超长钻孔爆破煤层瓦斯增透技术研究

结合双鸭山矿区集贤煤矿煤层瓦斯地质特征,通过超长钻孔施工工艺参数、爆破装药结构设计,提出超长钻孔爆破煤层瓦斯增透技术,并对瓦斯抽采工艺进行研究,最终实现集贤煤矿煤层瓦斯安全抽采。     

风积砂风电场机组基础桩型的选择

介绍了某厚层风积砂丘风电场工程地形地貌及地质特点,初步分析风电机组基础地基方案的桩型选择;通过比较不同桩型特点以及性价比、应用范围、施工工艺及相关的参数来确认风积砂丘风电机组基础桩型。论证了PHC管桩在风积砂丘风电机组基础中的优势,以及施工过程中可能出现的问题与推广应用。     

当前长江采砂执法中的问题与对策

长江采砂管理是近几年水利工作的一个热点,长江大规模非法采砂状况现虽已得到改变,但仍面临较多的问题.文章有针对性地提出了对策,并指出执法实践中的注意事项,对所涉及的若干难点法律问题进行了探讨.     

随机建模在宝浪油田宝北区块Ⅱ小层的应用

根据储层建模中布尔模拟的基本原理,详细描述了计算机上的建模流程,利用自编软件针对以辫状河道砂体沉积为主的宝浪油田宝北区块Ⅱ小层,建立了多个井间河道砂体剖面模型实现,反映出储层的非均质性,具有一定的预测效果.     

用离心模型研究港区软基变形特性

利用目前国内土工离心机中最大的内净空尺寸模型箱和 4 0 0gt大型离心机进行了港区软弱地基离心模型试验研究 ,模拟了堆场 (与码头连接段 )及下卧层在厚达 2 8m吹填粉细砂和 5 5kN m2 使用荷载作用下的沉降量、沉降差及沉降量与时间的关系 ,并测试吹填砂本身的压缩沉降量及不同深度的密实度、压缩模量和承载力变化等。试验结果表明 ,大型离心机模型试验是研究上述工程问题的有效手段 ,所得结论对合理确定地基处理方案、加固处理深度和加固程度以及吹填砂所需方量具有参考价值和指导意义。     

对大庆老区水平井水淹问题的认识

随着水平井钻井工艺水平的提高及钻井成本的降低,利用水平井技术挖潜厚油层顶部的剩余油已成为改善油田开发效果的途径之一。在对国内外水平井技术现状分析的基础上,提出了大庆老区厚油层水平井水淹问题的几点认识以及今后如何应用水平井技术的初步建议。     

下牢溪特大桥缆机占压路基开挖控制爆破技术

桥梁施工缆机占压的桥头岩质路基,紧邻桥台新浇筑砼、500kV输电线和崖下沿河公路等重要建筑。为满足工期要求,采取了分区多梯段大规模微差松动爆破技术,并加强安全防护措施,使桥台砼安全控制和飞石、滚石控制均获成功。     

疏松绿松石的无机物充填胶结改性研究

选择无机磷酸盐溶液,以浸泡-加热-保温-冷却为实验基本过程对疏松绿松石样品进行了改性实验。通过研究主要工艺影响因素在不同条件下的改善效果,选择了最佳的工艺条件。对处理前、后样品的宝石学性质（如颜色、透明度、硬度）、稳定性、化学成分、晶体结构、孔隙度以及工艺特性等进行了详细的对比分析研究。结果表明,疏松绿松石样品经处理后其颜色加深,透明度和硬度提高,结构致密,光泽加强,耐久性较好,加工工艺性能良好,可以作为首饰材料应用。处理绿松石样品的宝石学特征如折射率、荧光反应、矿物组分、红外光谱等与天然绿松石的一致,从外观上更像未处理绿松石。此改善方法主要为含磷无机物的充填胶结作用。     

FACIES HETEROGENEITIES IN A RAMP CARBONATE RESERVOIR ANALOGUE: A NEW HIGH‐RESOLUTION APPROACH FOR 3D FACIES MODELLING

In contrast to the conventional view that facies distribution patterns on carbonate ramps are relatively simple, outcrop analogue studies point to a high degree of internal facies complexity. Depending on the diagenetic overprint, this complex pattern may result in reservoir compartmentalization due to the presence of interflow baffles. The often subseismic scale heterogeneities may not be included in conventional reservoir modelling. In order to evaluate how facies heterogeneities in shoal reservoirs can be modelled realistically, this paper presents a facies modelling workflow which includes a new approach to the design of training images for multiple‐point statistics (MPS). The workflow was developed in the course of a reservoir outcrop analogue study of a Ladinian (Middle Triassic) coquinadominated shoal complex in SW Germany which was deposited on an epicontinental, gently inclined carbonate ramp. The data set was based on an intensive field study and includes 3D facies and sequence stratigraphic analyses of the largest shoal complex in the Quaderkalk Formation (Upper Muschelkalk). This several metre thick shoal complex represents a subseismic scale, bioclast‐rich reservoir analogue and has a very heterogeneous facies pattern. Integrating 1D facies logs and sequence stratigraphic trends from tens of outcrop sections and cores, two nested 3D geocellular facies models were produced: (i) a large‐scale (30 × 30 km) model based on truncated Gaussian simulation (TGS); this formed the basis for (ii) a smaller‐scale (10 × 10 km), more detailed model based on multiple point statistics. In addition, a new approach for training image design was developed to honour small‐scale sequence stratigraphic trends and lateral facies patterns observed in modern analogues. Compared to facies patterns in modern analogues, the large‐scale model presents geologically‐feasible facies distribution patterns and geometries, and in addition shows a vertical facies distribution which is similar to the observed sequence stratigraphic architecture of the outcrop data‐set used. Due to the new training image design, the final small‐scale model has a distribution pattern of facies heterogeneities which looks similar to modern facies distributions in the offshore UAE and thus represents a valuable method of producing realistic reservoir facies models. The modelling workflow and the new approach for training image design presented will help to reduce uncertainties in the understanding and modelling of subsurface reservoirs by using a systematic combination of outcrop data and modern analogues, with the consistent application of sequence stratigraphic principles. In addition, this study emphasises the importance of careful training image design, derived from modern analogues, which can be used as realistic inputs in order to optimize multiple point simulations, and which may be applied to producing bioclastic reservoirs such as those located on the Arabian Plate or offshore Brazil.     

提高薄板坯连铸生产线钢包自动开浇率的生产实践

介绍了钢包自动开浇率对薄板坯钢水纯净度的影响及影响钢包自动开浇率的各种因素,分析了引流砂质量、引流砂加入方式、上水口情况及钢水在钢包中停留时间对钢包自动开浇率的影响。通过采取一系列有效措施,唐钢薄板坯生产线钢包自动开浇率达到了98．5％以上。