The production sharing contract psc was signed in june 1998, between the government of india and a consortium consisting of ongc, tata petrodyne and cairn india. Reservoir characterization case study, cambay basin, india. Stratigraphic analysis of kadi and kalol formations, cambay basin, india. Geological survey is the bombay geologic province province 8043, which is an oilprone area, both onshore and offshore fig. The system covers 9320 km 2 encompassing 20 different oil and gas accumulations. It is based on the subsurface study of on oil field in cambay basin. The position of the basin relative to plate margins 3. Sichuan basin shale gas unconventional play report wood. Aerially, this is the lasrgest block in the basin, extending from dholka. Study area the area under study lies in the eastern part of the central block of gandhar field, cambay basin, india.
Biostratigraphic data, however, indicate it was intermittently connected to marine waters via either the cambay basin, the kutch basin, or across the devikot high. Well logs within the deccan trap basement section in padra field. The cambay basin is one of the major hydrocarbon producing basins of india fig. Production and well operations production chemistry, metallurgy and biology corrosion inhibition and management including h2s and co2 1. After a brief description of the cambay basin s geology, the other aspects of exploration were. The block cbonn20105 lies in the ahmedabadmehsana tectonic block of the cambay basin. It consists of the basic knowledge of the geology of cambay basin, basin analysis, petroleum geology, study of well logs, seismic data visualization, its. The well known agriculturally rich alluvial basin of gujarat rises from the estuarine tracts between narmada and tapi rivers, and extends 250 miles 402 km northwards merging into the desert plains of rajasthan and the rann of kutch. Location map of cambay basin on the map of india right.
Where the basin lies close to a plate margin, the type of plate interaction occurring during sedimentation. Basin, evaluated the functions of geological factors in overpressure generation based on our understanding of the compressional tectonic history and its effect on overpressure distribution, and finally, simulated the processes of overpressure generation and evolution in the basin through quantitative modeling. Stars show pre2006 earthquake stars show pre2006 earthquake locations while circles show post2006 epicenters. Sedimentary rocks in this petroleum province range in age from paleocene to recent and were deposited in a tertiary rift basin. Geology of cambay basin pdf april 19, 2020 admin 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. Shale oil exploration from paleoceneearly eocene sequence in. This results in anisotropy, which is an important issue in exploration. The geology of chad includes an area of metamorphic rocks of precambrian age surrounding the chad basin which is floored with tertiary and quaternary sediments. It consists of the basic knowledge of the geology of cambay. It is about kilometres 80 mi miles in length, and divides the kathiawar peninsula to the west from the eastern part of gujarat state. The cbos2 block in the cambay basin is located offshore west india in the gulf of khambat figure 1. Formation evaluation of fractured basement, cambay basin, india. Assessment of potential shale gas resources of the bombay. Aqueduct metadata document mekong river basin study pdf.
Sedimentary basin directorate of petroleum dop, gujarat. This includes rift basins, foreland basins, pullapart basins, back arc basins, sag basins and other. The basin, located in the western states of india, has been actively explored since 1960 with production started in 1961 by ongc. After a brief description of the cambay basin s geology, the other aspects of. One of the biggest oil fields discovered in gujarats cambay. Source potential evaluation of paleogeneneogene sediments in cambay tarapur area, cambay basin, india m. Note the cyclic pattern in the neutrondensity log associated with episodic lava flows. Source potential evaluation of paleogeneneogene sediments in. Overpressure generation and evolution in a compressional. Pdf it is widely known that the world consumes two barrels of oil for every barrel discovered.
This basin is an intracratonic rift graben situated in the western part of the indian subcontinent and forms the northern extension of the large bombay offshore basin. In the north, the basin narrows, but tectonically continues beyond sanchor to pass into the barmer basin of rajasthan. Mehsanaahmedabad, tarapur, broach and narmada, figure 1. 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. Prefeasibility report for exploratory drilling operation at. Ahmedabadmehsana tectonic block this block lies between the khari river in the north and the vatrak river in the south. Cambay, cauvery, and krishnagodavari are located along the margins of the indian. Subsequently, there was a strong tectonic activity that resulted in the development of the mehsana horst and other structural highs associated with basement faults. The radial drainage pattern exhibited in the saurashtra peninsula is an outcome of these fault systems.
Apart from the bounding faults, numerous fault systems and fractures have been identified within the saurashtra horst sant 1999. The cambay basin occupies an area of approximately 54,000 sq. Study of cambay and krishnagodavari basin for shale oil. Pdf outcrop study in south cambay basin, india researchgate. Cratchley institute of geological sciences, exhibition road, south kensington, london sw7, u. An attempt has been made to determine shalegas prospectivity of cambay shale integrating wireline log, mud log, cutting and core data. 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. These basins were formed by rifting along precambrian tectonic trends. Quaternary stratigraphy, drainagebasin development, and. Cambay basin in gujarat holds 206 bcf gas in one zone. Evidence from field relationship and sedimentological study adeigbe, o. The eocenemiocene bombay shelf au is an oilprone assessment unit located offshore along the west coast of india.
The study area location in the cambay basin, india, with distribution well location in the south ahmedabadmehsana block. 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. Geological modeling of paleogene neogene sequences from akholjuni cambay basin to cacd area mumbai offshore basin. Petroleum geology of bombay offshore basin 1995 unpublished report, ongc. Geological modeling of paleogene neogene sequences. Pdf the effective source rocks in the cambay basin, india. The cambay basin the cambay basin occupies an area of approximately 56,000 sq. Division of essar oil limited to cambay basin, a proven. Morphotectonic of sabarmaticambay basin, gujarat, western. Geophysical and geological evidence for the benuechad basin. Black cotton soils, lateritic soils and sandy loams, flood plain deposits, levees, swamps, salt waste, barrier spits, sand hills, undulating. The length of the tapi river in lower tapi basin is 129 km. Bombay geologic province eocene to miocene composite. Nov 03, 2015 a basin in the geological sense, is a depression in the earths lithosphere.
The geology, tectonics, and stratigraphy figure 2 of the basin. Bombay geologic province eocene to miocene composite total. Location map for the cambay basin, india, showing major structural elements. Sanchor block tharad block ahmedabadmehsana block tarapur block broach block narmada block the cambay shale is the main source rock in this basin. The discovery of the barmer basin, rajasthan, india, and. The narmada, tapti, mahi and sabarmati rivers drain into it. The cambay rift basin, covers area from surat in the south to sanchor in the north. Geophysical and geological evidence for the benuechad basin cretaceous rift valley system and its tectonic implications c. Evaluation of cambay shale cambay basin, india using geo. This is the first extensively deposited sand of hazad member. 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. Louis centre geologique et geophysique, universite des sciences, 34060 montpellier, france and d.
Regional tectonic framework, structure and evolution of the western marginal basins of india. The current study deals with the cambay basin where silty sand reservoir has been identified as hydrocarbon bearing. 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. Among the 76 priority geologic provinces identified for the world energy assessment project of the u. Oct 26, 2014 cambay basin, which extends from surat in the south to sanchor in the north, covers an area of about 59,000 sq km with a hydrocarbon resource of more than 15 billion barrels. Subsurface understanding of an oil field in cambay basin 2. There are precambrian rocks in the tibesti mountains in the north and the east whilst in eastern chad are basement rocks, some of which extend into darfur in neighbouring sudan. The key fields in the cambay basin are ankleshwar, kalol, sobhasan and gandhar. The kadi and kalol formations of early to middle eocene age are thick clastic wedges in the northern part of the cambay basin, india. Subsurface understanding of an oil field in cambay basin anirudha singh, indian school of mines summary it is based on the subsurface study of on oil field in cambay basin. Utilization of seismic attributes for reservoir mapping. Subsurface understanding of an oil field in cambay basin. A pericratonic basin, it is characterized by extensive carbonateplatform shelf development during middle eocene to middle miocene time. Sichuan basin shale gas unconventional play report summary gas demand in china continues to grow, and while domestic gas production has increased, over the longer term, conventional sources will not be able to keep pace with surging demand.
Anambra basin is one of the energyrich inland sedimentary basins in nigeria. The lower tapi basin extends over an area of 2920 sq. The cambay basin can be divided into six tectonic blocks. Quaternary stratigraphy, drainagebasin development, and geomorphology of the lake manix basin, mojave desert guidebook for fall field trip, friends of the pleistocene, pacific cell, october 47, 2007. Subaerial denudational, fluviatile, aeolian and marine processes have produced the recent deposits that cover the cambay basin. The effective source rocks in the north cambay basin, india. The basin s presence was suspected from gravity and magnetic data in the late 1980s but not confirmed until 1999 from seismic and drilling. Basin information directorate general of hydrocarbons dgh. Location map of cambay basin of india showing study area introduction. The cambay shale is the main source rock in this basin. 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. Gas strike in shale reservoir in dholka field in cambay basin. Understanding basement fracture architecture in padra.
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. The us oil supply has been on an unprecedented surge of 1. After a brief description of the cambay basin s geology, the other aspects of exploration were discussed. The kutchsaurashtra, cambay and narmada basins are pericontinental rift basins in the western margin of the indian craton. Major lineaments in this block trend in the nnw sse direction. It covers an area of about 53 500 km2 inclusive of about 2 500 km2 below gulf of cambay. Schematic geological cross sections along the lines aa, bb, cc, and dd are in. Cawston creek is a typical small drainage basin approximately 25 km 2 within a very steep glaciated valley. Tectonosedimentary evolution of northern part of cambay basin. Gas shale potential of cambay formation, cambay basin.
In the northern part of the ahmedabadmehsana block, coal, which is well developed within the deltaic sequence in kalol, sobhasan and mehsana fields, is also inferred to be an important hydrocarbon source rock. Gas shale potential of cambay formation, cambay basin, india. The quaternary geology of the cambay basin is studied with the help of aerial photographs and spot checking in the field. Cambay basin cambay basin is situated in the state of gujarat which is in western part of india. Pdf evaluation of cambay shale cambay basin, india using. Asia india gulf of cambay cambay basin hazira field 0. Aug 25, 20 shale formations have laminated structures with significant variations in mechanical properties along the orientations of the bedding plane. Reservoir characterization of cambay shale cambay basin, india in reference to shale gas exploration and exploitation. In geology, basement is defined as any rock below a sedimen. Understanding reservoir architecture of cambay shale india has strategic compulsion to explore and develop shale gas due to rising energy. Regional tectonic framework, structure and evolution of the.
Introduction and geologic setting the cambay basin is an elongated, intracratonic late cretaceous to tertiary rift basin, located in the state of gujarat in northwest india. The data selection and validation process for the mekong river basin study involved three steps. Detection of thin sand by using seismic inversion in gandhar. Understanding basement fracture architecture in padra field, south. 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. Pdf we evaluated the source potential of three paleogene formations. 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. Indian petroleum publishers, 2004 petroleum 171 pages. In this work, an effort is made to integrate the current data.
The bombay geologic province is bounded on the north by the. Gas shale potential of cambay formation, cambay basin, india somen mishra1 and b. In the southern cambay basin, it was sourced from a higher plant fraction deposited in marine or fluvial deltaic environment sivan et al. Lower tapi basin consists of main tapi stream from ukai reservoir to its mouth in the gulf of cambay. Formation e valuation of fractured basement, cambay basin, india figure 1.