伏龙泉断陷登娄库组地层再认识及对勘探的地质意义  

Reevaluation of the Denglouku Formation in Fulongquan Fault Depression and its geological significance for exploration

作　　者：宋立斌[1] 孙凯[1] 姜宏官 SONG Libin;SUN Kai;JIANG Hongguan(Exploration and Development Research Institute of PetroChina Jilin Oilfield Company,Jilin Songyuan 138000,China)

机构地区：[1]中国石油吉林油田公司勘探开发研究院,吉林松原138000

出　　处：《非常规油气》2023年第6期8-17,共10页Unconventional Oil & Gas

基　　金：中国石油集团公司前瞻性战略性技术攻关项目“陆相深层超深层油气富集规律与勘探评价技术研究”之专题“松辽盆地深部含油气系统研究”(2021DJ0205)。

摘　　要：松辽盆地南部伏龙泉断陷是受边界断裂控制的小型箕状断陷,该断陷登娄库组构造和沉积演化复杂,地层组/段的划分一直存在争议。针对登娄库组地层存在划分混乱的问题,从登娄库组松基6井建组剖面分析入手,通过对登娄库组岩石组合、沉积旋回及标志层特征的分析,确定了登娄库组岩石地层学、生物地层学及年代地层学特征。在伏龙泉断陷重新建立了登娄库组综合地层划分标准,并通过伏14标准井合成地震记录标定,明确了登娄库组地层的地震波组响应特征。按照“格架地层剖面井震对比”统层方法完成了对伏龙泉断陷登娄库组地层的统一划分。新建立的登娄库组分层方案和地层识别标准,不仅对松辽盆地南部伏龙泉断陷的气藏勘探开发地质研究起到重要的推动作用,也将为松辽盆地其他断陷登娄库组地层划分起到良好的借鉴作用。The Fulongquan Fault Depression in the southern Songliao Basin is a small dustpan-shaped fault depression controlled by boundary faults.The tectonic and sedimentary evolution of the Denglouku Formation in this fault de-pression is intricate,and the division of stratigraphic formation/segments has been a subject of prolonged controver-sy.To address the issue of the confusion stratigraphic division of Denglouku Formation,starting with the analysis of the lithological profile of well Songji6 in Denglouku Formation,the petrostratigraphic,biostratigraphic and chronos-tratigraphic characteristics of the Denglouku Formation are determined through analyzing the rock assemblage,sedi-mentary cycles and the characteristics of the marker layers.In the Fulongquan Fault Depression,the comprehensive stratigraphic division standard of the Denglouku Formation was re-established,through the calibration with synthetic seismic records of the standard well Ful4,the seismic wave group response characteristics of the strata of the Den-glouku Formation have been determined.According to the method of"well-seismic correlation of grid stratigraphic profile",the unified division of the Denglouku Formation in the Fulongquan Fault Depression is completed.This newly established scheme of the division of stratigraphic groups and stratigraphic indentification criteria of Denglouku Formation not only contribute to the geological research of the exploration in the Fulongquan Fault Depression of the southern Songliao Basin,but also benefit the stratigraphic division of else faults in the southern Songliao Basin.

关 键 词：伏龙泉断陷 登娄库组地层 岩石地层学特征 古生物孢粉特征 地层划分对比 

分 类 号：P631[天文地球—地质矿产勘探]