碳酸盐岩构造裂缝特征与形成期次分析:以阿姆河盆地右岸东部为例  

Analysis of Structural Fracture Characteristics and Formation Stages of Carbonate Rocks:A Case Study from the Eastern Right Bank of the Amu Darya Basin

作　　者：侯筱晓 刘成林[1,2] 陈茜[1,2] 梁丛丛 彭博 张莉莉[4] 孙利国 HOU Xiao-xiao;LIU Cheng-lin;CHEN Qian;LIANG Cong-cong;PENG Bo;ZHANG Li-li;SUN Li-guo(State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum(Beijing),Beijing 102249,China;College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China;Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China;International Business Division,China Petroleum Logging Co.,Ltd.,Beijing 102200,China)

机构地区：[1]中国石油大学(北京)油气资源与探测国家重点实验室,北京102249 [2]中国石油大学(北京)地球科学学院,北京102249 [3]中国地质科学院地质力学研究所,北京100081 [4]中国石油集团测井有限公司国际事业部,北京102200

出　　处：《科学技术与工程》2024年第7期2673-2682,共10页Science Technology and Engineering

基　　金：国家自然科学基金(41872127);国家重点研发计划(2021YFA0719000)。

摘　　要：碳酸盐岩裂缝对石油和天然气勘探开发具有重要意义,但碳酸盐岩构造裂缝特征描述、形成和影响因素一直是油气储层研究的重点。综合利用岩心、测井解释和分析测试等资料,对阿姆河盆地右岸东部地区侏罗系卡洛夫-牛津阶碳酸盐岩储层内构造裂缝特征进行研究,划分构造裂缝类型及发育期次,明确影响构造裂缝发育的影响因素,分析多期次裂缝对天然气聚集的影响。结果表明:(1)构造裂缝是阿姆河盆地右岸东部侏罗系卡洛夫-牛津阶储层中发育的主要裂缝类型,按照产状分为水平缝、低角度缝、高角度缝和垂直缝;卡洛夫-牛津阶储层构造裂缝总体上走向以NW-SE向为主,但不同裂缝的走向差异性较大,反映了裂缝具有多期发育的特点,不同类型的构造裂缝在产状、密度和规模存在差异,中下侏罗统的XVa1层中最发育,平均裂缝密度为1.48条/m;构造裂缝的规模普遍较大,在上侏罗统的XVhp层裂缝宽度和裂缝高度最大,平均裂缝宽度约0.08 mm、平均裂缝高度67.1 cm,构造裂缝的倾角多介于40°~70°;(2)阿姆河盆地右岸东部侏罗系卡洛夫-牛津阶储层构造裂缝的发育程度存在较大的差异,这是由于裂缝的发育不仅受到岩性的控制,还受到多期构造运动的影响,亮晶砂屑灰岩和生物礁灰岩为构造裂缝发育的优势岩性;新近纪的挤压作用强烈,在侏罗系卡洛夫-牛津阶岩心中形成相互交错的网状裂缝,为裂缝期次划分提供有利证据;(3)阿姆河盆地右岸东部侏罗系卡洛夫-牛津阶中构造裂缝形成于燕山晚期到喜山中期,其中晚期裂缝的形成不仅改善了储层物性,也促进天然气聚集和成藏。Carbonate fractures are of great significance to the exploration and development of oil and gas,but the description,formation and influencing factors of carbonate structural fractures have always been the focus of oil and gas reservoir research.Based on the data of core,logging interpretation and analysis of test data,the characteristics of structural fractures in the Jurassic Callovian-Oxfordian carbonate reservoirs in the eastern part of the right bank of the Amu Darya Basin were studied.The types and development stages of structural fractures were divided,the influencing factors affecting the development of structural fractures were clarified,and the influence of multi-stage fractures on natural gas accumulation was analyzed.The results show these as follows.Structural fractures are the main types of fractures developed in the Jurassic Callovian-Oxfordian reservoirs on the eastern right bank of the Amu Darya Basin.According to the occurrence,the structural fractures are divided into horizontal fractures,low-angle fractures,high-angle fractures and vertical fractures.In general,the structural fractures of the Callovian-Oxfordian reservoir are mainly NW-SE trending,but the strikes of different fractures are quite different,reflecting the characteristics of multi-stage development of fractures.There are differences in the occurrence,density and scale of different types of structural fractures.The middle and lower Jurassic XVa1 layer is the most developed,with an average fracture density of 1.48/m.The scale of structural fractures is generally large.The fracture width and fracture height are the largest in the XVhp layer of the Upper Jurassic,with an average fracture width of about 0.08 mm and an average fracture height of 67.1 cm.The dip angle of structural fractures is mostly between 40°and 70°.There are great differences in the development degree of structural fractures in the Jurassic Callovian-Oxfordian reservoirs in the eastern right bank of the Amu Darya Basin.The development of fractures is not only cont

关 键 词：阿姆河盆地 构造裂缝 期次分析 天然气聚集 

分 类 号：TE122.2[石油与天然气工程—油气勘探]