西南石油大学学报(自然科学版) ›› 2019, Vol. 41 ›› Issue (5): 33-44.DOI: 10.11885/j.issn.1674-5086.2018.06.06.02

• 地质勘探 • 上一篇    下一篇

哈拉哈塘奥陶系缝洞型成岩圈闭及其成因

闵华军1,2, 贾祥金3, 田建军3, 蔡泉4, 赵少泽2   

  1. 1. “油气藏地质及开发工程”国家重点实验室·成都理工大学, 四川 成都 610059;
    2. 成都理工大学能源学院, 四川 成都 610059;
    3. 中国石油测井有限公司吐哈分公司, 新疆 吐鲁番 838202;
    4. 中国石油塔里木油田分公司, 新疆 库尔勒 841000
  • 收稿日期:2018-06-06 出版日期:2019-10-10 发布日期:2019-10-10
  • 通讯作者: 闵华军,E-mail:minesky@126.com
  • 作者简介:闵华军,1986年生,男,汉族,四川内江人,博士研究生,主要从事非常规油气地质方面工作。E-mail:minesky@126.com;贾祥金,1982年生,男,汉族,山东新泰人,工程师,主要从事生产测井的现场采集工作。E-mail:31818668@qq.com;田建军,1980年生,男,汉族,四川仁寿人,工程师,主要从事生产测井和安全管理工作。E-mail:tjjthcj@cnpc.com.cn;蔡泉,1979年生,男,汉族,四川遂宁人,工程师,硕士,主要从事碳酸盐岩沉积储层、油气藏地质综合研究工作。E-mail:caiquantlm@petrochina.com.cn;赵少泽,1992年生,男,汉族,河北鸡泽人,博士研究生,主要从事石油与天然气地质勘查与评价方面的研究。E-mail:2474668327@qq.com

Ordovician Fractured-vuggy Diagenetic Trap and Its Genesis in Hanikatam Formation

MIN Huajun1,2, JIA Xiangjin3, TIAN Jianjun3, CAI Quan4, ZHAO Shaoze2   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichuan 610059, China;
    2. College of Energy Resources, Chengdu University of Technology, Chengdu, Sichuan 610059, China;
    3. CNPC Well Logging Co. Ltd., Turpan, Xinjiang 838202, China;
    4. Tarim Oilfield Company, PetroChina, Korla, Xinjiang 841000, China
  • Received:2018-06-06 Online:2019-10-10 Published:2019-10-10

摘要: 针对塔里木盆地塔北哈拉哈塘油田碳酸盐岩缝洞型成岩圈闭,综合利用区域地质、钻录井、酸化压裂、压力测试、生产动态等动静态资料,探讨圈闭的动态识别方法、特征及成因。研究认为,由于碳酸盐岩缝洞型储层渗透率高,一定条件下可以利用井口油压数据绘制Np-△p图,并以此判断油藏属于开放性油藏还是封闭性成岩圈闭油藏;研究区缝洞型成岩圈闭规模总体较小,储层类型以洞穴型为主,圈闭盖层岩性、储盖组合及遮挡条件多样,发育多种圈闭要素组合模式;多期充填叠加是研究区缝洞型成岩圈闭封闭的根本原因,新近纪以来大规模快速沉降引发的成岩充填可能是大多数缝洞型成岩圈闭封闭的直接原因,沉降同时导致部分油藏形成异常高压。

关键词: 哈拉哈塘, 缝洞型储层, 成岩圈闭, 圈闭成因, 异常高压

Abstract: This study focuses on the analysis of Ordovician fractured-vuggy carbonate diagenetic trap of the Halahatang oil reservoir in the north of Tarim Basin. By combining static and dynamic information such as regional geology, drilling time log, acid fracturing, pressure testing, and production dynamics, we discuss the dynamic identification method, characteristics, and genesis of traps. We hold that the wellhead oil pressure drop can be used to replace the formation pressure drop for plotting the Np-△p diagram due to the high permeability of fractured-vuggy carbonate oil reservoir. The diagram can be further used to determine if the oil reservoir is an open reservoir or a closed diagenetic trap reservoir. The total number of fractured-vuggy diagenetic traps is relatively small in the area. Cave reservoir being the major type of reservoir. Combinations of multiple other trap elements developed with various lithology of trap cover, reservoir cover combination, and diverse occlusion conditions. The multi-stage filling and stacking is found to be the fundamental cause of the closure of fractured-vuggy diagenetic trap. The diagenetic filling caused by large-scale rapid settlement since the Neogene may be the direct cause of the closure of most fractured-vuggy diagenetic traps. These settlements simultaneously result in abnormal formation pressure in some parts of the reservoir.

Key words: Hanikatam, fractured-vuggy reservoir, diagenetic trap, trap genesis, abnormal formation pressure

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