User:Moolaram Darji/sandbox

Prospect evolution Of Mesozoic formation in Barmer Basin Block RJ-ON-90-1 located at 25° 45' N, 71° 25' E in barmer,rajasthan is a geological sub-basin and it was formed by rifting which had main phase of extension from late Cretaceous epoch (Maastrichtian) to mid-Eocene epoch (Lutetian). Basement of barmer sub-basin is Malani ignius suits which is belong to neoproterozoic era (-750 ma ago )as it is dated by Ar-Ar of rhyodacites rock (by Meert et al., 2013; Davis et al., 2014) and it is covered by marwar supergroup(-650ma) .there is unconformity of 100ma in between marwar super group and malani ignius suitsz Outcrop of Jurasic lathi formation is recognised at Fatehgarh Ridge and it is also found in seismic imaging. this formation includes porous sandstones with significant reservoir quality. Sarnoo and Karentia (eastern margin of barmer basin ) contain outcrop of ghaggar-hakra formation of cretaceous period have dominantly fluvial system, As Preliminary studies have identified at least three channel-dominated successions interbedded with significant thicknesses of parallel-laminated siltstones and fine-grained sandstones. texture and architecture of the facies is control by competence, capacity, sediment supply and climate. the textural aspects of the channel fill suggest a more mature system. The dominantly fine-grained and parallel-laminated successions preserved between the channel-dominated strata may well represent overbank development. architecture of barmer basin is quit complex as it has northeast-southwest Paleocene extension in the Barmer Hills, and northwest-southeast extension in the Sarnoo Hills(Andrew J. Bladon). It has been explained by conventional model of Morley et al., 1990; Gawthorpe and Hurst, 1993; Faulds and Varga, 1998 cairn india drilled a well into Mesozoic sediment upto 1km, Good gas have been encountered during drilling but the reservoirs have very low porosity and are cemented with hematite. Since the gas reserved Mesozoic formation in barmer basin is not yet properly answered and to answer it we have design a multi-disciplinary approach, which will include Geological prospect: (1) Paleo-Tectonic Reconstruction models (2)Meso-paleozoic Outcrops (3) Environmental study Petrophysic prospect: (1) gravity survey- (2) Well logs – sp log, resistive log ,neutron-density (3)magnetic survey (aeromagnetic survey) Seismic prospect: design low frequency signal source Sequence of efforts which required to explore basin (1) Out crop study in southern part of basin in tharad ridge (2) Fault, slip, slickness and fracture study to analyse rifting in basin evolution (3) Micro level plate movement study to analyse paleozoic and Mesozoic condition (4)if project indicate certain area where meso-paleozoic oil can be, then well should be drill in that area through deccan trap at deeper depth (we would like to suggest area beneath the deccan trap because it would have higher probability of good porosity -permeable gas reservoir) (5) Design reservoir geometry using well data