石油与天然气地质 ›› 2016, Vol. 37 ›› Issue (5): 644-652.doi: 10.11743/ogg20160504

• [油气地质] • 上一篇    下一篇

塔河油田奥陶系碳酸盐岩岩溶斜坡断控岩溶储层特征及形成机制

韩长城1, 林承焰1, 鲁新便2, 任丽华1, 魏婷3, 张宪国1, 段宏臻4   

  1. 1. 中国石油大学(华东) 地球科学与技术学院, 山东 青岛 266580;
    2. 中国石化 西北油田分公司, 新疆 乌鲁木齐 830011;
    3. 中国石油 新疆油田分公司 石西采油厂, 新疆 克拉玛依 834000;
    4. 中国石油集团测井有限公司 青海事业部, 甘肃 敦煌 736202
  • 收稿日期:2015-11-09 修回日期:2016-05-07 出版日期:2016-10-08 发布日期:2016-11-07
  • 作者简介:韩长城(1984-),男,博士研究生,碳酸盐岩油藏精细描述。E-mail:517892849@qq.com。
  • 基金资助:
    国家科技重大专项(2011ZX05009-003);国家自然科学基金项目(NO.41602135);中国石油大学(华东)研究生创新工程项目(YCXJ2016003)。

Characterization and genesis of fault-controlled karst reservoirs in Ordovician carbonate karst slope of Tahe oilfield,Tarim Basin

Han Changcheng1, Lin Chengyan1, Lu Xinbian2, Ren Lihua1, Wei Ting3, Zhang Xianguo1, Duan Hongzhen4   

  1. 1. School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China;
    2. Northwest Oilfield Company, SINOPEC, Urumqi, Xinjiang 830011, China;
    3. Shixi Oil Production Plant, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China;
    4. CNPC Logging Qinghai Business Division, Dunhuang, Gansu 736202, China
  • Received:2015-11-09 Revised:2016-05-07 Online:2016-10-08 Published:2016-11-07

摘要: 随着塔河油田主体区潜山风化壳岩溶勘探开发的不断深入,斜坡区的内幕岩溶储集层越来越受到人们的关注,断裂对岩溶储集层的形成和分布具有重要控制作用。综合利用岩心、薄片、测井、钻井和地震资料,在储集层类型基础上,分析了断裂对岩溶储集层发育的控制作用及断控岩溶储集层分布规律,探讨了断控岩溶储集层的形成机制和演化特征。断裂和岩溶储集层发育规模、期次存在着一定的耦合关系,多期次继承发育的Ⅱ级和Ⅲ-1级断裂对岩溶储集层控制作用明显。平面上岩溶储集层沿断裂呈条带状分布,垂向上储集层分布在距奥陶系一间房组顶面0~50和100 m~150 m范围内。深部岩溶储集层形成作用主要有大气淡水溶蚀作用、TSR(硫酸盐热化学还原反应)、热液溶蚀作用和混合溶蚀作用4种类型,海西早期是断控岩溶储集层发育的主要时期。

关键词: 断控岩溶储集层, 斜坡区, 断裂带, 奥陶系, 塔河油田

Abstract: The internal karst reservoirs in the slope area of Tahe oilfield,Tarim Basin have attracted more and more attention as further exploration and development were carried out in the weathering crust karst reservoirs in the buried hills of the main blocks in the field.It is generally agreed that faults control the formation and distribution of karst reservoirs.Based on reservoir classification,the paper analyzed control effect of faults upon karst reservoirs and their distribution and discussed forming mechanism and evolving characteristics of the reservoirs through study of core,thin sections,logging and drilling as well as seismic data.A coupling relationship between extent and phases of development of faults and karst reservoirs was revealed during the analyses.Multi-phased and inherited faults of grade Ⅱ and Ⅲ-1 seemed to have a more prominent controlling effect upon the karst reservoirs.Horizontally,the reservoirs distributed as belts along faults; and vertically,they were observed to occur within intervals 0-50 m or 100-150 m below the top of the Ordovician Yijianfang Formation.The paper also suggested that these reservoirs were formed mainly by meteoric water dissolution,TSR (Thermochemical Sulfate Reduction),hydrothermal dissolution,and hybrid dissolution.The Early Hercynian was believed to be the main stage for the development of the fault-controlled karst reservoirs in the field.

Key words: fault-controlled karst reservoir, slope zone, fault zone, Ordovician, Tahe oilfield

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