榆林—神木地区CO_(2)咸水层封存甜点优选  

Sweet spot selection in CO_(2)saline aquifers geological storage,Yulin-Shenmu Area

作　　者：张小莉[1] 李亚军 冯淳 王姝慧 罗广惠 李晨阳 ZHANG Xiaoli;LI Yajun;FENG Chun;WANG Shuhui;LUO Guanghui;LI Chenyang(Department of Geology,Carbon Neutrality College(Yulin),National&Local Joint Engineering Research Center of Carbon Capture and Sequestration Technology,Shaanxi Key Laboratory for Carbon Neutral Technology,Northwest University,Xi’an 710069,China;School of Petroleum Engineering and Environmental Engineering,Yan’an University,Yan’an 716000,China)

机构地区：[1]西北大学地质学系/榆林碳中和学院/二氧化碳捕集与封存国家地方联合工程研究中心/陕西省碳中和技术重点实验室,陕西西安710069 [2]延安大学石油工程与环境工程学院,陕西延安716000

出　　处：《西北大学学报（自然科学版）》2023年第6期900-912,共13页Journal of Northwest University（Natural Science Edition）

基　　金：陕西省自然科学基础研究计划项目(2022JC-DW-09)。

摘　　要：融合区域重力、磁法、电法、遥感、地震资料和测井资料,分析地层构造特征及可能存在的断裂;对远离断层的区域,基于钻井、录井、测井资料综合分析,通过精细岩性识别、储层物性、盖层特征分析,厘清钻井中优质储层、盖层组合特征及展布;结合CO_(2)可注入性实验模拟结果,形成CO_(2)咸水层封存甜点优选技术序列,从而达到优选CO_(2)咸水层封存潜力甜点的目的。研究表明,榆林和神木地区的纸坊组3段、神木及其附近的石千峰组千5段、榆林北部和西北部的延长组长10底部的砂体发育,物性较好,优质储层发育,储盖组合优,远离断层,砂体埋藏深度分别为750~1500 m,1500~2100 m,850~1350 m。研究后认为,纸3段、千5段优质储层发育区为CO_(2)咸水层封存甜点分布有利潜力区,榆林北部和西北部的长10底部优质储层发育区为CO_(2)咸水层封存甜点潜力接替区;和尚沟组、刘家沟组砂体相对不发育,主要为泥质地层,起到良好区域封盖作用。Comprehensive analysis of the structural characteristics and the possible faults by integrating gravity,magnetic,electrical,and remote sensing data;for areas far away from faults,based on comprehensive analysis of drilling and logging data,fine lithology identification,reservoir physical properties and cap rock characteristics is used to clarify the characteristics of high quality reservoirs-cap rock combinations and spatial distribution;based on the simulation results of CO_(2)injectability experiments,a sequence of optimization techniques about the site selection for the CO_(2)geological storage of sweet spots is formed.Thus,the goal to optimize the site for CO_(2)geological storage of sweet spots in the saline aquifers is achieved.Research shows,the third member of the Zhifang Formation,the 5th member of the Shiqianfeng Formation in the area of Shenmu and the Chang 10 Member of Yangchang Formation in the northern and northwestern regions of Yulin have well-developed sand bodies with good physical properties,excellent caprock and lateral shielding conditions,far away from the faults,with burial depth of 750~1500 m,1500~2100 m,and 850~1350 m.Research suggests that the development area of high-quality reservoirs in the third member of the Zhifang Formation and the 5th member of the Shiqianfeng Formation are the favorable potential sweet spot distribution areas for the CO_(2)geological storage in the saline aquifers,and the development area of high-quality reservoirs at the bottom of Chang10 in the northern and northwestern regions of Yulin is a potential replacement sweet spot distribution area for the CO_(2)geological storage in the saline aquifers;in the study area,the sand bodies of the Heshanggou Formation and Liujiagou Formation are relatively underdeveloped and mainly composed of mud strata,which play a good sealing role.

关 键 词：咸水层 二氧化碳地质封存 测井 储盖组合 甜点 选址 

分 类 号：X14[环境科学与工程—环境科学] X196[天文地球—矿床学] P618.130.2[天文地球—地质学]