岩性油气藏 ›› 2026, Vol. 38 ›› Issue (1): 126–135.doi: 10.12108/yxyqc.20260111

• 地质勘探 • 上一篇    

基于高精度地质建模技术的断层侧向封闭性评价方法——以辽河坳陷兴隆台构造带太古界潜山油气藏为例

李滨(), 闵忠顺, 孟令娜, 张源李, 尹剑峰, 周培杰   

  1. 中国石油辽河油田公司 勘探开发研究院， 辽宁 盘锦 124010
  • 收稿日期:2025-05-09 修回日期:2025-08-05 出版日期:2026-01-01 发布日期:2026-01-23
  • 第一作者:李滨（1985—），男，高级工程师，主要从事辽河储气库中库址筛选、建库工作。地址：（124010）辽宁省盘锦市兴隆台区石油大街勘探开发研究院。Email:libin07@petrochina.com.cn。
  • 基金资助:
    国家自然科学基金“辽宁储气库群建设”(XLYC1808021)

A method for assessing fault lateral sealing based on high-resolution geological modeling: A case study of Archean buried hill reservoir in Xinglongtai structural belt of Liaohe Depression

LI Bin(), MIN Zhongshun, MENG Lingna, ZHANG Yuanli, YIN Jianfeng, ZHOU Peijie   

  1. Research Institute of Exploration and Development, PetroChina Liaohe Oilfield Branch, Panjin 124010, Liaoning, China
  • Received:2025-05-09 Revised:2025-08-05 Online:2026-01-01 Published:2026-01-23

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摘要：

Allan图分析对于断层封闭性的研究具有重要意义。以辽河坳陷兴隆台构造带太古界潜山油气藏为例，综合测录井、三维地震和实验分析测试资料，提出了一种基于高精度地质建模技术的改进Allan图法，用于分析断层封闭性。研究结果表明：①基于井-震联合建立的高精地质模型可解决井位数据缺失的问题，在精细剖析变质岩潜山各个区域的岩性发育情况及造缝能力的基础上，高精地质模型可准确刻画断层两侧的地层接触关系和岩性分布规律，经人工检查和调整可形成最终的改进Allan图。②研究区断面上共存在6种岩性对接模式，其中具备良好封闭性的对接模式包含角砾岩-泥岩、混合岩-泥岩、混合岩-片麻岩、混合岩-角砾岩、角砾岩-角砾岩，区外围断层F3、F5全封闭，区内渗漏点海拔为-4 390 m。③结合模糊数学方法、现场流体分布进行了交叉检验，各个区域分析结果与改进Allan图法分析的断层侧向封闭性吻合度高，说明该方法在变质岩潜山表现出优异的适用性和准确性，具有较高的应用价值。

关键词: 改进Allan图法, 断层封闭性, 储气库, 高精度地质建模, 太古界潜山, 兴隆台构造带, 辽河坳陷

Abstract:

Allan diagram analysis is of great significance for the study of fault sealing. Taking Archean buried hill hydrocarbon reservoir in Xinglongtai structural belt of Liaohe Depression as an example, an improved Allan diagram method based on high-resolution geological modeling technology was proposed to analyze fault sealing by integrating well logging, 3D seismic, and experimental analysis and testing data. The results show that: （1） The high-resolution geological model established based on the well-seismic integration can address the issue of missing well-location data. Based on a detailed analysis of lithology development and fracture-forming capability in various regions of the metamorphic buried hill, the high-resolution geological model can accurately depict the stratigraphic contact relationship and lithology distribution pattern on both sides of the fault. After manual inspection and adjustment, the final improved Allan diagram can be formed. （2） There are six lithology docking patterns on the fault plane in the study area. The docking patterns with good sealing properties include breccia-mudstone, migmatite-mudstone, migmatite-gneiss, migmatite-breccia, and breccia-breccia. The peripheral faults F3 and F5 in the area are completely sealed, and the altitude of the leakage point in the area is -4 390 m. （3） Cross-verification was carried out by combining the fuzzy mathematics method and the on-site fluid distribution. The analysis results of each region were highly consistent with the lateral fault sealing analyzed by the improved Allan diagram method, indicating that the method shows excellent applicability and accuracy in metamorphic buried hills and has high application value.

Key words: improved Allan diagram method, fault sealing, gas storage, high-resolution geological modeling, Archean buried hill, Xinglongtai structural belt, Liaohe Depression

中图分类号: 

  • TE122

图1

辽河坳陷兴隆台构造带位置（a）及岩性地层综合柱状图（b）"

图2

传统Allan图原理示意图"

图3

基于高精度地质建模技术改进的Allan图分析过程"

表1

辽河坳陷兴隆台构造带南部断块潜山断层综合信息统计"

断
层		 性
质		 与地层
组合关系		 断距/m 埋深/m 走
向		 倾向 倾角/（°） 长度/m 与现今主应力关系/（°） 对盘岩性 对盘流体 断层泥
比率SGR		 断面正应力/MPa
F3 正 反向式 200~300 4 700 EW S 65~75 6.30 30~45 泥岩 无油气 0.81 40~60
F4 正 反向式 250~800 4 600 EW N—NE 65~75 4.60 85~95 角砾岩、混合岩 薄层差油层 0.35 40~60
F5 正 反向式 150~400 4 600 NE W 65~75 3.20 0~5 泥岩、片麻岩、煌斑岩 无油气 0.41 40~60
F6 正 同向式 50~300 4 400 EW S 65~75 2.20 30~45 泥岩、角砾岩、混合岩 油水界面
一致		 0.26 40~60

表2

辽河坳陷兴隆台构造带南部断块潜山断层侧向封闭性离散隶属度函数及权重系数"

影响因素 性质 隶属度 权重系数
断层性质 正断层 0.7 0.02
逆断层 1.0
与地层产状
组合关系		 正向式断层 1.0 0.02
反向式断层 0
断层倾角/(°) > 50 0.3 0.02
< 50 1.0
断层埋深/m > 4 500 1.0 0.02
< 4 500 0.7
断层断距/m > 500 1.0 0.02
< 500 0.7
与最大主应力
夹角/(°)		 垂直 1.0 0.05
夹角 0.7
平行 0.3
对盘岩性 储集岩 0 0.19
非储集岩 1.0
对盘流体性质 无油气显示 1.0 0.22
差油气层 0.8
油水界面不一致 0.4
油水界面一致 0
断层泥比率SGR > 0.60 1.0 0.19
0.30~0.60 0.5
< 0.30 0
断面正压力/MPa > 60 1.0 0.15
40~60 0.7
< 40 0.5

表3

辽河坳陷兴隆台构造带南部断块潜山断层侧向封闭性综合评判标准"

侧向封闭性 封闭 不封闭
评判指标B > 0.50 < 0.50

表4

辽河坳陷兴隆台构造带南部断块潜山模糊数学断层侧向封闭性评价结果"

断层 评判指标B 侧向封闭性
F3 0.91 封闭
F4 0.64 封闭
F5 0.83 封闭
F6 0.29 不封闭

图4

辽河坳陷兴隆台构造带南部断块潜山高精度构造模型建立过程"

图5

辽河坳陷兴隆台构造带南部断块潜山岩性统计"

图6

辽河坳陷兴隆台构造带南部断块潜山岩性-裂缝密度直方图"

图7

辽河坳陷兴隆台构造带南部断块潜山岩性配置方案"

图8

辽河坳陷兴隆台构造带南部断块潜山简化岩性模型"

图9

辽河坳陷兴隆台构造带南部断块潜山断面岩性对接情况精细刻画"

图10

辽河坳陷兴隆台构造带南部断块潜山基于改进的Allan图的应用评价"

图11

辽河坳陷兴隆台构造带南部断块潜山太古界油气藏剖面图"

图12

辽河坳陷兴隆台构造带南部断块太古界油气藏剖面（a）和原油物性对比（b）"

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