共查询到18条相似文献，搜索用时 140 毫秒
1.
2.
3.
4.
利用地震属性技术研究岩溶裂隙发育带 总被引：2，自引：0，他引：2
利用地震属性技术,从三维地震数据体中提取对岩溶裂隙发育带相关的二维分形参数,预测岩溶裂隙发育带、奥灰顶部岩层的富水性以及有关的水文地质条件,为高产高效矿井地质保障系统提供依据。通过许厂煤矿430采区实际资料的检验,预测的地质效果良好。 相似文献
5.
6.
在常规测井约束反演的的基础上,开展神经网络特征参数反演,将波阻抗等地震属性转化为与含水性更为密切的孔隙度、视电阻率数据体,使地震反演的地质属性与测井上的地质属性达到最优的相关性,从而实现应用三维地震对煤层顶板富水进行评价的目的。由于煤层顶板富水区的特殊性质,它同样也是地震后的易破坏层,因而对它的探明从抗震角度以及震害预测角度都是有价值的。以淮北某采区为例,通过孔隙度及电阻率的神经网络反演对研究区10#煤层顶板的富水性进行预测。反演结果表明采区北部发育一个强富水陷落柱,与钻孔揭示结果吻合。采区西部10#煤层顶板与第四系含水层呈不整合接触关系,神经网络反演结果预测为强富水区,同样与井下工程揭示富水特征吻合。利用多属性融合的神经网络反演可有效预测煤层顶板的富水特征,为煤矿安全生产以及抗震提供重要保障。 相似文献
7.
塔北轮古东地区奥陶系碳酸盐岩储层类型多,地震响应特征多样,纵横向变化大,埋藏深,储集空间复杂和控制因素多,不易有效进行酸盐岩储层预测.针对塔北轮古东碳酸盐岩储层预测难点,利用岩石物理分析、AVO模型正演、AVO属性反演和叠前联合反演等技术,开展了奥陶系碳酸盐岩储层岩石物理响应特征研究,以便指导奥陶系碳酸盐岩储层预测.研究结果表明塔北轮古东奥陶系碳酸盐岩储层岩石物理响应特征为:低纵、横波阻抗,低纵、横波速度比,低泊松比,低拉梅常数和剪切模量,低拉梅常数乘密度和剪切模量乘密度.AVO属性碳氢指示、泊松比差及流体因子绝对值大.AVO模型正演显示随偏移距增大,含气合成道集振幅变小明显,频率降低,含油、含水合成道集振幅也变小,但不明显;而对于AVO属性P*G和流体因子,含油气后绝对值变大. 相似文献
8.
虽然煤田三维地震勘探已经过了十多年的发展，但构造解释问题仍是目前需要解决的主要问题之一.随着三维地震资料解释方法的不断发展，小波分析技术、相干体技术、地震属性技术、图像处理等提高解释精度的方法相继在地震勘探领域中得到应用.另一方面，由于煤矿采区三维地震勘探资料一般具有高信噪比和高分辨率的特点，为做好三维地震资料精细构造解释提供了物质基础.本文结合小波分析技术、相干体技术、地震属性技术等多种方法，结合两个采区的实例，对小断层和小规模陷落柱做了精细构造解释.解释结果显示联合使用以上几种解释技术，能提高三维地震资料的构造解释精度和可靠信. 相似文献
9.
10.
《应用地球物理》2015,(1)
本文是三分量地震在陆相薄互层地震勘探中应用成功的首例。大庆长垣喇嘛甸油田处于高含水开发后期,储层预测的主要难题是密井网条件下厚度2m以上砂体的边界识别问题,常规单一纵波地震解释存在多解性,引入横波信息可增加地震解释的可靠性。本文根据纵、横波对气藏的响应特征,利用纵、横波联合振幅属性、分频属性对气藏进行了分析,能够很好地反应气藏的边界,体现了横波受流体影响较小的优势。通过测井曲线岩石物理定量的分析了该地区主要是密度、λρ和μρ三种物性参数能够很好地反映储层岩性变化。在以地震数据分频为核心的高精度地震参考标准层解释基础上利用纵、横波联合反演得出的纵、横波速度比、λρ、μρ等属性与测井解释的储层具有很好的一致性,多波属性λρ沿层切片描述了开发小层的砂体平面展布,与井砂岩图具有较高的一致性,刻画了井间砂体边界变化的细节,并指示了剩余油挖潜的有利区域。 相似文献
11.
Coal resources and water resources play an essential and strategic role in the development of China's social and economic development, being the priority for China's medium and long technological development. As the mining of the coal extraction is increasingly deep, the mine water inrush of high-pressure confined karst water becomes much more a problem. This paper carried out research on the hundred-year old Kailuan coal mine's karst groundwater system. With the help of advanced Visual Modflow software and numerical simulation method, the paper assessed the flow field of karst water area under large-scale exploitation. It also predicted the evolution ofgroundwaterflow field under different mining schemes of Kailuan Corp. The result shows that two cones of depression are formed in the karst flow field of Zhaogezhuang mining area and Tangshan mining area, and the water levels in two cone centers are −270 m and −31 m respectively, and the groundwater generally flows from the northeast to the southwest. Given some potential closed mines in the future, the mine discharge will decrease and the water level of Ordovician limestone will increase slightly. Conversely, given increase of coal yield, the mine drainage will increase, falling depression cone of Ordovician limestone flow field will enlarge. And in Tangshan's urban district, central water level of the depression cone will move slightly towards north due to pumping of a few mines in the north. 相似文献
12.
地震属性技术在岩性和构造解释等方面得到了越来越广泛的应用，特别是在煤、油气资源勘探中具有重要的作用.基于淮南矿区谢桥1区13 1煤层地震勘探资料，提取了28种地震属性数据；通过地震属性的分析，优选出平均峰值振幅、振幅的峰态、最大绝对振幅、瞬时频率斜率等4种地震属性作为煤层厚度预测模型基本参数，结合已知钻孔资料，利用多元多项式回归以及BP人工神经网络方法，求出了各属性与煤厚之间的多元多项式回归模型及人工神经网络模型，并对模型进行了误差分析和应用结果对比分析，反映出人工神经网络模型在煤厚预测中具有好的应用效果. 相似文献
13.
Hydrogeochemical evolution of Ordovician limestone groundwater in Yanzhou,North China 总被引：1，自引：0，他引：1
Yong Han Guangcai Wang Charles A Cravotta III Weiyue Hu Yueyue Bian Zongwen Zhang Yuanyuan Liu 《水文研究》2013,27(16):2247-2257
Major‐ion compositions of groundwater are employed in this study of the water–rock interactions and hydrogeochemical evolution within a carbonate aquifer system. The groundwater samples were collected from boreholes or underground tunnels in the Ordovician limestone of Yanzhou Coalfield where catastrophic groundwater inflows can be hazardous to mining and impact use of the groundwater as a water supply. The concentration of total dissolved solid (TDS) ranged from 961 to 3555 mg/l and indicates moderately to highly mineralized water. The main water‐type of the middle Ordovician limestone groundwater is Ca‐Mg‐SO4, with SO42‐ ranging from 537 to 2297 mg/l, and average values of Ca2+ and Mg2+ of 455.7 and 116.6 mg/l, respectively. The water samples were supersaturated with respect to calcite and dolomite and undersaturated or saturated with respect to gypsum. Along the general flow direction, deduced from increases of TDS and Cl‐, the main water–rock interactions that caused hydrogeochemical evolution of the groundwater within the aquifer were the dissolution of gypsum, the precipitation of calcite, the dissolution or precipitation of dolomite, and ion exchange. Ion exchange is the major cause for the lower mole concentration of Ca2+ than that of SO42‐. The groundwater level of Ordovician aquifer is much higher than that of C‐P coal‐bearing aquifers, so the potential flow direction is upward, and the pyrite in coal is not a possible source of sulfate; additional data on the stable sulfur and oxygen isotopic composition of the sulfate may be helpful to identify its origin. Although ion exchange probably accounts for the higher mole concentration of Na+ than that of Cl‐, the dissolution of aluminosilicate cannot be ruled out. The data evaluation methods and results of this study could be useful in other areas to understand flow paths in aquifers and to provide information needed to identify the origin of groundwater. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献
14.
上组煤采空区对于下组煤的成像和安全回采有着重要影响,有必要研究矿区上组煤采空区精准成像技术。对于实际采空区及其下组煤的地震响应特征预测来说,建立和实际地质情况相吻合的正演模型是基础。根据搜集到的研究矿区钻孔测井资料,获取建模所需的等效地层物性参数、采空区垮落带等效模量、裂隙带等效模量等数据,建立与研究矿区地质情况比较接近的地质模型;通过正演模拟,对水平叠加剖面、偏移剖面地震响应进行分析,采空区波场特征表现为时间延迟、振幅变化、频率降低且对下部反射波有明显影响,干采空区的影响时差大于含水采空区的影响时差;通过不同地震属性的提取分析,发现采空区的地震属性明显区别于正常煤层,干采空区的地震属性和正常煤层的地震属性间差别更大。 相似文献
15.
A. Amendola G. Gabbriellini P. Dell'Aversana A. J. Marini 《Geophysical Prospecting》2017,65(Z1):49-58
Seismic facies analysis is a well‐established technique in the workflow followed by seismic interpreters. Typically, huge volumes of seismic data are scanned to derive maps of interesting features and find particular patterns, correlating them with the subsurface lithology and the lateral changes in the reservoir. In this paper, we show how seismic facies analysis can be accomplished in an effective and complementary way to the usual one. Our idea is to translate the seismic data in the musical domain through a process called sonification, mainly based on a very accurate time–frequency analysis of the original seismic signals. From these sonified seismic data, we extract several original musical attributes for seismic facies analysis, and we show that they can capture and explain underlying stratigraphic and structural features. Moreover, we introduce a complete workflow for seismic facies analysis starting exclusively from musical attributes, based on state‐of‐the‐art machine learning computational techniques applied to the classification of the aforementioned musical attributes. We apply this workflow to two case studies: a sub‐salt two‐dimensional seismic section and a three‐dimensional seismic cube. Seismic facies analysis through musical attributes proves to be very useful in enhancing the interpretation of complicated structural features and in anticipating the presence of hydrocarbon‐bearing layers. 相似文献
16.
Statistical facies classification from multiple seismic attributes: comparison between Bayesian classification and expectation–maximization method and application in petrophysical inversion 
下载免费PDF全文
下载免费PDF全文 We present here a comparison between two statistical methods for facies classifications: Bayesian classification and expectation–maximization method. The classification can be performed using multiple seismic attributes and can be extended from well logs to three‐dimensional volumes. In this work, we propose, for both methods, a sensitivity study to investigate the impact of the choice of seismic attributes used to condition the classification. In the second part, we integrate the facies classification in a Bayesian inversion setting for the estimation of continuous rock properties, such as porosity and lithological fractions, from the same set of seismic attributes. The advantage of the expectation–maximization method is that this algorithm does not require a training dataset, which is instead required in a traditional Bayesian classifier and still provides similar results. We show the application, comparison, and analysis of these methods in a real case study in the North Sea, where eight sedimentological facies have been defined. The facies classification is computed at the well location and compared with the sedimentological profile and then extended to the 3D reservoir model using up to 14 seismic attributes. 相似文献
17.
地层孔隙水含量的计算主要受地层孔隙度与孔隙含水饱和度的影响.通过实验室煤层及其顶底板岩芯物理测试与孔隙度测量,可以获得煤系地层岩芯的孔隙度与岩芯纵、横波速度的经验公式;结合三分量地震勘探获得的纵波与横波速度,能够计算出煤系地层的孔隙度;含水饱和度的计算通过实验室岩电参数测试和阿尔奇公式可以计算得到.结合淮南某矿区三维三分量地震勘探和地球物理测井及岩样的岩电试验,实现了三维空间煤系地层孔隙含水体积百分比的精确计算.该预测方法与传统的、钻孔控制的地下水评价方法相比可以提供相对精细的、三维空间的、定量化的煤系地层孔隙相对含水量,对煤炭与煤层气资源开采中所涉及的地下水分布规律预测有一定的参考意义. 相似文献
18.
本文报道塔里木地块阿克苏—柯坪—巴楚地区奥陶纪古地磁研究新结果.对采自44个采点的灰岩、泥灰岩及泥质砂岩样品的系统岩石磁学和古地磁学研究表明,所有样品可分成两组：第一类样品以赤铁矿和少量磁铁矿为主要载磁矿物,该类样品通常可分离出特征剩磁组分A;第二类样品以磁铁矿为主要载磁矿物,系统退磁揭示出这类样品中存在特征剩磁组分B.特征剩磁组分A分布于绝大多数奥陶纪样品中,具有双极性,但褶皱检验结果为负,推测其可能为新生代重磁化.特征剩磁组分B仅能从少部分中晚奥陶世样品中分离出,但褶皱检验结果为正,且其所对应古地磁极位置（40.7°S,183.3°E,dp/dm=4.8°/6.9°）与塔里木地块古生代中期以来的古地磁极位置显著差别,表明其很可能为岩石形成时期所获得的原生剩磁.古地磁结果表明塔里木地块中晚奥陶世位于南半球中低纬度地区,很可能与扬子地块一起位于冈瓦纳古大陆的边缘;中晚奥陶世之后,塔里木地块通过大幅度北向漂移和顺时针旋转,逐步与冈瓦纳大陆分离、并越过古赤道;至晚石炭世,塔里木地块已到达古亚洲洋构造域的南缘. 相似文献