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| 1 | Estimation of petrophysical parameters using seismic inversion and neural network modeling in Upper Assam basin, India显示文摘Estimation of petrophysical parameters is an important issue of any reservoirs. Porosity, volume of shale and water saturation has been evaluated for reservoirs of Upper Assam basin, located in northeastern India from well log and seismic data. Absolute acoustic impedance(AAI) and relative acoustic impedance(RAI) are generated from model based inversion of 2-D post-stack seismic data. The top of geological formation, sand reservoirs, shale layers and discontinuities at faults are detected in RAI section under the study area. Tipam Sandstone(TS) and Barail Arenaceous Sandstone(BAS) are the main reservoirs,delineated from the logs of available wells and RAI section. Porosity section is obtained using porosity wavelet and porosity reflectivity from post-stack seismic data. Two multilayered feed forward neural network(MLFN) models are created with inputs: AAI, porosity, density and shear impedance and outputs: volume of shale and water saturation with single hidden layer. The estimated average porosity in TS and BAS reservoir varies from 30% to 36% and 18% to 30% respectively. The volume of shale and water saturation ranges from 10% to 30% and 20% to 60% in TS reservoir and 28% to 30% and 23% to 55% in BAS reservoir respectively. | Triveni Gogoi Rima Chatterjee | 2019 | Geoscience Frontiers2019，10，3： | 1 |
| 2 | Estimation of stress magnitude and physical properties for coal seam of Rangamati area, Raniganj coalfield, India显示文摘 | Rima Chatterjee P.K. Pal | 2009 | International Journal of Coal Geology2009，，1： | 1 |
| 3 | Groundwater quality assessment of Dhanbad district, Jharkhand, India显示文摘 | Rima Chatterjee Gourab Tarafder Suman Paul | 2010 | Bulletin of Engineering Geology and the Environment2010，，1： | 1 |
| 4 | Determination of in-situ stress direction from cleat orientation mapping for coal bed methane exploration in south-eastern part of Jharia coalfield, India显示文摘 | Suman Paul Rima Chatterjee | 2011 | International Journal of Coal Geology2011，，2： | 1 |
| 5 | Determination of in-situ stress direction from cleat orientation mapping for coal bed methane exploration in south-eastern part of Jharia coalfield, India显示文摘 | Suman Paul Rima Chatterjee | 2011 | International Journal of Coal Geology2011，87，： | 1 |
| 6 | 利用叠前地震数据估算印度KG盆地含水合物沉积物的孔隙度显示文摘利用叠后地震数据估算孔隙度有几个经典的统计方法可用,本文研究是直接利用叠前地震数据估算孔隙度。我们估算孔隙度反射率而不是将得到的声阻抗转化为孔隙度。我们将这一方法应用于KG盆地的二维地震数据,通过角度道集叠加同时反演直接获得孔隙度。在1 059~1 224 m深度区间内,根据密度测井估算的总孔隙度变化范围为49%-85%。这一值将用作含水合物沉积物的二维叠前地震数据孔隙度反演的输入。孔隙度成像结果表明存在两个明显的含水合物带,并与基于裂缝充填型气体水合物的解释结果非常吻合。在二维多道地震剖面的1 450-1 615 ms时间段,含水合物沉积物和BSR之下未固结沉积物的孔隙度在50%-70%之间变化,含水的砂/粘土沉积物的孔隙度值大约是60%-70%。本文研究表明,在利用地震数据直接计算孔隙度时,我们所提出的方法计算速度快、可靠性高。 | Rima Chatterjee Dip Kumar Singha Maheswar Ojha 徐华宁(译) 万玲(校对) 范广慧(校对) | 2018 | 海洋地质2018，0，2： | 0 |
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