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1.
林小兵  刘莉萍 《新疆地质》2007,25(2):183-186
充分利用能够反映储层及其含气特征的多种地震属性,结合已知钻井的测井、地质资料进行综合分析,以神经网络技术和属性降维处理为技术手段,估算储层参数及预测储层含气性的方法就是地震多属性分析技术.该技术的关键是储层的精细标定、层位准确追踪,以及沿层提取属性所开时窗的合理性.对孝泉-新场地区须家河组二段气藏的应用实例证实,该技术是运用叠后地震数据对"暗点"型气藏进行储层及其含气性预测的又一有效手段.  相似文献   

2.
林小兵  刘莉萍 《新疆地质》2007,25(2):183-186
充分利用能够反映储层及其含气特征的多种地震属性,结合已知钻井的测井、地质资料进行综合分析,以神经网络技术和属性降维处理为技术手段,估算储层参数及预测储层含气性的方法就是地震多属性分析技术.该技术的关键是储层的精细标定、层位准确追踪,以及沿层提取属性所开时窗的合理性.对孝泉-新场地区须家河组二段气藏的应用实例证实,该技术是运用叠后地震数据对“暗点”型气藏进行储层及其含气性预测的又一有效手段.  相似文献   

3.
地震属性分析在块碳酸盐岩储层研究中的应用   总被引:2,自引:0,他引:2  
马伯林 《安徽地质》2007,17(1):40-45
通过对也门1区块地层特征及电测资料的分析,从目的层段精细层位标定入手,确定属性提取的时窗大小,沿层提取1区块西北部盐上、盐下两套碳酸盐岩储集层地震属性.综合应用地震属性技术研究碳酸盐储层的剖面和平面分布特征,预测碳酸盐储层"孔-洞-缝"发育区.  相似文献   

4.
地震测井是求取地震波在地层中的传播速度的一种有效的方法,其主要用途是标定地震地质层位,判定终孔深度.该技术在龙家堡南部地区准确地标定了TY1、TY地震地质层位,确定了M12的终孔深度.  相似文献   

5.
寺河矿为一个千万吨级特大型现代化矿井,截止2006年底,矿井三维地震勘探面积已达51km^2,目前采掘范围为二盘区和三盘区,面积分别为6.8km^2和2.8km^2。对比三维地震解释成果与矿井采掘区域实际揭露地质异常,发现早期的常规解释技术手段,在山区复杂地震地质条件下,勘探效果较差,难以满足高产高效矿井生产要求。建议根据采掘得到的相关煤层底板标高、补充钻孔数据、构造及异常数据,利用最新解释技术,在原有地震资料解释技术的基础上,重新进行层位标定,重点利用地震方差体解释技术及属性分析,更好地解释断层、陷落柱等地质异常,进而提高解释精度。  相似文献   

6.
地震层位的标定是地震勘探构造解释的基础,合成地震记录与井旁道对比是层位标定的一个主要方法。层位标定精度除了受地震资料本身的质量及测井资料质量影响之外,制作合成地震记录的准确性取决于地震剖面极性、反射系数、平均速度、地震子波等关键因素的精度。通过介绍确定各种参数的关键技术,提出了在标定地震发射层位中采用的具体方法和标准,如利用相关系数对比时相关系数应大于0.6;利用平均速度对比确定的人工合成地震记录与实际剖面形态差异较小;时深调整前后测井曲线在形态上不应存在差异等。另外为提高对比精度,对目的层段时深关系进行调整时,应结合其他资料,如电性曲线、岩性剖面及钻井地质分层等信息,使之符合地质规律。  相似文献   

7.
地震反射层的地质层位是地震资料解释的基础,确定地震反射层的常用方法是利用声波测井资料,通过合成记录与反射层的标定。但声波测井的分辨率较高,地震记录的分辨率低,直接利用声波测井曲线制作合成记录,与实际地震记录进行层位标定常常不匹配。为提高层位标定的准确性,参考了多种测井曲线与岩性的对应关系,以及合成记录极性与岩性和层位的对应关系,在辽河盆地东部浅海地区实现了准确的层位划分。  相似文献   

8.
松辽盆地新肇地区G634-63井区三维地震精细构造解释   总被引:2,自引:0,他引:2  
开发地震精细构造解释的基本任务是三维地震资料解释与实钻结果进行交互分析验证,及时指导井位调整,提高钻遇储层的成功率。针对松辽盆地新肇地区G634—63井区开发地震地质任务要求,摸索出一套适合本区特点的技术组合,取得较好的地质效果。在应用解释系统中放大地震剖面、时间切片、椅式切片和三维可视化等常规解释功能的基础上,结合精细层位标定、层面解释分析技术、地震相干数据分析技术和高分辨率波阻抗反演等多种技术开展小断层的研究,避免了1m~2m薄储层断失;应用地质统计学方法进行动态时深转换,提高密集井网区构造解释精度;进行全三维的层面和断面成图,指导复杂条件的井位调整;总结出构造发育特征与储层有效厚度分布的关系。  相似文献   

9.
高精度合成地震记录制作方法及应用   总被引:5,自引:0,他引:5  
合成地震记录的精度直接影响到地震地质层位的准确标定。在总结前人工作的基础上,提出一套高精度合成地震记录的制作方法:(1)利用VSP资料能准确地反映地震波在地震中传播速度的变化规律的优点,进行漂移校正,以提高深-时转换的精度;(2)利用密度测井资料与声波时差曲线联合计算反射系数序列,以提高反射系数序列的精度;(3)利用分时窗提取子波技术,解决长期以来合成地震记录中存在的子波问题。将此方法用于合成地震记录的制作,在提高合成地震记录与地震剖面的吻合度和分辨率方面,都取得了较好的效果。  相似文献   

10.
井间地层对比是油气勘探开发的重要内容.由于测井资料的井间对比存在穿时问题,因此提出一种井震结合的等时地层对比方法.从岩心资料出发,利用岩心资料对测井资料进行刻度,并充分利用现代测井新技术,对测井资料进行岩相、沉积(微)相划分和层序地层分析.通过合成地震记录与层位标定,把单井分析结果标注到地震剖面上去,确定地震反射同相轴的地质意义.分别利用测井资料和地震资料确定岩相、沉积相以及层序地层特征,通过层位标定后,使得这些特征在剖面上和空间上达到一致来保证标定结果的准确性.在具有等时意义的地震强同相轴的控制下,参考约束地震反演剖面,根据高分辨率层序划分结果完成井间等时地层对比.这样的对比保证了井间对比的等时性,又确定了地震反射同相轴的地质意义,使测井、地震、地质三者紧密结合.这一方法对于建立正确的地层模型具有重要的指导意义.通过在胜坨油田某区块的实际应用,取得了良好的效果.  相似文献   

11.
以29口钻孔的重矿物百分含量数据来分析样本,通过Q型聚类分析、因子分析方法恢复不同物源体系的发育范围及其母岩类型,并以不同物源体系的边界范围为限定条件,结合ZTR指数及其等值线图,对珠江口盆地惠州凹陷M层物源特征进行了系统的研究。研究结果表明:研究区发育3大物源沉积区,分别为东北-北部物源沉积区、西北物源沉积区和东南物源沉积区,且各区重矿物组合特征明显,主次物源分明,整体表现为母岩类型复杂的特征。东北-北部沉积物主要母岩为酸性岩浆岩,次要母岩为变质岩和沉积岩,西北沉积物主要母岩为中性及基性岩浆岩,次要母岩为酸性岩浆岩和变质岩,东南沉积物主要母岩为中性及基性岩浆岩,次要母岩为变质岩。东北-北部物源区和西北物源区为远源沉积的产物,而东南物源区为近源沉积的产物。东北-北部物源区沉积物来自北方和东北方向,而西北物源区和东南物源区沉积物分别来自西北方向和东南方向。  相似文献   

12.
两种煤质分析指标的关联方程组研究   总被引:5,自引:0,他引:5  
在综合分析大量文献资料的基础上,采用多元线性回归方法,利用MATLAB对大量煤质分析结果进行了回归分析,推导出了煤质元素分析与工业分析的关联方程组。新方法实现了由工业分析结果求元素分析成分的目的,具有重大的实用意义。  相似文献   

13.
An algorithm andFortran-iv computer program,cabfac, forQ-mode factor analysis is described. The program will accept up to 1500 items and 50 variables on a moderate-size computer.  相似文献   

14.
In this paper, we report on the use of Bayesian networks, BNs, learnt from data generated by physical and numerical models, to overcome to a certain degree a number of complications in traditional slope stability analyses that jointly consider the mechanical and hydraulic properties of soils. Discrete Bayesian networks resulted to be useful and efficient to acquire knowledge from simulated data and to identify significant factors by the combined use of backward inference and global sensitivity analysis. Further, BNs enable decision thresholds to be estimated quickly. Along with this, backward inference and global sensitivity analysis are performed in BNs at low computation costs. Moreover, under conditions in which knowledge is scarce, we show how a practitioner can be better informed using the proposed approach. All these previously under-reported modelling features in the specialised literature encourage the further application of the proposed approach to enhance slope stability analysis.  相似文献   

15.
A piston core from the southern Blake Basin penetrated nine distinct bioclastic carbonate turbidites separated by pelagic terrigenous clay units. X-ray diffraction analysis of the carbonate mineralogy of the graded, laminated, and homogenous units of the individual turbidite units indicated a general loss of unstable carbonates in the homogenous unit beyond that contained in the lower two units. Univariate and multivariate statistical tests were employed to determine the significance of the changes and to determine if different units of a turbidite sequence could be consistently grouped by statistical methods. Principal components, discriminant function, and cluster analysis were used in the multivariate tests. The graded and laminated units were closely related in mineralogy with little significant differences. The mineralogy of the homogenous units was significantly different than that of the other two units except in one example. Cluster analysis generated five groupings of the samples with the end members consisting of graded and laminated units at one end and homogenous units at the other.  相似文献   

16.
以有限元结构矩阵分析为理论基础,结合应力应变测试和现场实际使用情况,利用计算机结构分析程序,对ZT-A系列三个不同高度钻塔的天梁、塔腿和绷绳做了结构应力分析,弄清了A形塔在承受垂直荷载、水平荷载以及偏载条件下,组成钻塔的各构件的荷载及应力分布;对钻塔设计提出了改进意见;并从整体角度分析了绷绳的作用;对在不同荷载条件下有无绷绳时钻塔的结构应力从量上做了对比;最后提出了应当如何布置提升系统才会使钻塔处  相似文献   

17.
正Shrimps of genus Artemia are the inhabitants of continental and marine waters with salinity of 70 to 350 g/l and above.Artemia is able to survive in the conditions in which other animals cannot exist.This is due to adaptations:effective osmoregulation system,the ability to synthesize of respiratory pigment(hemoglobin)and diapauses cysts(Litvinenko at.al.,2009).Cysts of this  相似文献   

18.
Finite element limit analysis with plane strain condition is employed to determine the upper and lower bound solutions of the undrained limiting pressure behind soil gaps and the lateral force acting on a pile per unit length in a contiguous pile wall. Computed bound solutions confirm serious limitations of existing studies in predicting these two solutions. Predicted failure mechanisms and the arching effect behind soil gaps are discussed. A closed-form equation of the limiting pressure factor is proposed for a convenient and accurate prediction of the lateral force acting on a pile in contiguous pile walls in practice.  相似文献   

19.
On the basis of samples taken from a known topographic surface, the parameters of two types of linear models are estimated. The first category is defined by polynomials or trigonometric functions, whose parameters are simultaneously computed from available data. In the second category a set of local centers is defined, and in the neighborhood of each center a fixed-degree polynomial is developed. An approximative resemblance index is calculated, and contour maps corresponding to various models are compared with the topographic map. It is found that with an increasing number of grid points, maps of local polynomials are converging both in continuity and in resemblance. For a sufficient number of grid points, this resemblance is always higher than those produced by models of the first category.  相似文献   

20.
A deformation mechanism is described and analyzed. It is intended for height patterns exposed to erosion and tectonic activity. A simulation experiment is carried out for this model. Closedform expressions are derived for the covariance field, the properties of spectral estimates, and for the optimal retrospective reconstruction of earlier, unknown height patterns. For obvious reasons the author is in no position to make claims about the verisimilitude of the model. It is offered as an example of a potential application to geology of the theory of patterns developed by the author and his coworkers in recent years. It is hoped that those more qualified than the author in the subject matter area can extend and modify the analysis to make it closer to geological reality. supported by NSF grant GJ-3100X.  相似文献   

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