哈山地区断裂网络体系拓扑结构及分形特征  

The topological structure and fractal characteristics of the fracture network system in the Halaalat Mountain

作　　者：王迪 王兴平 于亚洲 李明尚 李伟[3] Wang Di;Wang Xingping;Yu Yazhou;Li Mingshang;Li Wei(School of Geology and Mining Engineering,Xinjiang University,Ürümqi 830046;Xinjiang Key Laboratory of Continental Dynamics and Metallogenic Prediction of Central Asian Orogenic Belt,Ürümqi 830046;School of Earth Science and Technology,China University of Petroleum(East China),Qingdao,Shandong 266580)

机构地区：[1]新疆大学地质与矿业工程学院,乌鲁木齐830046 [2]新疆中亚造山带大陆动力学与成矿预测自治区重点实验室,乌鲁木齐830046 [3]中国石油大学(华东)地球科学与技术学院,山东青岛266580

出　　处：《地质科学》2025年第2期415-427,共13页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：新疆维吾尔自治区自然科学基金项目(编号:2022D01C659);国家自然科学基金面上项目(编号:42072169);新疆维吾基金项目:尔自治区“天池英才”引进计划项目资助。

摘　　要：以准噶尔盆地西北缘哈拉阿拉特山(哈山)地区为研究对象,在对不同层系断裂精细解析的基础上,对断裂网络体系的拓扑参数(节点、分支类型)统计及分维值计算,定量表征了研究区不同层系断裂网络体系的拓扑结构及分形特征,结合研究区油气分布特征进行了探讨。结果表明:研究区断裂以NE、NEE(近EW向)为主;不同层系断裂体系的拓扑结构具有差异性,P1时期I型节点占比为4个时期中最少,Y型节点占比为4个时期最多,I-I分支、I-C分支和C-C分支占比较为平均。P2时期I型节点占比最高,Y型节点数量较少,连接节点数量最高为138,I-I分支占比多,I-C分支占比适中,C-C分支占比较少。T时期I型节点最多,Y型节点数量较少,I-I分支占比高,I-C占比次之,C-C分支占比最低。J—K时期I型节点占比最多,Y型节点占比较少,I-I分支占比最多,I-C分支和C-C分支占比较少。由深到浅I型节点占比先增多后减少,I-C分支、C-C分支的比例先减少后增大,连通性由好变差,再变好;不同层系断裂体系由深至浅分维值高值先变高后减少,断裂体系先复杂后变简单,分维高值区沿NE向主干断裂分布。结合研究区油藏分布特征发现,断裂体系的拓扑结构、分形特征与与油气藏分布具有良好的耦合关系,高拓扑值与高分维值的叠合区是油气成藏的有利区。Taking the Halaalat Mountain of the northwest margin of the Junggar Basin as the research object,on the basis of the fine analysis of the faults of different strata,the topological parameters(nodes and branch types)of the fault network system and the calculation of fractal dimension values were carried out to quantitatively characterize the topological structure and fractal characteristics of the fault network system in the study area,and the distribution characteristics of oil and gas in the study area were discussed.The results show that the faults in the study area are mainly NE and NEE near EW.The topology of different strata fault systems is different,and the proportion of I nodes in the P1 period is the lowest among the four periods,the proportion of Y nodes is the highest among the four periods,and the proportion of I‑I branches,I‑C branches and C‑C branches is more even.In the P2 period,the proportion of I nodes was the highest,the number of Y‑type nodes was small,and the number of connected nodes reached the highest of 138,with the proportion of I‑I branches being more,the proportion of I‑C branches being moderate,and the proportion of C‑C branches being small.In the T period,I nodes are the most numerous,and the number of Y nodes is smaller.The I‑I branch has a high proportion,followed by the I‑C branch,and the C‑C branch has the lowest proportion.In the J—K period,the proportion of I nodes is the largest,the proportion of Y nodes is less,the proportion of I‑I branches is the largest,and the proportion of I‑C and C‑C branches is less.From deep to shallow,the proportion of I‑nodes first increased and then decreased,the proportion of I‑C and C‑C branches decreased first and then increased,and the connectivity changed from good to poor and then better.The fractal dimension of different strata of the fault system first increases and then decreases,and the fault system becomes complex first and then simple,and the fractal dimension high value area is distributed along the NE

关 键 词：断裂网络体系 拓扑结构 分形特征 油气分布 哈山地区 

分 类 号：P542[天文地球—构造地质学] TE121[天文地球—地质学]