油气藏评价与开发 ›› 2018, Vol. 8 ›› Issue (6): 45-50.

• 石油工程 • 上一篇    下一篇

致密砂岩支撑裂缝气测导流能力研究

何思源1,赵立强1,罗志锋1,李骏1,李化2   

  1. 1. 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
    2. 中国石油西南油气田分公司川西北气矿,四川 邛崃 611530
  • 收稿日期:2018-02-05 出版日期:2018-12-26 发布日期:2018-12-13
  • 作者简介:何思源(1994—),男,在读硕士研究生,油气田开发。
  • 基金资助:
    中国石化石油工程技术研究院“可视化复杂缝网支撑剂运移规律研究”(10010099-16-ZC0607-0021)

Study on indoor gas measurement of supporting fracture conductivity of tight sandstone

He Siyuan1,Zhao Liqiang1,Luo Zhifeng1,Li Jun1,Li Hua2   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China
    2. Northwest Sichuan Gas Mine, PetroChina Southwest Oil and Gasfield Company, Qionglai, Sichuan 611530, Sichuan
  • Received:2018-02-05 Online:2018-12-26 Published:2018-12-13

摘要:

用气测导流能力结果指导致密气藏的压裂设计优化,压后效果预测,支撑剂优选评价等更具有针对性和合理性。目前常见的气测导流能力测试主要研究了闭合压力、支撑剂粒径、支撑剂类型对于导流能力的影响。基于分析研究压裂液类型与铺置方式对导流能力影响的实验方案,采用DL—2000支撑裂缝导流能力试验仪,根据SY/T6302—1997《压裂支撑剂填充层短期导流能力评价推荐方法》进行气测导流能力测试。结果显示,随着闭合压力的增加,裂缝导流能力的下降;支撑剂粒径越大导流能力越大,但随着闭合压力的增加,导流能力降幅越大;铺置方式为尾追时裂缝气测导流能力最好;压裂液伤害使裂缝气测导流能力下降了80 %~95 %。

关键词: 支撑裂缝, 气测导流能力, 渗透率, 压裂液伤害, 铺置方式

Abstract:

After the guidance of the results of gas flow conductivity test for the optimization of fracturing design of tight gas reservoirs, the prediction of post fracturing effect and the optimization evaluation of proppant were more pertinent and reasonable. The current common gas flow conductivity tests mainly focused on the influence of the closure pressure, proppant particle size and proppant type on the flow conductivity. Based on the analysis, we designed the experimental scheme about the influence of fracturing fluid type and laying mode on gas flow conductivity by using the DL—2000 fracture support conductivity tester and according to the SY/T6302—1997 "proppant filling layer short-term conductivity evaluation and recommendation method". The results showed that the fracture conductivity decreases when the closure pressure increased; the larger the proppant diameter was, the greater the conductivity would be; while the greater the closure pressure was, the greater the decreasing amplitude of the flow conductivity would be. The laying mode for the rear gas logging fracture conductivity was the best. The fracturing fluid damage made the cracks in the gas logging diversion capacity decreased by 80 %~95 %.

Key words: supporting fractures, gas flow conductivity, permeability, fracturing fluid damage, paving methods

中图分类号: 

  • TE357.2