|本期目录/Table of Contents|

[1]郭 平,董 超,刘 旭,等.考虑压裂影响的低渗气藏高压平面供气机理探讨*[J].中国海上油气,2019,31(03):92-98.[doi:10.11935/j.issn.1673-1506.2019.03.011]
 GUO Ping,DONG Chao,LIU Xu,et al.Discussion on the mechanism of high pressure plane gas supply in low permeability fractured gas reservoir[J].China Offshore Oil and Gas,2019,31(03):92-98.[doi:10.11935/j.issn.1673-1506.2019.03.011]
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考虑压裂影响的低渗气藏高压平面供气机理探讨*()

《中国海上油气》[ISSN:1673-1506/CN:11-5339/TE]

卷:
第31卷
期数:
2019年03期
页码:
92-98
栏目:
东海盆地油气勘探开发成果专辑
出版日期:
2019-06-25

文章信息/Info

Title:
Discussion on the mechanism of high pressure plane gas supply in low permeability fractured gas reservoir
文章编号:
1673-1506(2019)03-0092-07
作者:
郭 平董 超刘 旭汪誉高汪周华胡义升
西南石油大学油气藏地质及开发工程国家重点实验室 四川成都 610500
Author(s):
GUO PingDONG ChaoLIU XuWANG YugaoWANG ZhouhuaHU Yisheng
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China
关键词:
低渗气藏 平面非均质性 供气机理 压裂 渗透率级差
Keywords:
low permeability gas reservoir plane heterogeneity gas supply mechanism fracture permeability difference
分类号:
TE37
DOI:
10.11935/j.issn.1673-1506.2019.03.011
文献标志码:
A
摘要:
采用高低渗区“串联”方法开展了考虑压裂影响的高压(最高为45 MPa)平面非均质供气机理渗流实验,研究了配产、物性、压裂改造等对供气能力的影响,通过建立单井平面非均质渗流数值模型对实验结果进行了论证。结果表明,配产越高,稳产期越短,总采收率越低; 生产初期高渗区贡献率从60%左右逐渐降低,高低渗区最终贡献率受各区储量控制; 渗透率级差越小,基质渗透率越高,相同配产下采收率越高,低渗区动用程度越高; 压裂后近井高渗区压差变小,更有利于提高低渗区压差,高低渗分区采收率和总采收率均提高,储层平均渗透率越低,压裂后采收率提高幅度越大; 当渗透率级差大于50倍时,近井高渗“甜点”并不能有效激活远井低渗储层,储层总体采出程度低。本文研究成果对高效开发低渗非均质气藏有重要的生产指导意义。
Abstract:
The “series” method in the high-low permeability zone was used to conduct seepage experiment of heterogeneous gas supply mechanism at high pressure plane(up to 45 MPa)while considering the effect of fracturing. It studied effects of gas distribution, physical properties and fracturing transformation on gas supply capacity. The experimental results were demonstrated by establishing a single well plane heterogeneous percolation numerical model. The results showed that the higher yield may cause shorter stable yield period and lower total recovery efficiency. In the initial stage of production, the contribution rate of high permeability zone decreased gradually from about 60%, and the final contribution rate of high and low permeability zone was controlled by the reserves of each zone. The smaller permeability difference may indicate the higher matrix permeability, and the higher recovery efficiency may be obtained under the same production, and producing degree may be higher in the low permeability zone. After fracturing, the pressure difference decreases in the high-permeability zone near the borehole, which is more conducive to increasing the pressure difference in the low-permeability zone. The recovery efficiency and the total recovery efficiency in both high and low permeability zones are improved. The lower average permeability of the reservoir may cause greater recovery enhancement after fracturing. When the permeability difference is more than 50 times, the near-borehole high-permeability “sweet spot” cannot effectively activate the far-well low- permeability reservoir, and the overall recovery of the reservoir is low. The research results of this paper have important production guiding significance for the efficient development of low permeability heterogeneous gas reservoirs.

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备注/Memo

备注/Memo:
* “十三五”国家科技重大专项“东海厚层非均质性大型气田有效开发关键技术(编号:2016ZX05027-004-005)”部分研究成果。
第一作者简介: 郭平,男,教授,博士生导师,主要研究方向为油气藏流体相态、气田及凝析气田开发、油气藏工程、注气提高采收率等。地址:四川省成都市新都区新都大道8号(邮编:610500)。E-mail:guopingswpi@vip.sina.com。
更新日期/Last Update: 2019-05-20