松辽盆地龙西地区泉四段砂岩岩石学特征及其对储层物性的影响

松辽盆地龙西地区泉四段主要为岩屑长石砂岩和长石岩屑砂岩,成份成熟度较低,粒度较细,分选中等偏差,填隙物主要为粘土矿物和方解石。研究表明,储层物性随着石英含量的增加而变好,而随着岩屑含量的增加而变差,说明成份成熟度影响岩石的抗压性,进而影响储层的物性。泉四段砂岩中的长石主要通过钾长石的溶蚀作用改善储层物性。粒度大小和均匀程度与储层物性呈正相关关系,砂岩粒度的均匀程度也是形成低孔低渗储层的内在因素之一。     

扬州市地质构造背景与氡浓度之间关系分析

本文通过对扬州市区地层岩性、地质构造、断裂及放射性元素氡的特性分析,阐明了地区地层岩性、地质构造、断裂与放射性元素氡的形成和运移之间存在的关系,为地区建设工程氡浓度检测与控制提供依据。     

沉积微相测井资料神经网络判别方法研究

不同的沉积微相可以由不同的相标志组合识别,相标志与沉积微相之间的关系可以采用神经网络通过许多基本处理单元间并行的相互作用建立。沉积微相相标志既可以由地质资料的观察、岩芯分析直接获得,也可以由测井资料间接地求得     

State of in-situ stress in different rocks

Ｓｔａｔｅｏｆｉｎ－ｓｉｔｕｓｔｒｅｓｓｉｎｄｉｆｆｅｒｅｎｔｒｏｃｋｓ（朱焕春，陶振宇）Ｈｕａｎ－Ｃｈｕｎ；ＺＨＵａｎｄＺｈｅｎ－ＹｕＴＡＯ（ＷｕｈａｎＵｎｉｖｅｒｓｉｔｙｏｆＨｙｄｒａｕｌｉｃａｎｄＥｌｅｃｔｒｉｃＥｎｇｉｎｅｅｒｉｎｇ，Ｗｕｈａ...     

Bedrock lithology control on contemporaneous alluvial fan facies, Oligo-Miocene, southern Pyrenees, Spain

Climate and tectonics play important roles in controlling processes of transport and deposition on alluvial fans, but the bedrock lithology in the fan catchment area is also a significant, independent factor. Adjacent Oligo-Miocene alluvial fan deposits on the northern margin of the Ebro Basin display contrasting depositional characteristics with one dominated by the deposits of debris flows and the other by deposition from flows of water. A difference in clast compositions indicates that the two studied fans (the Nueno and San Julián fans) had contrasting bedrock lithology in their drainage basins. The proximal facies of the Nueno fan body contains matrix-supported conglomerate beds with up to 80% pebble clasts of gypsum in a matrix of gypsiferous sand, interbedded with gypsarenite beds. The drainage basin of this fan was dominated by Triassic bedrock consisting of beds of gypsum, marl and micritic limestone. The San Julián fan body comprises clast-supported, polymict conglomerate beds containing pebbles from Triassic, Cretaceous and Palaeogene limestone units that are exposed in the adjacent part of the basin margin. The interfingering of the deposits of these two fans demonstrates that they were contemporaneous. Given the consistent climate, the differences in fan depositional processes must therefore be attributed to the contrasting bedrock lithology in their drainage basins. A drainage basin consisting mainly of marl and gypsum bedrock provided sufficient fine-grained material to generate debris flows, whereas more dilute, water-lain processes dominated where the drainage basin was largely limestone strata.     

SPATIAL CORRELATION ANALYSIS BETWEEN KARST ROCKY DESERTIFICATION AND LITHOLOGY IN DU''AN YAO AUTONOMOUS COUNTY IN GUANGXI

Du'an Yao Autonomous County is a typical area for the distribution of karst rocky desertification in Guangxi.The indices for the grades of rocky desertification are selected according to the scientific meaning of karst rocky desertification and after the interpretative symbol system of rocky desertification. RS images are established by the landscape characteristics of Du'an karst and its TM image. Relying on RS & GIS means and taking land use map as base map, this paper conducts synthetic analysis on the 1999a TM image (126-043) and the correlation data involving landform, soil, geological map and GPS-database and photo on the spot, and brings forth a map showing the Du'an rocky desertification grades and a digital lithology map. As can be viewed from spatial correlation, the inherent connection is also illuminated between the various levels of rocky desertification and the carbonate lithology.     

AVO处理解释和岩性识别

从AVO技术最初用于识别“亮点”等振幅异常开始，特别是近几年来新科技的发展和应用，使该技术在油气勘探领域中具有不可替代的作用。用AVO拟合的纵横波、梯度、近道和远道迭加等剖面，结合AVOC、AVO偏振性分析、交汇图、流体替换、声阻抗、波阻抗、LMR等技术，可以从地震剖面中提取与地层直接相关的岩石物理参数，如λ、μ、K、σ等，进而预测储层的岩性和合流体性。在对这些技术进行了详细的研究后，用实际资料对每一种方法进行验证，总结了一套适用于碳酸岩储层的岩性识别处理解释流程。     

综合测井资料在研究新疆吐哈盆地十红滩铀矿区地层岩性及沉积环境中的应用

本文阐述了吐哈盆地十红滩铀矿区岩石地球物理参数特征，并利用综合测井资料深人研究了地层划分、岩性识别，进行了沉积环境分析，对可地浸砂岩型铀矿找矿具有重要的意义。     

多波AVA地层参数反演

以Zoeppritz方程为基础，对多波AVA地层岩性参数反演进行探讨。根据给出的多层水平介质理论模型和实际多波地震资料，以广义线性反演作为数学工具，分别利用P－P波、P－SV波及P波与P－SV波联合进行了地层P波速度、S波速度及密度的反演。理论模型计算证明了该方法的正确性，并进一步验证了该方法对噪声有一定的抗干扰能力。实际多波数据计算结果也说明该方法可从多波地震记录反演得到较为准确的地层岩性参数。     

贵州岩溶地区岩性与土地石漠化的 相关分析

在构筑1：50万贵州岩溶地区岩石组合类型分布图的基础上，以GIS为分析手段，对贵州省石漠化分布图和地层岩性图进行了空间分析，探讨了各类岩性与不同级别石漠化之间的相关关系。石漠化与岩性具有明显的相关性，强度石漠化主要分布在纯质碳酸盐岩地区，尤其是纯质灰岩地区；中度石漠化在白云岩组合中的比例较灰岩组合中高；轻度石漠化在碳酸盐岩与碎屑岩夹层和互层中分布较广；石漠化与纯碳酸盐岩相关关系最明显。