The Experts below are selected from a list of 58929 Experts worldwide ranked by ideXlab platform
H U Junkun - One of the best experts on this subject based on the ideXlab platform.
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a new method for dynamic reserves evaluation of water drive Gas Reservoir
Natural Gas Geoscience, 2013Co-Authors: H U JunkunAbstract:Based on the research of calculation method for dynamic reserves of Gas Reservoir,combined with the seepage characteristic of water-drive Gas Reservoir,this paper establish a new method for calculating dynamic reserves in water-drive Gas Reservoir.For water-drive Gas Reservoir,the relationship between the relative permeability and the water content of Gas Reservoir is established firstly.Secondly use Gas-water relative permeability curve to determine the relationship between water saturation and Gas-water relative permeability ratio.On the basis of it,the relationship between water content and degree of reserves recovery of water-drive Gas Reservoir is established,according to which the relationship between cumulative water production and cumulative Gas production can be determined.The latter relationship is defined as water-drive characteristic relationship for a water-drive Gas Reservoir.According to the water-drive characteristic relationship,combined with production performance data,the water-drive characteristic curve can be established.The dynamic reserves of water-drive Gas Reservoir can be determined by using water-drive characteristic curve parameter.Finally,the case study verifies that the new method is accurate and practical.
Zhang Yuan-hui - One of the best experts on this subject based on the ideXlab platform.
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Studies on Water Invasion Mechanism of Fractured-watered Gas Reservoir
Natural Gas Geoscience, 2012Co-Authors: Zhang Yuan-huiAbstract:During the development of fractured and watered Gas Reservoir,production wells can be easily accessed by the edge water or bottom water along the fracture channel,and Gas-water flow is developed.This causes the increase of flow resistance,closure and separation of some Gas area,hence,the decrease of well production and recovery,which has great harm to Gas production.Based on the characteristics of the fractured and watered Gas Reservoir,a physical model of displacement of Gas by water is established.By means of water invasion seepage modeling experiment,the microscopic mechanism of water invasion about the Gas Reservoir is found.When the Gas Reservoir is watered,Gases are dominated by trapped Gas,cut Gas and water-locked Gas.Water invasion of Gas Reservoir can be macroscopically classified into water invasion of rocks with low permeability,water invasion of Gas Reservoir and "reverse water invasion" of well shutdown.It makes the Gas area separated and watered,and changes the mobile Gas into "dead Gas".Combined with the mechanism of water invasion of Gas Reservoir,the water invasion rules of K6 Gas well fracture system has been studied,which provided a sound basis for the development and adjustment of Gas Reservoirs.
Junrong Liu - One of the best experts on this subject based on the ideXlab platform.
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Impact of fracturing liquid absorption on the production and water-block unlocking for shale Gas Reservoir
Advances in Geo-Energy Research, 2018Co-Authors: Yinghao Shen, Xiuling Zhang, Long Chang, Dunqing Liu, Junrong LiuAbstract:A large amount of liquid is pumped into the shale Gas Reservoir during hydraulic fracturing, and the fluid flowback ratio is usually low. However, field experience showed that the liquids did not cause severe damage to shale Gas Reservoir. It is urgent to clarify the water block unlocking mechanism of a shale Gas Reservoir. This work is to discuss the water block unlocking mechanism in shale Gas Reservoir. Based on the characteristic study of shale Gas formation, the fracturing fluid absorption mechanism, absorption ability and impact on shale Gas formation damage are systematically studied. Study shows that ultra-low water saturation, abundant micro- to nano- tubulars and a huge contact area are the control factors for strong fluid absorption ability of Gas-shale. The strong water absorption capacity of the shale Gas formation matrix is a key factor in removing water block. Organic matter also has an important influence on absorption ability and Gas production. A conceptual evaluation criterion for water block unlocking is proposed based on core absorption capacity, original water saturation and fracture density. The shut-in after hydraulic fracturing is beneficial to Gas production and can reduce water production for certain shale Gas Reservoir. Cited as : Shen, Y., Ge, H., Zhang, X., Chang, L., Liu, D., Liu, J. Impact of fracturing liquid absorption on the production and water-block unlocking for shale Gas Reservoir. Advances in Geo-Energy Research, 2018, 2(2): 163-172, doi: 10.26804/ager.2018.02.05.
Yurui Zhang - One of the best experts on this subject based on the ideXlab platform.
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Gas Reservoir EVALUATION FOR UNDERBALANCED HORIZONTAL DRILLING by
2016Co-Authors: Yingfeng Meng, Na Wei, Guilin Xiao, Yurui ZhangAbstract:A set of surface equipment for monitoring the parameters of fluid and pressure while drilling was developed, and mathematical models for Gas Reservoir seepage and wellbore two-phase flow were established. Based on drilling operation pa-rameters, well structure and monitored parameters, the wellbore pressure and the Gas Reservoir permeability could be predicted theoretically for underbalanced horizontal drilling. Based on the monitored Gas production along the well depth, the Gas Reservoir type could be identified. Key words: underbalanced drilling, horizontal well, surface monitoring, permeability evaluation, media typ
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Gas Reservoir evaluation for underbalanced horizontal drilling
Thermal Science, 2014Co-Authors: Yingfeng Meng, Na Wei, Guilin Xiao, Yurui ZhangAbstract:A set of surface equipment for monitoring the parameters of fluid and pressure while drilling was developed, and mathematical models for Gas Reservoir seepage and wellbore two-phase flow were established. Based on drilling operation parameters, well structure and monitored parameters, the wellbore pressure and the Gas Reservoir permeability could be predicted theoretically for underbalanced horizontal drilling. Based on the monitored Gas production along the well depth, the Gas Reservoir type could be identified.
Changbo Zhai - One of the best experts on this subject based on the ideXlab platform.
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Formation time of Gas Reservoir constrained by the time-accumulation effect of 4He: Case study of the Puguang Gas Reservoir
Chemical Geology, 2017Co-Authors: Wenhui Liu, Tao Cheng, Tenger Borjigin, Jie Wang, Yang Huamin, Wang Ping, Houyong Luo, Changbo ZhaiAbstract:Abstract A physical model was developed to quantify 4 He accumulation in Gas Reservoirs. Both radiogenic 4 He from external crustal flux and in situ 4 He production were calculated with this model. Considering the time-accumulation effect of 4 He, the formation time of a Gas Reservoir can be estimated. The proposed method was applied to Puguang Gas Reservoir in southwest China's Sichuan Basin, the formation time of which was estimated as 32.5 Ma, which corresponds to the Oligocene epoch and to the mid-Himalayan movement, and which is consistent with Gas formation and accumulation history. This result indicates that the proposed model based on 4 He accumulation can be a useful tool for studying the formation time of Gas Reservoirs.
