酸性气藏地下储气库采出气组分变化规律研究——以鄂尔多斯盆地陕224储气库为例

发布时间：2018-02-20 19:33

本文关键词： 鄂尔多斯盆地靖边气田地下储气库酸性气体注采试验组分模型数值模拟变化规律　出处：《天然气工业》2017年08期 　论文类型：期刊论文

【摘要】：在酸性气藏改建地下储气库方面,国内外尚无相关成熟经验可供借鉴,研究酸性气体在地下储气库注采生产过程中的组分变化规律对指导该类储气库生产运行具有重要意义。为此,以鄂尔多斯盆地陕224储气库为例,简要阐述了研究区块内酸性气体的成因,建立了酸性气体组分模型,预测了酸性气体在注采过程中的组分变化规律,并通过直井和水平井注采试验对组分预测结果进行验证。结果表明:①直井和水平井注采试验验证了组分模型预测酸性气体含量的变化趋势,注采试验对研究区块酸性气体进行淘洗,使该区块酸性气体含量整体下降,在今后的注采周期内采出气酸性气体含量会越来越少,最终能达到国家二类商品气标准;②同一周期采气初期,酸性气体含量较低,随着采气量的增加,酸性气体含量也会增加;③在第1个注采周期酸性气体含量下降较多,在不同注采周期采气初期会有一定时间的安全生产期;④注采气量的差异导致了酸性气体分布的不均衡性,注气量多的地方采出气酸性气体含量较低,注气量少的地方,采出气酸性气体含量高。
[Abstract]:There is no relevant mature experience at home and abroad for the conversion of acid gas reservoirs to underground gas reservoirs. It is of great significance to study the variation law of acid gas components in the process of underground gas storage production. Therefore, taking Shaanxi 224 gas storage reservoir in Ordos Basin as an example, it is of great significance to guide the production and operation of this kind of gas storage reservoir. The cause of formation of acid gas in the study block is briefly described, the component model of acid gas is established, and the law of component variation of acid gas in the process of injection and production is predicted. The component prediction results are verified by injection and production tests in vertical well and horizontal well. The results show that the component model can predict the change trend of acid gas content. The acid gas content in the study block will be reduced by injection and production test, and the acid gas content will be less and less in the future injection and production cycle. At the beginning of the same cycle, the acid gas content is lower. With the increase of gas production rate, the acid gas content will increase, and the acid gas content will decrease more in the first injection-production cycle. The difference of gas injection and gas production rate during the safe production period in different injection and production cycles will lead to the uneven distribution of acid gas, where the content of acid gas is lower and the quantity of gas injection is low in the place with more gas injection. The acid gas content is high.
【作者单位】：中国石油长庆油田分公司储气库管理处;
【基金】：中国石油天然气股份有限公司科学研究与技术开发项目“地下储气库关键技术研究与应用”(编号:2015E-400201)
【分类号】：TE972.1

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