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porosity values
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  孔隙度
    However,these discrete porosity values can not delineate the local variation of reservoir porosity.
    但这些离散分布的孔隙度值,不能反映岩层孔隙度的局部变化。
短句来源
    Meanwhile,the models of the correlation between the porosity,density and interval transit time have been set up,and according to the models of the correlation,the porosity values of the pore developed dolomite may be determined.
    同时,建立了孔隙度与密度、声波时差的相关性模型,根据它们之间的相关性,可以确定云岩孔隙发育中的孔隙度值。
短句来源
    From this study, it is found that the porosity values from the 5 approaches is in a sequence from high to low like this: absolute porosity from physical test>opening porosity from helium instrument > the porosity from SEM >effective porosity from mercury injection>the porosity from thin section.
    5种孔隙度数值从大到小依次是:绝对孔隙度(物理实验法)>开孔隙度(氦孔隙仪)>SEM孔隙度>有效孔隙度(压汞仪)>薄片孔隙度
短句来源
    In C/O logging, CI and CIM2 curves represent the porosity values. Porosities of reservoirs in middle or later oilfield developments can be computed accurately after the C/O logging curves are calibrated by the core data. This method solved the problems arising from the time deference while computing porosity with the open-hole logging information and has acquired a better field application.
    碳氧比测井资料中CI、CIM 2资料反映了储层孔隙度的变化 ,利用岩心分析资料标定碳氧比测井资料可以较为精确求取开发中后期储层孔隙度 ,该方法解决了利用裸眼井资料确定孔隙度时由于时间差带来的问题 ,在实际工作中得到较好的应用效果。
短句来源
    For example,recent studies show that porosity values can be off as much as 6 p.
    研究表明,由于视倾角误差,孔隙度值偏差可达6 p.
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  porosity values
The two methods give similar porosity values between 0.3% and 10%.
      
The porosity values estimated by the NDT methods have been confirmed by destructive testing, which included metallography and vacuum volumetric measurement using nitrogen absorption.
      
Minimum porosity values of 2.1%, 3.7%, and 5.3%, respectively, were obtained for the JP-5000, the DJ-2700, and the Axial III guns.
      
The numerical results indicate that as the reactant porosity values are decreased, the combustion velocity first increases because of an increase in the thermal conductivity.
      
In static compression, for comparable compositions and moisture content the same porosity values are attained for mixtures with a clay addition at pressures 3-4-fold lower than those required for mixtures without clay.
      
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Porosity is one of the important parameters for evaluating hydro- carbon reservoir,it can be determined by making core analysis,logg- ing,mathematical model,etc.However,these discrete porosity values can not delineate the local variation of reservoir porosity.Practice proves the feasibility of calculating the porosity of fluid-filled sand- stone by Wyllie formula.On the basis of seismic interval velocities, the porosities along seismic lines can be determined using Wyllie for- mula integrated...

Porosity is one of the important parameters for evaluating hydro- carbon reservoir,it can be determined by making core analysis,logg- ing,mathematical model,etc.However,these discrete porosity values can not delineate the local variation of reservoir porosity.Practice proves the feasibility of calculating the porosity of fluid-filled sand- stone by Wyllie formula.On the basis of seismic interval velocities, the porosities along seismic lines can be determined using Wyllie for- mula integrated with a modification formula which copes with poro- sity deviation due to mud-filled pores;thus areal porosity variation can be mapped.The examples in the paper demonstrate the effective- ness of the method described in this paper.

孔隙度是评价油气田的重要参数之一,可通过取芯、测井或数学模型等方法获得。但这些离散分布的孔隙度值,不能反映岩层孔隙度的局部变化。实践证明,用 Wyllie 公式计算合流体砂岩的孔隙度是行之有效的方法。根据地震层速度资料,利用 Wyllie 公式结合对孔隙被泥质充填所引起孔隙度变化的修正,便可获得沿地震测线各点的孔隙度值,作出孔隙度区域变化图。文中实例表明,本文提出的方法是有效的。

In accordance with the geological properties of the Carboniferous reservoir in East Sichuan,it can be divided into three parts as the limestone,pore developed dolomite and pore undeveloped dolomite according to its reservoir properties.Through exploration,it is proved that the fracture developed dolomite with high porosity may be mainly taken as the reservoir,therefore,to recognize the fracture developed intervals with high porosity becomes an important aspect of reservoir evaluation.Owing to the fact that...

In accordance with the geological properties of the Carboniferous reservoir in East Sichuan,it can be divided into three parts as the limestone,pore developed dolomite and pore undeveloped dolomite according to its reservoir properties.Through exploration,it is proved that the fracture developed dolomite with high porosity may be mainly taken as the reservoir,therefore,to recognize the fracture developed intervals with high porosity becomes an important aspect of reservoir evaluation.Owing to the fact that the vertical variations in lithological and petrophysical properties may be relatively accurately reflected by log data,the log eigen values of six conventional logging suites for various lithological properties or the same lithology with various petrophysical properties of the Carboniferous in East Sichuan are obtained by use of the geological and log data comprehensively,and through the inversion of the log eigen values obtained,it is proved that they are authentic.In the light of the log eigen values,the pore developed dolomite,pore undeveloped dolomite and limestone in the Carboniferous reservoir can be divided and the fluid bearing situation in the pores of rocks can also be judged.Meanwhile,the models of the correlation between the porosity,density and interval transit time have been set up,and according to the models of the correlation,the porosity values of the pore developed dolomite may be determined.When the log eigen values mentioned above are used for seismic data processing,the lithological and petrophysical variations in the Carboniferous may be forecasted,then the lithological trap can be fixed.

根据川东石炭系储层的地质特点,将川东石炭系储层按储集性能划分为石灰岩、孔隙发育白云岩、孔隙不发育白云岩三部分。经勘探实践证实,可作为储层的主要是孔隙度高、裂缝发育的白云岩,因此识别石炭系储层中孔隙高、裂缝发育的层段就成为储层评价的一个重要方面。由于测井资料在纵向上可以较准确地反映岩石岩性及物性的差异,故我们综合利用地质、测井资料获取了川东石炭系不同岩性或同一岩性不同物性的六个常规测井系列的测井特征值,并对所获得的测井特征值进行反演,证实了该测井特征值是成立的。应用此测井特征值可以将石炭系储层中的孔隙发育白云岩、孔隙不发育白云岩和石灰岩区分开,并且可以判别岩石孔隙中的含流体情况。同时,建立了孔隙度与密度、声波时差的相关性模型,根据它们之间的相关性,可以确定云岩孔隙发育中的孔隙度值。将文中所述测井特征值应用到地震处理中,可以预测石炭系的岩性及物性变化,进而可以确定岩性圈闭

By using the observed data of porosity, P- and S-wave velocity from 46 wells in an area, we estab-lish a linear formula on the relation between porosity and P- and S-wave velocity. Thus, the porosities can be predicted by use of P- and S-wave velocities rather than any other parameters, and the precision is obviously higher than the prediction precision of Wyllie formula. But the porosities predicted by the lin-ear formla have the averaging phenomenon. The observed data from 46 wells have been used for the neural...

By using the observed data of porosity, P- and S-wave velocity from 46 wells in an area, we estab-lish a linear formula on the relation between porosity and P- and S-wave velocity. Thus, the porosities can be predicted by use of P- and S-wave velocities rather than any other parameters, and the precision is obviously higher than the prediction precision of Wyllie formula. But the porosities predicted by the lin-ear formla have the averaging phenomenon. The observed data from 46 wells have been used for the neural network to leam. Then the neural network is used to perform function approximation. So the nonlinear formula on the relation between porosity and P- and S-wave velocity in the area has been built.The nonlinear formula is clearly more approximate to the observed data. Therefore the precision is im-proved, and the arveraging phenomenon of the predicted porosity values is eliminated.

本文用某地区46口井的实测孔隙度、纵横波速度资料,建立了该地区孔隙度与纵横波速度关系的线性公式。由此,仅用纵横波速度便可预测孔隙度而不需要任何其它参数,并且精度明显高于wyllie公式的预测精度;但此线性公式预测的孔隙度有平均化现象。以46口井实测资料供神经网络学习,用神经网络作函数逼近,由此建立了该地区孔隙度与纵横波速度关系的非线性公式,非线性公式明显地更逼近于实测数据,提高了精度、并消除了孔隙度预测值的平均化现象。

 
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