北京大学学报(自然科学版)

超低渗油气藏非对称压裂数值模拟理论及应用

吴文娟1,师永民1,王小军2,刘洪涛3,秦小双1,王磊1,柴智1,李晓敏1   

  1. 1. 北京大学地球与空间科学学院, 北京大学石油与天然气研究中心, 北京 100871; 2. 中国石油天然气股份有限公司长庆油田分公司第一采油厂, 延安 716000; 3. 中国石油天然气股份有限公司大庆油田分公司第七采油厂, 大庆 163517;
  • 收稿日期:2012-01-11 出版日期:2012-11-20 发布日期:2012-11-20

Theory and Application of Numerical Simulation of Asymmetric Hydraulic Fractures in Ultra-Low Permeability Reservoirs

WU Wenjuan1, SHI Yongmin1, WANG Xiaojun2, LIU Hongtao3, QIN Xiaoshuang1, WANG Lei1, CHAI Zhi1, LI Xiaomin1   

  1. 1. School of Earth and Space Sciences, Institute of Oil and Gas Research, Peking University, Beijing 100871; 2. The First OilProduction Plant, Changqing Oilfield Company, PetroChina, Yan’an 716000; 3. The Seven Oil Production Plant, Daqing Oilfield Company, PetroChina, Daqing 163517;
  • Received:2012-01-11 Online:2012-11-20 Published:2012-11-20

摘要: 以鄂尔多斯盆地某采油区延长组的长6油层组为例, 利用测井资料开展地质建模、三维岩石力学场和三维应力场研究, 获得井筒以外空间任一点与压裂密切相关参数的非均质网格节点数值模型。依据岩石破裂准则定量模拟计算出压裂缝的实际展布形态, 建立非对称裂缝空间分布模型, 包括缝高、缝长、缝宽和裂缝的走向。结合生产动态资料, 开展剩余油分布研究, 提出单井重复压裂措施方案。经过现场实施, 日增产原油4吨左右, 效果显著。

关键词: 水力压裂, 全缝长数值模拟, 超低渗透, 鄂尔多斯盆地

Abstract: Based on Chang-6 formation of Yanchang group in Erdos basin, built the geology, 3D rock mechanics and 3D stress field models with core and logging data, and obtained the properties of any point between wellbores. With the fracturing principle, the actual geometry of the fractures can be calculated, and the asymmetry fractures model can be built, including the length, height, width and the direction of the fractures. With the analysis of production history, the residual oil distribution can be obtained, and the multiple fracturing procedure can be designed. With the guidance of the asymmetric fracture models, the daily increase of production is more than 4 ton.

Key words: hydraulic fracturing, full-length, numerical simulation, ultra-low permeability, Erdos basin

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