Gas shale potential of cambay formation, cambay basin, india somen mishra1 and b. The cambay basin is a tertiary intracratonic graben in the western onshore part of india. Formation evaluation of fractured basement, cambay basin. The cambay basin is a tertiary intracratonic graben in the western. Production and well operations production chemistry, metallurgy and biology corrosion inhibition and management including h2s and co2 1. The discovery of the barmer basin, rajasthan, india, and. 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. The kadi and kalol formations of early to middle eocene age are thick clastic wedges in the northern part of the cambay basin, india. Reservoir characterization case study, cambay basin, india.
Twodimensional velocity model of the crust beneath the south. The regional geology of the south cambay region is from. This basin extends to the north in offshore as a narrow graben. Sedimentary rocks in this petroleum province range in age from paleocene to recent and were deposited in a tertiary rift basin. In the kalol field, several thin clastic reservoirs are sandwiched within the main. The discovery of the barmer basin, rajasthan, india, and its. The town of khambat cambay in presentday gujarat was its capital. 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 basin is divided into five tectonic blocks separated by major cross trends. Samanta, mishra, and misra 1994 suggested that the organic matter derived from land plants and deposited in restricted marine environment of the cambay. The gulf of cambay and the rann of kutch were perhaps once connected, and. Basin information directorate general of hydrocarbons dgh. The deccan trap, composed of horizontal lava flows, forms the basement of the.
The tapi and narmada have established their courses along faulted planes or rift valleys. It consists of the basic knowledge of the geology of cambay basin, basin analysis, petroleum geology, study of well logs, seismic data visualization, its. Stratigraphic analysis of kadi and kalol formations, cambay basin. Bombay province cambay basin the cambay basin began as a failed rift in the late cretaceous during which time. Basin and kalol formation in the north cambay basin. The basins presence was suspected from gravity and magnetic data in the late 1980s but not confirmed until 1999 from seismic and drilling. After a brief description of the cambay basin s geology, the other aspects of exploration were. After a brief description of the cambay basin s geology, the other aspects of exploration were discussed.
Bombay geologic province eocene to miocene composite. Asia india gulf of cambay cambay basin hazira field 0. Most of the discovered oil in this block is in hazad sands of the ankleshwar formation. The basin, located in the western states of india, has been actively explored since 1960 with production started in 1961 by ongc. Reservoir characterization, cambay basin, inversion introduction. 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. Note the cyclic pattern in the neutrondensity log associated with episodic lava flows. Cambay basin ongc only asset report cambay basin ongc only 11 june 2019. Biostratigraphic data, however, indicate it was intermittently connected to marine waters via either the cambay basin, the kutch basin, or across the devikot high.
After a brief description of the cambay basin s geology, the other aspects of. Understanding basement fracture architecture in padra. 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. Bombay offshore basin ongc only report wood mackenzie. Tectonosedimentary evolution of northern part of cambay. Understanding basement fracture architecture in padra field. The subject well is a recently drilled and completed in cambay field offshore in west coast 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. Shale oil exploration from paleoceneearly eocene sequence in. India cambay exploration basin report wood mackenzie.
The quaternary geology of the cambay basin is studied with the help of aerial photographs and spot checking in the field. 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 study area is a part of the pericratonic sabarmati cambay rift basin of western peninsular india, which has experienced in the historical past four earthquakes of about six magnitude located. The total area of the basin is 51 000 sq km including 2500 sq km in the shallow water of the gulf of cambay. The key fields in the cambay basin are ankleshwar, kalol, sobhasan and gandhar. Reasons for low recovery have been ascribed to poor reservoir facies and limited reservoir thicknesses. Mineralogical and morphological characterization of older.
The kalol field in the cambay basin of india was discovered in 1961 and has been producing through more than 608 wells from kalol reservoirs but the cumulative production up until 2008 was only 95. Cambay basin in gujarat holds 206 bcf gas in one zone. Study of cambay and krishnagodavari basin for shale oil. Schematic geological cross sections along the lines aa, bb, cc, and dd are in. Cambay basin geology regional and local aspects cambay basin origin basin origin timeage intracratonic rift basin cretaceous basin category category i proven, commercially productive basin area sq.
Brittleness modeling of cambay shale formation for shale. The pss are sr4 at the base of the kalol formation. Gas shale potential of cambay formation, cambay basin, india. Aussie oil and gas explorer oilex today said its cambay basin discoveries in gujarat hold 206 billion cubic feet bcf of gas and 8 million barrels of condensate reserves in just one zone. The cambay basin is an intra cratonic graben and bounded by series of faults one after another paralleling the dharwar trend and cuts across the narmada and aravalli trends. In the north, the basin narrows, but tectonically continues beyond sanchor to pass into the barmer basin of rajasthan. The basin s presence was suspected from gravity and magnetic data in the late 1980s but not confirmed until 1999 from seismic and drilling. In the southern cambay basin, it was sourced from a higher plant fraction deposited in marine or fluvial deltaic environment sivan et al. Oct 09, 2010 the cambay basin geological setting the cambay basin occupies an area of approximately 56,000 sq. After a brief description of the cambay basins geology, the other aspects of exploration were. Pdf outcrop study in south cambay basin, india researchgate. 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. Overlain to this is the kalol formation which is a prolific producer in the cambay basin. After a brief description of the cambay basins geology, the other aspects of exploration were discussed.
The bombay high field is by far the largest in the basin. Background geology 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. Cambay, kambay or khambhat, was a princely state during the british raj. 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. 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. 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. Hydrocarbon prospectivity in stratigraphic traps within cambay. 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. Subsurface understanding of an oil field in cambay basin. Location map for the cambay basin, india, showing major structural elements. A pericratonic basin, it is characterized by extensive carbonateplatform shelf development during middle eocene to middle miocene time. Tectonosedimentary evolution of northern part of cambay basin. Early eocene equatorial vegetation and depositional.
Located in the prolific cambay basin, the cambay asset is the most significant component of the companys portfolio, covering 161 km. After landing the completion, two mechanical plugs were installed to nipple down bop and nipple up xmas tree. Source potential and reservoir fabric of the cambay shale. It is bounded by basin marginal faults in the east and west. The study area falls in the sanchorpatan tectonic block in the northern part of cambay basin. 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. Integration of rock physics and seismic were used in order to derive a solution to delineate the complex reservoir facies.
Save search save a search to perform it again, and optionally to be alerted when new content matches. Stratigraphic analysis of kadi and kalol formations, cambay basin, india authors. Although cambay is a mature basin, oilsource genetic relationship is yet not well understood due to complicated geology involving multiplicity of depressions, source rocks and reservoirs. The basin, around 425 km long with an average width of about 8 km, extends from luni river in the north to tapti. Application of attributebased inversion and spectral. 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. Black cotton soils, lateritic soils and sandy loams, flood plain deposits, levees, swamps, salt waste, barrier spits, sand hills, undulating.
In this paper, mineralogical and morphological characteristics of the older cambay shale and the top olpad formation from the northern cambay basin, india have been characterized using well logs, xray diffraction xrd, field emission scanning electron microscopy fesem coupled with energy dispersive xray spectroscopy eds or edx and atomic. Pdf the effective source rocks in the cambay basin, india. May 12, 2020 in the southern cambay basin, it was sourced from a higher plant fraction deposited in marine or fluvial deltaic environment sivan et al. Sr5 and sr6 at the top and middle, respectively, of the cambay shale formation. The rainfall is heavy in the south, decreasing northwards from 100 inches 254 cm to 20 inches 51 cm. Cambay basin, india from refraction and wideangle reflection data. Brittleness modeling of cambay shale formation for shale gas.
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. Evaluation of cambay shale cambay basin, india using geo. It is based on the subsurface study of on oil field in cambay basin. Morphotectonic of sabarmaticambay basin, gujarat, western india. The eocenemiocene bombay shelf au is an oilprone assessment unit located offshore along the west coast of india. Apr 27, 2020 located off the west coast of india, ongcs fields in the gujarat offshore and mumbai basin collectively referred to as bombay offshore basin in this report contribute almost 44% of indias oil production. Due to this complex geology and masking of signal it was crucial to delineate the lithology to map the stratigraphic reservoirs in the zone of interest. Subaerial denudational, fluviatile, aeolian and marine processes have produced the recent deposits that cover the cambay basin. The entire basin is divided into five tectonic blocks based on transverse fault systems, namely narmada and jambusarbroach in the south cambay basin and cambaytarapur, ahmedabadmehsana and patantharadsanchor in the north.
Evaluation of cambay shale cambay basin, india using geomechanical properties, journal of petroleum exploration and production technology, 20, pp. The system covers 9320 km 2 encompassing 20 different oil and gas accumulations. Mineralogical assemblage of cambay shale of north cambay basin. Cambay basin is bounded on its eastern and western sides by basin margin faults and extends south into the offshore gulf of cambay, limiting its onshore area to 7,900 mi2. This tender document consists of the following annexures, which are enclosed. Well logs within the deccan trap basement section in padra field. World petroleum resources project assessment of potential. 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. Morphotectonic of sabarmaticambay basin, gujarat, western. Jun 11, 2019 the key fields in the cambay basin are ankleshwar, kalol, sobhasan and gandhar. Bombay geologic province eocene to miocene composite total. Stars show pre2006 earthquake stars show pre2006 earthquake locations while circles show post2006 epicenters. Indian petroleum publishers, 2004 petroleum 171 pages. Location map of cambay basin on the map of india right.
22 716 861 1360 1497 1631 1005 1630 1629 1492 448 1306 357 1056 242 690 1167 1422 298 1400 1498 724 401 642 1616 898 740 873 805 166 871 62 881 757 426 281