岩性油气藏 ›› 2023, Vol. 35 ›› Issue (5): 153–160.doi: 10.12108/yxyqc.20230515

• 石油工程与油气田开发 • 上一篇    下一篇

一种水侵气藏动态储量和水侵量计算新方法

岳世俊1, 刘应如1, 项燚伟2, 王玉林1, 陈汾君2, 郑长龙1, 景紫岩1, 张婷静1   

  1. 1. 中国石油勘探开发研究院 西北分院, 兰州 730020;
    2. 中国石油青海油田公司勘探开发研究院, 甘肃 敦煌 736200
  • 收稿日期:2023-02-20 修回日期:2023-03-27 出版日期:2023-09-01 发布日期:2023-09-28
  • 第一作者:岳世俊（1981—），男，硕士，高级工程师，主要从事油气藏工程方面的研究工作。地址：（730020）甘肃省兰州市城关区雁儿湾路535号。Email：yueshijun@petrochina.com.cn。
  • 基金资助:
    中国石油天然气股份有限公司科技管理部复杂天然气田开发关键技术 “水侵气藏提高采收率及低丰度复杂气藏开发技术研究”（编号： 2021DJ1705） 资助。

A new method for calculating dynamic reserves and water influx of water-invaded gas reservoirs

YUE Shijun1, LIU Yingru1, XIANG Yiwei2, WANG Yulin1, CHEN Fenjun2, ZHENG Changlong1, JING Ziyan1, ZHANG Tingjing1   

  1. 1. PetroChina Research Institute of Petroleum Exploration and Development-Northwest, Lanzhou 730020, China;
    2. Research Institute of Exploration and Development, PetroChina Qinghai Oilfield Company, Dunhuang 736200, Gansu, China
  • Received:2023-02-20 Revised:2023-03-27 Online:2023-09-01 Published:2023-09-28

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摘要： 以均质径向地层边水气藏为例，基于水驱气藏的物质平衡理论，推导了地层平均含水饱和度与出口端含水饱和度的关系；引入存水体积系数，建立了平均含水饱和度与气藏动态储量和水侵量的联系，计算气藏动态储量和水侵量；将该方法运用于柴达木盆地台南气田第四系涩北组第6小层，以视地质储量法验证了动态地质储量，以数值模拟法验证了水侵量的计算结果。研究结果表明： ①均质径向地层边水气藏中，地层平均含水饱和度与出口端含水饱和度呈线性正相关； ②通过平均饱和度计算气藏动态储量时，应选取开发中后期趋于稳定的数据，此时地层压降波及到储层边界，能反映全工区真实的动态储量，而早期数据计算的结果偏小； ③通过平均饱和度计算的柴达木盆地台南气田第四系涩北组第6小层的动态地质储量为80.1×108 m3，与视地质储量法计算的动态地质储量误差为1%，通过平均饱和度计算的水侵量与数值模拟法计算的水侵量误差约为10%。

关键词: 水侵气藏, 动态储量, 物质平衡, 分流理论, 地层平均含水饱和度, 水侵量, 径向地层, 台南气田, 柴达木盆地

Abstract: Taking a homogeneous radial gas reservoir with edge water as an example，based on the material balance theory of water drive gas reservoirs，the relationship between the average water saturation of the formation and the exit-end water saturation was derived. Water storage volume coefficient was introduced to establish the relationhsips of average water saturation with dynamic reserves and water influx of gas reservoirs，so as to calculate the dynamic reserves and water influx of gas reservoirs. This method was applied to the sixth layer of Quaternary Sebei Formation in Tainan gas field of Qaidam Basin，the dynamic geological reserves were verified using the apparent geological reserves method，and the calculation results of water influx were verified using numerical simulation method. The results show that：（1）In homogeneous radial gas reservoir with edge water，the average water saturation of the formation is linearly positively correlated with the exit-end water saturation.（2）When calculating the dynamic reserves of gas reservoirs through average saturation，the data that tends to stabilize in the middle and later stages of development should be selected. At this time，the pressure drop of the formation affects the reservoir boundary，which can reflect the real dynamic reserves of the entire work area. However，the results calculated by early data are relatively small.（3）The dynamic geological reserves of the sixth layer of Quaternary Sebei Formation in Tainan gas field of Qaidam Basin calculated by average saturation are 8.1×108 m3，with an error of 1% compared with the dynamic geological reserves calculated by apparent geological reserves method. The error between the water influx calculated by average saturation and the water influx calculated by numerical simulation method is about 10%.

Key words: water-invaded gas reservoirs, dynamic reserves, material balance, fractional flow theory, average water saturation, water influx, radial formation, Tainan gas field, Qaidam Basin

中图分类号: 

  • TE341
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