低渗透油藏爆炸压裂产能分析及压裂改造区域优化设计  

Production analysis and optimal design of explosive fracturing technology for low permeability reservoir

作　　者：刘静华[1] 韩国庆[1] 景紫岩 

机构地区：[1]中国石油大学(北京)石油工程学院,北京102249 [2]中国石油勘探开发研究院西北分院,甘肃兰州730000

出　　处：《爆炸与冲击》2016年第2期224-229,共6页Explosion and Shock Waves

摘　　要：基于爆炸压裂裂缝分布规律,提出爆炸压裂缝网双重介质复合流动产能模型,应用Laplace变换Stehfest数值反演,得到了定压条件下封闭外边界低渗透油藏爆炸压裂生产井产能表达式。在模型正确性验证的基础上结合某低渗透油藏储层特征参数研究了爆炸压裂改造区域参数对封闭边界油藏产量的影响,同时对爆炸压裂改造改造体积优化设计进行了研究。研究结果表明,爆炸压裂改造区域半径主要影响生产中期产能,改造区域渗透率对生产早期和中期影响比较大,且对于实例油藏爆炸压裂改造比为0.1时效果最好。The explosive fracturing technique is often adopted to produce and expand fractures due to its great shock waves, thus improving the low permeability of oil reservoirs. Based on the distribution characteristics of the explosive fracturing network and applying the Laplace transform and the Stehfest numerical inversion, this paper presents a new analytic mathematical production model for the com- plex-flow to an explosive fracturing well and obtains the formulas for the oil output under the con- stant pressure in different boundary conditions. On the basis of the model validation, this paper inves- tigates the influence of the fracture network parameters on the output and the optimal design of the explosive fracturing. It is shown that the permeability of the fracture network exerts a great influence on the production. In addition, this paper offers an optimal design for explosive fracturing. The re- suits from this study are expected to be significantly helpful for the optimal design of explosive fractu- ring and provide a rational design about the explosive quantity in low permeable reservoirs.

关 键 词：爆炸力学 爆炸压裂 复合流动模型 改造区域半径 优化设计 低渗透油藏 

分 类 号：O383[理学—流体力学] TE122.1[理学—力学]