西南石油大学学报(自然科学版) ›› 2023, Vol. 45 ›› Issue (4): 43-54.DOI: 10.11885/j.issn.1674-5086.2021.10.25.05

• 地质勘探 • 上一篇    下一篇

鄂尔多斯盆地中生界断裂及对油藏的控制研究

罗安湘1, 刘广林1,2, 刘正鹏3, 沈田丹4, 马爽5   

  1. 1. 中国石油长庆油田公司勘探开发研究院, 陕西 西安 710018;
    2. 成都理工大学沉积地质研究院, 四川 成都 610059;
    3. 中国石油长庆油田公司勘探事业部, 陕西 西安 710018;
    4. 中国石油长庆油田公司第八采油厂, 陕西 西安 710021;
    5. 中国石油长庆油田公司第一采油厂, 陕西 西安 710018
  • 收稿日期:2021-10-25 出版日期:2023-08-10 发布日期:2023-07-18
  • 通讯作者: 刘广林,E-mail:liugl_cq@petrochina.com.cn
  • 作者简介:罗安湘,1968年生,男,汉族,湖南衡阳人,教授级高级工程师,主要从事石油地质方面的研究工作。E-mail:lax_cq@petrochina.com.cn;刘广林,1982年生,男,汉族,山西广灵人,高级工程师,博士,主要从事石油地质方面的研究。E-mail:liugl_cq@petrochina.com.cn;刘正鹏,1986年生,男,汉族,江西永新人,工程师,主要从事油气地质勘探方面的研究工作。E-mail:liuzhp31_cq@petrochina.com.cn;沈田丹,1983年生,男,汉族,湖北荆门人,工程师,主要从事油气田开发方面的研究工作。E-mail:shentiandan_cq@petrochina.com.cn;马爽,1982年生,女,汉族,黑龙江绥化人,工程师,硕士,主要从事油气田开发方面的研究工作。E-mail:ms_cq@petrochina.com.cn
  • 基金资助:
    国家科技重大专项(2016ZX05050, 2017ZX05001002-008);中国石油科技重大专项(2016E-0501)

Mesozoic Faults and Their Control on Oil Reservoirs in Ordos Basin

LUO Anxiang1, LIU Guanglin1,2, LIU Zhengpeng3, SHEN Tiandan4, MA Shuang5   

  1. 1. Research Institute of Exploration and Development, Changqing Oilfieid Company, Petrochina, Xi'an, Shaanxi 710018, China;
    2. Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu, Sichuan 610059, China;
    3. Exploration Department, Changqing Oilfield Company, PetroChina, Xi'an, Shaanxi 710018, China;
    4. No.8 Oil Production Plant, Changqing Oilfield Company, PetroChina, Xi'an, Shaanxi 710021, China;
    5. No.1 Oil Production Plant, Changqing Oilfield Company, PetroChina, Xi'an, Shaanxi 710018, China
  • Received:2021-10-25 Online:2023-08-10 Published:2023-07-18

摘要: 针对鄂尔多斯盆地西北部盐池县古峰庄地区断裂系统复杂和油藏分布不明确的问题,利用三维地震和平衡剖面恢复技术,精细识别断裂分布,刻画断面形态,恢复断层的启闭性,明确了断裂的形成期次和有利成藏条件。古峰庄地区发育3组断裂:印支期断裂多为正断层,呈雁列式NWW向展布,在早白垩世开启,具有沟通油源、高效输导油气的作用;燕山期断裂在工区西部发育,呈近NS向,多为逆冲断层,构造变形强烈,不利于油藏保存;喜马拉雅期断裂为NEE向,平行分布于工区,多为正断层,在成藏后形成,调整或破坏原生油藏。断裂发育区的成藏条件为:通源断裂在成藏期开启;圈闭在成藏期和现今条件好,且位于断层面凸面脊附近(源上成藏)或凹面脊附近(源下成藏)。研究成果对于断裂系统发育区油气勘探具有一定的指导意义。

关键词: 断面脊, 石油运聚, 天环拗陷, 盐池, 鄂尔多斯盆地

Abstract: Aiming at the problems of complex fault system and unclear reservoir distribution in Gufengzhuang Area, Yanchi County, northwest of Ordos Basin, using three-dimensional seismic and balanced profile restoration technology, we identify the fault distribution, delineate the morphology of the fault plane and restore the opening and closing state of the fault, and clarify the formation stage of the faults and favorable reservoir forming conditions. Three fault systems are developed in Gufengzhuang Area. Indosinian faults are mostly normal faults, distributed in en echelon arrangement in NWW direction, opened in the early Cretaceous, and played a role in connecting oil sources and efficiently transporting oil and gas. Yanshanian faults are developed in the west of the area, showing a nearly NS direction, mostly thrust faults, with strong structural deformation, which is not conducive to reservoir preservation. Himalayan faults are in NEE direction, distributed in parallel in the work area, mostly normal faults, formed after reservoir formation, adjusted or destroyed the primary reservoir. The reservoir forming conditions in the fault development area are as follows: the faults communicating with oil source opened in the reservoir forming period; the traps had good conditions and located near the convex ridge of the fault plane (reservoir forming above the source) or near the concave ridge (reservoir forming below the source). The research results have certain guiding significance for oil and gas exploration in fault system development areas.

Key words: fault plane ridge, oil migration and accumulation, Tianhuan Depression, Yanchi, Ordos Basin

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