西南石油大学学报(自然科学版)

• 石油与天然气工程 • 上一篇    下一篇

页岩气藏压裂水平井渗流数值模型的建立

郭小哲1,周长沙2   

  1. 1. 中国石油大学(北京)石油工程学院,北京昌平102249
    2. 中国石化东北油气分公司,吉林长春130062
  • 出版日期:2014-10-01 发布日期:2014-10-01

Seepage Numerical Model for Fractured Horizontal Well in Shale
Gas Reservoir

Guo Xiaozhe1, Zhou Changsha2   

  1. 1. College of Petroleum Engineering,China University of Petroleum(Beijing),Changping,Beijing 102249,China
    2. Northeast Petroleum Bureau,SINOPEC,Changchun,Jilin 130062,China
  • Online:2014-10-01 Published:2014-10-01

摘要:

水力压裂后的页岩气藏水平井渗流区域内储层呈现复杂的裂缝网络形态,考虑解吸–吸附机理的单井渗流数
值模型的建立对单井产能影响因素分析具有较强的理论价值和现实意义,基于Warren-Root 双重介质模型思想,建立
了考虑解吸–吸附的基质渗流数学模型和裂缝渗流数学模型,并进行了差分离散方法的设计及渗流方程的IMPES 方
法线性化处理,最后实现了通过Gauss-Seidel 迭代编程模拟。现场应用中,在页岩储层水平井压裂时的微地震结果基
础上构建了地质模型,所建立的数值模型可分析压力、吸附气量、渗透率、地层物性等多个参数特征对生产的影响,并
与页岩气产出规律相符,因此该简便模型可有效指导现场的工程设计及动态分析。

关键词: 页岩气, 水平井, 压裂, 数值模拟, 缝网, 双重介质

Abstract:

After the hydraulic fracturing of horizontal wells,shale gas reservoir seepage areas show a complex fracture net- work
morphology,single well flow numerical model considering desorption-adsorption mechanism has a strong theoretical value and
practical significance for analyzing single well production factors. Based on Warren-Root dual media model guiding ideology,
matrix flow mathematical model and fracture flow mathematical model are established considering desorption-adsorption.
Methods of discrete differential equations is designed and IMPES seepage linear processing method is carried out,and finally
iterative simulation programming is realized through the Gauss-Seidel. Field applications,based on the results of the microseismic
for fractured horizontal wells in shale reservoir geological model was constructed,the established numerical model
can analyze the impact of pressure,gas adsorption,permeability,formation properties and other characteristics on production
parameters. The results are consistent with the law of shale gas production,so this simple model can effectively guide the field
of engineering design and dynamic analysis.

Key words: shale gas, horizontal well, pressing crack, numerical modeling, fracture block, dual media