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交联酸携砂酸压技术作为一种新的油气增产措施在碳酸盐岩储层中的成功应用为酸压工艺技术的发展开拓了新的领域。在酸压工艺过程中酸液对采油设备的腐蚀易使井下油管脱扣,管材突发性破裂等,造成重大的经济损失。对交联酸防腐性能的研究是评价交联酸性能指标的一种重要参数之一。根据腐蚀速率和缓蚀率的行业标准中挂片失重法,试验结果选择了醛酮铵复配的丙炔醇为主剂的缓蚀剂作为白云岩高温储层的交联酸酸压防腐添加剂。静态、高压动态测试结果表明,腐蚀速率和缓蚀率均在行业标准内。与其它酸相比缓蚀性能更好。交联酸体系、各组成及其它添加剂对缓蚀性能影响很小。现场应用表明,交联酸体系能够满足白云岩储层酸压的防腐要求。 相似文献
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企业文化建设越来越受到各企业的高度重视,正是基于企业文化释放出的源源不断的正能量,才使得企业的凝聚力和向心力进一步增强。 相似文献
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近年随着碳酸盐岩水平井的酸压改造应用越来越广泛,如何对碳酸盐岩水平井酸压效果进行准确合理的评价是目前面临的难题;本文提出利用施工曲线、酸压净压力、停泵压降的现代试井、酸压后不稳定试井等方法,同时结合试采特征,判断储层、酸压造缝特征与生产特征的相关性来评价酸压效果;通过对某井区A井的分析,对储层及酸压后裂缝特征有了较明确的认识,认为该方法具有较好的应用前景。 相似文献
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随着越来越多的复杂油气藏投入到勘探开发中,储层纵向渗透率非均质性已成为影响或制约酸压改造效果的重要因素.以储层渗透率与岩石溶蚀速率关系为基础,结合数值模拟方法及9口气井改造效果实例,综合分析了储层纵向渗透率非均质性对酸压改造效果的影响规律.结果表明,纵向渗透率分布对酸蚀沟槽的形成及导流能力有重要影响,储层纵向渗透率变异系数在0.8 ~1之间时,酸压改造模拟效果较好.实践证明当储层渗透率非均质性较强或较弱时,酸压改造效果较差;当储层纵向渗透率非均质性为中等程度时,酸压改造效果较好. 相似文献
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ZHONG Shilei 《等离子体科学和技术》2015,17(11):979-984
A newly developed approach for trace metal elements detection for aqueous samples analysis is presented in this paper. The idea of this approach is to improve ablation efficiency by transforming the liquid sample into a dense cloud of droplets using an ultrasonic nebulizer. The resulting droplets are then subjected to analysis by laser induced breakdown spectroscopy (LIBS). A purpose-built ultrasonic nebulizer assisted LIBS (UN-LIBS) system has been applied to the analysis of aqueous samples at trace levels of concentration. Experimental investigations of solution samples were carried out with various dissolved trace metal elements (Mn, Zn, Cu, Pb, Fe, Mg and Na) using this approach. The characteristics of UN-LIBS signal of the elements were investigated regarding the lifetime and S/B ratio and the calibration curves for trace metal elements analyses. The obtained LODs are comparable or much better than the LODS of the reported signal enhancement approaches when the laser pulse energy was as low as 30 mJ. The good linearity of calibration curves and the low LODs shows the potential ability of this method for metal elements analysis application. The density of the electrons was calculated by measuring the Stark width of the line of Hα. The possible mechanism of the LIBS signal enhancement of this approach was briefly discussed. 相似文献