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Shu Jiang - One of the best experts on this subject based on the ideXlab platform.
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accumulation mechanism of marine shale gas reservoir in anticlines a case study of the southern sichuan basin and xiuwu basin in the yangtze region
Geofluids, 2019Co-Authors: Yan Song, Zhenxue Jiang, Yizhou Huang, Shu Jiang, Xin Li, Pengfei Wang, Changan ShanAbstract:The study of tectonics is one of the important aspects of shale gas preservation. It is vital for understanding how to determine the enrichment regularity of marine shale gas in anticlines. This paper focuses on typical shale blocks in the southern Sichuan Basin and shale in the Upper Ordovician and the Lower Silurian. In this study, triaxial unloading tests, permeability tests perpendicular and parallel to the stratification plane, FIB-HIM tests, and inclusion analyses are carried out with real drilling data. The enrichment regularity of marine shale gas in anticlines is studied by considering 2 aspects: the angle of the limbs and the burial depth. For anticlines with adjacent synclines, the Migration regularity of shale gas is considered by 3 aspects: the dynamics, Channels, and processes of Migration. This study reveals that a limb angle greater than 120° reflects relatively good conditions for shale gas preservation, while limb angles lesser than 70° indicate relatively poor conditions. This study also suggests that during the process of uplift, large-scale concentrated fractures will form at a certain depth range and horizontal stress field, resulting in the large loss of shale gas. The regression equation of the fractured depth ( ) and the horizontal stress ( ) is presented as (with a correlation coefficient ). The stratification plane and the organic pores form the Migration Channel of natural gas that is horizontal to the stratification plane in shale. Under the condition of both anticlines and contiguous synclines, shale gas escapes through fractures resulting from extrusion along the anticline and the uplift effect. In addition, driven by differences in the formation pressure coefficients, shale gas is capable of migrating in a short-distance stair-type style from synclines to the adjacent anticlines. Thus, if the drilling costs allow, the well locations should be placed in the more deeply buried synclines.
Changan Shan - One of the best experts on this subject based on the ideXlab platform.
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accumulation mechanism of marine shale gas reservoir in anticlines a case study of the southern sichuan basin and xiuwu basin in the yangtze region
Geofluids, 2019Co-Authors: Yan Song, Zhenxue Jiang, Yizhou Huang, Shu Jiang, Xin Li, Pengfei Wang, Changan ShanAbstract:The study of tectonics is one of the important aspects of shale gas preservation. It is vital for understanding how to determine the enrichment regularity of marine shale gas in anticlines. This paper focuses on typical shale blocks in the southern Sichuan Basin and shale in the Upper Ordovician and the Lower Silurian. In this study, triaxial unloading tests, permeability tests perpendicular and parallel to the stratification plane, FIB-HIM tests, and inclusion analyses are carried out with real drilling data. The enrichment regularity of marine shale gas in anticlines is studied by considering 2 aspects: the angle of the limbs and the burial depth. For anticlines with adjacent synclines, the Migration regularity of shale gas is considered by 3 aspects: the dynamics, Channels, and processes of Migration. This study reveals that a limb angle greater than 120° reflects relatively good conditions for shale gas preservation, while limb angles lesser than 70° indicate relatively poor conditions. This study also suggests that during the process of uplift, large-scale concentrated fractures will form at a certain depth range and horizontal stress field, resulting in the large loss of shale gas. The regression equation of the fractured depth ( ) and the horizontal stress ( ) is presented as (with a correlation coefficient ). The stratification plane and the organic pores form the Migration Channel of natural gas that is horizontal to the stratification plane in shale. Under the condition of both anticlines and contiguous synclines, shale gas escapes through fractures resulting from extrusion along the anticline and the uplift effect. In addition, driven by differences in the formation pressure coefficients, shale gas is capable of migrating in a short-distance stair-type style from synclines to the adjacent anticlines. Thus, if the drilling costs allow, the well locations should be placed in the more deeply buried synclines.
Yan Song - One of the best experts on this subject based on the ideXlab platform.
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accumulation mechanism of marine shale gas reservoir in anticlines a case study of the southern sichuan basin and xiuwu basin in the yangtze region
Geofluids, 2019Co-Authors: Yan Song, Zhenxue Jiang, Yizhou Huang, Shu Jiang, Xin Li, Pengfei Wang, Changan ShanAbstract:The study of tectonics is one of the important aspects of shale gas preservation. It is vital for understanding how to determine the enrichment regularity of marine shale gas in anticlines. This paper focuses on typical shale blocks in the southern Sichuan Basin and shale in the Upper Ordovician and the Lower Silurian. In this study, triaxial unloading tests, permeability tests perpendicular and parallel to the stratification plane, FIB-HIM tests, and inclusion analyses are carried out with real drilling data. The enrichment regularity of marine shale gas in anticlines is studied by considering 2 aspects: the angle of the limbs and the burial depth. For anticlines with adjacent synclines, the Migration regularity of shale gas is considered by 3 aspects: the dynamics, Channels, and processes of Migration. This study reveals that a limb angle greater than 120° reflects relatively good conditions for shale gas preservation, while limb angles lesser than 70° indicate relatively poor conditions. This study also suggests that during the process of uplift, large-scale concentrated fractures will form at a certain depth range and horizontal stress field, resulting in the large loss of shale gas. The regression equation of the fractured depth ( ) and the horizontal stress ( ) is presented as (with a correlation coefficient ). The stratification plane and the organic pores form the Migration Channel of natural gas that is horizontal to the stratification plane in shale. Under the condition of both anticlines and contiguous synclines, shale gas escapes through fractures resulting from extrusion along the anticline and the uplift effect. In addition, driven by differences in the formation pressure coefficients, shale gas is capable of migrating in a short-distance stair-type style from synclines to the adjacent anticlines. Thus, if the drilling costs allow, the well locations should be placed in the more deeply buried synclines.
Nikolay K Vitanov - One of the best experts on this subject based on the ideXlab platform.
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On the Mathematical Theory of Human Migration: Model of a Migration Channel with a Secondary and a Tertiary Arm
arXiv: Physics and Society, 2019Co-Authors: Roumen Borisov, Nikolay K VitanovAbstract:We study the motion of substance in a finite Channel that belongs to a network. The Channel splits to two arms in a node of the network. There is an additional split of the secondary arm. We obtain analytical relationships for the distribution of the substance in the nodes of the Channel for the case of stationary regime of the motion of the substance in the arms of the Channel. The obtained results are discussed from the point of view of application of the model to Migration dynamics: model of motion of migrants in a Channel consisting of chains of countries with different probabilities for obtaining permission to stay for the migrants in the different countries of the Channel
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A Model of a Motion of Substance in a Channel of a Network
Journal of Theoretical and Applied Mechanics, 2018Co-Authors: Nikolay K Vitanov, Roumen BorisovAbstract:We consider a flow of substance through finite-size Channels consisting of chains of nodes connected by edges. The nodes of the Channels are connected to the nodes of another network: each node of the Channel is connected to only one node of the network. We can think about such a situation as logistic Channel consisting of stoting facilities that are connected to a city from a network of cities. The following processes can be observed in a node of the Migration Channel: exchange (inflow and outflow) of substance with the previous node of the Channel; exchange (outflow and inflow) of substance with the next node of the Channel; exchange (inflow and outflow) of substance with the environment; "leakages": exchange (outflow and inflow) of substance with the correspndent node of the network that is coupled to the chain of nodes of the Channel. We discuss statistical distributions of the substance in the nodes of the studied Channel. Studied model has numerous applications, e.g, in Migration Channels, in sceintometrics, in logistics, etc. [1],[2]. References [1] Vitanov, N. K., Vitanov, K. N. Box model of Migration Channels. Mathematical Social Sciences 2016; 80: 108 -- 114. [2] Vitanov, N. K. Science dynamics and research production. Indicators, indexes, statistical laws and mathematical models. Springer International, 2016.
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Discrete-time model for a substance motion in a Channel of a network. Application to a human Migration Channel
arXiv: Physics and Society, 2018Co-Authors: Nikolay K Vitanov, Kaloyan N VitanovAbstract:We discuss a discrete-time model for motion of substance in a Channel of a network. For the case of stationary motion of the substance and for the case of time-independent values of the parameters of the model we obtain a new class of statistical distributions that describe the distribution of the substance along the nodes of the Channel. The case of interaction between a kind of substance specific for a node of the network and another kind of substance that is leaked from the Channel is studied in presence of possibility for conversion between the two substances. Several scenarios connected to the dynamics of the two kinds of substances are described. The studied models: (i) model of motion of substance through a Channel of a network, and (ii) model of interaction between two kinds of substances in a network node connected to the Channel, are discussed from the point of view of human Migration dynamics and interaction between the population of migrants and the native population of a country.
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on the motion of substance in a Channel of a network and human Migration
Physica A-statistical Mechanics and Its Applications, 2018Co-Authors: Nikolay K Vitanov, Kaloyan N VitanovAbstract:Abstract We model the motion of a substance in a Channel of a network that consists of chain of (i) nodes of the network and (ii) edges that connect the nodes and form the way for motion of the substance. The nodes of the Channel can have different “leakage”, i.e., some amount of the substance can leave the Channel at a node and the rate of leaving can be different for the different nodes of the Channel. The nodes close to the end of the Channel for some (design or other) reason may be more “attractive” for the substance in comparison to the nodes around the incoming node of the Channel. We discuss Channels containing infinite or finite number of nodes. The main outcome of the model is the distribution of the substance along the nodes. Two regimes of functioning of the Channels are studied: stationary regime and non-stationary regime. The distribution of the substance along the nodes of the Channel for the case of stationary regime is a distribution with a very long tail that contains as particular case the Waring distribution (for Channel with infinite number of nodes) or the truncated Waring distribution (for Channel with finite number of nodes). In the non-stationary regime of functioning of the Channel one observes an exponential increase or exponential decrease of the amount of substance in the nodes. However the asymptotic distribution of the substance among the nodes of the Channel in this regime remains stationary. The studied model is applied to the case of Migration of humans through a Migration Channel consisting of chain of countries. In this case the model accounts for the number of migrants entering the Channel through the first country of the Channel; permeability of the borders between the countries; possible large attractiveness of some countries of the Channel; possibility for migrants to obtain permission to reside in a country of the Channel. The main outcome of the model is the distribution of migrants along the countries of the Channel. We discuss the conditions for concentration of migrants in selected country of the Channel. Finally two scenarios of changes of conditions of the functioning of the Channel are discussed. It is shown that from the point of view of decreasing of the number of migrants in the countries of the Channel it is more effective to concentrate efforts on preventing the entrance of migrants in the first country of the Channel when compared to concentration of efforts on decrease of permeability of the borders between the countries of the Channel.
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box model of Migration Channels
Mathematical Social Sciences, 2016Co-Authors: Nikolay K Vitanov, Kaloyan N VitanovAbstract:We discuss a mathematical model of Migration Channel based on the truncated Waring distribution. The truncated Waring distribution is obtained for a more general model of motion of substance through a Channel containing finite number of boxes. The model is applied then for case of migrants moving through a Channel consisting of finite number of countries or cities. The number of migrants in the Channel strongly depends on the number of migrants that enter the Channel through the country of entrance. It is shown that if the final destination country is very popular then large percentage of migrants may concentrate there.
Zhenxue Jiang - One of the best experts on this subject based on the ideXlab platform.
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accumulation mechanism of marine shale gas reservoir in anticlines a case study of the southern sichuan basin and xiuwu basin in the yangtze region
Geofluids, 2019Co-Authors: Yan Song, Zhenxue Jiang, Yizhou Huang, Shu Jiang, Xin Li, Pengfei Wang, Changan ShanAbstract:The study of tectonics is one of the important aspects of shale gas preservation. It is vital for understanding how to determine the enrichment regularity of marine shale gas in anticlines. This paper focuses on typical shale blocks in the southern Sichuan Basin and shale in the Upper Ordovician and the Lower Silurian. In this study, triaxial unloading tests, permeability tests perpendicular and parallel to the stratification plane, FIB-HIM tests, and inclusion analyses are carried out with real drilling data. The enrichment regularity of marine shale gas in anticlines is studied by considering 2 aspects: the angle of the limbs and the burial depth. For anticlines with adjacent synclines, the Migration regularity of shale gas is considered by 3 aspects: the dynamics, Channels, and processes of Migration. This study reveals that a limb angle greater than 120° reflects relatively good conditions for shale gas preservation, while limb angles lesser than 70° indicate relatively poor conditions. This study also suggests that during the process of uplift, large-scale concentrated fractures will form at a certain depth range and horizontal stress field, resulting in the large loss of shale gas. The regression equation of the fractured depth ( ) and the horizontal stress ( ) is presented as (with a correlation coefficient ). The stratification plane and the organic pores form the Migration Channel of natural gas that is horizontal to the stratification plane in shale. Under the condition of both anticlines and contiguous synclines, shale gas escapes through fractures resulting from extrusion along the anticline and the uplift effect. In addition, driven by differences in the formation pressure coefficients, shale gas is capable of migrating in a short-distance stair-type style from synclines to the adjacent anticlines. Thus, if the drilling costs allow, the well locations should be placed in the more deeply buried synclines.