油气藏评价与开发 ›› 2018, Vol. 8 ›› Issue (3): 46-50.

• 石油工程 • 上一篇    下一篇

多级交替注入酸压工艺优化研究——以磨溪龙女寺构造龙王庙组储层改造为例

叶颉枭1,2,李力1,2,韩慧芬1,2,张思琦3,薛衡4,5,张志成6,何婷婷1,2   

  1. 1. 中国石油西南油气田分公司工程技术研究院,四川 成都 610017
    2. 国家能源高含硫气藏开采研发中心,四川 成都 610017
    3. 中国石油西南油气田分公司天然气研究院,四川 成都 610213
    4. 中国振华石油控股有限公司,北京 100031
    5. 成都北方石油勘探开发技术有限公司,四川 成都 610500
    6. 中国石油西南油气田分公司勘探事业部,四川 成都 610041
  • 收稿日期:2017-06-26 出版日期:2018-06-26 发布日期:2018-12-07
  • 作者简介:颉枭(1986—),男,工程师,从事油气田增产改造技术研究及现场试验工作。
  • 基金资助:
    国家科技重大专项“大型深层碳酸盐岩气藏钻采技术研究与应用”(2016ZX05052003);中国石油天然气股份有限公司重大科技专项“西南油气田天然气上产300亿立方米关键技术研究与应用”(2016E-0609)

Optimization research of multistage alternating acid fracturing: A case study of reservoir reconstruction for Longwangmiao Formation in Moxi-Longnvsi area

Ye Jiexiao1,2,Li Li1,2,Han Huifen1,2,Zhang Siqi3,Xue Heng4,5,Zhang Zhicheng6,He Tingting1,2   

  1. 1. Engineering Technology Research Institute of Southwest Oil & Gas Field Company, PetroChina, Chengdu, Sichuan 610017, China;
    2. National Energy R&D Center of High Sulfur Gas Exploitation, Chengdu, Sichuan 610017, China;
    3. Natural Gas Research Institute of Southwest Oil & Gas Field Company, PetroChina, Chengdu, Sichuan 610213, China;
    4. China Zhenhua Oil Co., Ltd., Beijing 100031, China
    5. Chengdu North Petroleum Exploration and Development Technology Co., Ltd., Chengdu, Sichuan 610500, China
    6. Exploration Division of Southwest Oil & Gas Field Company, PetroChina, Chengdu, Sichuan 610041, China;
  • Received:2017-06-26 Online:2018-06-26 Published:2018-12-07

摘要:

为了提高磨溪—龙女寺构造龙王庙组储层多级交替注入酸压工艺设计的准确性,通过酸蚀裂缝导流能力实验,结合数值扫描技术,开展了不同注入级数、不同液体组合和不同排量下酸蚀裂缝导流能力保持率和裂缝壁面影响规律研究。结果表明,相比于一级和二级注入,三级交替注入可获得最高的酸蚀裂缝导流能力保持率,且能形成贯穿岩板的酸蚀沟槽;注入级数从一级增加到二级再增加到三级,导流能力保持率提高量逐渐变小;相同闭合压力和主体酸液条件下,以冻胶作为前置液的三级注入获得的导流能力保持率与自生酸为前置液的导流能力保持率差别不大;提高注入速率有利于提高酸蚀裂缝导流能力保持率。优化后的多级交替注入酸压工艺应用于磨溪龙女寺构造龙王庙组储层改造,单井施工曲线和后期拟合表明,该工艺可以实现沟通井周有利储集体的工程目标,为低渗储层改造提供了有效的技术手段。

关键词: 多级交替注入, 酸压, 酸蚀导流能力, 岩板扫描, 工艺优化

Abstract:

In order to improve the accuracy of the acid fracturing by the multistage alternative injection in Longwangmiao Formation of Moxi-Longnvsi area, we studied the conservation rate of the conductivity of the acid corrosion fractures and the fracture surface morphology influence of different injection rounds, fluid groups and injection rate by the experiment and the numerical scanning. The results showed that the 3rd injection round obtained higher conservation rate of the conductivity of the acid etched fractures, and formed the acid corrosion groove through rock plate. With the increasing of the injection round, the increment of the conservation rate of the conductivity decreased gradually. With the same closing pressure and main acid, little different existed in the 3rd injection round when it took the gel and the authigenic acid as the preflush. With the increasing of the injection rate, the conservation rate of the conductivity of the acid etched fracture was more ideal. The optimized technology has been used in Longwangmiao Formation of Moxi-Longnvsi area. The acid-fracturing curves and fitting data indicate that the technology can realize the engineering purpose. It also provides an effective technical mean for the transformation of the low permeability reservoir.

Key words: multistage alternating injection, acid fracturing, conductivity of the acid corrosion fracture, rock beam scanning, technology optimizatio

中图分类号: 

  • TE357