碳酸盐岩油藏缝洞单元离散数值模型及压力响应曲线特征

发布时间：2018-06-06 04:30

本文选题：碳酸盐岩油藏 + 缝洞　；参考：《科技导报》2017年14期

【摘要】：缝洞型碳酸盐岩油藏储集体类型多样,如何充分利用试井测试资料认识钻遇储层特征是后期挖潜增产的关键,并且常规解析试井模型中无法考虑井与缝洞的位置关系导致解释结果误差较大。为此,根据缝洞单元内缝洞与井的分布特征,分别建立了井钻遇和未钻遇缝洞2种离散数值试井模型,并进行有限元求解,分析了缝洞体大小以及缝洞体与井之间距离对井底压力响应曲线的影响。采用该方法对塔里木哈拉哈塘油田14口井测试资料进行试井分析,结果表明,受缝洞体的影响,井底压力响应曲线特征可分为:缝洞发育-未钻遇缝洞-井在缝洞附近、缝洞发育-钻遇缝洞、钻遇多个连通的缝洞、基质为主-缝洞不发育以及缝洞不发育-钻遇个别缝洞5种类型。
[Abstract]:There are various reservoir types in fractured and cavernous carbonate reservoirs. How to make full use of well test data to recognize the characteristics of drilling and meeting reservoir is the key to tapping potential and increasing production in the later stage. In the conventional analytical well test model, the position relationship between well and fracture cavity can not be considered, which leads to the error of interpretation result. For this reason, according to the distribution characteristics of fractures and cavities in fracture-cavity units, two discrete numerical well test models, drilling and undrilling, are established and solved by finite element method. The effect of the size of the fracture cavity and the distance between the fracture and the well on the bottom hole pressure response curve is analyzed. By using this method, the well test data of 14 wells in Hala Hattang Oilfield of Tarim were analyzed. The results show that the bottom hole pressure response curve characteristics can be divided into fracture-cavity development, undrilled fracture-hole and well near fracture-cavity, the results show that the borehole pressure response curve can be divided into two parts: fracture cavity development, undrilled fracture hole and well near fracture cavity. There are five types of cracks and cavities: the development of cracks and cavities, the occurrence of multiple connected cracks and cavities, the development of matrix, the undeveloped of cracks and cavities, and the occurrence of individual fractures and cavities.
【作者单位】：中国石油塔里木油田公司勘探开发研究院;中国科学院力学研究所;中国科学院大学;
【基金】：国家科技重大专项(2011ZX05004-004)
【分类号】：TE344

【相似文献】