摘要
走滑作用是含油气盆地中普遍存在的构造作用之一,系统开展走滑作用对构造裂缝发育特征的影响研究,对于构造裂缝的分布预测有着重要意义。以塔里木盆地库车坳陷克拉苏构造带博孜1、克深5和克深13气藏为例,综合岩心、成像测井和钻井漏失量等资料,系统分析了走滑作用存在下的构造裂缝的特征与分布,并讨论了走滑作用及其对构造裂缝影响的可能动力学机制。结果表明:博孜1、克深5及克深13气藏均发育左旋走滑作用,使构造裂缝参数的分布与构造形态的对应性变差,但构造裂缝参数的变化规律与走滑作用方向之间并非简单的对应关系,其定量力学机制尚有待深入研究。对于挤压构造区的背斜型气藏,当走滑作用存在时,井位部署不宜直接采用背斜构造的裂缝发育模式确定裂缝发育区,需要根据实际地质资料进行综合判断。
Strike-slipping is a prevalent tectonic process in petroliferous basins.A systematical research on the effect of strike-slipping on tectonic fractures is significant to the prediction of tectonic fractures.Taking the Bozi-1,Keshen-5 and Keshen-13 gas reservoirs in the Kelasu structural belt of Kuqa Depression as examples,the characteristics and contribution of tectonic fractures in the presence of strike-slipping effect were analyzed using cores,image logging and drilling fluid leakage.At last,a probable dynamics mechanism of strike-slipping was discussed.The Bozi-1,Keshen-5 and Keshen-13 gas reservoirs all develop sinistral strike-slipping,which leads to the weakening of relationship between the distribution of tectonic fractures and the structural form,but the variation of tectonic fractures is not simply corresponding to the direction of strike-slipping,and the quantitative mechanical mechanism has yet to be deeply researched.To anticlinal gas reservoir in compressional tectonic region,the universal fracture development mode of anticline is not suitable for the determination of fracture development areas and the deployment of drilling wells when strike-slipping exists,while some correction should be made using actual geological data.
作者
王珂
张荣虎
赵继龙
王俊鹏
曾庆鲁
黄箐璇
张知源
周露
WANG Ke;ZHANG Ronghu;ZHAO Jilong;WANG Junpeng;ZENG Qinglu;HUANG Qingxuan;ZHANG Zhiyuan;ZHOU Lu(PetroChina Hangzhou Research Institute of Geology,Hangzhou 310023,China;PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China;Research Institute of Exploration&Development,PetroChina Tarim Oilfield Company,Korla 841000,China)
出处
《天然气地球科学》
CAS
CSCD
北大核心
2023年第8期1316-1327,共12页
Natural Gas Geoscience
基金
国家自然科学基金企业创新发展联合基金集成项目“环青藏高原盆山体系动力学与天然气富集机理”(编号:U22B600002)
中国石油“十四五”上游领域前瞻性基础性课题“前陆冲断带下组合规模储层形成机理与有效性评价技术研究”(编号:2021DJ0302)联合资助.
关键词
走滑作用
构造裂缝
动力学机制
克拉苏构造带
库车坳陷
Strike-slipping
Tectonic fracture
Dynamics mechanism
Kelasu structural belt
Kuqa Depression
作者简介
王珂(1987-),男,山东郓城人,博士,高级工程师,主要从事碎屑岩储层地质研究.E-mail:wangk_hz@petrochina.com.cn.
