非均布导流下页岩气藏压裂水平井产量模拟

doi:10.11885/j.issn.16745086.2020.03.09.01

西南石油大学学报(自然科学版) ›› 2021, Vol. 43 ›› Issue (3): 93-100.DOI: 10.11885/j.issn.16745086.2020.03.09.01

非均布导流下页岩气藏压裂水平井产量模拟

杨兆中¹, 廖梓佳¹, 李小刚¹, 朱利勇^1,2, 陈浩¹

1. 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;
2. 中国民用航空飞行学院空中乘务学院, 四川德阳 618307

收稿日期:2020-03-09 发布日期:2021-06-22
通讯作者: 廖梓佳,E-mail:lzjfracl@foxmail.com
作者简介:杨兆中,1969年生,男,汉族,四川泸州人,教授,博士生导师,主要从事低渗透油气藏增产改造与油气藏数值模拟方面的教学和研究工作。E-mail:yzzycl@vip.sina.com
廖梓佳,1995年生,男,汉族,四川阆中人,博士研究生,主要从事油气增产领域的研究工作。E-mail:lzjfrac@foxmail.com
李小刚,1981年生,男,汉族,四川仁寿人,教授,博士生导师,主要从事油气增产领域的研究与教学工作。E-mail:swpuadam@126.com
朱利勇,1992年生,男,汉族,四川自贡人,硕士研究生,主要从事低渗透油气藏酸化压裂数值模拟方面的研究工作。E-mail:zly_me@163.com
陈浩,1997年出生,男,汉族,四川成都人,硕士研究生,主要从事油气田开发方面的研究。E-mail:1205169486@qq.com
基金资助:
四川省科技计划重点研发项目（2018JZ0079，2019YFG0529）

Production Simulation of Fractured Horizontal Well with Non-uniform Space Distribution of Fracture Conductivity in Shale Gas Reservoir

YANG Zhaozhong¹, LIAO Zijia¹, LI Xiaogang¹, ZHU Liyong^1,2, CHEN Hao¹

1. State Key Laboratory of Oil&Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. Air Crew Institute, Civil Aviation Flight University of China, Deyang, Sichuan 618307, China

Received:2020-03-09 Published:2021-06-22

摘要/Abstract

摘要： 现有的页岩气压裂井产能预测模型假设导流能力在缝长方向均匀分布，导致预测结果存在较大偏差。为提高压裂气井的产量预测精度，基于源汇思想和势的叠加原理，考虑压裂裂缝缝内导流能力的非均匀分布特征，建立了气井水力压裂后的非稳态产量预测模型，并通过数值方法对压裂水平井的产量进行了模拟。研究表明，与常规导流均匀分布的模型相比，缝内导流的非均匀分布对产量产生较大影响；在无因次导流能力较小时，强化近井地带裂缝导流能力的凹型分布等布局方式，有利于提高压后产量；随着无因次导流能力的增加，产量增幅逐渐降低；由于气层的供给能力有限，在无因次导流能力较高时，导流能力出现“过剩”，不同的导流能力分布方式下的产量接近。

关键词: 压裂水平井, 导流能力分布, 产量模拟, 点汇, 叠加原理, 裂缝离散

Abstract: The universal assumption in existing production prediction models of fractured horozontal well for shale gas reservoir is the evenly distribution of fracture conductivity. Therefore, there is a large deviation between the prediction production and real production. In order to improve the accuracy of production prediction for fractured gas well, a new model has been established based on point sink and superposition principle with consideration of the characteristic of non-uniform distribution of fracture conductivity. Numerical simulation studies show that the non-uniform distribution of fracture conductivity has a greater impact on production compared with the conventional model. Intensifying the fracture conductivity at nearside of wellbore with concave distribution could improve the yield after hydraulic fracturing when the dimensionless conductivity is small. With the increase of dimensionless conductivity, the increasing amplitude of yield decreases. Due to the limitation of supplying capacity of gas reservoir, the yield of gas well is similar under different patterns of conductivity distribution when the fracture conductivity reaches a certain level.

Key words: fractured horizontal well, distribution of fracture conductivity, production simulation, point sink, superposition principle, fracture discrete

中图分类号:

TE357

杨兆中, 廖梓佳, 李小刚, 朱利勇, 陈浩. 非均布导流下页岩气藏压裂水平井产量模拟[J]. 西南石油大学学报(自然科学版), 2021, 43(3): 93-100.

YANG Zhaozhong, LIAO Zijia, LI Xiaogang, ZHU Liyong, CHEN Hao. Production Simulation of Fractured Horizontal Well with Non-uniform Space Distribution of Fracture Conductivity in Shale Gas Reservoir[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2021, 43(3): 93-100.

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非均布导流下页岩气藏压裂水平井产量模拟

Production Simulation of Fractured Horizontal Well with Non-uniform Space Distribution of Fracture Conductivity in Shale Gas Reservoir

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