冲湖积平原水源地的水文勘测

本文系统地阐述了冲湖积平原水源地水文勘测工作方法及要求，结合小杨庄水源地指出了水文勘测工作的重要性。     

The formation of eclogite facies metatroctolites and a general petrogenetic grid in Na2O–CaO–FeO–MgO–Al2O3–SiO2–H2O (NCFMASH)

Eclogite facies metatroctolites from a variety of Western Alps localities (Voltri, Monviso, Lanzo, Allalin, Zermat–Saas, etc.) that preserve textural evidence of their original form as bimineralic olivine‐plagioclase rocks are considered in terms of calculated mineral equilibria in the system Na₂O‐CaO‐FeO‐MgO‐Al₂O₃‐SiO₂‐H₂O (NCFMASH). Pseudosections, based on a new petrogenetic grid for NCFMASH presented here, are used to unravel the metamorphic history of the metatroctolites, considering the rocks to consist of different composition microdomains corresponding to the original olivine and plagioclase grains. On the basis that the preservation of the mineral assemblage in each microdomain will tend to be from where on a rock's P–T path the metamorphic fluid phase is used up via rehydration reactions, P–T pseudosections contoured for water content, and P–T path‐M_H2O (amount of water) pseudosections, are used to examine fluid behaviour in each microdomain. We show that the different microdomains are likely to preserve their mineral assemblages from different places on the P–T path. For the olivine microdomain, the diagnostic mineral assemblage is chloritoid + talc (+ garnet + omphacite). The preservation of this assemblage, in the light of the closed system P–T path‐M_H2O relationships, implies that the microdomain loses its metamorphic fluid as it starts to decompress, and, in the absence of subsequent hydration, the high pressure mineral assemblage is then preserved. In the plagioclase microdomain, the diagnostic assemblage is epidote (or zoisite) + kyanite + quartz suggesting a lower pressure (of about 2 GPa) than for the olivine microdomain. In the light of P–T path‐M_H2O relationships, development of this assemblage implies breakdown of lawsonite across the lawsonite breakdown reaction, regardless of the maximum pressure reached. It is likely that the plagioclase microdomain was mainly fluid‐absent prior to lawsonite breakdown, only becoming fluid‐present across the reaction, then immediately becoming fluid‐absent again.     

Distribution and characteristics of volcanic reservoirs in China

About forty productive oil/gas fields hosted in volcanic reservoirs have been found since 1957 in fourteen basins of China. They can be simply subdivided into two groups, the east and the west. Reservoir volcanic rocks of the east group are predominantly composed of Late Jurassic to Early Cretaceous rhyolite and Tertiary basalt, preferred being considered as rift type volcanics developed in the circum-Pacific tectonic regime. Those of the west are Permo-Carboniferous intermediate/basic volcanic rocks, being island-arc type ones developed in paleo-Asian Ocean tectonic regime.     

洛阳市供水前景预测及对策探讨

洛阳市地下水资源量丰质优，远期供水前景较为乐观。然而，由地下水开采引起的环境水文地质问题仍属客观存在。本文在供水前景预测的基础上，提出了五项对策，对城市远期供水规划具借鉴意义。     

Theoretical Model and Dynamic Analysis of Soft Yoke Mooring System

As a popular solution for mooring an FPSO （Floating Production, Storage and Offloading） permanently in shallow water, the soft yoke mooring system has been widely used in ocean oil production activities in the Bohai Bay of China. In order to simulate the interaction mechanism and conduct dynamic analysis of the soft yoke mooring system, a theoretical model with basic dynamic equations is established. A numerical iteration algorithm based on error estimation is developed to solve the equations and calculate the dynanfic response of the mooring system due to FPSO motions. Validation is conducted by wave basin experimentation. It is shown that the numerical simulation takes only a few iteration times and the final errors are small. Furthermore, the calculated results of both the static and dynamic responses agree well with those ones obtained by the model test. It indicates that the efficiency, the precision, the reliability and the validity of the developed numerical algorithm and program are rather good. It is proposed to develop a real-time monitoring system to further monitor the dynamic performance of the FPSO with a soft yoke mooring system under various real sea environments.     

莱州湾南岸第三陆相层年龄的铀系等时线法（TSD）测定

于莱州湾南岸ZK32-1钻孔第三陆相层上下边界处选取自生钙质结核,采用样品全溶铀系等时线法(TSD法)测定钙质结核的年龄。测试结果表明,所有等时线上的数据都有很好的线性关系,表明所获得的年龄数据是合理的。通过对样品代表性的讨论,说明所选取的钙质结核的年龄确可代表其所在地层的年龄,从而得出莱州湾南岸第三陆相层的沉积起止时间为72.16ka B.P.±7.41ka B.P.到45.34ka B.P.±5.35ka B.P.的结论。本研究首次获得莱州湾南岸地层的铀系TSD年龄,为全面认识该地区晚更新世地层年代学提供了一个新视角。     

惠民凹陷孔店期盆地原型格架对油气成藏的影响

为了准确评价惠民凹陷古近系孔店组的油气资源,研究盆地原型格架对油气成藏的影响是一个重要的方面.首先对盆地的构造演化进行分析,发现受构造演化的影响,孔店组不同时期的厚度(或残留厚度)在凹陷不同部位有所不同,导致主力烃源岩生烃条件发生变化;孔店期原型盆地为北断南超的伸展半地堑,盆地长轴方向整体为近东西向,主要的控制性断层是凹陷北部的边界断层-滋镇断层和阳信断层;通过计算盆地的残余厚度和剥蚀厚度,恢复了原型盆地的厚度,孔二亚段地层向南部斜坡带超覆,发育3个沉降中心,分别位于滋镇和临南洼陷东北部及阳信洼陷,孔一亚段沉积具有继承性,但北东向的滋镇、阳信断层对地层的控制更为明显;沉积中心迁移的结果显示:孔二亚期-孔一亚期沉积中心迁移,对在滋镇和临南洼陷内孔店组地层油气成藏及阳信断层下降盘的储层中成藏有利,但孔一亚期-沙四亚期沉积中心的迁移,对油气在孔一-沙四段储层中成藏不利.     

地震属性分析在块碳酸盐岩储层研究中的应用

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.     

山东沾化凹陷孤岛油田馆上段浅水湖泊沉积

综合研究钻井、古生物和测井资料,认为孤岛油田新近系馆陶组上段馆1 2砂层组沉积时期发育浅水湖泊而非单一的河流相沉积。浅水湖泊湖盆地形平坦,湖面广阔,水体极浅;湖区受气候影响,湖平面频繁振荡式升降变化;沉积物多表现为氧化、还原环境交替的红灰相间的细粒沉积物;湖泊沉积构造发育,生物富集,水进→水退沉积旋回性明显。通过取心井的观察描述和分析化验,识别出水道砂坝、砂坪、混合坪、泥坪和沼泽5种沉积微相类型,建立了孤岛油田馆1 2砂层组浅水湖泊沉积模式。