石油勘探与开发 >

2018 , Vol. 45 >Issue 5: 817 - 827

DOI: https://doi.org/10.11698/PED.2018.05.07

油气勘探

塔中地区鹰山组古岩溶潜水面及控储模式

  • 屈海洲 ,
  • 刘茂瑶 ,
  • 张云峰 ,
  • 王振宇 ,
  • 张正红 ,
  • 李世银 ,
  • 邓兴梁
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  • 1. 西南石油大学地球科学与技术学院,成都 610500;
    2. 中国石油集团碳酸盐岩储层重点实验室西南石油大学分室,成都 610500;
    3. 西南石油大学油气藏地质及开发工程国家重点实验室,成都 610500;
    4. 中国石油塔里木油田分公司,新疆库尔勒 841000
屈海洲（1987-）,男,河南信阳人,博士,西南石油大学地球科学与技术学院讲师,主要从事沉积学及储集层地质学的研究和教学工作。地址：四川省成都市新都区新都大道8号,西南石油大学地球科学与技术学院,邮政编码：610500。E-mail：quhz555@yahoo.com,quhaizhou@swpu.edu.cn

收稿日期: 2017-11-11

  网络出版日期: 2018-08-03

基金资助

国家自然科学基金（41702163、41702122）; 中石油集团碳酸盐岩储层重点实验室开放基金（2018-497）; 西南石油大学科研“启航计划”（2017QHZ008）

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Paleokarstic water tables and their control on reservoirs in Ordovician Yingshan Formation, Tazhong Area, Tarim Basin, NW China

  • QU Haizhou ,
  • LIU Maoyao ,
  • ZHANG Yunfeng ,
  • WANG Zhenyu ,
  • ZHANG Zhenghong ,
  • LI Shiyin ,
  • DENG Xingliang
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  • 1. School of Geosciences and Technology, Southwest Petroleum University, Chengdu 610500, China;
    2. Southwest Petroleum University Division of CNPC Key Laboratory of Carbonate Reservoirs, Chengdu 610500, China;
    3. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China;
    4. PetroChina Tarim Oilfield Company, Korla 841000, China

Received date: 2017-11-11

  Online published: 2018-08-03

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摘要

综合岩心、测井、岩溶古地貌等资料,研究塔中北斜坡鹰山组古岩溶多期次潜水面的识别方法、分布及控储模式。研究区鹰山组自下而上可识别出第1、2、3等3期潜水面,相应水平潜流带的典型判识特征分别为：囊状溶蚀孔洞层或近水平溶缝等单一岩溶组构,出现小型洞穴及不同岩溶组构之间的叠置组合,多层洞穴及孔径更大的不同岩溶组构的叠置组合。平面上,阶段上升的海平面使得岩溶洼地、斜坡、高地分别发育第1期、第1、2期、第1、2、3期潜水面,受控于岩溶期鹰山组近水平的地层产状,3期岩溶潜水面及之下水平潜流带内的缝洞体与各亚段地层夹角极小,导致岩溶储集层呈“区域穿层、局部顺层”的展布特征。各期的潜水面与不整合面之间距离、水平潜流带厚度、储集层平均厚度等参数均具有随着岩溶地貌升高而变大的趋势,具有2~3期潜水面及更大厚度水平潜流带的岩溶高地和斜坡,储集层套数更多、厚度更大,Ⅰ、Ⅱ类储集层更发育,是有利的勘探区域。图9表1参28

关键词： 古岩溶潜水面判识方法; 期次及分布; 控储模式; 奥陶系鹰山组; 塔中地区; 塔里木盆地

本文引用格式

屈海洲 , 刘茂瑶 , 张云峰 , 王振宇 , 张正红 , 李世银 , 邓兴梁 . 塔中地区鹰山组古岩溶潜水面及控储模式[J]. 石油勘探与开发, 2018 , 45(5) : 817 -827 . DOI: 10.11698/PED.2018.05.07

Abstract

Based on cores, well logging and karstic paleogeomorphology, the identification method of multi-period paleokarstic water tables and their distribution and control on reservoirs were researched of Yingshan Formation in Tazhong Area, Tarim Basin. Three periods’ water tables numbered 1 to 3 have been identified from bottom to top of Yingshan Formation in Tazhong Area. The corresponding typical horizontal undercurrent zones are characterized by single karst fabrics such as sack-like dissolved vugs or subhorizontal channels, combination of various karst fabrics like pre-existing high-angle fractures intersected by small caves and subhorizontal channels, and combination of multi-layered caves and different karst fabrics of large pores. On the plane, periodical rising sea levels caused the development of No.1, No.1 and 2, No.1, 2 and 3 water tables in karst depressions, slopes and highlands respectively. As the result of the nearly horizontal occurrence of Yingshan Formation, submembers of Yingshan Formation had tiny angles with fracture-cave bodies of each period’s water table, so the karst reservoirs are characterized by “crossed strata regionally and developed along the stratum locally”. The distance between water table and unconformity, thickness of horizontal undercurrent zone and average thickness of reservoir all tended to increase with the rise of karst landforms. The karst highland and slope had 2-3 periods’ water tables and thicker horizontal undercurrent zones, so they had thicker and better quality reservoirs, making them favorable exploration areas.

Key words： paleokarstic water table identification; stages and distribution; reservoir-controlled pattern; Ordovician Yingshan Formation; Tazhong area; Tarim Basin

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