岩性油气藏 ›› 2024, Vol. 36 ›› Issue (1): 69–77.doi: 10.12108/yxyqc.20240107

• 地质勘探 • 上一篇    下一篇

四川盆地元坝地区二叠系茅口组相控岩溶刻画及预测

李毕松, 苏建龙, 蒲勇, 缪志伟, 张文军, 肖伟, 张雷, 江馀   

  1. 中国石油化工股份有限公司勘探分公司, 成都 610041
  • 收稿日期:2023-01-17 修回日期:2023-03-12 出版日期:2024-01-01 发布日期:2024-01-02
  • 第一作者:李毕松(1984-),男,本科,高级工程师,主要从事海相碳酸盐岩油气勘探方面的研究工作。地址:(610041)成都市高新区吉泰路688号。Email:libs.ktnf@sinopec.com。
  • 通信作者: 苏建龙(1988-),男,硕士,副研究员,主要从事海相碳酸盐岩地震预测技术方面的研究工作。Email:su_jianlong@sina.com。
  • 基金资助:
    国家自然科学基金联合项目“海相深层油气富集机理与关键工程技术基础研究”（编号：U19B6003）、中国石化配套项目专题“四川盆地海相深层油气成藏模式与差异富集规律”（编号：P20078-04）及中国石化科技项目“四川盆地二叠系新类型储层地震预测技术研究”（编号：P21009）联合资助。

Facies-controlled karst characterization and effective reservoir prediction of Permian Maokou Formation in Yuanba area，Sichuan Basin

LI Bisong, SU Jianlong, PU Yong, MIAO Zhiwei, ZHANG Wenjun, XIAO Wei, ZHANG Lei, JIANG Yu   

  1. Sinopec Exploration Company, Chengdu 610041, China
  • Received:2023-01-17 Revised:2023-03-12 Online:2024-01-01 Published:2024-01-02

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摘要： 通过岩溶古地貌恢复、倾角约束增强相干、相控岩溶地震反演和非线性伽马模拟等技术，对四川盆地元坝地区二叠系茅口组相控岩溶异常及有效储层分布进行了研究。研究结果表明： ①四川盆地元坝地区二叠系茅口组在纵向上可划分为表层风化壳、垂直渗流带、水平潜流带3个岩溶作用带，茅三段相控岩溶储层受浅滩相带和岩溶作用共同控制，储层类型分为孔隙-孔洞型和半充填溶洞型。②岩溶残丘地貌相对较高，为岩溶作用供水区域，是相控岩溶发育的有利位置；溶丘平原地貌相对较低，为岩溶作用汇水区域。③倾角约束的增强相干技术可定性描述岩溶残丘内相控岩溶发育的有利带，研究区的该类储层主要分布于古地貌高部位，并呈北西向展布。④相控岩溶储层预测方法可以相对准确地预测有效岩溶储层的分布范围，研究区垄脊带、峰丛带岩溶储层最为发育，最大厚度为28 m。

关键词: 倾角约束的增强相干技术, 相控岩溶, 古地貌恢复, 岩溶地震刻画, 岩溶储层预测, 茅口组, 二叠系, 元坝地区, 四川盆地

Abstract: Through technologies such as karst paleogeomorphology restoration, dip angle constraint enhanced coherence, facies-controlled karst seismic inversion, and nonlinear gamma simulation, the distribution patterns of facies-controlled karst anomalies and effective reservoirs of Permian Maokou Formation in Yuanba area of Sichuan Basin were studied. The results show that:(1) The Permian Maokou Formation in Yuanba area can be vertically divided into three karst zones:surface weathered crust, vertical seepage zone, and horizontal subsurface flow zone. The facies-controlled karst reservoirs of the third member of Maokou Formation are jointly controlled by shallow shoal facies and karstification, and the reservoirs can be divided into pore-cavity type and semi-filled karst cave type.(2) The karst residual hills have relatively high landform, serving as a water supply area for karstification, and are favorable for the development of facies-controlled karst. The karst plains have relatively low landform and are catchment areas for karstification.(3) The enhanced coherence technique with dip angle constraint can qualitatively describe the favorable zones of facies-controlled karst development within the residual hills. This type of reservoir in the study area is mainly distributed in high areas of ancient landforms and is distributed in a northwest direction.(4) The prediction method of facies-controlled karst reservoirs can relatively accurately predict the distribution range of effective karst reservoirs. The karst reservoirs in the ridge and peak cluster zones in the study area are the most developed, with a maximum thickness of 28 m.

Key words: dip angle constraint enhanced coherence, facies-controlled karst, restoration of ancient landform, karst seismic characterization, karst reservoir prediction, Maokou Formation, Permian, Yuanba area, Sichuan Basin

中图分类号: 

  • TE122
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