基于三维模型的低渗透非均质储层单砂体全缝长压裂改造与剩余油挖潜

发布时间：2018-02-26 06:17

本文关键词： 鄂尔多斯盆地非均质储层单砂体岩石力学模型全缝长压裂剩余油挖潜　出处：《中国石油大学学报(自然科学版)》2017年03期 　论文类型：期刊论文

【摘要】：考虑到对陆相非均质储层压裂缝扩展规律及储层改造程度认识不足,首先通过测井曲线对鄂尔多斯盆地王窑区块目标层段进行单砂体细分,采用常规测井、特殊测井与沉积微相特征结合开展油藏三维物性与岩石力学场建模,其次进行随井间储层和应力场变化的全缝长压裂数值模拟,最后通过裂缝的展布情况与油田动态数据结合,对非均质储层动用程度进行分析。研究认为三角洲前缘多期河道侧向叠置砂体储层单砂体在垂向差异大,侧向变化快,因此须突破传统的压裂数值模拟方法,基于实际三维模型的单砂体全缝长压裂模拟更为合适。所提方法在鄂尔多斯盆地实施后增产效果明显,实施井次成功率高达90%以上,平均日增油2 t以上,说明该方法可应用于低渗非均质储层开发中后期的剩余油挖潜。
[Abstract]:Considering the lack of understanding of the fracture propagation law of continental heterogeneous reservoir and the degree of reservoir reconstruction, the target formation of Wangyao block in Ordos Basin is subdivided by logging curve, and conventional logging is used. Combined with special logging and sedimentary microfacies, 3D reservoir physical properties and rock mechanics field modeling are developed. Secondly, numerical simulation of full-fracture long fracturing with variation of interwell reservoir and stress field is carried out. Finally, the distribution of fractures is combined with oilfield dynamic data. Based on the analysis of the production degree of heterogeneous reservoir, it is considered that the single sand body of delta front multi-stage channel lateral superimposed sand reservoir has great vertical difference and fast lateral variation, so it is necessary to break through the traditional fracturing numerical simulation method. It is more suitable to simulate the whole fracture length fracturing of single sand body based on the actual 3D model. The effect of the proposed method is obvious after the implementation of this method in Ordos Basin. The success rate of well number of wells is more than 90% and the average daily oil is more than 2 tons. It shows that this method can be used to tap the potential of remaining oil in the middle and late stage of development of low permeability heterogeneous reservoir.
【作者单位】：北京大学地球与空间科学学院;中国石油大学计算机与通信工程学院;中石油长庆油田分公司第一采油厂;
【基金】：国家重大科技专项(2016ZX05013005-009)
【分类号】：TE357

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