天然气中氦同位素分布及构造环境

通过采集天然气样３３４个，测量了它们的氦同位素组成。３Ｈｅ／４Ｈｅ值分布在０５６×１０－８～７２１×１０－６范围。３Ｈｅ／４Ｈｅ值分布与天然气储层时代无明显的相关性，而在空间展布上有较明显的规律。东部含油气区３Ｈｅ／４Ｈｅ值主要分布于１０－７～１０－６范围，西部含油气区在１０－７～１０－８的范围，中部地区分布在０５６×１０－９～０５６×１０－８范围，３Ｈｅ／４Ｈｅ值的分布与我国构造环境大的格局有很好的相关性。３Ｈｅ／４Ｈｅ的高值区构造环境活动性强，低值区具有最稳定的大地构造属性，西部地区３Ｈｅ／４Ｈｅ值介于东部和中部，具有次稳定的构造环境。     

谈我国重大自然灾害的中长期综合预报问题

由于自然灾害的发生不是地球某单一圈层内部的孤立行为，而是地球系统各圈层（地、水、气、生、冰）的相互作用加上某些天文因素触发的结果，所以灾害预测是一项跨学科的综合手段的研究。文章从能量的聚集、传递、释放等角度探讨了灾害发生的动力学机制及各圈层在其中所起的控制作用，并介绍了我们开展灾害综合预测研究的思路和模型框架。     

现行几个主要产流模型的剖析

目前广泛应用的几个主要产流模型各有特点，但以往对它们的综合比较及其相互关系研究得不多，从而造成了用户选择模型的困难。通过深入剖析与对比，搞清了这几个模型之间的联系与区别，以及应用中需要注意的问题，一般情况下，应优选用综合产流模型。     

粮食作物产量估算方法研究

文章分析了我国自然植被净第一生产力的分布状况和粮食作物生物量的时空变化，以及自然植被净第一生产力与粮食作物生物量的关系，并在此基础上，提出一种我为粮食作物产量的估算的方法。     

松嫩平原西部自然灾害及防治对策

松嫩平原西部由于特有的地质，地理演化过程和气候，水文条件制约，集旱、涝、盐碱、风沙等自然灾害为一体，并伴随该区人口的增加，较长时期只顾开发，忽视治理和保护，从而加剧中种自然灾害发生，该区灾害的防治应以协调人地关系为原则，水利控制与生物工程相结合，开发与治理和保护并举。     

A PRELIMINARY STUDY ON TRE ZONE OF ALPINE SCRUB AND MEADOW OF QINGHAI-XIZANG (TIBETAN) PLATEAU

Locatedinthenuddle-eastempartofQingl1ai-XizangPlateau,thezoneofalpinescrubandmeadow,charaCterizedbyhigl1landsubpolarhu1hid/subhumiddimate,isatransitionalroponfromdeePgorgestoinIandofh1eplateauproper.ThezoneofalpinescrtlbandmeadowstretchesinadireCtionofWSWtoENE,forminganaturalzoneontheplateau.Tl1enaturalzoneisLutiqueinphyslcalenvirorunentsandnaturalecosystems,andcouldnotbefoUndatthelowlandselseWhereonEarth(Figurel).I.CharacteristicsofPbysicalEnvironmentsStartedfromZoigeandAbaofSichuan…     

An analytical approximation of the distribution of total hydrocarbon discoveries as a function of discovery number

Recently, Manly's method has been successfully applied to hydrocarbon exploration modeling in order to approximate the expected value and the standard deviation of the total amount of hydrocarbons discovered. This method is much faster than running prolonged simulations normally required by the probabilistic model of the hydrocarbon discovery process, and the results are very accurate. This paper extends the usefulness of the approximation method by developing an approximate analytical model of the whole probability distribution of the total volume of hydrocarbons discovered. The mean and the standard deviation from Manly's approximation are used to help set the parameters of a family of beta distributions, to represent the distributions of the total amount of hydrocarbons discovered from the beginning to the end of the exploration process in an area. Three real datasets—the Nova Scotian Shelf from offshore northeastern Canada, the Bistcho Play, and the Zama Play from northwestern Canada—are chosen to verify the methodology developed. Confidence intervals of the forecast for each number of discovered fields are constructed from the analytical approximation and compared with confidence intervals generated by the simulation. Sensitivity analyses are performed to show that the idea of using a family of beta distributions is a robust approximation.     

自然降雨量与水稻产量的关系

利用旬雨量与历史同期产量资料，使用积分回归和多元回归等方法，分析自然降雨量与水稻产量的关系，以证实人工增雨对水稻产量提高所起的作用。结果表明，全省早稻亩产量随旬雨量增加平均为０．１６４ｋｇ／ｍｍ，晚稻亩产量增加平均为０．１１ｋｇ／ｍｍ。     

Evidence of fluid inclusion for thermal fluid-bearing hydrocarbon movements in Qiongdongnan Basin, South China Sea

Diagenetic research and inclusion observance indicate that there are seven types of inlcusion in the reservoirs in the Qiongdongnan Basin. Based on the fluorescence color, ratio of gas/liquid, formation temperature, salinity and organic component of fluid inclusions, three events of thermal fluid movement were found, and only the second and third events are relative to hydrocarbon migration and accumulation with the temperatures of 140–150°C and 170–190°C., respectively.The mechanism of gas migration in aqueous phase suggests that the discharging site of thermal fluid is the favourable location for natural gas accumulation. Project supported by the Natlonal Natural Science Foundation of China.     

天然热释光测量方法在地质找矿中的应用

天然热释光测量方法是近几年发展起来的寻找隐伏铀矿体的方法。同时也是一种新的地质研究手段。经多种类型铀矿床的试验结果表明,该方法能有效地发现埋深几十米至二百多米深的盲矿体。此外,还可划分复式岩体不同侵入期和确定其侵入时代;区分产铀岩体与非产铀岩体;划分硅化带中各期石英岩的先后活动序次,进而确定与矿化有关的断裂带及各种热液铀矿脉的成矿时代。