Pdf shale gas potential of north cambay basin, gujarat. The state was bounded in the north by the kaira district and in the south by the gulf of cambay cambay was the only state in the kaira agency of the gujarat division of the bombay presidency, which merged into the baroda and gujarat states agency in 1937. The end of cambay shale deposition is again marked by the development of a widespread unconformity that is present throughout the basin. Subsurface understanding of an oil field in cambay basin 2. In the attempt to study the buried deccan trap layers in the cambay basin, the ground magnetic surveys have not been very useful as the data combine the effect due to the crystalline basement and the trap thickness. Cambay basin in gujarat holds 206 bcf gas in one zone. The basin is divided into five tectonic blocks separated by major cross trends. Application of nuclear magnetic resonance logs for. Study of the deccan traps of cambay basin by geophysical methods. The study area falls in the sanchorpatan tectonic block in the northern part of cambay basin. The cambay rift basin, a rich petroleum province of india, is a narrow, elongated rift graben, extending from surat in the south to sanchor in the north. Production and well operations production chemistry, metallurgy and biology corrosion inhibition and management including h2s and co2 1. Aerially, this is the lasrgest block in the basin, extending from dholka. Gulf of cambay south part 1896 the gulf of khambhat, also known as the gulf of cambay, is a bay on the arabian sea coast of india, bordering the state of gujarat.
Subsequently, sr6 and sr5 in the central cambay and sr6, sr5, and sr4 in the south charged the reservoirs in their respective drainage areas. Bombay geologic province eocene to miocene composite total. The cambay basin is a tertiary intracratonic graben in the western onshore part of india. Hydrocarbon prospectivity of deccan trap in northern. Cambay basin, india from refraction and wideangle reflection data. Bpcl, invites ebids from eligible bidders for hiring of. The cambay basin in the nw part of the indian peninsula is a commercial petroleum producer from tertiary sediments resting on the basic lava flows known as deccan traps. From north to south, the blocks are these sediments are characterised by an assortment of illsorted, high energy trap derived materials. Depositional processes and sequence stratigraphic framework of.
A case for revisiting the evolutionary history of pericratonic cambay basin, india. Cambay basin is an intracratonic rift graben located in the state of gujarat, india. The cambay basin is divided into five tectonic blocks based on transverse fault systems, namely narmadatapti, jambusarbroach in the south of the cambay basin and tarapurcambay, ahmedabadmehsana as well as sanchorpatan in the north of the cambay basin biswas 1982, 1987. After a brief description of the cambay basins geology, the other aspects of exploration were. Aug 03, 2019 in the southern cambay basin, it was sourced from a higher plant fraction deposited in marine or fluvial deltaic environment sivan et al. The subject well is a recently drilled and completed in cambay field offshore in west coast of india. In some parts of the basin, some reflections in the seismograms obtained in the course of seismic surveys, could be correlated to the trap surface. The effective source rocks in the north cambay basin, india. Ril holds 100% participating interest pi in this block which is located at a distance of about kms from ahmedabad in gujarat, india, in the cambay basin. Origin of high fluoride in groundwater in the north gujarat. The gas and oil in shale are held as free hydrocarbons within natural fractures, pore spaces and some gas are stored. Tender for hiring of slickline services for the block cbonn20108 cambay basin, gujarat, india tender no. Apr 29, 2020 geology of cambay basin pdf the cambay rift basin, a rich petroleum province of india, is a narrow, throughout the geological history, except during early syn rift stage, the.
The state was bounded in the north by the kaira district and in the south by the gulf of cambay. In the north, the basin narrows, but tectonically continues beyond sanchor to pass into the barmer basin of rajasthan. A pericratonic basin, it is characterized by extensive carbonateplatform shelf development during middle eocene to middle miocene time. This region is severely affected by endemic fluorosis due to ingestion of groundwater containing excessive fluoride. After landing the completion, two mechanical plugs were installed to nipple down bop and nipple up xmas tree.
Geology of cambay basin pdf the cambay rift basin, a rich petroleum province of india, is a narrow, throughout the geological history, except during early syn rift stage, the. North cambay basin and south cambay basin being separated by the mahi river mayor, s. The present work is an exploration study of shales of different. Understanding reservoir architecture of cambay shale india has strategic compulsion to explore and develop shale gas due to rising energy.
The total volume of seismic reflection data acquired from the cambay basin is of the order of lkm 2d and sq. Deep gas exploration in cambay basin, india semantic scholar. Identification of hydrocarbon microseepage using trace metal. The cenozoic sedimentary fill in cambay basin is represented by two 1st order depositional sequences. The ankleshwar oil field lies in the western part of the cambay basin. The study area falls in the northern part of the ankleswar oil field, which is an important part of the narmadatapti block of south cambay basin dhar and bhattacharya, 1993. Origin of high fluoride in groundwater in the north gujaratcambay region, india.
This paper reports on the origin of high fluoride in a regional alluvial aquifer system under water stress in the north gujarat cambay ngc region in western india. The end of this sequence is marked by a regressive phase leading to deposition of claystone, sandstone, and shale alternations and a limestone unit of the dadhar formation. Strategies for improvement of hydrocarbon production in cambay basin study of cambay basin introduction the cambay basin is located in gujarat state, on the western margin of india. The cambay basin, a rift sag tertiary basin, in the western onshore part of india includes mehsana, ahmedabad, tarapur, broach, and narmada blocks, separated by faults aligned transverse to the general northsouth axis of the rift. Apr 20, 2019 geology of cambay basin pdf the cambay rift basin, a rich petroleum province of india, is a narrow, throughout the geological history, except during early syn rift stage, the. Cretaceous sediments which underlie the deccan traps are exposed in the eastern and western margins of the basin and are also encountered in the subsurface.
Prefeasibility report for exploratory drilling operation. Massive eruption of lava flowed covering almost the whole of the cambay basin forms the tectonic. In addition to the cambay field, oilex has interests including the exploration permits wa388p, northwest shelf, offshore australia that has large gas potential and jpda 06103 in the timor sea. The basin, located in the western states of india, has been actively explored since 1960 with production started in 1961 by ongc.
Major lineaments in this block trend in the nnw sse direction. The key fields in the cambay basin are ankleshwar, kalol, sobhasan and gandhar. Benefits by integrating core, image and nmr data for shale. The current study deals with the cambay basin where silty sand reservoir has been identified as hydrocarbon bearing. Mar 23, 2020 in the southern cambay basin, it was sourced from a higher plant fraction deposited in marine or fluvial deltaic environment sivan et al.
An attempt has been made to determine shalegas prospectivity of cambay shale integrating wireline log, mud log, cutting and core data. The cambay rift basin, a rich petroleum province of india, is a narrow, throughout the geological history, except during early syn rift stage, the north. The kadi and kalol formations of early to middle eocene age are thick clastic wedges in the northern part of the cambay basin, india. Deccan trap, cambay basin introduction the study area is situated on the northeastern rising flank of cambay basin fig. This paper reports on the origin of high fluoride in a regional alluvial aquifer system under water stress in the north gujaratcambay ngc region in western india. Asia india gulf of cambay cambay basin hazira field 0. Early eocene equatorial vegetation and depositional.
In general, areas of high fluoride overlap areas with high. Tectonosedimentary evolution of northern part of cambay. Mapping of iodine, lithium and strontium in oilfield water. Cambay basin is covering an area of about 59000 sq km, 425 km long and width 8 km in the central part approximately. Origin of high fluoride in groundwater in the north. In the southern cambay basin, it was sourced from a higher plant fraction deposited in marine or fluvial deltaic environment sivan et al. Coventional and basincentered accumulations in the strata between sr7 and sr89 that contain free hydrocarbobs under pressure are likely. Stratigraphic analysis of kadi and kalol formations, cambay basin, india authors. An approach has been made to evaluate the shale gas potential of cambay shale formation of cambay basin. The indrora field is located mehsana ahmedabad block north cambay basin.
The cambay basin in india is a half graben containing more than seven kilometers of cenozoic sedimentary rocks. Stratigraphic analysis of kadi and kalol formations, cambay basin, india. In context of the geological setting of the basin in general and with special reference to the cambay shale, there is the likely presence of excellent reservoir character like pores, fractures and a significant amount of kerogens. Identification of hydrocarbon microseepage using trace. In the north, the basin extends into rajasthan and in south and south west into continental shelf of arabian sea through the gulf of cambay. Generalized stratigraphy of cambay basin negi et al. After a brief description of the cambay basin s geology, the other aspects of exploration were. Pdf the effective source rocks in the cambay basin, india. The cambay rift basin, a rich petroleum province of india, is a narrow, elongated rift graben, extending. Aug 20, 2019 in the southern cambay basin, it was sourced from a higher plant fraction deposited in marine or fluvial deltaic environment sivan et al. Pdf outcrop study in south cambay basin, india researchgate. Gas strike in shale reservoir in dholka field in cambay basin. Subsurface understanding of an oil field in cambay basin.
The block falls in the northern part of the ahmedabadmehsana tectonic block, having a number oil and gas fields, of which the prominent ones are kalol, jotana, sobhasan, becharaji and balol. Conventional and basincentered accumulations in the strata between sr7 and sr89 that contain free hydrocarbons under pressure are likely. Study of the deccan traps of cambay basin by geophysical. With an objective to understand factors controlling high fluoride concentration in groundwater of this region. The study area covers part of the southwestern ahmedabad. About gujarat and the indian gas market the cambay field is located in the heart of gujarats industrial corridor. Mineralogical and morphological characterization of older.
Apr 19, 2020 geology of cambay basin pdf the cambay rift basin, a rich petroleum province of india, is a narrow, throughout the geological history, except during early syn rift stage, the. Basin information directorate general of hydrocarbons dgh. Mapping of iodine, lithium and strontium in oilfield water of. Gas shale potential of cambay formation, cambay basin, india.
In the following period, relative subsidence of the basin continued leading to the accumulation of the younger cambay shale. Cambay basin cambay basin is situated in the state of gujarat which is in western part of india. Reservoir characterization of cambay shale cambay basin, india in reference to shale gas exploration and exploitation. The town of khambat cambay in presentday gujarat was its capital. In context of the geological setting of the basin in general and with special reference to cambay shale. The petroleum system in this part of the basin consists of cambay shale acting as source rocks, sands within kalol and kadi formations constituting the reservoir rocks and tarapur formation. Twodimensional velocity model of the crust beneath the south. The first, 1st order paleocene rift sequence relates to. In the northern part of cambay basin, the lower and upper part shaly units distinguish. The thickness of the cambay shale varies widely from 50 to 70m over structural highs like mehsana horst, ankaleswar high and 500 2000m in hazira, broach, tankari, tarapur and patan depressions fig. Indian petroleum publishers, 2004 petroleum 171 pages. The block cbonn20105 lies in the ahmedabadmehsana tectonic block of the cambay basin. It covers an area of about 53 500 km2 inclusive of about 2 500 km2 below gulf of cambay. Bombay geologic province eocene to miocene composite.
Gas shale potential of cambay formation, cambay basin. Cambay, kambay or khambhat, was a princely state during the british raj. The cambay basin of western india has been proved as the most prominent and promising basin for major shale oil and gas discoveries. Ahmedabadmehsana tectonic block this block lies between the khari river in the north and the vatrak river in the south.
Jan 23, 2019 in the southern cambay basin, it was sourced from a higher plant fraction deposited in marine or fluvial deltaic environment sivan et al. May 05, 2019 geology of cambay basin pdf the cambay rift basin, a rich petroleum province of india, is a narrow, throughout the geological history, except during early syn rift stage, the. Pdf it is widely known that the world consumes two barrels of oil for every barrel discovered. Geographic location of the basin the cambay rift basin, a rich petroleum province of india, is a narrow, elongated rift graben, extending from surat in the south to sanchor in the north. The eocenemiocene bombay shelf au is an oilprone assessment unit located offshore along the west coast of india. It lies between the west and northwestern margin of indian shield between latitudes 21n and 25n and longitudes 7115e and 7330e in the states of gujarat and rajasthan.
The late paleocenemid eocene cambay shale, spread throughout basin, has been the main source rock for cambayhazad. The effective source rocks in the cambay basin, india article pdf available in aapg bulletin 863 march 2002 with 2,954 reads how we measure reads. Division of essar oil limited to cambay basin, a proven. It is based on the subsurface study of on oil field in cambay basin. The basin lies predominantly onshore, with only the southwestern corner offshore in the gulf of cambay. Jun 11, 2019 the key fields in the cambay basin are ankleshwar, kalol, sobhasan and gandhar. Ahmadabad ahmadabadmehsana block aligned anklesvar field anklesvar formation api gravity banerjee and rao basalts basement broachjambusar block cambay shale cambay tarapur block chandra and chowdhary chowdhary 1969 clastics claystone coal coarse clastic cretaceous crude oil dadhar formation deccan trap deccan trap basalts deposition enewsw. Shale oil exploration from paleoceneearly eocene sequence in. Pdf shale gas potential of north cambay basin, gujarat, india.
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