共查询到20条相似文献，搜索用时 58 毫秒
1.
2.
3.
4.
受低幅度构造、地层倾角小、储层渗透率低、油源供给不足等因素影响,油层中存在自由水,若整个开发层系的油层大面积内均为油水同层,则称为低含油饱和度油藏。低含油饱和度油藏油井投产初期就具有一定含水率。由于室内岩心试验获得的油水相对渗透率曲线是在饱和油情况下进行,因此,油田实际含水与采出程度和利用室内试验曲线计算出的理论含水与采出程度曲线不能较好吻合,当油藏原始含水饱和度较高时这种误差会很大,导致含水与采出程度理论曲线无法正确预测油藏含水上升规律。根据试验获得的相渗曲线和实际生产数据,采用试验数据与生产实际相互印讧的方法,修正油藏含水上升规律,计算油藏原始含水饱和度,解决了油藏原始含油饱和度计算以及具有原始含水饱和度油藏含水上升规律预测问题,对正确认识油藏和开发指标预测具有重要意义。 相似文献
5.
地震波穿过地层时会发生频散和衰减,岩层中含有油气等流体时,频散和衰减有其特殊性,双相介质理论能很好地刻画地下介质含有流体时的情况。本文基于双相介质理论公式,研究流体参数和频率对地震波衰减和频散的影响规律。结果表明:地震波低频成分衰减较弱,高频成分衰减较强;黏弹性强的流体频散强,粘弹性低的流体频散弱;衰减和频散可以作为油气存在的标志。文中通过广义S变换,对实际地震资料计算,较准确地提取地震波的低频、高频能量和频散特征曲线,并对实际资料进行了含油气性预测,取得了与钻井一致的结果。 相似文献
6.
7.
我国东海陆架地区新生代地层的热导率 总被引：10，自引：0，他引：10
对东海陆架区的浅表层柱状岩芯样品和多口钻井岩心样品的热导率数据按岩性、深度、年龄和孔隙度进行了统计分析。发现泥岩、粉砂岩和砂岩的热导率有所不同。在3000m以上，泥岩的热导率大于砂岩的热导率；而在3000m以下砂岩的热导率则大于泥岩的热导率。粉砂岩的热导率基本介于泥岩和砂岩之间。岩石的热导率和岩石样品所处的深度密切相关，随着深度的增大热导率数值增大。岩石的年龄影响岩石的热导率。在同等深度的情况下，年龄越老，热导率数值越高，但埋深浅的老地层热导率会小于埋深大的新地层的热导率。孔隙度和含水对岩石样品的热导率有很大的影响，岩石会因孔隙中含水而使热导率有非常大的变化。本文给出了饱和水热导率和干样热导率之差和孔隙度的回归方程。 相似文献
8.
地震勘探中,一个很重要的方面就是确定所勘探地区中岩石的波速。影响地震波速度的主要因素是:(1)构成岩石基质的成分及它们的弹性常数和密度;(2)岩石的孔隙度;(3)覆盖岩层所产生的自重压力;(4)岩石中孔隙水的作用;(5)地温对岩石的弹性特征的改变;(6)成岩的地质环境。当受到应力、化学或热的影响时,岩石的性能也发生变化;(7)岩石年代等。 相似文献
9.
10.
在循环载荷下岩石发生应力-应变的非线性弹性行为是普遍的,孔隙流体、载荷频率、围压、层理方向是造成岩石应力应变滞后、能量衰减、刚性变化等特征的重要外部变量。基于来自大庆、南京、合肥等地的砂岩样品,利用电液闭环伺服控制压机系统,开展了不同饱和流体砂岩的应力-应变滞回曲线、不同载荷频率和饱和流体对岩石的衰减、不同层理方向加载和卸载对岩石杨氏模量影响的实验对比研究,阐明了饱和岩石的非线性响应特征,揭示了外界影响因素对岩石产生非线性形变的作用机制,探讨了岩石内部触面间摩擦阻力在岩石发生非线性形变过程中发挥的媒介作用,并推断接触面颗粒之间的摩擦阻力可能是导致岩石发生衰减、滞后等非线性行为的内在因素。本研究拟通过岩石内部小尺度的摩擦作用与构造尺度断层面上的摩擦滑移相似性,来揭示地震发生时岩体失稳的动力学过程。 相似文献
11.
营口市位于辽宁省的中南部，面对渤海的辽东湾，背依鞍山市平原丘陵，东邻辽东崇山峻岭，西接盘锦市沿海平原，有辽河蜿蜒人海，海岸线绵延曲折。由于受海洋、河流的影响．营口市四季分明，气候宜人，蕴藏着丰富的滨海旅游资源，海蚀景观、地质珍迹、人文景观等资源各显异彩；尤其是海水浴场，条件极为优越，与国际上一流的海水浴场相比．毫不逊色，在某些特征上还稍胜一筹。 相似文献
12.
A. P. Tolstosheev 《Physical Oceanography》2009,19(6):358-365
A method for the estimation of the results of reconstruction of the trajectories of drifting buoys is proposed. It is based
on the comparison of the estimates of power spectral densities for the components of current velocity computed according to
three data sets: the data set of the coordinates of a drifting buoy with a built-in GPS receiver, the data set of coordinates formed on the basis of the first set but with data missing and observational errors
corresponding to the actual trajectory measurements by the Argos satellite location and data collection system by the Doppler method, and the data set of coordinates obtained as a result
of interpolation of the second set. As an example, we consider the procedure of realization of the proposed method and demonstrate
the efficiency of its application for the improvement of the reliability of reconstruction of the trajectories of drifting
buoys. 相似文献
13.
I. E. Timchenko A. A. Primalenny V. D. Yarin E. F. Vasechkina E. M. Igumnova 《Physical Oceanography》2001,11(4):367-378
We use many-year archival observations of hydrologic and hydrobiologic state of the Sea of Azov for the identification of
the structure of a model of its ecosystem. The ecosystem model, supplemented with expert estimates of bioresource consumption
(fish reserve), contamination level, and possible ecologic fines for violation of the sea natural state, is formalized by
the method of system dynamics. Hereat, the major part of influence functions is found in terms of observational data with
application of self-organization algorithms. We also present the results of simulated experiments with the model of the ecosystem,
which enable us to analyse scenarios of its behaviour under the influence of various external factors (wind, river discharge,
water exchange with the Black Sea, etc.).
Translated by Peter V. Malyshev and Dmitry V. Malyshev 相似文献
14.
15.
An attempt has been made to estimate the fishery potentials of the EEZ of India on the basis of data on primary and secondary production. The total column primary production and zooplankton production have been calculated to be 265·9 and 9 million tonnes of carbon per year, respectively. From these values the fishery potential has been estimated as 2·5 million tonnes per year. To this, if we add the estimated demersal fish catch, being 1·2 million tonnes per year, the total potential yield comes to 3·7 million tonnes per year. Since the present average total catch is about 1·6 million tonnes in a year, the fish catch could be doubled. 相似文献
16.
天然气水合物地球化学特征 总被引：4，自引：0，他引：4
天然气水合物是在低温、高压以及有足够气体供应条件下形成的一种天然气(主要为甲烷)与水组成的似冰状固态化合物。天然气水合物中包含的甲烷碳是全球甲烷资源的重要组成部分,是一种数量巨大的潜在能源[1]。而且由于甲烷的温室效应,天然气水合物分解释放的甲烷进入大气中会严重 相似文献
17.
1992年，联合国21世纪议程提出了综合管理的概念，并认为它是海岸管理的最重要目标，而海岸管理的目的就是改进业已存在的管理实践的效率和效果。在21世纪议程的实施过程中，沿海国家面临着巨大的困难，即：为了使综合管理在实践中具有可操作性而建立适合的政府机构。韩国正是在国家范围和次一级区域进行这项工作的实验场所。这项工作的最重要成就是在1996年成立了具有综合协调各涉海部门职能的韩国海洋事务与渔业部（MOMAF）。这篇文章的内容主要来自于这些观察，即韩国政府为建立海岸带综合机制而进行了各种努力，特别是1992年联合国环发大会召开后到1997年初海洋事务与渔业部成立了海岸带管理处这段时间里开展的各种工作，文章重点在于评价在建立海岸带综合机制的过程中综合的概念是如何被应用并被挑战的。文章提出了在东亚地区沿海国家开展合作的可能区域的建议。 相似文献
18.
19.
Values of root mean square slope 0 and its variations -0 are estimated using the brightness field of an image of the surface of the sea near a speck of light. When 0 and -0 are defined it is highly important to take into account direct as well as dissipated solar radiation.The space-time analysis of the structure of the image brightness field is performed. This gives an opportunity to estimate dispersion relationship and the running effect of a brightness contrast packet. Comparison of the parameters obtained with the theoretical dispersion ratio of internal waves (IW) allows one to make a conclusion that IW surface manifestations are recorded in a frame.UDK 551.463.5 相似文献
20.
The analysis of the structure of the cryolithozone, facies, and thicknesses of the Quaternary sediments and the results of the physicochemical mathematical modeling of the modern shelf of the western part of the Laptev Sea support the influence of the Late Pleistocene glaciations on the heat conditions and the distribution of the permafrost in the area. A ～200-m thick glacier formed under aerial conditions from atmospheric precipitation represented the metamorphosed snow cover. According to the modeling, the long-living (from 60?50 to 10?4 ky) glacier reduced the thickness of the permafrost rocks in the reviewed shelf area for 280–360 m. The Holocene marine transgression additionally decreased the thickness from 50–140 m on the inner shelf to 220–350 m on the outer shelf. The modern submarine cryolithozone 450-0 m thick is wide-spread in the studied region from the coast to the shelf boundary (isobaths of 130–140 m), where it pinches out at a distance of ～380 km from the coast at a depth of ～250 m above the sea level. 相似文献