krishna-godavari盆地nghp01-10a井为例","authors":"QIAN Jin, WANG Xiu-Juan, DONG Dong-Dong, WU Shi-Guo, SAIN Kalachand, YE Yue-Ming","doi":"10.1002/cjg2.20238","DOIUrl":null,"url":null,"abstract":"<p>The distribution, saturation, and hydrate indicator of free gas beneath gas hydrate stability zone have been the difficulty in the research of gas hydrate. Amplitude versus offset (AVO) and rock physics can be used to quantitatively interpret free gas saturation. In this paper, seismic data, acquired at K-G basin, India, are processed to preserve true amplitude information. Based on the logging data and horizon calibration, free gas saturation of NGHP01-10A is assessed with effective medium theory and AVO modeling. It is found that free gas saturation is related to its distribution patterns. Assessments of free gas saturation in homogeneous and patchy distribution are 0.3%∼0.4% and 3%∼4%, respectively. The results show good agreement with the crossplot of Poisson's ratio which are calculated from the measurement at NGHP01-10D. Free gas is further deduced to be homogeneous distribution on the base of dry frame Poisson's ratio with the saturation of 0.3%∼0.4%.</p>","PeriodicalId":100242,"journal":{"name":"Chinese Journal of Geophysics","volume":"59 4","pages":"330-340"},"PeriodicalIF":0.0000,"publicationDate":"2016-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/cjg2.20238","citationCount":"2","resultStr":"{\"title\":\"QUANTITATIVE ASSESSMENT OF FREE GAS BENEATH GAS HYDRATE STABILITY ZONE FROM PRESTACK SEISMIC DATA AND ROCK PHYSICS: A CASE OF HOLE NGHP01-10A, KRISHNA-GODAVARI BASIN, INDIA\",\"authors\":\"QIAN Jin, WANG Xiu-Juan, DONG Dong-Dong, WU Shi-Guo, SAIN Kalachand, YE Yue-Ming\",\"doi\":\"10.1002/cjg2.20238\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The distribution, saturation, and hydrate indicator of free gas beneath gas hydrate stability zone have been the difficulty in the research of gas hydrate. Amplitude versus offset (AVO) and rock physics can be used to quantitatively interpret free gas saturation. In this paper, seismic data, acquired at K-G basin, India, are processed to preserve true amplitude information. Based on the logging data and horizon calibration, free gas saturation of NGHP01-10A is assessed with effective medium theory and AVO modeling. It is found that free gas saturation is related to its distribution patterns. Assessments of free gas saturation in homogeneous and patchy distribution are 0.3%∼0.4% and 3%∼4%, respectively. The results show good agreement with the crossplot of Poisson's ratio which are calculated from the measurement at NGHP01-10D. Free gas is further deduced to be homogeneous distribution on the base of dry frame Poisson's ratio with the saturation of 0.3%∼0.4%.</p>\",\"PeriodicalId\":100242,\"journal\":{\"name\":\"Chinese Journal of Geophysics\",\"volume\":\"59 4\",\"pages\":\"330-340\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2016-10-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1002/cjg2.20238\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Chinese Journal of Geophysics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/cjg2.20238\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chinese Journal of Geophysics","FirstCategoryId":"1085","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/cjg2.20238","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
QUANTITATIVE ASSESSMENT OF FREE GAS BENEATH GAS HYDRATE STABILITY ZONE FROM PRESTACK SEISMIC DATA AND ROCK PHYSICS: A CASE OF HOLE NGHP01-10A, KRISHNA-GODAVARI BASIN, INDIA
The distribution, saturation, and hydrate indicator of free gas beneath gas hydrate stability zone have been the difficulty in the research of gas hydrate. Amplitude versus offset (AVO) and rock physics can be used to quantitatively interpret free gas saturation. In this paper, seismic data, acquired at K-G basin, India, are processed to preserve true amplitude information. Based on the logging data and horizon calibration, free gas saturation of NGHP01-10A is assessed with effective medium theory and AVO modeling. It is found that free gas saturation is related to its distribution patterns. Assessments of free gas saturation in homogeneous and patchy distribution are 0.3%∼0.4% and 3%∼4%, respectively. The results show good agreement with the crossplot of Poisson's ratio which are calculated from the measurement at NGHP01-10D. Free gas is further deduced to be homogeneous distribution on the base of dry frame Poisson's ratio with the saturation of 0.3%∼0.4%.
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