Subsurface understanding of an oil field in cambay basin 2. Though there is a geological risk of not finding gas in the resource plays, a detailed study of the shale samples will prove to be beneficial for better understanding of the cambay shale with reference to shale gas. Abstract cambay is matured petroliferous basin in the western part of india. Current scenario and future prospects of shale gas in. Bombay province cambay basin the cambay basin began as a failed rift in the late cretaceous during which time. Geochemical evaluation of part of the cambay basin, india. Regional tectonic framework, structure and evolution of. The gulf of khambhat is about 200 km 120 mi long, about 20 km 12 mi wide in the north and up to 70 km 43 mi wide in the south. One of the biggest oil fields discovered in gujarats cambay.
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. Further, usgs has indicated that these basins have also potential for shale oil. Depositional environment prediction of ingoli field of. The discovery of oil and gas in the barmer basin in northwest india was one of the more significant global discoveries in the decade 20012010. The goal of the study is to analyse the physical properties of two core samples from cambay basin, gujarat phase composition, crystallographic preferred orientation, crystal.
The deccan trap, composed of horizontal lava flows, forms the basement of the cambay basin. Petrographic characteristics and paleoenvironmental history of. Cambay basin is bounded on its eastern and western sides by basinmargin faults and extends south into the offshore gulf of cambay, limiting its onshore area to 7,900 mi2. Geoelectric structure of northern cambay rift basin from. Formation evaluation of fractured basement, cambay basin, india article pdf available in journal of geophysics and engineering 92. The basin, around 425 km long with an average width of about 8 km, extends from luni river in the north to tapti.
These basins were formed by rifting along precambrian tectonic trends. The current study deals with the cambay basin where silty sand reservoir has been identified as hydrocarbon bearing. In offshore areas, these companies covered 2 fields in cauvery basin and 4 fields in krishnagodavari basin on the east coast and 3 fields in mumbai basin and 2 fields in cambay basin on the west coast. Cambay basin is an intracratonic rift graben located in the state of gujarat, india. 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. In parallel with the cambay psc, a field development plan in support of the application for an extension of the psc was submitted in september 2017 and approved by the government of india in april 2018. The samples were collected from three lignite fieldsvastan. The study area falls in the sanchorpatan tectonic block in the northern part of cambay basin. Evaluation of cambay shale cambay basin, india using geo. Further, usgs in april 2014 estimated technical recoverable volume of 62 million barrels of shale oil for cambay basin and more than 3.
December 2019 quarterly report company announcement. Gas shale potential of cambay formation, cambay basin, india. Aerially, this is the lasrgest block in the basin, extending from dholka. Basin information directorate general of hydrocarbons dgh. The cambay basin is a tertiary intracratonic graben in the western onshore part of india.
Cambay basin is a roughly nnwsse trending petroliferous graben situated in the northwestern margin of indian peninsula in the state of gujarat fig. In the north, the basin narrows, but tectonically continues beyond sanchor to pass into the barmer basin of rajasthan. The sedimentary basins of india, onland and shallow offshore, up to the 200m isobath, area is about 1. The basin covers an onshore area of about 20,000 m2. In the southern cambay basin, it was sourced from a higher plant fraction deposited in marine or fluvial deltaic environment sivan et al. Bombay offshore and cambay are two major oilproducing basins in the western margin. Pdf shale oil exploration from paleoceneearly eocene. 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. Gravity and magnetic methods for geological studies. The gulf of khambhat also known as the gulf of cambay 1 is an inlet of the arabian sea along the west coast of india, in the state of gujarat it is about kilometres 80 mi miles in length, and divides the kathiawar peninsula to the west from the eastern part of gujarat state. Scientific research outcome report reservoir characterization of cambay shale cambay basin, india in reference to shale gas exploration and exploitation. Drainage materials and installation forward company information nds leads the exterior drainage industry with superior quality, design and service. Reservoir characterization case study, cambay basin, india priyabrata chatterjee, anil malkani, abajyoti boruah, ikhilesh dwivedi and peter hansen summary the cbos2 block in the cambay basin is located offshore west india in the gulf of khambat figure 1.
Pdf the effective source rocks in the cambay basin, india. Lignite samples collected from vastan, rajpardi and tadkeshwar lignite mines of cambay basin gujarat were subjected to organic. Petrographic characteristics and paleoenvironmental. The cambay basin the cambay basin occupies an area of approximately 56,000 sq. Shale oil exploration from paleoceneearly eocene sequence in. The town of khambat cambay in presentday gujarat was its capital. The effective source rocks in the cambay basin, india article pdf available in aapg bulletin 863 march 2002 with 2,719 reads how we measure reads. Oil has not been found in kutch basin, which is mainly an onshore mesozoic basin. Apart from the bounding faults, numerous fault systems and fractures have been identified within the saurashtra horst sant 1999.
Major lineaments in this block trend in the nnw sse direction. Bombay geologic province eocene to miocene composite total. Raniganj east basin west bengal at 2 fields cbm in onshore areas. The key fields in the cambay basin are ankleshwar, kalol, sobhasan and gandhar. Oct 26, 2014 one of the biggest oil fields discovered in gujarats cambay basin. Pdf shale oil exploration from paleoceneearly eocene sequence in cambay rift basin, india find, read and cite all the research you need. The length of the tapi river in lower tapi basin is 129 km. Ahmedabadmehsana tectonic block this block lies between the khari river in the north and the vatrak river in the south. The state was bounded in the north by the kaira district and in the south by the gulf of cambay. Oct 31, 2019 oilex holds a 45% participating interest pi in the cambay field, with gspc holding the remaining 55% pi. Amazon river basin organization of american states. The general basinal axis is nnwsse, but swings are noticed across major lineaments faults. Appendix d gas chromatograms of the analysed cambay shale and.
Cambay basin in gujarat holds 206 bcf gas in one zone. The samples were collected from three lignite fields vastan. 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. Tectonosedimentary evolution of northern part of cambay. Introduction among the 76 priority geologic provinces identified for the world energy assessment project of. The primary aim is to understand the reservoir architecture of shale gas. Source potential and reservoir fabric of the cambay shale. Major rivers draining gujarat are the narmada, tapti.
The discovery of the barmer basin, rajasthan, india, and. 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. It is based on the subsurface study of on oil field in cambay basin. Upper part of cambay shale formation containing siltstone was also targeted whereas the lower part which dominantly consists of shale was never thought to be a reservoir. Shale oil and gas directorate general of hydrocarbons dgh. Light hydrocarbons geochemistry of surface sediment from petroliferous region of the mehsana block, north cambay basin. The basin is divided into five tectonic blocks separated by major cross trends. Brittleness modeling of cambay shale formation for shale. Pdf light hydrocarbons geochemistry of surface sediment. Onshore oil exploration drilling phase cambay basin cb. During 2019, gspc ran a sales process for a number of its projects in the cambay basin. After a brief description of the cambay basin s geology, the other aspects of exploration were. The discovery of hydrocarbon in few wells in cambay basin in early 2000 changed the paradigm of exploration strategy in cambay basin.
Study of cambay and krishnagodavari basin for shale oil. It is variously described as an intracratonic type basin mathur et al. Cambay basin, namely cbonn20052 by government of india under the production sharing contract psc for exploration of hydrocarbon. After a brief description of the cambay basin s geology, the other aspects of. Dholka is one of the complex oil field in cambay tarapur tectonic block wherein gas has been struck, for the first time, in shale reservoir of middle eocene. 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. The basin has traditionally been more oilprone than gasprone.
Subsurface understanding of an oil field in cambay basin. These basins are characterized by high geothermal gradients attributed to the shallowness of the mantle in this region. Tectonic setup, geological setting and basin evolution. The cambay basin can be divided into six tectonic blocks.
Gas strike in shale reservoir in dholka field in cambay basin. The lower tapi basin extends over an area of 2920 sq. An attempt has been made to determine shalegas prospectivity of cambay shale integrating wireline log, mud log, cutting and core data. Abstract the natural gamma ray spectrometry can be used effectively and efficiently to predict the depositional environment. Sedimentary basins of india total 26 sedimentary basins have been recognized and they are divided into four categories based on their degree of hydrocarbon prospectivity. The effective source rocks in the cambay basin, india. The cambay basin, situated in the northwestern part of indian craton, is a narrow elongated riftgraben which came in to existence as a result of rifting in the early paleocene. In the north, the basin narrows, but tectonically continues beyond sanchor to pass into the barmer basin. Early eocene equatorial vegetation and depositional. Bombay geologic province eocene to miocene composite total petroleum system, india by c. The tectonic evolution of cambay rift in the northwestern part of indian peninsula is closely related to the origin and evolution of indian plate biswas et al. Reservoir characterization case study, cambay basin, india. Integrated reservoir characterization of cambay shale for shale gas resource estimation in ankleswar area cambay basin gujarat india.
Nds offers a full range of products, including catch basins, grates, channel drains. It is bounded on its eastern and western sides by basin. 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. Regional tectonic framework, structure and evolution of the western marginal basins of india. In the present paper lignites from the cambay basin have been studied for their hydrocarbon potential. 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. In december 2008, mercator signed production sharing contracts with the government of india for exploration of petroleum in two blocks under the seventh new exploration licensing policy round nelpvii. Shale oil exploration from paleoceneearly eocene sequence in cambay rift basin, india. Tectonosedimentary evolution of northern part of cambay basin tusar ranjan sahoo1 and mainak choudhuri2. 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. Gaurav siddharth department of earth science gairola, indian institute of technology, bombay.
The kutchsaurashtra, cambay and narmada basins are pericontinental rift basins in the western margin of the indian craton. Lower tapi basin consists of main tapi stream from ukai reservoir to its mouth in the gulf of cambay. Featured items newest items bestselling alphabetical. Study of the deccan traps of cambay basin by geophysical. Sanchor block tharad block ahmedabadmehsana block tarapur block broach block narmada block the cambay shale is the main source rock in this basin. Mehsana 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.
Sedimentary basin directorate of petroleum dop, gujarat. 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. Evaluation of cambay shale cambay basin, india using geomechanical properties. The cambay rift basin, covers area from surat in the south to sanchor in the north. 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. Pdf formation evaluation of fractured basement, cambay. Integrated reservoir characterization of cambay shale for shale gas. Cambay, kambay or khambhat, was a princely state during the british raj. Gas shale potential of cambay formation, cambay basin, india somen mishra1 and b.
The formation of the cambay basin began following the extensive outpour of deccan basalts deccan trap during late cretaceous covering large tracts of western and central india. This results in anisotropy, which is an important issue in exploration. The basin s presence was suspected from gravity and magnetic data in the late 1980s but not confirmed until 1999 from seismic and drilling. This paper is an attempt to address the hydrocarbon prospectivity of deccan trap in the northeastern part of the basin by. Cretaceous sediments which underlie the deccan traps are exposed in the eastern and western margins of the basin and are also encountered in. Saurashtra craton lies on the west of cambay basin while aravalli is located in. Basin printers inc in williston, nd get driving directions to 7 w broadway williston, nd 58801. Hydrocarbon prospectivity of deccan trap in northern. The economic driver behind the quest to characterize such dense sandstone reservoir is that. Source potential and reservoir fabric of the cambay shale, cambay basin. Cambay basin is a narrow, nnwsse trending intracratonic rift basin, formed at the end of cretaceous which is located on western margin of the indian shield fig.
The upper paleocene to middle eocene cambay shale was evaluated for shale oil, and the paleocene olpad formation was evaluated for tight sandstone gas. The stype blocks are situated onshore in the prolific cambay basin, gujarat. The effective source rocks in the north cambay basin, india. The radial drainage pattern exhibited in the saurashtra peninsula is an outcome of these fault systems. Aug 25, 20 shale formations have laminated structures with significant variations in mechanical properties along the orientations of the bedding plane. Entire basin is divisible into five tectonic blocks fig 1. Exploring possible existence of dense ferruginous sandstone. The cambay basin is an elongated, intracratonic rift basin graben of late cretaceous to tertiary located in the state of gujarat in northwestern india. Eocenemiocene cambay deltaic assessment unit 80430102. World petroleum resources project assessment of potential.
Eocenemiocene cambay deltaic assessment unit 80430102 eocenemiocene cambay deltaic assessment unit 80430102. India cambay exploration basin report wood mackenzie. Cambay101 sedimentary basin petroleum reservoir scribd. In the following period, relative subsidence of the basin continued leading to the accumulation of the younger cambay shale.
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