石油勘探与开发 >

2019 , Vol. 46 >Issue 3: 602 - 612

DOI: https://doi.org/10.11698/PED.2019.03.19

新能源新领域

大型致密砂岩气田有效开发与提高采收率技术对策——以鄂尔多斯盆地苏里格气田为例

  • 冀光 ,
  • 贾爱林 ,
  • 孟德伟 ,
  • 郭智 ,
  • 王国亭 ,
  • 程立华 ,
  • 赵昕
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  • 中国石油勘探开发研究院,北京 100083
冀光（1971-）,男,内蒙古人,硕士,中国石油勘探开发研究院高级工程师,主要从事油气田开发研究工作。地址：北京市海淀区学院路20号,中国石油勘探开发研究院气田开发研究所,邮政编码：100083。E-mail: jiguang@petrochina.com.cn

收稿日期: 2018-10-15

  修回日期: 2019-04-18

  网络出版日期: 2019-05-25

基金资助

“十三五”国家科技重大专项“致密气富集规律与勘探开发关键技术”（2016ZX05047）; 中国石油科学研究与技术开发基金项目“天然气藏开发关键技术”（2016B-15）; 中国石油科技重大专项“长庆油田5000万吨持续高效稳产关键技术研究与应用”（2016E-0504）

收起

Technical strategies for effective development and gas recovery enhancement of a large tight gas field: A case study of Sulige gas field, Ordos Basin, NW China

  • JI Guang ,
  • JIA Ailin ,
  • MENG Dewei ,
  • GUO Zhi ,
  • WANG Guoting ,
  • CHENG Lihua ,
  • ZHAO Xin
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  • Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China

Received date: 2018-10-15

  Revised date: 2019-04-18

  Online published: 2019-05-25

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摘要

以致密气采收率影响因素及储集层地质特征分析为基础,从剩余气成因角度对苏里格气田已开发区致密气剩余储量进行分类,估算不同类型剩余气储量,并提出相应提高采收率技术对策。苏里格气田致密气剩余储量可划分为4类：井网未控制型、水平井漏失型、射孔不完善型和复合砂体内阻流带型,其中,井网未控制型和复合砂体内阻流带型井间未动用剩余气是气田挖潜提高采收率的主体,井网加密调整是主要手段。综合考虑储集层地质特征、生产动态响应和经济效益要求,建立定量地质模型法、动态泄气范围法、产量干扰率法、经济技术指标评价法4种直井井网加密技术,以及直井与水平井联合井网优化设计方法,论证气田富集区在现有经济技术条件下,合理井网密度为4口/km2,可将采收率由当前的32%提高到50%左右。同时针对层间未动用型剩余储量形成老井挖潜、新井工艺技术优化、合理生产制度优化、排水采气、降低废弃产量5种提高采收率配套技术,可在井网加密的基础上再提高采收率5%左右。研究成果为苏里格气田230×108 m3/a规模长期稳产及长庆气区上产提供了有效的支撑。图6表4参31

关键词： 鄂尔多斯盆地; 苏里格气田; 致密气; 剩余储量; 井网加密; 提高采收率; 配套技术

本文引用格式

冀光 , 贾爱林 , 孟德伟 , 郭智 , 王国亭 , 程立华 , 赵昕 . 大型致密砂岩气田有效开发与提高采收率技术对策——以鄂尔多斯盆地苏里格气田为例[J]. 石油勘探与开发, 2019 , 46(3) : 602 -612 . DOI: 10.11698/PED.2019.03.19

Abstract

Based on the analysis of influencing factors of tight gas recovery and reservoir geological characteristics, the types of remaining tight gas reserves in the Sulige gas field are summarized from the perspective of residual gas genesis to estimate residual gas reserves of different types and provide corresponding technical strategies for enhancing gas recovery. The residual gas reserves in the Sulige gas field can be divided into four types: well pattern uncontrollable, horizontal well missing, imperfect perforation, blocking zone in composite sandbodies. Among them, the uncontrolled remaining gas of well pattern and blocking zone in composite sandbodies are the main body for tapping potential and improving recovery factor, and well pattern infilling adjustment is the main means. Taking into account reservoir geological characteristics, production dynamic response and economic benefit requirements, four methods for infilling vertical well pattern, i.e., quantitative geological model method, dynamic controlled range of gas well method, production interference method and economic and technical index evaluation method, as well as a design method of combined vertical well pattern with horizontal well pattern are established. Under certain economic and technological conditions, the reasonable well pattern density of enrichment zone of gas field is proved to be 4 wells per square kilometers, which can increase the recovery rate of the gas field from 32% to about 50%. Meanwhile, five matching techniques for enhancing gas recovery aimed at interlayer undeveloped residual gas have been formed, including tapping potential of old wells, technological technology optimizing of new wells, rational production system optimizing, drainage and gas producing, and reducing waste production, which could increase the recovery rate for 5% based on well pattern infilling. The research results provide effective support for the long-term stable production of 230×108 m3/a of the Sulige gas field and production growth in the Changqing gas area.

Key words： Ordos Basin; Sulige gas field; tight gas; remaining reserves; well pattern infilling; enhancing gas recovery; matching technologies

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