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中南大学学报(自然科学版)

Journal of Central South University

第46卷    第12期    总第256期    2015年12月

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文章编号:1672-7207(2015)12-4568-10
塔北哈拉哈塘地区古生代断裂-裂缝系统特征及其与奥陶系岩溶储层关系
石书缘,刘伟,姜华,徐兆辉,黄擎宇,陶小晚

(中国石油勘探开发研究院,北京,100083)

摘 要: 以岩心、成像测井和地震数据为基础,采用岩心分析、成像测井分析、蚂蚁体追踪和地震剖面解释等技术手段研究塔北哈拉哈塘地区古生代断裂-裂缝系统特征及其与奥陶系岩溶储层的关系。研究结果表明:奥陶系碳酸盐岩储层以大型溶洞、溶蚀孔洞和溶蚀裂缝为主。通过地震解释,将研究区断裂进行分期、分级,划分成加里东中期I幕、II幕、III幕和海西早期、海西晚期5个幕次,与不同级次断裂匹配明确I级断裂主要是指海西期断裂,包括部分加里东中期断裂再次活动的断裂;II级断裂包括加里东中期II幕和加里东中期III幕断裂;III级断裂对应加里东中期I幕断裂。以哈6区块取心井完整裂缝统计为基础,将研究区内裂缝划分成构造溶蚀缝、成岩缝和缝合线3种类型。建立岩心、成像测井、蚂蚁体的3级尺度裂缝,多尺度断裂-裂缝连通网络体系,多期次发育的构造溶蚀缝和缝合线对岩溶储层的形成具有重要影响。明确断裂系统与大型溶洞储层主方位走向基本一致,且溶洞发育与其距断裂的距离密切相关,距离约为300 m时,溶洞系统密度发育最大。

 

关键字: 塔里木盆地;奥陶系;裂缝;断裂系统;岩溶储层;缝合线

Characteristics of Paleocene fault-fracture system andtheir relationship with Ordivician Paleokarst reservoirs inHalahatang area, north Tarim Bain
SHI Shuyuan, LIU Wei, JIANG Hua, XU Zhaohui, HUANG Qingyu, TAO Xiaowan

Petrochina Research Institution of Petroleum Exploration & Development, Beijing 100083, China

Abstract:Based on the core, image logging and seismic data, using the core analysis, image logging processing, ant tracking and seismic interpretation, the characteristics of Paleocene fault-fracture system and their relationship with Ordivician Paleokarst reservoirs in Haalahatang area, north Tarim Bain were studied. The results show that the reservoir types mainly consist of large cavity, corrosion pore system and corrosion fracture. The Paleozoic fractures of the study area are divided into middle Caledonian movement and Hercynian movement which contained five episodes. Class I fracture mainly refers to the Hercynian faults, which includes reactive rupture of the middle Caledonian fracture, and Class II fracture is mainly the middle Caledonian act II and mid Caledonian act III fracture, Class III fracture is mainly the middle Caledonian act I fracture. Combined with achievements of core, well logging and ant tracking, a multi-scale fault-fracture model is built. The tectonic seam corrosion and structures have important impact on the development of karst reservoir. The large solution cavities developed along the fractures, and paleocave density reaches maximum about 300 m away from the fractures.

 

Key words: Tarim Basin; Ordivician; fracture; fault system; Paleokarst reservoir; stylolite

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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