通过对模拟工况环境中耐温铝合金牺牲阳极的电化学腐蚀行为和性能参数测试,探讨其在井筒环境中的适用性.结果表明:随着温度升高,耐温铝合金阳极自腐蚀电位明显负移,自腐蚀速率增大,在20、40、60和80℃时的自腐蚀速率分别为0.1097、0.1235、0.1378、0.1835 mm/a.耐温铝合金阳极在20、40、60和80℃条件下的活化电位分别为-1108、-1105、-1082、-1022 mV;工作电位则分别为-1100、-1080、-1060、-990 mV,其值高于相应温度下的破钝电位,并且在高达80℃的条件下,工作电位也低于有效阴极保护电位,电流效率仍保持在70％以上.耐温铝合金阳极不仅能够提供良好的阴极保护效果,而且自腐蚀腐蚀速率较低.

按照公司节能要求,将系统效率低、能耗高的董志和白马南区块定为节能改造区.通过分析节能改造区机采现状存在的问题,在董志和白马南区块进行机采井系统效率远程控制技术现场改造试验,对比改造前后系统效率数据和井组电表计量数据,评价改造效果.改造后,节能改造区系统效率提高1.55％,日耗电量减少5426.9 kWh,综合节电率为24.1％,节能效果明显.通过安装电表进行验证,选取5个井场19口井,实测综合节电率24.5％,控制柜电参分析综合节电率24.6％,控制柜电参分析具有较高的准确性和可靠性.提出了机采井系统效率远程控制技术改造的合理化建议,为我厂节能改造提供技术支撑.

Through SEM indoor experiments of coal-rock, this paper quantitatively describes the parameters of fractures such as length, width, height, density of fractures, establishes quantitative evaluation parameter for fracture permeability, and its influencing factors are studied. The results show that the advantage fracture direction is NE, while the EW direction or NW direction fractures develop in local structural complex area. And the fracture groups are mainly parallel with each other and lie in NW direction, occasional oblique in NW direction. And cross or winding fractures develop in local areas and some fractures are filled with clay mineral and calcite. The length and height of main and secondary fractures of coal rock are similar, and the width and density of secondary fractures are obviously lower than that of main fractures. The fracture permeability index proposed in this paper can effectively characterize the permeability of fractures, and the permeability increases with the increase of the fracture permeability index. When the fracture permeability index is greater than 150, it is a favorable area for CBM development. When the fracture permeability index is less than 100, it is necessary to adopt horizontal well fracturing technology to improve the development effect.

本文提出将闲置螺杆泵锥螺纹抽油杆当普通抽油杆使用，并进行了可行性理论计算，通过配套Φ25锥*Φ22直变径接箍，使锥螺纹抽油杆能够和普通抽油杆连接。在城壕作业区开展试验，应用了4口井，4口井生产正常而且检泵周期得到了延长。