Characterization and distribution of deeply-buried paleokarst carbonate reservoirs of Ordovician Yingshan Formation in northern slope of central Tarim Basin

doi:10.7623/syxb201603002

Acta Petrolei Sinica ›› 2016, Vol. 37 ›› Issue (3): 299-310.DOI: 10.7623/syxb201603002

• Petroleum Exploration • Previous Articles Next Articles

Characterization and distribution of deeply-buried paleokarst carbonate reservoirs of Ordovician Yingshan Formation in northern slope of central Tarim Basin

Yu Jingbo¹, Li Zhong¹, Yang Liu^1,2, Han Yinxue^1,3

1. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;
2. PetroChina Hangzhou Research Institute of Geology, Zhejiang Hangzhou 310023, China;
3. CNOOC Research Institute, Beijing 100027, China

Received:2015-08-11 Revised:2016-02-12 Online:2016-03-25 Published:2016-04-12

塔中北斜坡鹰山组深埋岩溶型储层刻画及分布规律

于靖波¹, 李忠¹, 杨柳^1,2, 韩银学^1,3

1. 中国科学院地质与地球物理研究所北京 100029;
2. 中国石油杭州地质研究院浙江杭州 310023;
3. 中海油研究总院北京 100027

通讯作者: 李忠,男,1964年9月生,1985年获武汉地质学院学士学位,1991年获中国地质大学(北京)博士学位,现为中国科学院地质与地球物理研究所研究员、博士生导师,主要从事沉积学与盆地动力学研究。Email:lizhong@mail.iggcas.ac.cn
作者简介:于靖波,男,1982年5月生,2002年获大庆石油学院学士学位,2011年获中国科学院大学博士学位,现为中国科学院地质与地球物理研究所博士后,主要从事碳酸盐岩储集体地震成像研究。Email:yujingbo@mail.iggcas.ac.cn
基金资助:
国家重大科技专项(2011ZX05008-003)和国家自然科学基金青年科学基金项目(No.41204059)资助。

Abstract

Abstract:

Abundant oil and gas has been discovered in the karst reservoirs of Yingshan Formation, central Tarim Basin. The large-scale 3D seismic data and vertical imaging logging data with high resolution provide the foundation for revealing the regional deeply-buried karst structure and its distribution laws. The imaging logging show four regional characteristics related to karst, i.e., dissolution pores, dissolution-enlarged fissures, karst-cave fillings and karst-cave collapse breccias. A single cave cannot be identified from a karst-cave system using 3D seismic records due to the restriction of resolution, but manifested as a complex showing beaded or mutton chop-shaped high amplitude anomaly as a whole. The spatial distribution of karst-cave complex is mapped using the spectral decomposition technology, and its volume is also estimated semi-quantitatively. In addition, based on imaging logging, 3D seismic data characteristics, and the log calibration with core data, the karst structure in the study area is described from different scales, as well as its distribution at different depths. The results demonstrate that karst reservoirs are significantly controlled by NW-SE thrust faults, as well as the corresponding regional paleo-morphology.

Key words: northern slope of central Tarim Basin, Yingshan Formation, karst reservoir, seismic attribute, imaging logging

摘要：

塔里木盆地塔中地区鹰山组岩溶型储层已发现丰富的油气,大面积的三维地震及垂向高分辨率成像测井资料为揭示本区深埋岩溶结构及其分布规律提供了基础。成像测井揭示出该区4种与岩溶有关的特征,分别为:溶孔、溶蚀扩大缝、溶洞充填物及溶洞垮塌角砾岩。对于三维地震记录,受其分辨率制约,无法从一个溶洞系统中分辨出单个洞穴,而是作为一个复合体整体上表现为串珠或"羊排"状强振幅异常。利用分频技术来刻画溶洞复合体的空间展布形态并对其体积进行半定量的估计,另外,基于成像测井及三维地震资料的特点,并用岩心资料进行标定,从不同尺度上刻画研究区岩溶结构及其在不同深度上的分布。结果表明岩溶型储层明显受控于NW-SE向逆冲断裂,区域上则受控于所处古地貌的位置。

关键词: 塔中北斜坡, 鹰山组, 岩溶型储层, 地震属性, 成像测井

CLC Number:

TE122.2

Yu Jingbo, Li Zhong, Yang Liu, Han Yinxue. Characterization and distribution of deeply-buried paleokarst carbonate reservoirs of Ordovician Yingshan Formation in northern slope of central Tarim Basin[J]. Acta Petrolei Sinica, 2016, 37(3): 299-310.

于靖波, 李忠, 杨柳, 韩银学. 塔中北斜坡鹰山组深埋岩溶型储层刻画及分布规律[J]. 石油学报, 2016, 37(3): 299-310.

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Characterization and distribution of deeply-buried paleokarst carbonate reservoirs of Ordovician Yingshan Formation in northern slope of central Tarim Basin

塔中北斜坡鹰山组深埋岩溶型储层刻画及分布规律

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