西南石油大学学报(自然科学版) ›› 2020, Vol. 42 ›› Issue (5): 107-117.DOI: 10.11885/j.issn.1674-5086.2020.04.10.01

• 石油与天然气工程 • 上一篇    下一篇

致密气藏多级压裂水平井生产动态机理分析

张博宁1, 张芮菡2, 吴婷婷3, 鲁友常4   

  1. 1. 成都北方石油勘探开发技术有限公司, 四川 成都 610051;
    2. 油气藏地质及开发工程国家重点实验室·西南石油大学, 四川 成都 610500;
    3. 中国石油西南油气田公司勘探开发研究院, 四川 成都 610041;
    4. 四川页岩气勘探开发有限责任公司, 四川 成都 610041
  • 收稿日期:2020-04-10 出版日期:2020-10-10 发布日期:2020-10-10
  • 通讯作者: 张芮菡,E-mail:ruihanzhang_swpu@foxmail.com
  • 作者简介:张博宁,1993年生,男,汉族,四川成都人,工程师,硕士,主要从事油气藏工程方面的研究。E-mail:zhangboning@zhenhuaoil.com;张芮菡,1989年生,男,汉族,四川仁寿人,讲师,博士后,主要从事油气藏渗流理论和数值模拟理论、方法的教学和研究工作。E-mail:ruihanzhang_swpu@foxmail.com;吴婷婷,1989年生,女,汉族,重庆丰都人,工程师,主要从事油气藏数值模拟方面的研究。E-mail:wtting@petrochina.com.cn;鲁友常,1964年生,男,汉族,四川仁寿人,高级工程师,主要从事油气田地面建设和页岩气开发生产管理工作。E-mail:luyouchang@petrochina.com.cn
  • 基金资助:
    国家自然科学基金(51534006)

Mechanism Analysis of the Production Performance of Multi-stage Fractured Horizontal Well in Tight Gas Reservoir

ZHANG Boning1, ZHANG Ruihan2, WU Tingting3, LU Youchang4   

  1. 1. Chengdu North Petroleum Exploration and Development Technology Company Limited, Chengdu, Sichuan 610051, China;
    2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    3. Research Institute of Exploration and Development, Southwest Oil & Gas Field Company, PetroChina, Chengdu, Sichuan 610041, China;
    4. Sichuan Shale Gas Exploration and Development Co. Ltd., Chengdu, Sichuan 610041, China
  • Received:2020-04-10 Online:2020-10-10 Published:2020-10-10

摘要: 为准确预测致密气藏多级压裂水平井在非线性渗流和复杂裂缝下的生产动态特征,通过双重连续介质-离散裂缝耦合模型对原始致密储层和水力压裂裂缝系统流动特征进行刻画并构建综合渗流数学模型,采用非结构三维四面体网格和控制体积-有限元方法建立全隐式数值模型,并通过修正Peaceman方法建立复杂压裂水平井数值井模型,从而获得准确的数值解。开展含水饱和度、应力敏感系数、压裂裂缝压开程度和空间非对称分布等关键参数对X致密气藏某区块压裂水平井生产动态的影响因素分析。研究表明,该模拟方法能准确预测致密气藏压裂水平井生产动态特征,为致密气藏的高效开发提供理论支撑和计算工具。

关键词: 致密气藏, 多级压裂水平井, 气水两相流动, 控制体积-有限元法, 数值模拟

Abstract: In order to accurately predict the production performance of multi-stage fractured horizontal wells in tight gas reservoirs under the nonlinear flow mechanisms and complex fracture distribution characteristics, the dual continuum discrete fracture coupling model is used to describe the flow characteristics of original tight reservoirs and hydraulic fractures, and a comprehensive flow mathematical model is constructed. The unstructured 3D tetrahedron mesh and control volume finite element method are used to establish the fully implicit numerical model, and the modified Peaceman method is used to establish the numerical well model of complex fractured horizontal wells, so as to obtain accurate numerical solutions. The influences of some key parameters such as water saturation, stress sensitive coefficient, opening degree and spatial asymmetric distribution of hydraulic fractures on the production performance of fractured horizontal wells in one block of X tight gas reservoir are analyzed. The results show that the simulation method in this paper can accurately predict the production performance of multi-stage fractured horizontal wells in tight gas reservoir, and provide theoretical support and calculation tools for efficient development of tight gas reservoir.

Key words: tight gas, multi-stage fractured horizontal well, gas-water flow, control volume finite element method, numerical simulation

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