Publications

The Kutei basin is ones of large six coal basins which have Coal Bed Methane (CBM) potential resources distributed in many area of East Kalimantan and estimated totally about 50 TCF. Based on previous study of coal surface mapping and characteristics, the Bentian Besar and Siluq Ngurai District is ones having CBM potential area. To Asses more detail the potential resources of CBM, the subsurface geological and geophysical study is required. The identification, mapping distribution and potential assessment of CBM potential in this study area rely upon the availability of data set (seismic and well data). Since the availability of data set is very limited i.e. three wells and 2D seismic data, which is not laid out in the study area, the distribution map of the CBM is hard to be produced. The work that can be carried out is sweet spot identification. In the M well, eleven coal seams can be recognized using the electric log characters, especially gamma ray, resistivity and density log. Coal layer is indicated by low density value and high resistivity. The coal seams can be identified at depth ranging from 400 m up to 1100 m. In the shallow depth less than 500 m, it could be identified 5 coal seams (coal A - E) with varying thickness. Coal A, B, D and E has thickness around 2 -3 m, while the coal C is thicker than the others (ca. 8 m) at the depth of 465m. Based on the identified coal seam along the depth of M well, the gas in place (GIP) potential of the whole seam is estimated around 5.6 TCF.