提高煤层气采收率的方法和技术进展

本文主要综述了现有提高煤层气采收率的方法和技术的研究进展。结果表明,研究将提高石油采收率领域常用的一种成熟技术——热力促采法,迁移到提高煤层气采收率领域的可行性和适用性条件,对于验证油气领域相关理论和方法等基础研究领域以及拓展煤层气开采新技术、新工艺等工程实践领域具有重要的科学意义。

浅述石油开采中增产技术的运用

石油是社会发展中必不可少的能源之一。经济的快速发展对石油的需求量也在不断增加,因此,提高石油产量是非常重要的。要想提高石油产量,就要使用恰当的增产技术。简要介绍了石油开采过程中使用的增产技术,以期为日后的相关工作提供参考。

Simulation of goaf heating law and the fire cooling effect during methane drainage in high level laneway

For spontaneous combustion possibilities under large flux methane drainage in the goal, dynamic permeability in combination with the Forchheimer nonlinear equation was used to solve the problem of 3D oxygen distribution, heating law in goaf and to forecast the effects of fire protection by taking the fifth section face of the No. 18 coal seam in Nanshan Coal Mine as the basis for this study. The results demonstrate that if the vertical position of the drainage laneway is so low as to cause serious air leakage, a high oxygen concentration area exists in the return side of the goaf, and there is also a high temperature region which has faster heating rate than in the other areas. The effect of methane drainage on goal heating can be alleviated dramatically by simultaneous plugging and nitrogen injection. The results show that gas data in the return side of the goaf must be detected carefully in the work face, which is of similar drainage arrangement. Therefore, comprehensive fire protection measures should be carried out if conditions permit.

碳酸盐岩储层高黏原油难采储量开发前景

碳酸盐岩储层高黏原油难采储量开发是现今石油开采领域中普遍存在的一大难题,本文以鞑靼共和国的斯捷普诺耶奥泽罗油田碳酸盐岩油藏为例,建立地质数值模型,模拟了周期性交替注热水-冷水热采法和周期性交替注热水-聚合物热采法,并与水驱方法在提高原油采收率上进行了对比。

石油开采中的增产节能技术

石油在国民经济及社会发展中起着极其重要的作用。热采对于维持石油产量的稳定提高,尤其是挖掘粘稠油藏的开采潜力有着重大影响.不同的热采工艺对于石油采收率及投资运行成本影响不同。文中对各种热采工艺进行了分析比较。

Load Frequency Control of a Two Area-Power System with Non-reheat Turbines by SMC Approach

Load frequency is an important issue in power system operation and control. In this paper, load frequency control for suppression frequency deviation in an interconnected power system with nonlinearities using SMC （sliding mode control） is studied. The governor dead band and GRC （generation rate constraint） is considered in this article. Digit simulations for both two areas and three areas power system with non-reheat turbines are provided to validate the effectiveness of the proposed scheme. The results show that, the robustness of the control method under parameters variation and different load disturbances with the SMC technique.

影响提高采收率(EOR)成功的因素

提高采收率（EOR）的定义是指提高效率。用混相法或热采法可降低界面张力，以此降低残油饱和度来提高微观驱油效率。改善体积效率和采用打加密井、降低水气流度比或通过有选择性地堵塞高渗透率通道降低油藏非均质性等方法。