哈萨克斯坦南图尔盖盆地Doshan斜坡带岩性油气藏储层预测方法  

Prediction method for lithologic reservoirs in Doshan slope zone of South Turgai Basin,Kazakhstan

作　　者：何文渊 陈可洋[2] HE Wenyuan;CHEN Keyang(China National Oil and Gas Exploration and Development Corporation,Beijing 100034,China;Research Institute of Exploration and Development,PetroChina Daqing Oilfield Co.,Ltd.,Daqing 163712,Heilongjiang,China)

机构地区：[1]中国石油国际勘探开发有限公司,北京100034 [2]中国石油大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《岩性油气藏》2024年第4期1-11,共11页Lithologic Reservoirs

基　　金：中油国际项目“2018年海外探区规划计划研究与勘探动态跟踪分析”(编号:2018-ZC-01-02)资助。

摘　　要：综合利用钻井、测井、地震等资料,分析了哈萨克斯坦南图尔盖盆地Doshan区块中部斜坡带沉积特征,并提出了一种岩性油气藏储层预测方法,识别出岩性圈闭,地震属性分析验证了储层预测结果的可靠性。研究结果表明:(1)哈萨克斯坦南图尔盖盆地Doshan斜坡带中—下侏罗统沉积时构造活动强烈,发育少量断裂,以湖相沉积为主,可分为SQ4—SQ6共3个沉积期,分别对应埃巴林组(J_(1)ab)、多尚组(J_(2)ds)和卡拉甘塞组(J_(2)kr),SQ6时期发生大规模湖侵,扇三角洲呈裙带状展布在边缘断层一侧,半深湖范围扩大;三角洲前缘为岩性圈闭发育的有利相带。(2)储层预测方法为以井-震标定结果确定地层界线,以基于声波曲线重构的岩石物理分析校正井径的影响,以基于调谐厚度的正演模型分析识别砂体,以高分辨率岩性储层地震反演技术对单砂层进行识别。(3)研究区岩性圈闭主要分布于中—下侏罗统,发育于坡折控砂条件下的一系列构造带上。地震属性分析结果与沉积特征吻合度较高。(4)研究区中—下侏罗统的坡折位置发育一系列岩性圈闭,在高分辨率地震剖面上表现为强振幅、高阻抗特征,是勘探有利区。By comprehensively utilizing drilling,logging and seismic data,the sedimentary characteristics of the central slope zone in the Doshan block of the South Turgai Basin in Kazakhstan were analyzed,and a method for predicting lithologic reservoirs was proposed.The lithologic traps were identified,and their prediction results were verified through seismic attributes.The results show that:(1)During the sedimentation of the Middle-Lower Jurassic in Doshan slope zone of South Turgai Basin in Kazakhstan,there were strong tectonic activities,with a small number of faults developed,mainly lacustrine sedimentation.It can be divided into three sedimentary periods:SQ4-SQ6,corresponding to the Ebalin Formation(J_(1)ab),Doshan Formation(J_(2)ds),and Karagansai Formation(J_(2)kr),respectively.During the SQ6 period,large-scale lake intrusion occurred,and the fan delta was distributed in a skirt like pattern on one side of the edge fault,and the semi-deep lake area expanded.The delta front is a favorable facies zone for the development of lithologic traps.(2)The reservoir prediction method is to determine the formation boundary based on well seismic calibration results,correct the influence of wellbore dia-meter through rock physics analysis based on acoustic curve reconstruction,identify sand bodies through forward modeling based on tuning thickness,and identify single sand layers through high-resolution lithologic reservoir seismic inversion technology.(3)The lithologic traps in the study area are mainly distributed in the Middle to Lower Jurassic,which are developed on a series of structural belts with slope break controlled sand.The seismic attribute analysis results have a high degree of agreement with sedimentary characteristics.(4)A series of lithologic traps are developed in the slope break of Middle-Lower Jurassic in the study area,which exhibit strong amplitude and high impedance characteristics on high-resolution seismic sections,making it a favorable exploration area.

关 键 词：斜坡带 岩性圈闭 储层预测 圈闭识别 正演模拟 地震反演技术 岩石物理 声波曲线重构 中—下侏罗统 Doshan区块 南图尔盖盆地 哈萨克斯坦 

分 类 号：TE122[石油与天然气工程—油气勘探] P618.13[天文地球—矿床学]