西南石油大学学报(自然科学版) ›› 2023, Vol. 45 ›› Issue (4): 103-110.DOI: 10.11885/j.issn.1674-5086.2021.06.15.01

• 石油与天然气工程 • 上一篇    下一篇

新场JS2致密砂岩气藏开发中后期加密界限研究

刘言1, 刘露2   

  1. 1. 中国石化西南油气分公司, 四川 成都 610041;
    2. 中国石化西南油气分公司勘探开发研究院, 四川 成都 610041
  • 收稿日期:2021-06-15 出版日期:2023-08-10 发布日期:2023-07-18
  • 通讯作者: 刘露,E-mail:110415lu@163.com
  • 作者简介:刘言,1965年生,男,汉族,四川南部人,教授级高级工程师,主要从事油气开发及管理工作。E-mail:liuyan1.xnyq@sinopec.com;刘露,1986年生,女,汉族,四川武胜人,副研究员,博士,主要从事气藏开发方面的研究。E-mail:110415lu@163.com

A Study on the Threshold of Infiltration Adjustment of Tight Sandstone Gas Reservoir in the Middle and Late Stages of Development

LIU Yan1, LIU Lu2   

  1. 1. Southwest Oil & Gas Company, SINOPEC, Chengdu, Sichuan 610041, China;
    2. Exploration & Production Research Institute, Southwest Oil & Gas Company, SINOPEC, Chengdu, Sichuan 610041, China
  • Received:2021-06-15 Online:2023-08-10 Published:2023-07-18

摘要: 加密调整作为开发中后期气藏提高采收率的主要手段之一,但目前加密调整界限模糊,调整效果不尽理想。以典型致密砂岩气藏新场JS2气藏为例,以经济评价为依据,利用动态分析及数值模拟技术,研究不同储量区加密调整经济技术界限,提出针对性的技术对策。研究结果表明: 1) I类储量区加密调整界限:地层压力大于原始地层压力的59%,直井和水平井均可;当储量丰度大于4.96×108 m3/km2,水平井更优;地层压力仅为原始地层压力的47%~59%只适用于直井。2) II类储量区:地层压力大于原始地层压力的67%且储量丰度大于2.03×108 m3/km2直井及水平井均可,储量丰度小于2.20×108 m3/km2适用于直井,储量丰度大于2.34×108 m3/km2水平井更优;地层压力为原始地层压力的51%~67%,只适用于直井。3) III类储量区:仅水平井适宜加密调整,且地层压力大于原始地层压力的88%,储量丰度大于1.30×108 m3/km2。4)通过加密调整,预测增加可采储量4.02×108 m3,提高采收率0.67%。

关键词: 致密砂岩气藏, 加密调整, 数值模拟, 地层压力, 储量丰度

Abstract: Infiltration adjustment is one of the main methods to improve recovery in the middle and late stages of gas reservoir development, but the adjustment effect is not ideal at present due to the inadequate understanding of threshold of adjustment implementation. Taking the typical tight sandstone gas reservoir of Xinchang JS2 as an example, we study the economic and technical threshold for infiltration adjustment of different reserve areas through economic evaluation, dynamic analysis and numerical simulation, and put forward specific technical suggestions. In type I reserve area adjustments should be made to both vertical and horizontal wells when the formation pressure is greater than 59% of the original formation pressure; when the reserve abundance is greater than 4.96×108 m3/km2, adjustments should be made to horizontal wells; when the formation pressure is at 47%~59%, adjustments should be made to vertical wells only. In type II reserve area, when the formation pressure is greater than 67% and reserve abundance is greater than 2.03×108 m3/km2, adjustments can be made to both vertical and horizontal wells; when reserve abundance is less than 2.20×108 m3/km2, adjustments should be made to vertical wells, and when reserve abundance is greater than 2.34×108 m3/km2, adjustments should be made to horizontal wells; when the formation pressure is at 51%~67%, adjustments should be made to vertical wells only. In type III reserves area, adjustments can be made only to horizontal wells when the formation pressure is greater than 88%of the original formation pressure and reserve abundance is greater than 1.30×108 m3/km2. Ti is estimated that recoverable reserves can increase by 4.02×108 m3 and recovery by 0.67% through infiltration adjustment.

Key words: tight sandstone gas reservoir, infiltration adjustment, numerical simulation, formation pressure, reserve abundance

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