ArcGIS下的油田勘探资料管理方案

在长期的石油勘探工作中积累了包括地震、测井、地质以及其它非震地球物理方法等方面的大量资料。对这些与空间信息密切相关的资料进行数字化管理的理想方案是通过地理信息系统平台实现。油气勘探数据管理系统选用ArcGIS平台。用商业DBMS如oracle8作为数据库服务器，采用三层式C／S结构，用ESRI的Geodatabase模型和ArcSDE建立分布式勘探地理数据库。整个勘探地理数据库按专业或专题分为若干子库，每个子库都可以位于地理位置不同的专业数据服务器上，通过油田内部宽带网连接。制订勘探资料元数据标准，并根据元数据标准编制元数据同步程序和编辑器，实现油田勘探资料的规范化管理。     

基于地质与重磁数据集成的栾川钼多金属矿区三维地质建模

三维地质建模是当前国内外矿产资源勘查与评价研究的重要途径和热点.以栾川钼多金属矿区为例,针对研究区地质背景复杂、成矿地质条件多样性特征,开展了基于地质(岩性地层及其物性特征、地质体产状数据)与重磁正反演集成技术组合的三维地质模型建模研究,其研究内容为:(1)根据研究区地质背景和成矿条件,确定研究区矿床地质特征以及近地表地质体的空间属性特征;(2)利用重磁数据,在定性解译地质信息的基础上,开展二度半正演方法定量解译研究,并运用三维位场概率成像方法反演和解译深部地质体;(3)根据研究区地质与重磁反演解译资料综合分析,确定晚侏罗世斑岩岩体和控矿构造的时-空-因关系.研究结果表明,基于地质岩性属性特征的重磁正反演联合解译,能够综合利用地质体之间的物性差异、成因关系界定其几何形态,从而在三维环境中建立它们的时空关系,即三维地质模型,为研究区深部找矿、矿体定位预测以及金属矿产资源定量评价提供技术支撑和新途径      

Fluid Inclusions and C?H?O?S?Pb Isotopes: Implications for the Genesis of the Zhuanshanzi Gold Deposit on the Northern Margin of the North China Craton

The Zhuanshanzi gold deposit lies in the eastern section of the Xingmeng orogenic belt and the northern section of the Chifeng‐Chaoyang gold belt. The gold veins are strictly controlled by a NW‐oriented shear fault zone. Quartz veins and altered tectonic rock‐type gold veins are the main vein types. The deposits can be divided into four mineralization stages, and the second and third metallogenic stages are the main metallogenic stages. In this paper, based on the detailed field geological surveys, an analysis of the orebody and ore characteristics, microtemperature measurement of fluid inclusions, the Laser Raman spectrum of the inclusions, determination of C? H? O? S? Pb isotopic geochemical characteristics, and so on were carried out to explore the origin of the ore‐forming fluids, ore‐forming materials, and the genesis of the deposits. The results show that the fluid inclusions can be divided into four types: type I – gas–liquid two‐phase inclusions; type II – gas‐rich inclusions; type III– liquid inclusions; and type IV – CO₂‐containing three‐phase inclusions. However, they are dominated by type Ib – gas liquid inclusions and type IV – three‐phase inclusions containing CO₂. The gas compositions are mainly H₂O and CO₂, indicating that the metallogenic system is a CO₂? H₂O? NaCl system. The homogenization temperature of the ore‐forming fluid evolved from a middle temperature to a low temperature, and the temperature of the fluid was further reduced due to meteoric water mixing during the late stage, as well as a lack of CO₂ components, and eventually evolved into a simple NaCl? H₂O hydrothermal system. C? H? O? S? Pb isotope research proved that the ore‐forming fluids are mainly magmatic water during the early stage, with abundant meteoric water mixed in during the late stage. Ore‐forming materials originated mostly from hypomagma and were possibly influenced by the surrounding rocks, suggesting that the ore‐forming materials were mainly magmatic hydrothermal deposits, with a small amount of crustal component. The fluid immiscibility and the CO₂ and CH₄ gases in the fluids played an active and important role in the precipitation and enrichment of Au during different metallogenic stages. The deposit is considered a magmatic hydrothermal deposit of middle–low temperature.     

泌阳凹陷安棚地区油气成藏条件及富集主控因素

泌阳凹陷为—东秦岭褶皱带上发育起来的中新生代箕状断陷.安棚地区位于该凹陷东南部,来自南部陡坡带的扇三角洲砂体与安棚鼻状构造配置形成以砂岩上倾尖灭为主要圈闭类型的油气藏.油气储层成岩演化阶段进入晚成岩B期,成岩作用较强,储层物性较差,具低孔低渗特征.但沿鼻状构造的轴部微裂缝较发育,改善了储层储集性能.研究认为,丰富的油源...