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塔里木盆地塔河10区奥陶系断裂特征及对岩溶储层的控制作用

韩长城1，林承焰1，任丽华1，鲁新便2，魏婷3，张宪国1   

  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
  • 收稿日期:2015-07-10 修回日期:2015-09-05 出版日期:2016-05-10 发布日期:2016-05-10
  • 作者简介:韩长城(1984-)，男，新疆阿勒泰人，博士研究生，主要从事碳酸盐岩油藏精细描述研究. E-mail:517892849@qq.com.
  • 基金资助:
    国家重大科技专项“复杂油气藏精细表征及剩余油分析预测”(编号:2011ZX05009-003);国家自然科学基金项目(编号:41202092);中国石油大学（华东）研究生创新工程项目（编号：YCXJ2016003）联合资助.

Characteristics of Ordovician fault in the Block 10 of Tahe Oilfield, Tarim Basin and its controlling effect on karst reservoirs

Han Chang-cheng1，Lin Cheng-yan1，Ren Li-hua1，Lu Xin-bian2，Wei Ting3，Zhang Xian-guo1   

  1. 1.School of Geosciences,China University of Petroleum,Qingdao 266580,China;
    2.Northwest Oilfield Company,SINOPEC,Urumqi 830011,China;
    3.Shixi Oil Production Plant,Xinjiang Oilfield Company,PetroChina,Karamay 834000,China
  • Received:2015-07-10 Revised:2015-09-05 Online:2016-05-10 Published:2016-05-10

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摘要： 随着塔里木盆地奥陶系碳酸盐岩油藏勘探与开发的进展，断裂对碳酸盐岩岩溶储层的控制作用越来越受到关注。通过岩心、薄片、钻井和测井等资料，分析溶蚀洞穴型、溶蚀孔缝型和裂缝型3类储集体特征；从构造演化特征方面对断裂进行分期，根据断裂期次、规模及对岩溶储层的控制作用将断裂分为Ⅱ级、Ⅲ1级和Ⅲ2级，并系统探讨了断裂对岩溶储层的发育和油气成藏的控制作用。综合分析结果表明，塔河油田10区奥陶系主要发育加里东中晚期、海西早期和海西晚期3期断裂，其中海西期断裂对岩溶储层的形成和发育起着决定作用，Ⅱ级和Ⅲ1级断裂对岩溶储层发育和油气成藏控制作用最为重要。断裂不仅促使表层岩溶作用发生和岩溶储层形成，控制古地貌的形态、古水系分布和热液岩溶作用的发生，促进深部岩溶作用发生和裂缝的发育，同时断裂对油气运移和聚集也起着重要的控制作用。该认识对碳酸盐岩油气进一步勘探开发具有重要的参考作用。

关键词: 深部岩溶储层, 断裂分期, 断裂分级, 碳酸盐岩储集体, 岩溶作用

Abstract: As with the development of exploring and developing of Ordovician carbonate reservoirs in Tarim Basin,the controlling effect of fault on carbonate reservoirs has drawn more and more attention.On the basis of cores,thin sections,drilling and well-logginganalyses,the reservoir is classified into three types,dissolution vug,dissolution pore-fracture and fractures.According to the structural evolution characteristics,taking fault times,scale and the controlling effect of karst reservoirs into consideration,the faults are classified into three grades including grade Ⅱ,grade Ⅲ-1 and grade Ⅲ-2.Faults’ controlling effect on the development of karst reservoirs and oil and gas entrapment were systematicallysummarized.Based on the comprehensive analysis,Ordovician in the Block 10 of Tahe Oilfield mainly developed three periods of faults,respectively in Late Caledonian,Early Hercynian and Late Hercynian.The Hercynian fracture plays decisive role in the formation and development of karst reservoirs,and grade Ⅱ and grade Ⅲ-1 turn out to be the most important for the development of karst reservoirs and oil and gas entrapment.Faults not only promote development of shallow karst and the formation of fractures,but also control the ancient geomorphology,the distribution of ancient water system and hydrothermal karstification.At the same time,the faults also play an important role in controlling the migration and accumulation of oil and gas.The understanding provides significant guidance of further exploration and development of carbonate oil and gas reservoir.

Key words: Deep karst reservoirs, Fault stage, Fault grading, Carbonate reservoirs, Karstification

中图分类号: 

  • TE122.2

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