川西北前陆双鱼石地区砂箱物理模拟及其油气地质意义  

Analogue experiments for the Shuangyushi area in the north western Sichuan Foreland Basin and their implications

作　　者：张连进 黄家强[2] 罗强 何宇[3] 于豪[2] 杨荣军[2] 梁霄[3] 周政[3] 邓宾 Zhang Lianjin;Huang Jiaqiang;Luo Qiang;He Yu;Yu Hao;Yang Rongjun;Liang Xiao;Zhou Zheng;Deng Bin(Research Institute of Petroleum Exploration and Development,Xinan Oilfield,PetroChina,Chengdu 610094,China;PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu 610059,China;Tarim Oilfield Company,PetroChina,Korla Xinjiang 841000,China)

机构地区：[1]中国石油西南油气田勘探开发研究院,成都610094 [2]中国石油勘探开发研究院,北京100083 [3]成都理工大学油气藏地质及开发工程国家重点实验室,成都610059 [4]中国石油塔里木油田分公司,新疆库尔勒841000

出　　处：《地质科技通报》2021年第2期156-166,共11页Bulletin of Geological Science and Technology

基　　金：国家科技重大专项(2017ZX05026-005)。

摘　　要：基于川西北前陆双鱼石地区地震构造解释和砂箱物理模拟实验等,揭示川西北前陆盆地构造变形特征、过程与形成演化机制。标准模型、标准地层模型和断坪-断坡结构模型物理模拟实验揭示出川西北双鱼石地区具有双重构造扩展变形特征,受底部滑脱层系和断坡结构带联合控制,其深部物质变形形成典型冲起构造。断坡结构带对上覆下古生界构造变形及其断裂发育具有重要控制作用,部分断裂体系易于形成高效的下寒武统筇竹寺组源岩-古生界储层“源-储”输导体系。前陆扩展变形带逆断层与相关冲起构造易于形成深部隐伏的双重构造,前陆盆地隐伏构造由新生代晚期构造扩展变形形成,但其构造变形相对较弱,因而具有较佳的晚期油气保存富集条件。“自然界原型到实验模型”的砂箱物理模拟为解译前陆盆地演化过程及其油气富集等提供了独立有效的手段。In this study,we conducted three sets of analouge experiments,i.e.,the pilot experiment with homogeneous quartz sand with frontal ramp,scaled experiments with embedded layer of silicone and/or frontal ramp,for the Shuangyushi area in the north western Sichuan Foreland Basin.It suggests that the north western Sichuan Foreland Basin is dominated with two-layer style of deformation,in particular,with pop-up in deep strata which is controlled by the basal decollement and frontal ramp.It should be noted that the frontal ramp has significant influence on the undistributed deformation and related fault-style occurred at the overlying sequences,which are in favor of formation for a pathway system between Lower Cambrian Qiongzhushi Formation and Mesozoic carbonate/dolomite reservoir.In contrast to duplex as a result of multistage deformation in the thrust-and-fold-belt,the north western Sichuan Foreland Basin is characterized with gentle deformation,as a result of forelandward propagation deformation in Cenozoic,and thus with a better quality of hydrocarbon preservation.Analogue experiments have been a powerful and indispensable tool to help us understand the thrust-fold-belt and foreland basin,as well as their hydrocarbon accumulation,from nature to models.

关 键 词：砂箱物理模拟 断坡结构 双鱼石地区 川西北前陆盆地 

分 类 号：P554[天文地球—构造地质学]