基于测井参数宏观煤岩类型预测及三维地质建模

为实现定量判别宏观煤岩类型分布特征,依据煤层气参数井煤岩描述结果,利用不同宏观煤岩类型在测井响应特征的差异性,建立宏观煤岩类型指数(HMLZ)。通过该判别方法完成SZB区块30口井宏观煤岩类型定量识别及验证,进一步采用随机建模方法实现宏观煤岩类型空间分布特征的三维可视化。结果表明HMLZ>20.0为光亮煤;10.0相似文献   

海域孔隙型储层天然气水合物赋存模式定量化表征：声波和电阻率测井的约束

海域孔隙型天然气水合物储层中,水合物主要以颗粒胶结、包裹胶结、骨架支撑、孔隙悬浮4种赋存模式充填沉积物孔隙,水合物饱和度与赋存模式的不同导致了储层弹性和电性的差异,利用声波和电阻率测井资料联合处理可以进行水合物赋存模式的定量表征。首先利用Simandoux公式计算水合物饱和度,然后通过有效介质模型构建的岩石物理模板识别水合物赋存模式,最后计算储层中不同赋存模式水合物的相对占比。以全球范围内三个典型区域(中国南海神狐海域、北美Blake海台、新西兰Hikurangi边缘)为例,利用水合物储层的实际钻探资料,对水合物赋存模式进行定量分析：(1)中国南海神狐海域SH2站位储层中,水合物主要以骨架支撑模式产出,约占水合物总量的64%;(2)Blake海台994C站位储层中,水合物主要为颗粒胶结和包裹胶结模式,分别占总量的27%和51%;(3)Hikurangi边缘U1518B站位的水合物储层中,水合物主要为包裹胶结和骨架支撑模式,分别占总量的32%和47%。前人针对水合物形成和赋存模式的实验研究显示,水合物更易以颗粒胶结、包裹胶结和骨架支撑模式赋存,从侧面验证了上述分析结果的可靠性。本研究使用...     

Research Progress on the Electrical Properties of Gas Hydrate-bearing Sediments

Electrical properties are important physical parameters of natural gas hydrate, and, specifically, resistivity has been widely used in the quantitative estimation of hydrate saturation. There are three main methods to study the electrical properties of gas hydrate-bearing sediments: experimental laboratory measurements, numerical simulation, and resistivity logging. Experimental measurements can be divided into three categories: normal electrical measurement, complex resistivity measurement, and electrical resistivity tomography. Experimental measurements show that the resistivity of hydrate-bearing sediment is affected by many factors, and its distribution as well as the hydrate saturation is not uniform; there is a distinct non-Archie phenomenon. The numerical method can simulate the resistivity of sediments by changing the hydrate occurrence state, saturation, distribution, etc. However, it needs to be combined with X-ray CT, nuclear magnetic resonance, and other imaging techniques to characterize the porous characteristics of the hydrate-bearing sediments. Resistivity well logging can easily identify hydrate layers based on their significantly higher resistivity than the background, but the field data of the hydrate layer also has a serious non-Archie phenomenon. Therefore, more experimental measurements and numerical simulation studies are needed to correct the parameters of Archie''s formula.     

准噶尔盆地中部地区钻头优选技术应用研究

岩石可钻性是决定钻井效率的基本因素,反映了钻进时岩石破碎的难易程度,是合理选择钻进方式、钻头类型和设计钻进参数的依据。基于地层岩石可钻性的计算方法,结合实钻井的测井资料分析,建立了准噶尔盆地中部区块地层岩石可钻性剖面,并以此为依据推荐了适用于不同地层的钻头类型,现场应用结果表明,所用钻头具有很好的适用性,能够进一步提高准噶尔盆地中部地区的机械钻速,对于该地区的后续钻井钻头类型的选择具有重要的指导意义。     

数字测井在福建清流马地煤田勘查中的应用

清流马地煤矿的勘查实例,说明综合数字测井在煤田勘查中能显示煤层分布状况,可有效地对煤层与围岩进行分层,解决地质问题直观,效果较好。     

物探在隧道工程勘察中的应用

简要介绍在复杂的地质地形条件下,隧道工程建设中物探勘察方法的选择及浅层地震、电法、声波测井等物探方法的应用和注意事项,为今后隧道工程建设中的物探勘察应用提供参考。     

VSP测井在大型陆相沉积煤田勘探中应用效果

在我国煤炭资源中,中生代陆相煤田所蕴藏的煤炭资源占有重要地位,尤其是早—中侏罗纪陆相煤田,已探明煤炭资源总量占我国探明煤炭资源总量的63%,煤田规模大都为大—超大型,煤质优良。该类煤田沉积环境复杂,具有煤层层数多、厚度变化大、煤层稳定性和连续性差、合并及分叉点多,勘探难度较大。为此,在鄂尔多斯市东胜区西部勘探项目中采用了包括钻探、二维地震、综合测井、VSP测井、地质与水文工程地质填图等在内的综合勘探手段,取得了良好的地质效果,其中VSP测井在该勘探区的应用,不但准确提取了二维地震资料的时～深关系,提高了时—深转换精度,而且使声波测井资料得到了有效校正,地震带井约束波阻抗反演技术处理更合理,解释结果更可靠。综合利用VSP和声波测井资料进行交互速度分析,提高了地震资料对目的层的解释精度,为大型陆相沉积煤田的岩煤层对比解释提供了丰富的地质信息。     

Array processing-a new method to detect and correct errors on array resistivity logging tool measurements

In recent years more and more multi-array logging tools, such as the array induction and the array lateralog, are applied in place of conventional logging tools resulting in increased resolution, better radial and vertical sounding capability and other features. Multi-array logging tools acquire several times more individual measurements than conventional logging tools. In addition to new information contained in these data, there is a certain redundancy among the measurements. The sum of the measurements actu- ally composes a large matrix. Providing the measurements are error-free, the elements of this matrix show certain consistencies. Taking advantage of these consistencies, an innovative method is developed to de- tect and correct errors in the array resistivity logging tool raw measurements, and evaluate the quality of the data. The method can be described in several steps. First, data consistency patterns are identified based on the physics of the measurements. Second, the measurements are compared against the consis- tency patterns for error and bad data detection. Third, the erroneous data are eliminated and the measure- ments are re-constructed according to the consistency patterns. Finally, the data quality is evaluated by comparing the raw measurements with the re-constructed measurements. The method can be applied to all array type logging tools, such as array induction tool and array resistivity tool. This paper describes the method and illustrates its application with the High Definition Lateral Log (HDLL, Baker Atlas) instru- ment. To demonstrate the efficiency of the method, several field examples are shown and discussed.     

数字测井资料对矿区“三带、地层的解释及应用

利用数字测井资料对矿区工作面上覆地层的冒落带、裂隙带和弯曲沉降带进行系统的综合解释，确定其发育情况，对指导矿区的安全生产、开采范围的确定及开采煤柱留舍颇有益处。     

核磁测井数据弛豫谱反演软件研究

简单介绍了核磁测井数据弛豫谱反演方法原理 ,用混合编程方法和动态连接库技术 ,将用FORTRAN语言编写的核心处理模块转换为动态连接库 ,并在C++语言中动态调用。应用快速应用程序开发工具完成了图形用户界面的核磁测井数据处理软件设计。