2016年12月，第22卷，第4期，644-656页
Dec 2016,Vol.22,No.4，pp.644656 DOI: 10.16108/j.issn10067493.2015255
高校地质学报
Geological Journal of China Universities
库车陷构造裂缝发育特征及分布规律
于璇，侯贵廷，能源”，李杰，魏红兴
1.教育部造山带与地壳演化重点实验室，北京大学地球与空间科学学院，北京100871：
2.中国石油塔里本油田分公司勘探开发研究院，库尔勒841000
摘要：通过对野外露头和井下岩心构造裂缝的观察和描述，及其性质、产状、密度、强度、开度、充填程度和充填物等测量要素的观测和统计，对库车前陆冲断带山前构造裂缝发育特征及分布规律进行了综合分析。该区主要发育三组近南北走向的剪裂缝和张剪裂缝，裂缝倾角总体以大于45°的高角度缝和重直缝为主，野外和岩心裂缝开度分别以0-5mm和0-1mm 为主，裂缝多未充填或半充填，充填物以钙质充填为主。裂缝各参数的分布呈现出东西分段，南北分带的特点，以克拉苏一依奇克里克构造带的裂缝密度和强度最高。具体到层位上，库车东部以下保罗统阿合组裂缝最为发育，库车西部则以下白垩统巴什基齐克组砂岩的裂缝密度最高。总体上，库车坳陷构造裂缝十分发育，有益于致密储层孔渗条件的改善，有利于裂缝型油气藏的形成。
关键词：构造裂缝；发育特征；分布规律；库车坳陷
中图分类号：P548
文献标识码：A
文章编号：10067493（2016）040644-13
Development andDistributionCharacteristics of TectonicFractures
inKuqaDepression
YU Xuan', HOU Guiting'*, NENG Yuan", LI Jie', WEI Hongxing"
1. Key Laboratory of Orogenic Belt and Crustal Evolution, Sechool of Earth and Space Sciences, Peking University, Beijing 100871, China;
2. Research Institute of Exploration and Development, Tarim Oilfield Company, PetroChina, Korla 841000, China
Abstract: The structural fracture development characteristies of Kuqa depression in Tarim Basin are comprehensively analyzed in light of the outerop, core and log data. The characteristics of fractures we overserved consist of properties, attitude, density, intensity, aperture, and flling, The tectonic fractures in this area are mainly the medium-high dip angle shear fractures and include three groups of fractures extending mostly in the NS direction. The aperture of most outerop and core fractures is O5mm and 01mm, respectively. The majority of fractures is unfilled or half-filled, and the filling is mainly calcite. The distribution of each parameter of fracture shows regularity in EW and NS direction, respectively. Laterally, the Lower Cretaceous fracture development area is mainly distributed in the KelasuYiqikelike structural belt. Vertically, the fractures are well developed in the Lower Jurassic Ahe Formation in the east Kuqa depression, and the Lower Cretaceous Bashijiqike Formation in the west Kuqa depression. Overall, the structural fracture is very well developed in the Kuche depression, which is beneficial to the improvement of porosity and permeability of tight reservoir, and is also beneficial to the formation of fractured hydrocarbon reservoirs.
Key words: tectonic fractures; development characteristics; distribution regularity; Kuqa depression
Corresponding author: HOU Guiting, Professor; E-mail: gthou@pku.edu.cn 收稿日期：2015-1231；修回日期：20160823
基金项目：中石油塔里本油田分公司项目（041013110025）；中石油重大专项谋题（2014A0213）联合资助作者简介：于瑕，男。1990年生，博士研究生，构造地质学专业；E-mail:pkuyuxuan@pka.edu.en
*通讯作者：侯费廷，男，教授，博土生导师，长期从事构造地学和石油地质学的教学和科研；E-mail:gthou@pku.edu.c