The Experts below are selected from a list of 9 Experts worldwide ranked by ideXlab platform
Wei Wen-wen - One of the best experts on this subject based on the ideXlab platform.
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Porosity Cutoff of Porosity-permeability curve and the reservoir quality
Journal of Chengdu University of Technology, 2011Co-Authors: Wei Wen-wenAbstract:The Porosity Cutoff is critical Porosity for a required permeability which is commonly obtained from a Porosity-permeability plot.It also indicates the sedimentary and diagenetic factors characters,such as reservoir rocks structure(the content of matrix or mud,particle size and sorting),composition of authigenic mineral(such as the content of authigenic minerals as the pore-lining presence),dolomite content and reservoir pore structure(interparticle,intercrystalline,intraparticle,moldic,macropores,mesopores and micropores,etc.) and so on.The Porosity Cutoff of different oil layers of the Triassic Yanchang Formation in eastern Gansu of Ordos Basin changes between 7% to 12% at 0.1×10-3 μm2 permeability,which is mainly controlled by the meteoric action and secondary Porosity formation in the interval of Indosinian exposure.If 0.1×10-3 μm2 permeability is used as the lower limit of sandstone,that of the corresponding Porosity changes generally between 7%~12%,which will obviously affect the calculation of hydrocarbon reserves of different oil formations.The authigenic minerals mainly presenting in the form of pore-lining cement can protect Porosity space of buried sandstones,but the increasing content of these cements will lead to Porosity Cutoff increasing,the reservoir quality is worse than that with similar Porosity but lack of pore-lining cement.Porosity Cutoffs show significant variability among the different pore types of carbonate reservoirs,ranging from 5.4% to 31.3% at 1×10-3 μm2 permeability.The carbonate reservoir mainly consist of intercrystalline and intraparticle pores has minimum Porosity Cutoff and better reservoir quality.The carbonate reservoir mainly consists of mudstone micropores has maximum Porosity Cutoff and worst reservoir quality.The carbonate reservoir mainly consists of intraparticle and moldic has medium Porosity Cutoff and reservoir quality.
Cui Zhilin - One of the best experts on this subject based on the ideXlab platform.
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the methods for determination of Cutoff values of reservoir Porosity and permeability
Xinjiang Petroleum Geology, 2010Co-Authors: Wang Juan, Liu Xuegang, Cui ZhilinAbstract:This paper presents four methods of empirical statistical analysis,throat radius cut off,relative permeability curve and gas test for effective determination of reservoir Porosity and permeability Cutoff values for the purpose of oil-gas reservoir identification and reserves estimation. These methods are applied to determination of Cutoffs of Porosity and permeability of the He-8 member,Shihezi formation in Wellblock-8 in a gas field in Ordos basin,showing that the Porosity Cutoff value is 6.25%,the permeability Cutoff value is 0.1×10-3 μm2.
Wang Juan - One of the best experts on this subject based on the ideXlab platform.
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the methods for determination of Cutoff values of reservoir Porosity and permeability
Xinjiang Petroleum Geology, 2010Co-Authors: Wang Juan, Liu Xuegang, Cui ZhilinAbstract:This paper presents four methods of empirical statistical analysis,throat radius cut off,relative permeability curve and gas test for effective determination of reservoir Porosity and permeability Cutoff values for the purpose of oil-gas reservoir identification and reserves estimation. These methods are applied to determination of Cutoffs of Porosity and permeability of the He-8 member,Shihezi formation in Wellblock-8 in a gas field in Ordos basin,showing that the Porosity Cutoff value is 6.25%,the permeability Cutoff value is 0.1×10-3 μm2.
Baraa Ziad Tariq - One of the best experts on this subject based on the ideXlab platform.
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Estimation of Cutoff Values by Using Regression Lines Method in Mishrif Reservoir/ Missan oil Fields
University of Baghdad, 2019Co-Authors: Mohammed Salih Al Jawad, Baraa Ziad TariqAbstract:Net pay is one of the most important parameters used in determining initial oil in place of a reservoir. It can be delineated through the using of limiting values of the petrophysical properties of the reservoir. Those limiting values are named as the Cutoff. This paper provides an insight into the application of regression line method in estimating Porosity, clay volume and water saturation Cutoff values in Mishrif reservoir/ Missan oil fields. The study included 29 wells distributed in seven oilfields of Halfaya, Buzurgan, Dujaila, Noor, Fauqi, Amara and Kumait. This study is carried out by applying two types of linear regressions: Least square and Reduce Major Axis Regression. The Mishrif formation was divided into three main units. They are MA, MB, and MC. The methods were applied to each unit of Mishrif formation individually and as one unit. The division of Mishrif formation into subunits led to a great improvement in the accuracy of the Porosity-permeability correlations. The Results indicated that the regression lines method of defining Cutoffs gives unrealistic values with the common assumption of permeability Cutoff = 0.1 md. Another assumption for permeability Cutoff = 1 is made and it was chosen due to lithology and hydrocarbon type which are limestone and oil respectively. This assumption led to more realistic and higher Porosity Cutoff and smaller water saturation and clay volume Cutoff values using the two types of regression lines
Liu Xuegang - One of the best experts on this subject based on the ideXlab platform.
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the methods for determination of Cutoff values of reservoir Porosity and permeability
Xinjiang Petroleum Geology, 2010Co-Authors: Wang Juan, Liu Xuegang, Cui ZhilinAbstract:This paper presents four methods of empirical statistical analysis,throat radius cut off,relative permeability curve and gas test for effective determination of reservoir Porosity and permeability Cutoff values for the purpose of oil-gas reservoir identification and reserves estimation. These methods are applied to determination of Cutoffs of Porosity and permeability of the He-8 member,Shihezi formation in Wellblock-8 in a gas field in Ordos basin,showing that the Porosity Cutoff value is 6.25%,the permeability Cutoff value is 0.1×10-3 μm2.