塔里木盆地雅克拉地区古近系低幅构造圈闭落实及有利目标评价  

Exploration of Paleogene Low-amplitude Structure Traps and Evaluation of Favorable Targets in the Yakela Area of the Tarim Basin

作　　者：费娥 李涛[1] 周吉春 孙致远 张珈畅 岳彤 FEI E;LI Tao;ZHOU Ji-chun;SUN Zhi-yuan;ZHANG Jia-chang;YUE Tong(School of Geosciences,Yangtze University,Wuhan 430100,China;Sinopec Northwest China Petroleum Bureau,Urumqi 841100,China)

机构地区：[1]长江大学地球科学学院,武汉430100 [2]中国石化西北油田分公司,乌鲁木齐841100

出　　处：《科学技术与工程》2025年第3期912-923,共12页Science Technology and Engineering

基　　金：中石化科研攻关项目(KY2021-S)。

摘　　要：雅克拉地区位于塔里木盆地北部。2021年老井复查显示,雅克拉YK6H区块古近系库姆格列木组新增石油探明地质储量86.70×10^(4)t,目前已发现的油气藏构造幅度低,相似低幅构造圈闭识别难度大,且成藏条件的匹配关系不明确。为寻找新的油气开发有利区带、加强剩余油藏的开发,以雅克拉地区高精度三维地震资料为基础,以高分辨率层序地层学理论为指导,对雅克拉地区开展了高精度地层划分与对比分析;通过层位自动追踪、多级嵌套断裂解释技术、变速成图技术,识别了105条微断裂,提高了低幅度构造的识别精度,落实了最小闭合高度为2 m的低幅构造圈闭的分布;通过构造位置、圈闭特征、沉积储层及油气运移通道等控藏要素,对新落实的低幅度构造圈闭进行分析评价,通过类比评价法,对新落实的构造圈闭进行了有利目标优选,并综合分析得到该区的有利成藏区带。总结了适用于低幅构造圈闭的构造圈闭-储层特征-运聚成藏三元素匹配控制成藏目标的“三元控藏”有利目标优选方法,可为相似地质条件地区的有利目标评价提供借鉴。The Yakela region is located in the northern part of the Tarim Basin.The review of old wells in 2021 shows that the new proven geological reserves of oil in the Paleogene Kumugeliemu Formation in the YK6H block of Yakela are 86.7×10^(4) t,and the struc-tural amplitude of the oil and gas reservoirs that have been discovered so far is low,and it is difficult to identify similar low-amplitude structural traps,and the matching relationship between the accumulation conditions is not clear.In order to find new favorable zones for oil and gas development and strengthen the development of remaining oil reservoirs,based on the high-precision 3D seismic data of the Yakela area and guided by the theory of high-precision sequence stratigraphy,the high-precision stratigraphic division and comparative analysis of the Yakela area were carried out.Through ant body extraction,automatic layer tracking,and variable velocity mapping technology,105 micro-faults were identified,the identification accuracy of low-amplitude structures was improved,and the distribution of low-amplitude structural traps with a minimum closure height of 2 meters was implemented.Based on the reservoir control factors such as structural location,trap characteristics,sedimentary reservoirs and oil and gas migration channels,the newly implemented low-amplitude structural traps were analyzed and evaluated,and favorable targets were selected,and then the favorable reservoir zones were comprehensively analyzed.The“three-element reservoir control”favorable target optimization method suitable for low-amplitude struc-tural traps was summarizes,which is suitable for low-amplitude structural traps,and provides a reference for the evaluation of favorable targets in areas with similar geological conditions.

关 键 词：雅克拉 构造解释 圈闭特征 成藏分析 圈闭评价 

分 类 号：P618[天文地球—矿床学]