The Significant Impact of Intraformational Seal to Hydrocarbon Accumulation of Mixed Carbonate - Siliciclastic Sequences In Oligo-Miocene Interval, North Madura Platform, East Java Basin

2020 ◽  
Author(s):  
A. K. Wijaya
Keyword(s):  
Oil And Gas ◽  
Carbonate Reservoir ◽  
Hydrocarbon Accumulation ◽  
Hydrocarbon Migration ◽  
The North ◽  
Gas Leak ◽  
Multiple Reservoir ◽  
Seal Strength ◽  
Gas Bearing ◽  
Mixed Carbonate

The major reservoir within the North Madura Platform is the Oligo-Miocene Interval, which consists of oil and gas-bearing reservoirs, with multiple reservoir layers and multiple hydrocarbon contacts. The interval comprises of a stacked high frequency cycles of mixed carbonate-siliciclastic lithology component sitting in the paleo-high. It has become very important in the context of hydrocarbon accumulation since the components play very dissimilar roles and become reservoir-seal pairs, which resulted in the existence of intraformational seal. Based on the carbonate to siliciclastic ratio, from deeper to shallower interval, it can be divided into three cycles, namely first cycle with carbonate-dominated interval, second cycle with mixed carbonate-shale interval, and third cycle consists of massive carbonate sequences. The vertical hydrocarbon migration, both oil and gas, occurred within the known trap in the study area, filled the reservoirs from deeper to shallower interval with subject to seal capacity of each intraformational seal and leak points in the trap. The first cycle consisted of oil indicated that the seal breached as reservoir become fully saturated and some of oil and most of the gas leak. The second cycle, which consisted of multiple reservoir-seal pairs with oil and gas being accumulated depending on the seal strength. The third cycle, which is massive carbonate reservoir, is capped by thick marine shale as a roof seal that has been proven for gas being trapped. Better understanding on intrafomational seal, both micro and macro characteristics, can be highly beneficial to identify potential overlooked zone as well as contributing to the proper judgment on the likelihood of hydrocarbon accumulation.

scholarly journals Geology and prospects of oil and gas bearing of east — Canadian continental margins

2019 ◽  
Vol 59 (4) ◽  
pp. 656-669
Author(s):  
A. Zabanbark ◽  
L. I. Lobkovsky
Keyword(s):  
Nova Scotia ◽  
Continental Margin ◽  
Late Cretaceous ◽  
Oil And Gas ◽  
Sedimentary Basins ◽  
Wide Distribution ◽  
Labrador Sea ◽  
Continental Margins ◽  
The North ◽  
Gas Bearing

At the limit of the East-Canadian continental margin there are three oil and gas regions from north to south: Labrador Sea shelves, margins of the Great Newfoundland Bank and the continental margin of Nova Scotia. In each of these distinguishing regions are a number of sedimentary basins completely plunging under the water. At the shelf of Labrador Sea distinguishing the following large sedimentary basins: Saglek, Hopdale and Havke, at the margin of Newfoundland Bank it is known the basins: Jeanne d’Arc, Flemish Pass and Orphan. At the Nova Scotia shelf there are Nova Scotian and Sable basins. It is remarkable at the lofty latitude like of Labrador Sea region the age of the productive sediments beginning from more ancient rocks (Paleozoic), than in basins situated in law latitude (Mesozoic). In consequence of this the stratigraphy diapason of oil and gas bearing of the north latitude is considerably wide. The prospect of oil and gas bearing in all region is related principally with continental slopes and turbidites sediments in its. Late Jurassic and early Cretaceous reservoirs would be the aim for deep drilling sediments. Wide distribution of late Cretaceous and early Tertiary prospects reservoirs of oil and gas is quite really so far as they are bedded in the shallow horizons. Also the prospect of oil and gas bearing at the margin of the basin is related to late Cretaceous and Tertiary sediments, to deposits of fan and diapirs salt.

scholarly journals DETECTION ZONES OF DISJUNCTIVE DISLOCATIONS FOR THE TERRITORY OF NORTHERN SAKHALIN BY DATA OF SPACE SURVEYS

2021 ◽  
Vol 4 (1) ◽  
pp. 79-85
Author(s):  
Olesya V. Kuptsova ◽  
Alexey A. Verkhoturov ◽  
Vyacheslav A. Melkiy
Keyword(s):  
Oil And Gas ◽  
Geophysical Methods ◽  
Sakhalin Island ◽  
Landsat 8 ◽  
Electromagnetic Spectrum ◽  
Industrial Facilities ◽  
The North ◽  
Geological And Geophysical Methods ◽  
Gas Bearing ◽  
Spectral Channels

The article presents results of the research of disjunctive dislocations of the earth's crust in northern part of the Sakhalin Island by analyzing the fields of lineaments, which identified on basis of satellite surveys using the LEFA software package. The object of research was chosen not by chance: eastern part of territory of the north of Sakhalin Island is quite well studied by geological and geophysical methods in order to identify oil and gas-bearing structures, as well as in connection with the close attention to it after catastrophic Neftegorsk earthquake on May 28, 1995. The result of work of the predecessors made it possible for verify the reliability of results obtained and assess of prospects to using automated decryption technologies to identify seismically active zones. The purpose of work was to create maps of active fault zones on studied territory. In process of the work, the SRTM data and Landsat-8 satellite images for 2015-2020, obtained in eight spectral channels, were analyzed using algorithms for detecting the location of lineaments based on methods of mathematical processing of images using different algorithms. It was revealed that images obtained in the red, infrared zones of the electromagnetic spectrum (4, 5, 6, 7), and the panchromatic channel (8) are most informative for identifying disjunctive disorders. Based on the data obtained, maps of disjunctive disorders of Sakhalin Island on scale of 1: 500,000 compiled. The article has certain novelty due to fact that the LEFA technological techniques were first used for research the geologically complex structures of Northern Sakhalin. The main results of the work will be useful in choosing places for construction of economic and industrial facilities, as well as in the exploration, search and operation of mineral deposits.

scholarly journals Hygienic environmental assessment in the oil-and-gas bearing area on the base of cytogenetical and molecular-genetic methods

2019 ◽  
Vol 96 (2) ◽  
pp. 121-124
Author(s):  
N. N. Ilyinskikh ◽  
E. N. Ilyinskikh ◽  
I. N. Ilyinskikh ◽  
A. E. Yankovskaya ◽  
Stanislav A. Saushkin
Keyword(s):  
Oil And Gas ◽  
Micronucleus Test ◽  
Molecular Genetic ◽  
Oil Fields ◽  
Control Group ◽  
The North ◽  
Xenobiotic Biotransformation ◽  
Elevated Rate ◽  
Gas Bearing ◽  
Khanty Mansi Autonomous

The study have been conducted in settlements located near oilfields of the Nizhnevartovsk area, the Khanty-Mansi autonomous district (Russian Federation). There were examined 802 persons aged of from 18 to 56 years not proximately employed in processes of the oil extraction. Control group was consisted of329 residents of the north of Tomsk Region living in the area without any polluting environment industry. By using such methods of analysis as micronucleus test in human buccal cells, the xenobiotic biotransformation of both GSTM1 and GSTT1 gene polymorphism, as well as the assessment of oil contamination of local drinking water there was executed the hygienic assessment of ecology in the settlements located near oil fields. The elevated rate of cytogenetic disorders was established to be observed most of all in the residents of this region, as well as in persons recently moved to this area. Most significant deviations from the control according to the micronucleus test were detected in individuals with the GSTM1 (0) /GSTT1(0) genotype. In the control group no such consistent pattern was seen.

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