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影响砂岩酸化效果的几点认识 总被引:1,自引:0,他引:1
酸化在石油勘探与开发中早已被广泛应用,就其效果而言,碳酸盐岩地层成功率最高,增产增注幅度也大。砂岩地层效果就远不如碳酸盐岩地层,这在酸化机理上已不难理解。但同是砂岩地层其酸化效果也不一样,且差别较大,其中油井和注水井酸化效果差异更大,本文在理论研究和大量实践经验的基础上对影响砂岩酸化效果的原因进行了分析研究,提出了各种提高砂岩酸化效果的建议措施。 相似文献
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接力式酸降压增注工艺技术的应用 总被引:1,自引:1,他引:0
刘中信 《石油与天然气化工》2004,33(6):440-441
酸化是油气井增产和水井增注的主导措施之一。介绍了采用三种自生酸原液在地层条件与催化抑制剂作用下生成氢氟酸、盐酸、有机酸 ,进而发生酸岩反应的一种接力式酸降压增注工艺。该技术已在胜利油田、中原油田、河南油田等成功解堵 30余井次。 相似文献
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大庆杏南油田注水井压裂酸化效果预测模型研究 总被引:2,自引:0,他引:2
水力压裂与酸化技术是油气井增产、水井增注的一项重要技术措施,对于低渗透油田,通过压裂、酸化技术提高注水井增注强度,不仅可以提高单层的注入量,而且可以调整层间矛盾,因此,对保持地层压力,提高采油速度和采收率都具有十分重要的意义。通过对注水井压裂、酸化前后注水量递减规律的分析,在对大庆杏南油田189口注水井注入量的变化进行统计基础上,建立了注水井注水量与各种主要影响因素的函数关系,通过拟合计算证明该模型适应杏南油田注水井压裂、酸化效果的预测。 相似文献
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基质酸化是油气井增产和增注的重要措施,而储层孔隙和裂缝是两个彼此独立且又相互联系的水动力学系统。文章针对碳酸盐岩储层基质酸化时酸在裂缝性-孔隙系统中的流动反应特点,建立燕完善了裂缝性碳酸盐基质酸化设计计算模型,模型中考虑了酸液的非稳态渗流、地层温度、反应热和天然裂缝分布等多种因素的影响。在计算方法处理上改变原来采用积分方法计算一阶Bessel函数的方法,提出了一种全新的计算一阶Bessel函数的经验计算公式,该方法能保证高的计算精度和计算速度。并在此基础上研制了基质酸化设计软件,模拟计算结果表明,模型可靠,计算方法合理,能较好地模拟裂缝性碳酸盐岩储层基质酸化过程,可用于基质酸化设计和优化施工参数。 相似文献
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孤岛油田解堵常用的酸液体系和防治酸化失效的对策 总被引:1,自引:0,他引:1
井底酸化是油井增产、水井增注的重要措施。论述了砂岩油藏解堵注常用酸液体系的原理、特点及适应性。分析了常见部分油水井酸失效的原因,提出了防治酸化失效的一些措施,介绍了孤岛油田酸化工艺的应用情况,得出一些有益的结论和认识。 相似文献
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酸化是碳酸盐岩和砂岩地层油气井获得增产的常规措施,以往许多地区的油气井酸化处理增产效果不理想,主要是由于使用了常规酸液以及不适当的室内试验及设计程序。本文提出一种模拟井下条件的酸/油乳化和酸渣试验方法,这是进行有效酸化设计的关键。该研究程序改进了酸化处理的试验、设计、质量控制和作业评估技术,增产效果证明这些新的质量控制和设计方法是成功的。 相似文献
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《Oil and Energy Trends》2008,33(5):6-7
This section summarizes downstream developments of the previous month. Exploration & Production are covered in 'Upstream Review'.
An upsurge of violence in Iraq threatened a recovery in output that began earlier this year. Production in the northern fields hit a post-invasion high of 620,000 bpd in March, rising by 180,000 bpd in one month. Fighting in the south, however, cut production there by more than 100,000 bpd as government troops tried to subdue Shi'ite militias in and around Basrah. Oil installations damaged in the south included a pipeline and a pumping station. The Iraqi government nevertheless announced that oil production would reach 2.9 mn bpd by the year's end, requiring an increase of nearly 500,000 bpd over April 2008 levels. Foreign help is to be sought via a series of technical service agreements and - later this year - an upstream licensing round. Japan's Ministry of Economy, Trade and Industry says it wants a bigger role for Japanese oil companies in both the upstream and downstream sectors in Iraq. Kurdistan says it is negotiating with Baghdad to export oil produced from new oil fields there. The central government does not recognize production agreements drawn up by the Kurdistan Regional Government. The EU - desperate for gas to fill its Nabucco pipeline - has approached Iraq for up to 1 bn cfd. 相似文献
An upsurge of violence in Iraq threatened a recovery in output that began earlier this year. Production in the northern fields hit a post-invasion high of 620,000 bpd in March, rising by 180,000 bpd in one month. Fighting in the south, however, cut production there by more than 100,000 bpd as government troops tried to subdue Shi'ite militias in and around Basrah. Oil installations damaged in the south included a pipeline and a pumping station. The Iraqi government nevertheless announced that oil production would reach 2.9 mn bpd by the year's end, requiring an increase of nearly 500,000 bpd over April 2008 levels. Foreign help is to be sought via a series of technical service agreements and - later this year - an upstream licensing round. Japan's Ministry of Economy, Trade and Industry says it wants a bigger role for Japanese oil companies in both the upstream and downstream sectors in Iraq. Kurdistan says it is negotiating with Baghdad to export oil produced from new oil fields there. The central government does not recognize production agreements drawn up by the Kurdistan Regional Government. The EU - desperate for gas to fill its Nabucco pipeline - has approached Iraq for up to 1 bn cfd. 相似文献
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