松辽盆地东南部外围红庙子断陷油气勘探前景分析--以辽新地1井下白垩统鹰嘴砬子组为例  

OIL AND GAS EXPLORATION PROSPECT OF HONGMIAOZI FAULT DEPRESSION IN THE SOUTHEASTERN PERIPHERY OF SONGLIAO BASIN:A Case Study of Lower Cretaceous Yingzuilazi Formation in LXD1 well

作　　者：李明飞[1] 王丹丹 高屹 王琳[1] 卢天军[1] LI Ming-fei;WANG Dan-dan;GAO Yi;WANG Lin;LU Tian-jun(No.243 Geological Party,CNNC,Chifeng 024000,Inner Mongolia,China;Oil and Gas Resources Survey Center,CGS,Beijing 100083,China)

机构地区：[1]核工业二四三大队,内蒙古赤峰024000 [2]中国地质调查局油气资源调查中心,北京100083

出　　处：《地质与资源》2024年第5期644-652,706,共10页Geology and Resources

基　　金：中国核工业地质局项目“松辽盆地通辽-大林地区铀矿资源调查评价与勘查”(202212);中国地质调查局项目“松辽外围东部地区地质调查井工程”(DD20160165-2).

摘　　要：红庙子断陷位于桓仁盆地北部,是一东断西超的箕状断陷,露头及少量钻探揭示其内发育较好的烃源岩条件.本研究利用该断陷西部辽新地1井的钻探资料,详细分析了前人研究薄弱的鹰嘴砬子组油气地质条件与成藏前景.测试分析表明,红庙子断陷鹰嘴砬子组油气显示较好,烃源岩以半湖相灰黑色泥岩为主,有机质丰度较高,且有机质主体进入成熟生烃阶段,属中等-好烃源岩.储层虽以特低孔、低渗型为主,但其上覆林子头组和下伏果松组均发育安山质火山岩建造储层,为油气藏形成提供了多套储集空间.同时,电法勘探综合解释剖面显示,烃源岩发育的鹰嘴砬子组不仅夹持在林子头组和果松组2套火山岩建造储层之间,并直接与果松组火山建造储层对顶相接,形成了有利的生储盖组合.推测红庙子断陷具有较好的油气勘探前景.Hongmiaozi fault depression,located in northern Huanren Basin,is a half-graben depression faulted in the east and overlapped in the west.The outcrops and limited drilling work reveal a favorable condition for the formation of source rocks.Based on the drlling data from LXD1 well in the western fault depression,the study analyzes the oil-gas geological conditions and accumulation prospect of Yingzuilazi Formation.Test analysis shows that there is good oil-gas indication in Yingzuilazi Formation,with the source rocks dominated by semi-lacustrine grayish black mudstone,high abundance of organic matter,and the main body of organic matter in mature hydrocarbon generation stage,belonging to medium-good source rocks.Although the reservoirs are mainly of ultra-low porosity and low permeability type,the andesitic volcanic rock formation reservoirs are developed in both the overlying Linzitou Formation and underlying Guosong Formation,which provide multiple reservoir spaces for the formation of oil-gas reservoirs.Besides,the electrical exploration comprehensive interpretation section shows that the Yingzuilazi Formation with developed source rocks is sandwiched between the two volcanic formation reservoirs of Linzitou Formation and Guosong Formation,and directly contacted with the volcanic reservoir roof of Guosong Formation,forming a favorable source-reservoir-cap combination.It is inferred that Hongmiaozi fault depression has a good prospect of oil and gas exploration.

关 键 词：下白垩统 鹰嘴砬子组 烃源岩 油气资源 勘探前景 松辽盆地 

分 类 号：P618.13[天文地球—矿床学]