川渝碳酸盐岩储层酸蚀裂缝导流能力研究
DOI:
作者:
作者单位:

1.大庆油田有限责任公司采油工程研究院;2.西南石油大学

作者简介:

通讯作者:

中图分类号:

TE344

基金项目:

四川省重点研发项目(2021YFG0112);油气田应用化学四川省重点实验室开放基金(YQKF202217)


Study on the conductivity of acid erosion fractures in carbonate reservoirs in Sichuan and Chongqing
Author:
Affiliation:

Daqing Oilfield Co., Ltd. Oil Production Engineering Research Institute

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    为明确不同酸液体系的储层适用性,了解储层酸岩刻蚀形态对裂缝导流能力的影响,给出不同层位的最佳段塞组合方式。通过在川渝碳酸盐岩储层开展酸蚀裂缝导流能力实验,结果显示,不同酸液体系之间段塞组合对茅口组白云岩酸蚀后的导流能力比灰岩高;不同单一酸液体系酸蚀裂缝后形态不同,其中转向酸刻蚀后有极深的沟槽,自生酸沟槽最浅;对于茅口组,胶凝酸与压裂液和胶凝酸与自生酸的交替级数为三级交替时,其导流能力最高,且胶凝酸与自生酸三级交替后60 MPa下导流能力可达4.53 μm2·cm;栖霞组和灯影组选择压裂液与胶凝酸的二级交替时其导流能力最高,60 MPa下导流能力分别为6.72 μm2·cm和7.47 μm2·cm。在川渝探区,通过对酸液的酸蚀裂缝导流能力进行了现场应用和深入的考察验证,结果表明酸液入井后酸蚀效果良好,改造后试气效果获208×104 m3/d,增产效果达到预期,为川渝碳酸盐岩储层的酸压工艺提供了理论和试验指导。

    Abstract:

    In order to clarify the reservoir applicability of different acid systems, understand the influence of reservoir acid rock etching morphology on fracture conductivity, and give the optimal slug combination method for different horizons. Acid erosion fracture conductivity experiments were carried out in the carbonate reservoirs of Sichuan and Chongqing, the results show that the conductivity of slug combinations between different acid systems to the dolomite of the Maokou Formation after acid etching is higher than that of the limestone; the morphology of acid-etched fractures after acid-etching is different between different single-acid systems, in which steering acid has extremely deep grooves after etching, and the grooves of authigenic acid are the shallowest; for the Maokou Formation, the alternating grades of collodionic acid with fracking fluid and collodionic acid with authigenic acid are For the Qixia Formation and the Lampshade Formation, the highest inflow capacity is achieved when the alternation level between fracturing fluid and gel acid and gel acid and self-generated acid is three levels, and the inflow capacity of gel acid and self-generated acid can be up to 4.53 μm2·cm at 60 MPa after three levels of alternation; the highest inflow capacity of Qixia Formation and Lampshade Formation is achieved when the second level of alternation between fracturing fluid and gel acid is selected, and the inflow capacity is 6.72 μm2·cm and 7.47 μm2·cm at 60 MPa respectively.In the Sichuan Chongqing exploration area, on-site application and in-depth investigation were conducted to verify the acid corrosion fracture conductivity of the acid solution. The results showed that the acid corrosion effect was good after the acid solution entered the well, and the gas testing effect after the transformation was 208 × 104 m3/d, achieving the expected increase in production. It provides theoretical and experimental guidance for acid fracturing technology of carbonate reservoirs in Sichuan and Chongqing.

    参考文献
    相似文献
    引证文献
引用本文

盖祥福,王庆国,管公帅,等. 川渝碳酸盐岩储层酸蚀裂缝导流能力研究[J]. 科学技术与工程, , ():

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2024-02-29
  • 最后修改日期:2024-05-08
  • 录用日期:2024-05-21
  • 在线发布日期:
  • 出版日期:
×
亟待确认版面费归属稿件,敬请作者关注