ROCK PHYSICS MODELING FOR ORGANIC MATTER EFFECT IN CORRIDOR BLOCK, SOUTH SUMATERA BASIN
<p align="justify">Corridor block is located in South Sumatera Basin, this area has Multiple reservoir like basement fracture and sand reservoir, the source rock in this play predicted lies in Lemat formation and younger formation. Geochemical analysis shows that shale in this area h...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/30895 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | <p align="justify">Corridor block is located in South Sumatera Basin, this area has Multiple reservoir like basement fracture and sand reservoir, the source rock in this play predicted lies in Lemat formation and younger formation. Geochemical analysis shows that shale in this area has a lot organic matter with high level of maturity. For that reason, rock physics modeling is used to determine the effect of organic matter in geomechanical and elastic properties in Corridor Block. Since TOC data are limited, organic matter estimation technique like Passey, Optimal Superposition and Carbolog are used to determine TOC value along wellbore based on sonic and resistivity logs. Rock physics modeling is carried out from Sun and Liu (2014) schematic by adding the pore shape of inclusion and kerogen subtitution as Solid material, the pore shape of inclusion is estimated from pore space stiffness using Single and Multiple Aspect Ratio schematic based on Zimmerman equation and calculate it into inclusion concept from Kuster Toksoz. Organic matter estimation shows that Carbolog estimation technique has high correlation and hasn’t overestimated value, while the pore space stiffness modeling results show that the Multiple Aspect Ratio scheme provides better correlation than the Single aspect ratio. In other way rock physics modeling result shows every increase volume of organic matter 0.01 will reduce value of density 1.76%, Vp 0.39%, Vs 1,17% and young’s modulus 3,09%, while poisson’s ratio value increase 1,59%, and from geomechanical properties shows that increasing organic matter the value of brittleness index will decrease. In volume TOC modeling, its show that conventional data sensitive for TOC analysis when the average volume TOC is 0.09 (± 18 Wt%).<p align="justify"> |
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