摘要
为了研究洛阳-济源盆地构造特征及其与油气关系,系统收集、整理了研究区已有的重力和磁力资料,结合地震、地质、钻井等研究成果,分析了研究区重力场和磁力场特征及成因,推断了研究区断裂构造体系,探讨了断裂构造分布与油气之间的关系,预测了研究区油气有利区。研究结果表明,洛阳-济源盆地内重力低是由中生界-新生界引起,重力高是由前新生界或前震旦系基底隆起引起;盆地内发育的断裂按走向主要有近东西(包括东西、北东东、北西西)向、北东(包括北北东)向和北西(包括北北西)向3组断裂,其中以近东西向和北东向这2组断裂最为发育。断裂构造基本控制了研究区地层的展布,断裂不仅为油气运移、聚集提供通道及原动力,而且改善了上三叠统储集层的储集性能,同时可为油气的成藏提供良好圈闭条件。研究区有3个油气有利区、2个油气较有利区。
In order to study the structural features and the relationship of fault structures and oilgas in LuoYang-JiYuan Basin,this paper systematically collected and neatened the gravity and magnetic measurement data in the study area.Based on the collected data and the seismic,geology and drilling results in the study area,the paper analyses the characteristics and causes of gravity and magnetic anomaly,the fault structures and the relationship between distribution of fault structures and oilgas to predict the favorable areas for oilgas.The research results show that the low gravity is caused by the Mesozoic-Cenozoic strata,and the high gravity is caused by Pre-Cenozoic strata or Pre-Sinian system basement uplift in LuoyangJiyuan Basin.The main faults developed in the basin fall into 3groups,respectively according to their direction：nearly EW（including EW,NEE,NWW）,NE（including NNE）and NW（NNW）,of which the first 2groups are developed best.Fault structures basically controll the distribution characteristics of strata and structural framework and the boundaries of tectonic units in the study area.The faults not only provide the motive power and the channels for oilgas migration and accumulation,and improve the reservoir property of Triassic reservoir,and also can provide good trap conditions for oil and gas accumulation.Based on various analyses 3favorable areas for oil gas and 2poor favorable areas for oil gas are separated in the study area.
出处
《地质科技情报》
CAS
CSCD
北大核心
2017年第1期106-116,共11页
Geological Science and Technology Information
基金
陕西省教育厅专项科研计划项目(14KJ1579)
西安石油大学研究生创新基金项目(2014cx130220)
陕西省教育厅专项科研计划项目(2013JK0845)
关键词
洛阳-济源盆地
重磁力场
断裂构造
油气有利区
Luoyang-Jiyuan Basin
gravity ＆ magnetic field
fault structure
favorable areas for oil ＆gas
