摘要
莺歌海盆地中央泥拱构造带位于莺歌海坳陷中心区，天然气资源极其丰富，具有多套区域性储盖组合，存在着一批大型泥拱背斜圈闭；在浅层、中深层和深层三种组合中，中深层是最有利的勘探领域。据泥拱活动的强度将莺歌海盆地中深层泥拱构造分为三种类型：①能量保存型，泥拱活动强度较弱，刺穿不明显，如ＤＦ１—１构造；②能量消耗型，泥拱活动强度大，见明显刺穿现象，两翼地层向底辟核部上倾，地震时间剖面上有明显背斜构造形态，但核部局部出现塌陷，经速度校正构造幅度增大，如ＬＤ８—１构造；③能量过渡型，泥拱活动强度大，见明显刺穿现象，但地震时间剖面上无明显背斜构造形态，经速度校正可有一定幅度，如ＬＤ２２—１构造。其中ＤＦ１—１型泥拱构造目的层埋深适中（２６００～３２００ｍ），预测天然气资源量达５０００多亿立方米，是最有利的勘探领域。
The central mud diapir structure belt in Yinggehai Basin is located at the central part of Yinggehai Depression,being rich in gas resources and having multiple regional reservoir seal assemblages and a great deal of large sized mud diapir anticlinal traps.Among the shallow,middle and deep assemblages,the middle one is the most beneficial exploration interval.The middle mud diapir structures in Yinggehai Basin can be divided into three types according to the strength of diapiric activity:①Energy Preservation Type—it is of weak diapiric activity with an unnoticeable piercement,as structure DF1—1;②Energy Consumption Type—it is of strong diapiric activity with a noticeable piercement,the strata on two flanks incline up to the core of the diapir and in the seismic section there is an obvious anticlinal structure with a local collapse at its core,its uplifted height increasing through velocity correction,as structure LD8—1;③Energy Transition Type—it is of strong diapiric activity with a noticeable piercement,but in the seismic section there is no obvious anticlinal structure and through velocity correction a certain uplifted height can be found,as structure LD22—1.Among them,the buried depth of objective formation of the DF1—1 mud diapir structure is moderate (2 600～3 002 m) and the natural gas resource extent forecasted is up to more than five hundred billion cubic metres,which is the most beneficial exploration region.Therefore it is suggested to quicken its exploration process.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
1999年第1期28-30,共3页
Natural Gas Industry
关键词
莺歌海盆地
中央泥拱
气藏
勘探区
天然气勘探
Yinggehai Basin,Depression,Middle,Diapiric fold,Gas reservoir formation,Source reservoir cap assemblage,Exploration region
