摘要
在全面剖析济阳坳陷惠民凹陷第三纪火成岩空间分布规律的基础上 ,对本区火山岩的成藏机理进行了深入研究 ,总结了惠民凹陷火山岩型油气藏的成藏模式。惠民凹陷的主要烃源岩来自于南部的临南洼陷和北部的滋镇洼陷 ,由于本区火成岩主要沿 2个生烃凹陷间隆起带的临邑帚状断裂带展布 ,保证了火山岩带有充足的油源条件。油气运移的输导体系是由渗透性砂岩、断层、裂缝和不整合面的三维空间组合 ,研究区的临邑帚状断裂带、多期发育的裂缝和不整合面对油气向火山岩储层的运移至关重要。储集空间是储层质量好坏的决定因素 ,惠民凹陷的火山岩储层存在各种的原生储集空间 ,同时由于次生的断层活动和火成岩拱张作用形成了丰富的次生储集空间 ,极大地改善了本区火成岩的储层物性 ,是本区形成各类火成岩圈闭和油藏的保证。本区火成岩存在 3种类型的油气藏 ,即火成岩作为储层。
On the basis of analyzing the Tertiary igneous rocks in Jiyang depression and Huimin depression, the bed forming mechanism of igneous rocks in this area was studied, and a bed forming model was proposed for igneous rock type oil and gas bed of Huiming depression. The Huimin hydrocarbon-source rocks mainly originated from southern Linlan trap in the south and the Zizhen trap in the north, because the igneous rocks in this area are distributed dominantly along the broom-shaped fault zone between the uplifted zones of two hydrocarbon producing depressions, which guarantees sufficient oil source conditions in the igneous rock zone. The oil and gas migration system consists of a three-dimensional spatial combination of infiltrative sandstone, fault, crack and discordant boundary, and the broom-shaped fault zone, multiphase crack and discordant boundary are very important for oil and gas migration towards igneous rocks. Reservoir space is a determining factor for the quality of reservoir bed. The igneous reservoir bed of Huiming depression has various types of reservoir spaces, and meanwhile, secondary fault activities and igneous rock arching and extension result in abundant secondary reservoir spaces, which greatly improves the characteristics of the reservoir beds in igneous rocks in the study area and serves to guarantee the formation of various types of igneous rock traps and oil reservoirs in this area. Three types of oil and gas reservoirs, involving igneous rock reservoir bed, igneous caprock or shelter and intrusion dynamic oil reservoir, occur in the igneous rocks in this area.
出处
《大地构造与成矿学》
EI
CAS
CSCD
北大核心
2004年第2期201-208,共8页
Geotectonica et Metallogenia
基金
中国科学院知识创新工程项目 (KZCX2 SW 117)资助
关键词
火山岩型油气藏
储集空间
输导体系
惠民凹陷
igneous rock type oil and gas reservoir
reservoir space
transport system
Huiming depression
