岩性油气藏 ›› 2026, Vol. 38 ›› Issue (2): 76–85.doi: 10.12108/yxyqc.20260207

• 地质勘探 • 上一篇    下一篇

库车坳陷迪北气藏侏罗系阿合组致密储层流体活动属性约束反演方法

彭芬1(), 任登峰1, 彭建新1, 魏红兴2   

  1. 1 中国石油塔里木油田公司 油气工程研究院， 新疆 库尔勒 841000
    2 中国石油塔里木油田公司勘探开发研究院， 新疆 库尔勒 841000
  • 收稿日期:2024-12-10 修回日期:2025-03-24 出版日期:2026-03-01 发布日期:2026-02-05
  • 第一作者:彭芬（1988—），女，硕士，高级工程师，主要从事储层改造方面的研究工作。地址：（841000）新疆维吾尔自治区库尔勒市塔里木研发中心。Email:tgbz25dd@163.com。
  • 基金资助:
    中国石油天然气股份有限公司塔里木油田分公司科技项目“库车北部致密砂岩储层高精度裂缝甜点预测与改造工艺优化”(671023115014)

Fluid activity attribute-constrained inversion method for tight reservoirs of Jurassic Ahe Formation in Dibei gas reservoir, Kuqa Depression

PENG Fen1(), REN Dengfeng1, PENG Jianxin1, WEI Hongxing2   

  1. 1 Oil and Gas Engineering Research Institute, PetroChina Tarim Oilfield Company, Korla 841000, Xinjiang, China
    2 Research Institute of Exploration and Development, PetroChina Tarim Oilfield Company, Korla 841000, Xinjiang, China
  • Received:2024-12-10 Revised:2025-03-24 Online:2026-03-01 Published:2026-02-05

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摘要：

致密砂岩气藏普遍存在物性差、非均质性强等问题，常规地震反演方法在该类储层流体识别中效果较差。基于匹配追踪与集合经验模态分解，流体活动属性提取及贝叶斯理论，提出了一种流体活动属性约束的正则化反演方法，进行了模型数据测试，并在库车坳陷迪北气藏侏罗系阿合组的致密砂岩储层预测中进行了实际应用。研究结果表明：①流体活动属性约束反演的主要思路是利用MP-EEMD技术进行时频分析进而提取流体活动属性；采用贝叶斯理论构建反演目标函数并将归一化的流体活动属性作为软约束加入目标函数。②模型数据测试表明，MP-EEMD时频谱相较于MP时频谱，克服了多频干扰，在时间和频率方向分辨率更高；加入流体约束的反演结果对于含流体地层的预测效果也优于传统反演方法。③流体活动属性约束反演在库车坳陷迪北气藏侏罗系阿合组储层的应用结果显示，纵波速度反演结果与测井解释的吻合度较高，对薄层的刻画更加准确，相较于传统方法取得了更高的纵向分辨率。

关键词: 致密砂岩, 储层预测, 流体活动属性, 叠后反演, 匹配追踪, 流体检测, 阿合组, 侏罗系, 迪北气藏, 库车坳陷

Abstract:

Tight sandstone gas reservoirs generally suffer from poor physical properties and strong heterogenei-ty, and conventional seismic inversion methods have poor performance in fluid identification in such reservoirs. Based on matching pursuit, ensemble empirical mode decomposition, fluid activity attribute extraction, and Bayesian theory, a regularized inversion method constrained by fluid activity attributes was proposed. The method was validated through model data testing and applied to predict tight sandstone reservoirs in Jurassic Ahe Formation of Dibei gas reservoir in Kuqa Depression. The results show that: （1） The main idea of fluid activity attribute-constrained inversion is to perform time-frequency analysis using MP-EEMD technique to extract fluid activity attributes, and to construct the inversion objective function under Bayesian theory, in which the norma-lized fluid activity attributes are incorporated as soft constraints. (2) Model data tests show that MP-EEMD time-frequency spectrum overcomes multi-frequency interference, achieving higher resolution in both time and frequency domains. Furthermore, the inversion results with fluid constraints demonstrate superior predictive performance for fluid-bearing formations compared with conventional inversion. (3) The application of fluid activity attributes-constrained inversion in Jurassic Ahe Formation reservoirs in Dibei gas field of Kuqa Depression shows that： inverted P-wave velocity results exhibit higher consistency with well-logging interpretations, and with improved thin-bed characterization, achieving higher vertical resolution compared with conventional methods.

Key words: tight sandstone, reservoir prediciton, fluid activity attribute, post-stack inversion, matching pursuit, fluid detection, Ahe Formation, Jurassic, Dibei gas reservoir, Kuqa Depression

中图分类号: 

  • TE3111

图1

库车坳陷迪北气藏构造单元划分（a）、油藏剖面（b）和侏罗系岩性地层综合柱状图（c）（据文献[23]修改）"

图2

含有多频干扰的合成信号"

表1

子波参数表"

子波 表达式 参数
W1 $ D \cdot \sin (2 \pi \cdot v t)$ D = 1,v = 10 Hz
W2 $ \begin{array}{c}D \cdot \exp \left[-4 \ln 2 v^{2} \sigma^{-2}(t-\tau)^{2}+\right. \\i 2 \pi v(t-\tau)]\end{array}$ D = 5,σ = 1,
v = 20 Hz,τ = 0.1 s
W3 D = 5,σ = 1,
v = 40 Hz,τ = 0.2 s
W4 D = 5,σ = 1,
v = 60 Hz,τ = 0.3 s

图3

合成信号的重建及方法对比"

图4

库车坳陷含气井A1井侏罗系阿合组不同岩性井旁叠后振幅谱（a）及其对应的振幅梯度（b）"

图5

库车坳陷含气井A1井侏罗系阿合组井旁地震道（a）及地震流体活动属性（b）"

图6

库车坳陷含水井A2井侏罗系阿合组井旁地震道（a）及地震流体活动属性（b）"

图7

库车坳陷A1—A2井侏罗系阿合组流体活动属性剖面"

图8

一维模型稀疏脉冲反演与基于一维合成数据的流体活动属性约束反演结果对比"

图9

库车坳陷迪北气藏A井—B井侏罗系阿合组地震剖面"

图10

库车坳陷迪北气藏侏罗系阿合组地震频谱特征"

图11

库车坳陷迪北气藏C井侏罗系阿合组叠后流体检测剖面"

图12

库车坳陷迪北气藏A井—B井侏罗系阿合组常规反演与流体约束反演结果对比"

图13

库车坳陷迪北气藏A—B井区侏罗系阿合组H0小层有效储层厚度"

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