岩性油气藏 ›› 2025, Vol. 37 ›› Issue (6): 151–161.doi: 10.12108/yxyqc.20250614

• 地质勘探 • 上一篇    下一篇

川东北元坝地区三叠系须家河组四段致密储层现今地应力测井评价

李春阳1, 王勃力2,3, 颜晓1, 李可赛3,4, 邓虎成3,4, 苏锦义1, 吴亚军1, 叶泰然1   

  1. 1. 中国石化西南油气分公司 勘探开发研究院, 成都 610041;
    2. 成都工业学院 岩土工程技术研究中心, 成都 610031;
    3. 成都理工大学 油气藏地质及开发工程国家重点实验室, 成都 610059;
    4. 成都理工大学 能源学院(页岩气现代产业学院), 成都 610059
  • 收稿日期:2025-04-22 修回日期:2025-06-29 出版日期:2025-11-01 发布日期:2025-11-07
  • 第一作者:李春阳（1992—），男，博士，副研究员，主要从事川北陆相油气勘探开发部署方面的研究工作。地址：（610041）四川省成都市高新区吉泰路688号。Email：lcyhanyang1993@163.com。
  • 通信作者: 王勃力(1987—),男,博士,副教授,主要从事储层地质力学、油气田开发地质方面的研究工作。Email:345880201@qq.com。
  • 基金资助:
    国家自然科学基金“多尺度裂缝性储层中随钻方位电磁波测井响应机理研究”（编号：42404144），成都工业学院博士人才项目“基于深部钻孔的现今地应力分布评价与应用”（编号：2023RC051），中国石化西南油气分公司科技项目“川北地区断裂输导体系与成藏关系研究”（编号：KJ-792-2403），中国石化西南油气分公司科技项目“川东北地区须家河气藏潜力评价”（编号：YTBXD-QTKF-2022-001-001）和中国石化西南油气分公司科技项目“元坝东须四气藏开发关键技术”（编号：KJ-744-2308）联合资助。

Current geostress logging evaluation of tight reservoir in the fourth member of Triassic Xujiahe Formation in Yuanba area, northeastern Sichuan Basin

LI Chunyang1, WANG Boli2,3, YAN Xiao1, LI Kesai3,4, DENG Hucheng3,4, SU Jinyi1, WU Yajun1, YE Tairan1   

  1. 1. Sinopec Southwest Oil & Gas Field Exploration and Development Research Institute, Chengdu 610041, China;
    2. Research Center of Geotechnical Engineering Technology, Chengdu University of Technology, Chengdu 610031, China;
    3. National Key Laboratory of Oil and Gas Reservoir Geology and Development Engineering, Chengdu University of Technology, Chengdu 610059, China;
    4. Energy College, Chengdu University of Technology, Chengdu 610059, China
  • Received:2025-04-22 Revised:2025-06-29 Online:2025-11-01 Published:2025-11-07

PDF (PC)

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摘要： 川东北元坝地区自三叠纪以来受多期次构造应力作用，具有复杂的断裂、褶皱及地应力耦合特征，现今地应力的准确评价已成为气藏高效开发的关键因素之一。基于偶极横波、电成像、多井径及常规测井等资料，开展了元坝地区三叠系须家河组四段的现今地应力测井评价，并重新厘定了其构造变形时空序列。研究结果表明：①川东北元坝地区自燕山期以来主要经历了燕山中晚期的NW—SE向、喜山早期—中期的NE—SW向挤压推覆构造作用，形成了NE向构造叠加NW向改造，多期次、多走向断裂发育的现今构造格局。②须家河组四段最大水平主应力主要为110~140 MPa，最小水平主应力主要为80~100 MPa，垂向主应力主要为105~125 MPa，三向应力关系具有σH > σV> σh的走滑应力状态；区域主应力方向为NWW—SEE向。③地应力大小总体受埋深控制，断裂应力释放调整了地应力的分布特征，纵向上三叠系须家河组四段中亚段泥岩发育，受泥岩的蠕变性影响，上部地应力大小整体偏高。研究成果可为气田地质工程“甜点”优选、天然裂缝有效性分析和储层人工压裂改造等提供参考。

关键词: 构造演化, 致密储层, 现今地应力, 岩石力学参数, 测井评价, 须家河组, 三叠系, 元坝地区, 川东北

Abstract: Yuanba area in northeastern Sichuan Basin has been subjected to multi-stage tectonic stress since Triassic, with complex coupling characteristics of faults, folding and geostress. Accurate evaluation of current geostress has become one of the key factors for the efficient development of gas reservoir. Based on the data from dipole shear waves, electrical imaging, multi-caliper, and conventional well logging, the current geostress logging evaluation of the fourth member of Triassic Xujiahe Formation in Yuanba area was carried out, and the spatiotem-poral sequence of structural deformation was redefined. The results show that: (1) Since Yanshanian period, Yuanba area in northeastern Sichuan Basin has primarily experienced NW-SE compression and thrusting during LateMiddle Yanshanian, followed by NE-SW compression and thrusting during Early-Middle Himalayan. This tectonic history resulted in the current structure framework of NE-trending structure superposition, NW-oriented modification, and multiple stages fault development with diverse orientations.(2) In the fourth member of Triassic XujiaheFormation of Yuanba area, the maximum horizontal principal stress(σH)ranges from 110 MPa to 140 MPa, the minimum horizontal principal stress(σh)ranges from 80 MPa to 100 MPa, and the vertical principal stress(σV)mainly ranges from 105 MPa to 125 MPa. The relationship of these three principal stress(σH > σV > σh)exhibits a strike-slip stress state, with the regional principal stress direction being NWW-SEE.(3) The geostress is generally controlled by burial depth, and the release of fault stress adjusts the distribution characteristics of geostress.Vertically, mudstone in the middle section of the fourth member of Triassic Xujiahe Formation is developed, and the overall magnitude of geostress in the upper part is higher due to the creep deformation of the mudstone. The research results can provide reference for the selection of sweet spots in gas field geological engineering, analysis of the effectiveness of natural fractures, and artificial fracturing of reservoirs.

Key words: tectonic evolution, tight reservoir, current geostress, rock mechanic parameter, logging evaluation, Xujiahe Formation, Triassic, Yuanba area, northeastern Sichuan Basin

中图分类号: 

  • TE122
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