塔里木盆地三道桥北地区古近系-白垩系油气成藏模式  

Paleogene-Cretaceous hydrocarbon accumulation model in the northern Sandaoqiao area of Tarim Basin

作　　者：李涛[1] 佟伟桀 胡忠贵[1] 丁辉[2] 梁利侠[2] LI Tao;TONG Weijie;HU Zhonggui;DING Hui;LIANG Lixia(School of Geosciences,Yangtze University,Wuhan 430100,Hubei;Northwest Oilfield Company,SINOPEC,Urumqi 830011,Xinjiang)

机构地区：[1]长江大学地球科学学院,湖北武汉430100 [2]中国石化西北油田分公司,新疆乌鲁木齐830011

出　　处：《长江大学学报（自然科学版）》2023年第6期1-12,共12页Journal of Yangtze University(Natural Science Edition)

基　　金：国家科技重大专项“重点海相层系沉积相研究”(2016ZX05007002)。

摘　　要：为了明确三道桥北地区古近系白垩系的勘探方向,应用油气成藏综合分析评价理论,利用地震资料解释和岩心录井等资料,研究了其构造、地层和储层发育等特征,探讨了油气成藏要素,并分析了其控制作用,进而建立了成藏模式。三道桥北地区结构受海西、印支、燕山、喜山等多期构造运动控制,形成不整合和断层控制的复合构造圈闭;北部库车凹陷陆相油源沿断层和不整合形成的运移路径将油气运移至白垩系古近系复合构造圈闭中聚集成藏;其中断裂控制了油气藏的空间展布区带,而不整合是油气远距离运移的重要横向运移通道,古近系膏盐岩、泥岩是油气运聚成藏的重要盖层。综合成藏要素及其控制作用建立了三道桥北地区的“横向运移,垂向调整,三元控藏,构造控富”的油气成藏模式,预测三道桥北地区断控复合构造圈闭是下一步勘探的有利方向。In order to clarify the exploration direction of the Paleocene-Cretaceous in the northern Sandaoqiao area,the comprehensive analysis and evaluation theory of oil and gas accumulation was applied to study the characteristics of its tectonic,stratigraphic and reservoir development using seismic data interpretation and core logging,and to explore the elements of oil and gas formation and analyze their controlling effects,and then to establish the accumulation model.The structure of the northern Sandaoqiao area is controlled by the multi-phase tectonic movements of Haixi,Indo-Chinese,Yanshan and Xishan,forming a composite tectonic trap controlled by unconformity and faults;the onshore oil source of the northern Kuche Sag follows the transport path formed by faults and unconformity to accumulate oil and gas in the Cretaceous-Paleocene composite tectonic trap;among them,fractures control the spatial distribution zone of oil and gas reservoirs,while unconformity is an important long-distance transport channel for oil and gas.The unconformity is an important lateral transport channel for long-distance transport of hydrocarbons,and the Paleoproterozoic plutonic rocks and mudstones are important cover layers for oil and gas transport and accumulation.The hydrocarbon accumulation model of“lateral transport,vertical adjustment,ternary reservoir control,and tectonic control”in the northern Sandaoqiao area is established based on the combination of reservoir accumulation factors and their controlling effects.It is predicted that the fault-controlled composite structural trap in the northern Sandaoqiao area is a favorable direction for further exploration.

关 键 词：三道桥北 古近系白垩系 构造圈闭 成藏模式 

分 类 号：TE122[石油与天然气工程—油气勘探] P618.3[天文地球—矿床学]