水平井滑套分压工艺技术及现场应用

针对目前国内外低渗透油田水平井压裂改造工艺复杂、工艺可靠性差的现状,研究试验了水平井滑套分段压裂工艺及配套技术,经现场试验及应用,该管柱性能可靠,满足水平井分段压裂要求.水平井选层压裂工具总成实现了坐封、工作、解封全过程液压动作,由其组成的工艺管柱入井工具少,性能稳定,并形成了事故卡井打捞配套技术,使施工更加安全可靠,是一种先进的水平井分段改造工艺技术.     

基于周期交替电流扰动的孤岛检测方法

对于分布式电源并网系统，当电网断电时可以使用主动频率偏移法检测孤岛效应。但是，若在非检测区内电流扰动角与负载角相匹配，则主动频率偏移法将出现无法识别孤岛效应的问题。针对上述问题，文中提出了一种新颖的基于周期交替电流扰动的孤岛检测方法。在保证扰动电流与公共耦合点电压同步前提下，前一个周期扰动电流频率向上偏移，当前周期扰动电流频率向下偏移。根据公共耦合点电压频率是否周期高低交替变化来识别孤岛现象。经过仿真和实验验证，该方法不但可以准确识别孤岛效应，而且解决了主动频率偏移法存在的非检测区问题。     

准噶尔盆地南缘山前带激发因素分析

：改善野外单炮资料品质就是要提高单炮的能量，保护高频能量，提高信噪比。激发药量、井深及激发层速 度是改善野外单炮资料品质的３个关键因素。通过对准噶尔盆地南缘灰岩及黄土夹砾石区的激发因素的分析 研究，确定了较为合理的激发药量及井深与激发层速度的匹配关系。     

增湿路径对非饱和土水气渗透系数的影响研究

对水气运动联合测定的方法，提出了3种渗水稳定时间判定方法及3种渗水驱动势的计算方法。对同一干密度的试样，进行不同增湿路径的渗透试验，分析了不同的渗水稳定时间判定方法、渗水驱动势计算方法对渗水系数的影响，得出考虑渗水驱动势随时间变化的变水头计算方法最为合理和稳定。进而以变水头计算方法为基础，分析了增湿路径对水气渗透系数测定值的影响。结果表明，增湿路径对渗水系数的影响总体不大，而在较高饱和度范围内对渗气系数的影响较大。     

Fracture process zone of notched three-point-bending concrete beams

By measuring and analyzing the load-deflection curve and acoustic emission characteristics of notched three-point-bending concrete beams with different notch depths, the length of the fracture process zone (FPZ) was calculated from the difference between the equivalent crack lengths obtained by different kinds of equivalence. Then, the evolution of the FPZ was quantitatively described. It was found that length of the FPZ is not a material parameter; it is greatly influenced by the specimen size. But in a relative sense, the influence of the specimen size can be eliminated. Also, the evolution of the FPZ in specimens of different sizes is almost the same. When the crack length is small, the FPZ increases linearly with the crack extension. As the crack extends to half of the ligament, the FPZ reaches its maximum size. Thereafter, the FPZ moves ahead and shrinks, but the ratio of its length to the length of the residual ligament remains constant, approximately equal to 0.77.     

Stress variation of soil surrounding tunnel and grouting reinforcement effect based on stress release

With FLAC, a criteria of stress release ratio （SRR）, i.e., about 10% of the relative difference of the ground settlement before and after the supporting system is installed, is incorporated into stress release method （SRM）. At the same time, the Mohr-Coulomb Criterion is used to analyze stress changes around the tunnel induced by excavation. It shows that the surrounding soil around shallow tunnels can be partitioned by loosened zones （unloading zones） and plastic zones among which the shear stresses in the soil are less than 10 kPa below the M-C yield line. Both types of zones are separated. With the increasing of the SRR, the areas of plastic zones and loosen zones gradually increase. The surrounding soil is equally divided into 24 regions in order to study the influence of different grouting regions on the ground settlement. The reinforcing effect of grouting can be modeled by enhancement of the soil strength around the tunnel. By the approach of the SRM, numerical analysis indicates that, in the upper area （top of the surrounding soil about 210°）, the reinforcing effect gradually decreases as the reinforcing region moves from arch springing to the vault of the crown; when reinforcing regions lie in the upside of the surrounding soil, the influence on the ground settlement is generally greater than in the lower part; at the same time, with the increase of the SRR, the influential differences are more and more obvious.     

某大型住宅小区的智能化设计方案

本文简要介绍了某大型住宅小区的智能化设计。     

走滑断层作用对南堡凹陷油气成藏的控制

综合利用地震、重力、钻井等资料,对南堡凹陷柏各庄断裂和西南庄断裂进行重新认识,分析构造变形对南堡凹陷油气成藏的控制作用.柏各庄断裂和西南庄断裂在深部合并成一条基底断裂(柏各庄-西南庄断裂),具走滑断裂性质,该基底断裂在燕山期发生明显的左行走滑并持续到古近纪沙河街组沉积期,对沙河街组沉积有明显的控制作用.南堡凹陷古近纪成盆演化主要受柏各庄-西南庄基底断裂左行走滑活动控制,属于走滑-伸展凹陷.新近纪以来的断层走滑活动,形成了北东向和北西向两组共轭剪切走滑断层带,控制了二级构造带的展布.南堡凹陷油气大量成藏期与新近纪以来的断层活动期相吻合.利于油气运移及圈闭的形成,油气沿断裂带纵向多层系分布.     

非饱和土力学理论在南水北调工程中的应用

简要回顾了非饱和土力学的研究历史及研究意义.结合南水北调中线工程中的膨胀土问题,探讨了非饱和土理论在渠道工程设计中的应用前景,重点论述了非饱和土抗剪强度理论及其简化计算方法,并从膨胀土的破坏机理、变形特点和强度特征出发,探讨了膨胀土渠坡工程处理措施和处理原则,为南水北调中线工程膨胀土渠段的设计和施工开拓了新的思路.     

川北阆中-南部地区茅口组礁滩相储层预测

四川盆地北部阆中-南部（地名）地区处于川北坳陷与川中隆起的斜坡部位，具有优越的油气成藏条件。下二叠统茅口组沉积时处于台地边缘相带，东吴运动使其顶部长时间暴露地表。这种沉积环境不仅在沉积期有利于礁滩相岩溶改造型储层的发育，而且在成岩期也有利于建设性成岩作用的发生，同时还有利于裂缝的发育，因而对茅口组礁滩相储层进行预测对本区油气勘探具有重要的意义。参考川东北普光地区上二叠统长兴组储层的地震响应特征，结合本区茅口组储层特征，对研究区储层地震响应的特征进行了分析，并指出了茅口组有利的储层发育带：位于工区西南部呈NW-SE条带状展布的礁滩相储层。