鄂尔多斯盆地姬塬地区三叠系延长组9段致密砂岩储层产能测井预测及勘探意义

doi:10.7623/syxb202511007

石油学报 ›› 2025, Vol. 46 ›› Issue (11): 2091-2105.DOI: 10.7623/syxb202511007

• 地质勘探 • 上一篇

鄂尔多斯盆地姬塬地区三叠系延长组9段致密砂岩储层产能测井预测及勘探意义

张兆辉^1,2, 张皎生³, 廖建波⁴, 李超³, 邹建栋³, 张闻亭⁴

1. 新疆大学地质与矿业工程学院新疆乌鲁木齐 830047;
2. 甘肃省油气资源研究重点实验室甘肃兰州 730000;
3. 中国石油长庆油田公司勘探开发研究院陕西西安 710018;
4. 中国石油勘探开发研究院西北分院甘肃兰州 730020

收稿日期:2025-02-05 修回日期:2025-06-10 发布日期:2025-12-04
通讯作者: 张兆辉,男,1982年7月生,2020年获中国科学院西北生态环境资源研究院博士学位,现为新疆大学地质与矿业工程学院副教授,主要从事测井地质学、非常规油气储层预测和三维地质建模方面的教学与研究工作。
作者简介:张兆辉,男,1982年7月生,2020年获中国科学院西北生态环境资源研究院博士学位,现为新疆大学地质与矿业工程学院副教授,主要从事测井地质学、非常规油气储层预测和三维地质建模方面的教学与研究工作。Email:zhangzhaohui@xju.edu.cn
基金资助:
新疆维吾尔自治区“天池英才”引进计划项目“基于沉积-成岩补偿评价的致密砂岩储层甜点预测”(51052300560)、国家自然科学基金项目“致密砂岩沉积层理地震响应机制及岩石相预测方法研究”(No.42464006)和甘肃省油气资源研究重点实验室开放基金项目“致密砂岩全尺度岩石相数字建模及其地震响应分析”(SZDKFJJ 2023007)资助。

Productivity prediction and exploration significance of tight sandstone reservoir in the Member 9 of Triassic Yanchang Formation in Jiyuan area,Ordos Basin

Zhang Zhaohui^1,2, Zhang Jiaosheng³, Liao Jianbo⁴, Li Chao³, Zou Jiandong³, Zhang Wenting⁴

1. School of Geology and Mining Engineering, Xinjiang University, Xinjiang Urumqi 830047, China;
2. Gansu Provincial Key Laboratory of Petroleum Resources Research, Gansu Lanzhou 730000, China;
3. Research Institute of Exploration and Development, PetroChina Changqing Oilfield Company, Shaanxi Xi'an 710018, China;
4. PetroChina Research Institute of Petroleum Exploration and Development-Northwest, Gansu Lanzhou 730020, China

Received:2025-02-05 Revised:2025-06-10 Published:2025-12-04

摘要/Abstract

摘要： 鄂尔多斯盆地三叠系延长组9段(长9段)致密砂岩储层具有低孔、低渗、低含油饱和度与强非均质性等特点,其储层分类及产能预测难度较大。利用姬塬地区长9段31个储层段的试油结果以及对应的测井数据响应特征与测井解释结果,分别建立了多个测井属性与产能之间的配置关系。研究结果表明:具有平滑箱型/钟型砂体结构的储层的产能整体较高,且产能随着储层有效厚度、孔隙度以及含油饱和度的增大呈整体上升的趋势;其中,产能与储层物性的相关性高于储层电性,产能与测井数据原始属性的相关性高于间接计算属性。基于此,提出了多种测井属性相融合的致密砂岩储层产能预测方法:首先,利用自然伽马曲线的相对重心和均质度属性,筛选出具有平滑箱型/钟型砂体结构的储层;然后结合储层有效厚度、深侧向电阻率测井和密度测井数据等关键影响因素,构建致密砂岩储层的产能潜力综合评价指标和产能预测模型,并据此建立储层分类标准。利用该方法对姬塬地区长9段10个致密砂岩层段的产能进行了分类和预测检验,结果显示对储层开展分类识别的正确率达90 %,产油量预测的符合率为80 %,由此验证了该方法模型的有效性与实用性。该方法突出了致密砂岩储层的砂体结构、物性和有效厚度等因素对产能的综合影响,有效提高了测井曲线的产能预测能力,对开展致密砂岩储层的分类及产能研究具有较好的参考价值。

关键词: 致密砂岩, 常规测井, 属性融合, 储层分类, 产能预测, 三叠系, 姬塬地区, 鄂尔多斯盆地

Abstract: The tight sandstone reservoirs in the Member 9 of Triassic Yanchang Formation in Ordos Basin are characterized by low porosity, low permeability, low oil saturation, and strong heterogeneity, making reservoir classification and productivity prediction particularly challenging. In this study, oil test results from 31 reservoir intervals of the Member 9 of Yanchang Formation in the Jiyuan area, combined with corresponding logging curve responses and interpretation results, are utilized to establish the correlations between multiple logging parameters and productivity. The study results indicate that reservoirs characterized by smooth box-shaped or bell-shaped sandbody structures generally exhibit high productivity. Additionally, hydrocarbon productivity shows an overall upward trend with increases in the effective thickness, porosity and oil saturation of reservoirs. The correlation between productivity and reservoir physical properties is stronger than that with electrical properties, and the correlation between productivity and directly measured original logging parameters is higher than that with indirectly calculated parameters based on models. Based on these findings, a productivity prediction method for tight sandstone reservoirs is proposed, integrating multiple logging parameters. Firstly, reservoirs with smooth box-shaped or bell-shaped sandbody structures are selected using attributes such as the relative center of gravity of the natural gamma curve and homogeneity. Moreover, by incorporating key influencing factors, including effective thickness, deep resistivity, and density logging data, both comprehensive evaluation index and productivity prediction model for tight sandstone reservoirs has been developed. Finally, reservoir classification criteria based on productivity capacity indicators are established. The proposed method was applied to classify and predict the productivity of 10 tight sandstone reservoir intervals in the Member 9 of Yanchang Formation of Jiyuan area. The results show that the accuracy of reservoir classification reaches 90 %, while the oil production prediction accuracy rate is 80 %, thus validating the effectiveness and practicality of the model. This method highlights the comprehensive influence of factors such as sandbody structure, physical properties, and effective thickness on the productivity of tight sandstone reservoirs. It effectively enhances the productivity prediction capability of logging curves, providing valuable insights for the classification and productivity research of tight sandstone reservoirs.

Key words: tight sandstone, conventional logging, attribution fusion, reservoir classification, productivity prediction, Triassic, Jiyuan area, Ordos Basin

中图分类号:

TE155

张兆辉, 张皎生, 廖建波, 李超, 邹建栋, 张闻亭. 鄂尔多斯盆地姬塬地区三叠系延长组9段致密砂岩储层产能测井预测及勘探意义[J]. 石油学报, 2025, 46(11): 2091-2105.

Zhang Zhaohui, Zhang Jiaosheng, Liao Jianbo, Li Chao, Zou Jiandong, Zhang Wenting. Productivity prediction and exploration significance of tight sandstone reservoir in the Member 9 of Triassic Yanchang Formation in Jiyuan area,Ordos Basin[J]. Acta Petrolei Sinica, 2025, 46(11): 2091-2105.

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鄂尔多斯盆地姬塬地区三叠系延长组9段致密砂岩储层产能测井预测及勘探意义

Productivity prediction and exploration significance of tight sandstone reservoir in the Member 9 of Triassic Yanchang Formation in Jiyuan area,Ordos Basin

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