酸化中酸岩反应潜在的伤害研究

发布时间：2018-08-29 17:17

【摘要】：酸化与压裂是油气田重要的增产措施,目前,酸化和压裂已得到我国的广泛应用,但是,在为油气田实现增产效果的同时也产生了一些负面效果,如会产生储层伤害问题。工作液与储层岩石及流体不配伍,便会发生微粒堵塞孔吼与水敏性粘土矿物膨胀等现象。另外,基质酸化后的二次沉淀物,如果施工参数不科学,那么将会严重伤害储层。要想实现保证采油效果时最大程度的保护储层的目的,就需要对酸化中酸岩反应潜在的伤害进行深入的研究。对于酸化中酸岩反应潜在的伤害的研究一般以室内试验评价为主较多,但实验方法仅能得出定性或半定型的结论,并不能有效的解决该问题,本文针对储层改造中效果不理想的问题,运用理论分析方法和数学模拟方法对由增产液导致储层伤害的因素进行了研究。在理论分析上,本文主要以酸—岩反应机理为出发点,对酸化时酸液与储集层岩石及流体的配伍性、粘土矿物膨胀、二次沉淀、酸液滤失及微粒运移等存在的伤害因素对储集层的损害进行分析。同时,本文提出了增产作业中储层损害定量预测的数学模拟研究方法,着重建立了二次沉淀和粘土膨胀影响下的渗透率和孔隙度的模型,得出了较为实用相应算法。通过本文大量调查研究工作,提出了储层损害的对应解决方案,为油气田开发中储层保护提供了一定的建议。
[Abstract]:Acidizing and fracturing are important measures to increase production in oil and gas fields. At present, acidizing and fracturing have been widely used in China, but at the same time, it has produced some negative effects, such as reservoir damage. If the working fluid is not compatible with the reservoir rock and fluid, the phenomenon of particle plugging and water sensitive clay mineral expansion will occur. In addition, the secondary sediment after matrix acidification will seriously damage the reservoir if the construction parameters are not scientific. In order to protect reservoir as much as possible, it is necessary to study the potential damage of acidite reaction in acidizing. The research on the potential damage of acidite reaction in acidizing is mainly in laboratory test evaluation, but the experimental method can only get qualitative or semi-stereotyped conclusions, and can not effectively solve this problem. Aiming at the problem that the effect of reservoir reconstruction is not ideal, this paper studies the factors of reservoir damage caused by increasing production fluid by using theoretical analysis method and mathematical simulation method. Based on the acid-rock reaction mechanism, the compatibility of acid solution with reservoir rock and fluid, clay mineral expansion and secondary precipitation are studied in this paper. The damage caused by acid filtration and particle migration is analyzed. At the same time, this paper puts forward a mathematical simulation method for quantitative prediction of reservoir damage in production increasing operation. The model of permeability and porosity under the influence of secondary sedimentation and clay expansion is established, and a more practical algorithm is obtained. Through a great deal of investigation and research in this paper, the corresponding solution of reservoir damage is put forward, which provides some suggestions for reservoir protection in oil and gas field development.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE357.2

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