库车坳陷白垩系亚格列木组深层致密砂岩裂缝成因与控储意义

范坤宇; 马奔奔; 何巧林; 陆永潮; 胡方杰; 古志强; 孙金佳杰; 肖文

doi:10.19509/j.cnki.dzkq.tb20250152

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库车坳陷白垩系亚格列木组深层致密砂岩裂缝成因与控储意义

资源地质与工程 | 更新时间：2026-11-05

- 库车坳陷白垩系亚格列木组深层致密砂岩裂缝成因与控储意义
- 库车坳陷白垩系亚格列木组深层致密砂岩裂缝成因与控储意义
- 地质科技通报 2026年45卷第4期页码：23-37
- 作者机构：
  
  1. 中国石油塔里木油田公司
  2. 中国石油天然气集团有限公司超深层复杂油气藏勘探开发技术研发中心
  3. 新疆维吾尔自治区超深层复杂油气藏勘探开发工程研究中心
  4. 中国地质大学(武汉)资源学院
  5. 中国地质大学(武汉)深圳研究院
- 作者简介：
- 基金信息：
  
  广东省自然科学基金面上项目（2025A1515011937）
- DOI：10.19509/j.cnki.dzkq.tb20250152
  中图分类号： P618.13
- 纸质出版：2026
- 稿件说明：
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范坤宇, 马奔奔, 何巧林, 等. 库车坳陷白垩系亚格列木组深层致密砂岩裂缝成因与控储意义[J]. 地质科技通报, 2026,45(4):23-37.

范坤宇, 马奔奔, 何巧林, et al. 库车坳陷白垩系亚格列木组深层致密砂岩裂缝成因与控储意义[J]. Bulletin of Geological Science and Technology, 2026, 45(4): 23-37.
范坤宇, 马奔奔, 何巧林, 等. 库车坳陷白垩系亚格列木组深层致密砂岩裂缝成因与控储意义[J]. 地质科技通报, 2026,45(4):23-37. DOI： 10.19509/j.cnki.dzkq.tb20250152.

范坤宇, 马奔奔, 何巧林, et al. 库车坳陷白垩系亚格列木组深层致密砂岩裂缝成因与控储意义[J]. Bulletin of Geological Science and Technology, 2026, 45(4): 23-37. DOI： 10.19509/j.cnki.dzkq.tb20250152.

摘要

深层-超深层致密砂岩储层具有巨大油气勘探潜力，裂缝的发育与空间分布是深层-超深层致密砂岩储集性能改善的关键因素。为明确致密砂岩裂缝成因与控储意义，以塔里木盆地库车坳陷白垩系亚格列木组为研究对象，综合钻井岩心、铸体薄片、激光共聚焦、扫描电镜、碎屑锆石测年、重矿物组成及碳氧稳定同位素等分析，查明亚格列木组深层致密砂岩裂缝的成因类型与主控因素，建立裂缝控储演化模式。结果表明：A井区岩石类型主要为岩屑砂岩和长石岩屑砂岩，岩屑类型以变质岩为主，B井区岩石类型主要为岩屑砂岩，岩屑类型以沉积岩和岩浆岩为主，B井区岩屑含量更高。研究区主要发育3期构造裂缝：(1)第Ⅰ期裂缝开度较宽（2～4 mm），为高角度、近垂直缝（70°～90°），裂缝平直光滑，以剪切缝为主，缝内方解石充填，充填时间在65～45 Ma，对应为燕山晚期-喜山早期缓慢浅埋藏阶段；(2)第Ⅱ期裂缝开度较窄（1～2 mm），为中、高角度缝（40°～60°），裂缝略微弯曲，以张-剪复合缝为主，缝内高岭石胶结物充填，裂缝充填时间在40～20 Ma，对应为喜山中期快速深埋阶段；(3)第Ⅲ期裂缝开度最窄（0.2～1 mm），为低角度缝、近水平缝（10°～30°），裂缝弯曲，主要以张性缝为主，缝内铁白云石胶结物充填，充填时间在10～6 Ma，对应为喜山晚期推覆调整阶段。在统一构造挤压背景下，由于不同物源体系和岩石组分，A井区和B井区裂缝控储模型存在差异性：A井区脆性矿物含量高，在强烈构造挤压过程中裂缝的发育程度高，有利于储层后期酸性溶蚀，增孔提渗效应明显。因此，整体上A井区储层质量要好于B井区。研究结果可为库车坳陷深层致密砂岩油气高效勘探开发提供地质依据。

Abstract

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