相-势耦合控制鄂尔多斯盆地中生界石油聚集

鄂尔多斯盆地的石油主要聚集在中生界，因此研究盆地中生界石油聚集规律具有重要意义。在回顾油气勘探理论发展历程的基础上，通过鄂尔多斯盆地中生界烃源岩、沉积相带、运聚与油藏关系的系统分析，来探讨鄂尔多斯盆地中生界石油聚集规律。研究认为沉积相决定了烃源岩及储层的展布及发育特征，成岩相决定了优质储层的分布及储层的储集空间，压力势或流体势决定了油气运移方向和路径，相-势耦合决定了油气聚集圈闭位置。由于鄂尔多斯盆地含油层系延长组及延安组沉积期为大型内陆陆相坳陷盆地，内部构造相对简单，地层平缓，断裂较不发育，在6大成藏条件中盖层、保存、圈闭一般不存在主要问题，在烃源岩明确的条件下，主要需要考虑的是储层和运聚的问题，因而相-势耦合控制鄂尔多斯盆地中生界石油聚集，体现了“源控区、相控带、势定位”的石油聚集规律，具体表现为盆地中生界长7段、长9段生油岩的生烃范围控制了油藏分布的区域；含油区带的分布受控于盆地周缘的11大河流-三角洲体系；对受浮力控制的浅层油藏，鼻状构造凸起背景对油藏的形成和分布具有重要控制作用；对于受异常压力控制延长组下组合油藏，源-储压力差或者流体势决定了油气运移方向及聚集位置；在平面上及垂向上相-势耦合控制鄂尔多斯盆地中生界成藏的差异性，具体体现为盆地东部浅层呈现“补偿成藏”、盆地西部呈现“垂向串珠式成藏”、延长组深层呈现“异常压力控藏”的规律。这一认识同样适用于勘探程度较高的、以“定藏”或“定位”为目的其他大型坳陷含油气盆地的目标勘探。     

水利水电工程堆积体边坡稳定分析和工程措施研究

堆积体是中国西南地区普遍可见的一种地形地貌,通常处于临界状态,一遇开挖和降雨即可能发生开裂、解体和滑坡,给人员安全和工程顺利建设带来危害。本文结合近期几个水电工程面临的堆积体边坡的实际,探讨其失稳的机理,研究并推荐稳定分析及加固的方法。     

郭局子洼陷湖缘峡谷及其对洼陷储集砂体的贡献

对车镇凹陷郭局子洼陷沙河街组进行了精细的三维地震解释,从盆地的构造形态入手,识别出存在于盆地内的2个主要湖缘峡谷,并详细分析了这2条峡谷的形态和沉积充填特征.结合前人对湖缘峡谷发育模式的研究成果,从成因角度确定了在峡谷的影响下洼陷内部形成了辫状河三角洲和湖底扇沉积.在此基础上,进一步研究了湖缘峡谷沉积体系对洼陷内部储集砂体的贡献以及对油气成藏的影响.湖缘峡谷沉积体系对郭局子洼陷的储层具有重要影响,可以形成有利的储盖组合和油气运移通道,具备良好的成藏条件.     

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??The inclusions in diagenetic minerals of reservoirs may become the direct proof of minerogenetic conditions (temperature, salinity and composition, etc.). By use of the inclusions to research the pool-formed rules of oil and gas in Jiannan Gas Field, it is proved that the accumulation of natural gas in four commercial pools of this field occurred for Jurassic, after the Jiannan Structure had been created in Yanshan Movement and the accumulation level of natural gas in each of these pools was controlled by the matching result of the "Four Histories".     

地球化学烃场效应的探讨及应用

该文从地球化学烃场和地球化学烃场效应概念出发,论述地球化学烃场形成、演化的影响因素,探讨地球化学烃场效应的形成以及油气藏上方地球化学烃场效应的具体表现形式.认为油气藏上方与地球化学烃场效有很好的对应关系,并在实际应用工作中取得良好的勘探效果.      

利用含油气系统认识油气分布

回顾了含油气系统基本概念的发展经过及其含义,从研究内容、研究方法及侧重点几个方面对比了含油气系统与沉积盆地、成藏组合及目闭之间的区别.介绍了含油气系统的基本特征及某些分类方案,并对含油气系统的某些内容及其在油气勘探中的应用提出了一些看法.     

龚嘴水库汛期合理调度方式探讨

本文从延缓水库淤积，提高发电效率目的出发，试图就龚嘴水库汛期库区泥沙冲淤平衡，与坝前控制水位的关系进行探讨，从而提出一个根据入库流量推来坝前最佳控制水位的函数关系。从计算结果对比分析看，效果较好，方法简单易行，具有一定的实用价值。     

地质统计分析方法在鲕滩储层预测中的应用

地质统计分析方法实现了地震属性到储层岩石物性参数的转换，可以获得可靠的预测结果。针对LJZ构造鲕滩储层层多、层薄、纵横向分布不均匀等特点，利用地质统计分析方法进行了飞仙关组鲕滩储层定量预测。提取了均方根振幅和平均振幅等6种地震属性参数，选取相关性高的属性参数与井数据建立统计关系，经过内插外推得到井间物性参数平面图。地质统计分析方法预测的鲕滩储层厚度及孔隙度与井资料吻合程度较高，储层的平面分布与速度反演方法预测的鲕滩储层横向分布规律一致。     

The curvilinear integral method: computer realization and testing 1 (under non-roportional reversed axial force and torque)

The curvilinear integral method seems to be the first not to search for loading cycles; damage accumulation (and the corresponding fatigue life) is computed in terms not of cycles but of differentials of loading (on differential level). Following the classical mathematical differential-integral method, and considering the mutual change of the loading components, a differential of load change ds during dt has been defined as a short element of a ‘trajectory’ (path in appropriate coordinates). The damage differential on ds is dD. Integrating dD to D, the loading is allowed to be arbitrary: non-cyclic, nonproportional (with different component variations), and random. This feature of universality makes the method applicable to real structures for life prediction. The concept of the curvilinear integral has been published previously; this paper provides additional information and details about the mathematical and computer realization of the method and its first testing using a new program. Experimental data from LBF-Darmstadt Germany on the cast iron material GTS45 have been used, under reversed (alternating) axial and shear stresses: in phase, out of phase and of different frequencies.     

Fatigue analysis of offshore platforms subject to sea wave loadings

The fatigue damage calculation for random loading on offshore platforms takes the form of a rainflow analysis of the dynamic response of individual members to various sea states. This procedure is lengthu and consequently this paper attempts to provide a theoretical method for determining random load fatigue damage. This dynamic response for many joints leads to a broad band random loading but despite this, previous theoretical methods have simplified the loading to narrow band. This has not been done in the present case; instead, an analysis based on broad band random loading has been produced. This theoretical approach gives a fatigue life estimate which is slightly (6.6%) more conservative, for a typical example, than a rainflow analysis.