Hydrocarbon Origin and Accumulation Model of Putaohua Reservoir in Southern Daqing Placanticline Area

2012 ◽  
Vol 616-618 ◽  
pp. 64-68
Author(s):  
Na Wang ◽  
Shuang Fang Lu ◽  
Dian Shi Xiao
Keyword(s):  
Source Rock ◽  
Oil And Gas ◽  
Source Area ◽  
Analysis Data ◽  
Research Area ◽  
Hydrocarbon Generation ◽  
Small Contribution ◽  
Hydrocarbon Migration ◽  
Oil And Gas Exploration ◽  
Accumulation Model

There are great oil and gas exploration prospect in south of Daqing Placanticline, with unclear understanding of source rock and accumulation model, the progress of oil exploration is restricted. To definite the source of oil and gas, according to chromatography data and analysis data, combined with potential of hydrocarbon generation and expulsion, oil-gas migration pathway, the hydrocarbon migration and accumulation model is proposed. It can be concluded that the oil from Putaohua reservoir in the south of Daqing Placanticline area mainly come from K2qn1 source rock locally, while the hydrocarbon sources of K2qn1 in the east and west of the depression makes small contribution to the research area. Migrate in source area is the main hydrocarbon migration and accumulation mode. Re-define the oil source of Putaohua reservoir can help enhance the cognition of the hydrocarbon accumulation condition and accumulation model, in order to direct the research for the accumulation and distribution principle of oil and gas exploration and favorable area prediction in the future.

Hydrocarbon Accumulation Conditions and Reservoir Characteriscs of Shahejie Formation in Tangzhuang Area

2013 ◽  
Vol 734-737 ◽  
pp. 1391-1394
Author(s):  
Ming Jian Wang ◽  
Xun Hua Zhang
Keyword(s):  
Source Rock ◽  
Central Region ◽  
Oil And Gas ◽  
Geophysical Data ◽  
Hydrocarbon Generation ◽  
Hydrocarbon Accumulation ◽  
Dominant Type ◽  
Oil And Gas Exploration ◽  
Sand Body ◽  
Shahejie Formation

Guided by the theory of petroleum system, we analyzed hydrocarbon accumulation elements and conditions of the Shahejie Formation in Tangzhuang area and concluded the hydrocarbon accumulation model based on the geological and geophysical data. Hydrocarbon comes from the source rock of Es3 in Linyi sub-sag located to the southeast of Tangzhuang area. Reservoir mainly is clastic, followed by carbonate. There are 4 source-reservoir-cap assemblages in the Shahejie Formation. The Es3 source rock of different tectonic units in Linnan sub-sag has experienced different hydrocarbon generation stages. The central region experienced two hydrocarbon generation stages while the edge only experienced one stage. The hydrocarbon generated by the source rock of Es3 in Linnan sub-sag mainly migrated to Tangzhuang area along fault and sand body. The structural trap is the dominant type followed by structure-lithologic trap and lithologic trap. Based on the analysis of hydrocarbon accumulation condition, we concluded the lower generating and upper reserving model of the study area. The findings will play an important role in guiding Tangzhuang oil and gas exploration.

scholarly journals GEOCHEMICAL AND GEOSTATISTICAL ASSESSMENT OF CRETACEOUS COALS AND SHALES IN SOME NIGERAIN SEDIMENTARY BASINS FOR THEIR HYDROCARBON PRONESS AND MATURITY LEVELS

2020 ◽  
Vol 1 (2) ◽  
Keyword(s):  
Source Rock ◽  
Oil And Gas ◽  
Linear Regression Analysis ◽  
Sedimentary Basins ◽  
Source Rocks ◽  
Hydrocarbon Generation ◽  
Good Source ◽  
Type Iii ◽  
Limit Value ◽  
The Impact

The Rock–Eval pyrolysis and LECO analysis for 9 shale and 12 coal samples, as well as, geostatistical analysis have been used to investigate source rock characteristics, correlation between the assessed parameters (QI, BI, S1, S2, S3, HI, S1 + S2, OI, PI, TOC) and the impact of changes in the Tmax on the assessed parameters in the Cretaceous Sokoto, Anambra Basins and Middle Benue Trough of northwestern, southeastern and northcentral Nigeria respectively. The geochemical results point that about 97% of the samples have TOC values greater than the minimum limit value (0.5 wt %) required to induce hydrocarbon generation from source rocks. Meanwhile, the Dukamaje and Taloka shales and Lafia/Obi coal are found to be fair to good source rock for oil generation with slightly higher thermal maturation. The source rocks are generally immature through sub-mature to marginal mature with respect to the oil and gas window, while the potential source rocks from the Anambra Basin are generally sub-mature grading to mature within the oil window. The analyzed data were approached statistically to find some relations such as factors, and clusters concerning the examination of the source rocks. These factors were categorized into type of organic matter and organic richness, thermal maturity and hydrocarbon potency. In addendum, cluster analysis separated the source rocks in the study area into two groups. The source rocks characterized by HI >240 (mg/g), TOC from 58.89 to 66.43 wt %, S1 from 2.01 to 2.54 (mg/g) and S2 from 148.94 to 162.52 (mg/g) indicating good to excellent source rocks with kerogen of type II and type III and are capable of generating oil and gas. Followed by the Source rocks characterized by HI <240 (mg/g), TOC from 0.94 to 36.12 wt%, S1 from 0.14 to 0.72 (mg/g) and S2 from 0.14 to 20.38 (mg/g) indicating poor to good source rocks with kerogen of type III and are capable of generating gas. Howeverr, Pearson’s correlation coefficient and linear regression analysis shows a significant positive correlation between TOC and S1, S2 and HI and no correlation between TOC and Tmax, highly negative correlation between TOC and OI and no correlation between Tmax and HI. Keywords- Cretaceous, Geochemical, Statistical, Cluster; Factor analyses.

The Analysis of Thrust Fault in the Tensional Environment

2010 ◽  
Vol 29-32 ◽  
pp. 1506-1511
Author(s):  
Hui Hao ◽  
Jia Fu Qi ◽  
Jian Li Cheng
Keyword(s):  
Oil And Gas ◽  
Fault Plane ◽  
Hanging Wall ◽  
Thrust Fault ◽  
Small Displacement ◽  
Late Period ◽  
Hydrocarbon Migration ◽  
Growth Coefficient ◽  
Oil And Gas Exploration ◽  
Structure Research

Gravity glide thrust fault is always a significant type of thrust fault in the extensional basin. The research on it is of great significance for its playing an important role in hydrocarbon migration and accumulation, being one of the major targets of oil and gas exploration. Through finely analyzing Paleogene structure of Wangguantun region in Huanghua sag, specially re-analyzing the particular fault, utilizing kinematic equilibrium rule and analyzing the thrust fault developing process, I found there were discrepancies in predecessors′ interpretation to the thrust fault in the area: this fault did not form during the late period. It formed from a slump fault with small growth rate whose fault section dip changed mild, even level because of depocenter migration. The fault was pushed by the force of gravity so that the hanging wall slid along the fault plane, and makes the scan finally in the late revealed the nature of a thrust fault. Although the shape of these faults is very similar with the thrust fault formed late in previous view (early growth coefficient is small, displacement had little change), there are huge differences on origin of these two faults whose petroleum geological significance is quite different. This study is very significant to the structure research of the region and the other similar regions, providing the new theory for oil exploration.

Regional Seal as Key Controlled Elements of Petroleum Accumulation in the Rift Basin

2012 ◽  
Vol 524-527 ◽  
pp. 190-193
Author(s):  
Hai Yan Hu ◽  
Zhe Zhao ◽  
Song Lu ◽  
Hang Zhou Xiao
Keyword(s):  
Source Rock ◽  
Oil And Gas ◽  
Thickness Distribution ◽  
Normal Faults ◽  
Hydrocarbon Generation ◽  
Geological Condition ◽  
Rift Basin ◽  
Rift Basins ◽  
Northwest Germany ◽  
Petroleum Accumulation

Rift basin is an important petroleum basin type, in which about one third of oil and gas was discovered. To research on the main controlled elements of oil and gas accumulation, five typical rift basins in Europe are focused on the geological condition such as source rock, reservoir, seal, petroleum system, and accumulation with logging, hole, measured and analytical methods, and so on. The results showed the main regional seal controlled the petroleum distribution in the rift basin. Seals are defined by main regional seal, minor regional seas and local region according to thickness, distribution, lithostratigraphy. Viking Graben of North Sea has main regional seal about 3000m thick during late Jurassic and Cretaceous, about 81 percent of petroleum is in the Jurassic reservoir; Anglo-Dutch basin has main region thick seal during Triassic through Jurassic, and Permian reservoir accounted for 73 percent of basin reserves; Voring Basin has the main regional seal during Cretaceous through early Tertiary, the Jurassic reservoir has 85 percent of whole basin reserves; Northeast and Northwest Germany Basins have the evaporites as main regional seals during late Permian, and Permian reservoir accounted for more than 80 percent of basin reservoir, respectively. Rift Basin can develop reservoir like turbidite, source rock, seal in the basin dynamic opinion. Some main regional seals may develop overpressre because of quick subside and hydrocarbon generation at some conditions, it can strengthen seal capability. Oil and gas can migration to the main regional seal by normal faults caused by rifting, which can stop further migration so that they were accumulated under the main regional seal.

scholarly journals Conditions of oil and gas formation in the territory of the Eastern and Central Ciscaucasia

2020 ◽  
pp. 63-72
Author(s):  
D. D. Ismailov ◽  
S. G. Serov ◽  
R. N. Mustaev ◽  
A. V. Petrov
Keyword(s):  
Phase Composition ◽  
Oil And Gas ◽  
Sedimentary Cover ◽  
Research Area ◽  
Hydrocarbon Generation ◽  
Program Complex ◽  
Basin Modelling ◽  
The North ◽  
Gas Formation ◽  
Hydrocarbon Saturation

The results of studies of hydrocarbon systems of the Eastern and Central Ciscaucasia are shown. The research area covers part of the Scythian platform, namely, the northern side of the Terek-Caspian foredeep, the north-eastern part of the East Kuban depression, the Tersko-Kum depression and the Stavropol arch. Based on the results of the work and basin modelling of hydrocarbons generation, emigration and accumulation processes, the reconstruction of the history of oil and gas formation and oil and gas accumulation in the sedimentary cover of the region was completed. The basin modelling of hydrocarbon formation processes in Central and Eastern Ciscaucasia was carried out using the PetroMod (Schlumberger) program complex. The obtained results made it possible to determine the dynamics of organic substance transformation processes, evolution of oil and gas formation zones, time and expected paths of hydrocarbon migration and phase composition and degree of hydrocarbon saturation of the section. The model reliability was corrected by comparing the values of benchmarks (modern reservoir temperatures measured in wells, with their calculated values obtained as a result of modelling). The location of possible foci of hydrocarbon generation in the sedimentary cover, the migration paths, the phase composition of hydrocarbons, the intensity of hydrocarbon saturation within individual tectonic zones and structures were determined. It has been established that the main foci of hydrocarbon generation in the southern part of the studied region are located in the Chechen depression (Tersko-Caspian deep), on the platform part–in the zone of the Manych deep and Nogai stage.

Jurassic source rocks of hydrocarbon fluids in the Eastern part of the Fukan depression (Junggar oil and gas basin)

2020 ◽  
pp. 55-63
Author(s):  
Yang Houqiang ◽  
E. V. Soboleva
Keyword(s):  
Organic Matter ◽  
Oil And Gas ◽  
Research Area ◽  
Molecular Composition ◽  
Source Rocks ◽  
Hydrocarbon Generation ◽  
Gas Reservoirs ◽  
Eastern Side ◽  
Oil And Gas Reservoirs

In recent years, significant successes have been achieved in the search and exploration of oil and gas reservoirs in the Jurassic deposits on the eastern side of the Fukang depression, which is the least studied part of the Junggar oil and gas Basin. In order to find out the source of hydrocarbon generation, we studied source rocks, oil and oil-bearing sandstones (24 samples from 13 wells) from the Badaowan, Sangonghe, Xishanyao, Toutunhe and Qigu production beds of the Fukang depression research area. Based on these studies, the composition of the organic matter of the Jurassic source rocks, the properties and molecular composition of oils, as well as the characteristics of the composition of biomarkers in them are examined in detail. The results of research and interpretation of the data showed that the mudstones of the Badaowan formation were source rocks of oil from the Gumudi zone, the Fukan depression, the Bajiahai ledge and the Shaqi ledge.

scholarly journals Challenges and Prospects of Digital Core-Reconstruction Research

Geofluids ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-29 ◽  
Author(s):  
Linqi Zhu ◽  
Chong Zhang ◽  
Chaomo Zhang ◽  
Xueqing Zhou ◽  
Zhansong Zhang ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Three Dimensional ◽  
Morphological Characteristics ◽  
Research Area ◽  
Rock Properties ◽  
Reconstruction Method ◽  
Oil And Gas Exploration ◽  
Stochastic Reconstruction ◽  
Reconstruction Methods ◽  
Digital Core

The simulation of various rock properties based on three-dimensional digital cores plays an increasingly important role in oil and gas exploration and development. The accuracy of 3D digital core reconstruction is important for determining rock properties. In this paper, existing 3D digital core-reconstruction methods are divided into two categories: 3D digital cores based on physical experiments and 3D digital core stochastic reconstructions based on two-dimensional (2D) slices. Additionally, 2D slice-based digital core stochastic reconstruction techniques are classified into four types: a stochastic reconstruction method based on 2D slice mathematical-feature statistical constraints, a stochastic reconstruction method based on statistical constraints that are related to 2D slice morphological characteristics, a physics process-based stochastic reconstruction method, and a hybrid stochastic reconstruction method. The progress related to these various stochastic reconstruction methods, the characteristics of constructed 3D digital cores, and the potential of these methods are analysed and discussed in detail. Finally, reasonable prospects are presented based on the current state of this research area. Currently, studies on digital core reconstruction, especially for the 3D digital core stochastic reconstruction method based on 2D slices, are still very rough, and much room for improvement remains. In particular, we emphasize the importance of evaluating functions, multiscale 3D digital cores, multicomponent 3D digital cores, and disciplinary intersection methods in the 3D construction of digital cores. These four directions should provide focus, alongside challenges, for this research area in the future. This review provides important insights into 3D digital core reconstruction.

scholarly journals Hydrocarbon generation from Carboniferous-Permian coaly source rocks in the Huanghua depression under different geological processes

2020 ◽  
Vol 17 (6) ◽  
pp. 1540-1555
Author(s):  
Jin-Jun Xu ◽  
Qiang Jin
Keyword(s):  
Oil And Gas ◽  
Vitrinite Reflectance ◽  
Source Rocks ◽  
Bohai Bay ◽  
Hydrocarbon Generation ◽  
Oil And Gas Exploration ◽  
Geological Processes ◽  
Light Oil ◽  
Huanghua Depression ◽  
Higher Temperature

AbstractNatural gas and condensate derived from Carboniferous-Permian (C-P) coaly source rocks discovered in the Dagang Oilfield in the Bohai Bay Basin (east China) have important implications for the potential exploration of C-P coaly source rocks. This study analyzed the secondary, tertiary, and dynamic characteristics of hydrocarbon generation in order to predict the hydrocarbon potentials of different exploration areas in the Dagang Oilfield. The results indicated that C-P oil and gas were generated from coaly source rocks by secondary or tertiary hydrocarbon generation and characterized by notably different hydrocarbon products and generation dynamics. Secondary hydrocarbon generation was completed when the maturity reached vitrinite reflectance (Ro) of 0.7%–0.9% before uplift prior to the Eocene. Tertiary hydrocarbon generation from the source rocks was limited in deep buried sags in the Oligocene, where the products consisted of light oil and gas. The activation energies for secondary and tertiary hydrocarbon generation were 260–280 kJ/mol and 300–330 kJ/mol, respectively, indicating that each instance of hydrocarbon generation required higher temperature or deeper burial than the previous instance. Locations with secondary or tertiary hydrocarbon generation from C-P coaly source rocks were interpreted as potential oil and gas exploration regions.

Accumulation Conditions of Hydrocarbon Generated by Marine Source Rock in Southern Depression of Southern Yellow Sea Basin

2012 ◽  
Vol 616-618 ◽  
pp. 26-31
Author(s):  
Ming Jian Wang ◽  
Xun Hua Zhang
Keyword(s):  
Source Rock ◽  
Yellow Sea ◽  
Oil And Gas ◽  
Lower Triassic ◽  
Hydrocarbon Generation ◽  
Southern Yellow Sea ◽  
Hydrocarbon Accumulation ◽  
Accumulation Pattern ◽  
Marine Strata ◽  
Lower Palaeozoic

The energy situation of China has been very tough. Our country’s oil is heavily dependent on imports and lack of oil and gas reserve. The shortage of oil and gas resource has become an important factor which restricts our national economy health and sustainable development. Guided by the theory of petroleum system, we analyzed the Mesozoic-Palaeozoic marine strata hydrocarbon accumulation elements and conditions of the sourthern depression in Southern Yellow Sea Basin and concluded the hydrocarbon accumulation pattern in order to find the reserving oil and gas. There are seven source-reservoir-cap assemblages. Different tectonic units experienced different tectonic evolution history. The source rock of Lower Palaeozoic, Upper Palaeozoic and Lower Triassic have experienced four, three and two hydrocarbon generation stages separately in the depression. But the source rock of Lower Palaeozoic and Upper Palaeozoic in the salient have only experienced two and one hydrocarbon generation stages separately. Hydrocarbon generated by Mesozoic-Palaeozoic source rock migrated to the traps by fault, crack and unconformity. Lithologic trap, broad anticlinal trap and fault-lithologic trap are the main types in the study area. By the analysis of Mesozoic-Palaeozoic marine hydrocarbon accumulation in the sourthern depresssion, we concluded two accumulation patterns which are the original lithologic reservoir in the Mesozoic-Palaeozoic marine strata and fault-lithologic reservoir in the Mesozoic-Cenozoic terrestrial strata. These results will help to predict the oil and gas resources.

scholarly journals Petrographic evidence for hydrocarbon migration in Lower Cambrian sandstones, Bornholm, Denmark

1999 ◽  
Vol 45 ◽  
pp. 117-127 ◽  
Author(s):  
Lars Nicolai Nebel Møller ◽  
Henrik Friis
Keyword(s):  
Source Rock ◽  
Lower Cambrian ◽  
Hydrocarbon Generation ◽  
Reservoir Properties ◽  
Hydrocarbon Migration ◽  
Middle Cambrian ◽  
Alum Shale ◽  
Dark Colour ◽  
Quartz Cement ◽  
And Migration

The Lower Cambrian sandstones from Bornholm, and in particular the Hardeberga Sandstone, contain a substance that has been interpreted to be pyrobitumen which causes the dark colour seen at many outcrop localities. The presence of pyrobitumen indicates the former presence of hydrocarbons that migrated through the sandstones during the Mid Palaeozoic subsidence. In contrast to previous assumptions it is shown that even though the sandstones were extensively com-pacted, it had only very little cement, and consequently excellent reservoir quali-ties at the time of hydrocarbon generation and migration. The only known source rock is the Middle Cambrian Alum Shale that must have been down-faulted rela-tive to the lower Cambrian sandstones at the time of hydrocarbon generation. Quartz cement did not form until deep burial, and similar sandstones at locations outside the onshore Bornholm area that have not been so deeply buried may not have quartz cement and therefore still posses good reservoir properties.

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