长岭断陷SZJ洼槽致密气藏成藏模式及目标优选  

Reservoir Forming Mode and Target Optimization of Tight Gas Reservoir in SZJ Sub-Sag of Changling Depression

作　　者：仇谢 Qiu Xie(Geophysical Exploration Research Institute of Jilin Oilfield Company,PetroChina,Songyuan 138000,Jilin,China)

机构地区：[1]中国石油吉林油田公司地球物理勘探研究院,吉林松原138000

出　　处：《吉林大学学报（地球科学版）》2023年第2期384-392,共9页Journal of Jilin University：Earth Science Edition

基　　金：国家科技重大专项(2017ZX05008-006-002-002);中国石油科技重大专项(JJKH20180990KJ)。

摘　　要：为了探寻吉林探区天然气接替资源,本文采用精细智能构造解释技术、低井控下速度场建模技术和特征参数反演技术,对探区内资源潜力最大的松辽盆地长岭断陷SZJ洼槽进行了研究,预测了SZJ洼槽沙河子组烃源岩及储层分布规模和洼槽整体含气性。结果表明:研究区内优质烃源岩生烃叠加面积约356 km^(2),累计厚度100~300 m,沙河子组有利储层分布叠加面积316 km^(2),累计厚度56~125 m。根据分析研究区的源储配置关系,沙河子组致密气藏成藏模式有断鼻式、上倾尖灭式和侧向对接式3种类型;优选出气藏A、B、C 3个高产富集有利目标区。目标区均位于洼槽T 41反射层中部断裂带断背斜圈闭范围内,且优选区已经得到钻井证实。松辽盆地长岭断陷深洼内致密气藏资源潜力较大。In order to explore the natural gas replacement resources in Jilin exploration area,the SZJ sag in Changling fault depression of Songliao basin,which has the most significant resource potential in the exploration area,was studied by using fine intelligent structural interpretation technology,low well control velocity field modeling technology,and characteristic parameter inversion technology.The distribution scale of hydrocarbon source rocks and reservoirs of Shahezi Formation in SZJ sag and the overall gas bearing capacity of the sag are predicted.The results show that the superimposition area of high-quality hydrocarbon source rocks in the study area is about 356 km^(2),with a cumulative thickness of 100-300 m.The superimposition area of favorable reservoir distribution in Shahezi Formation is 316 km^(2),with a cumulative thickness of 56-125 m.According to the analysis of the source-reservoir configuration relationship in the study area,the tight gas reservoir formation model of Shahezi Formation has three types:fault-nose type,updip pinch-out type and lateral docking type;The three favorable target areas for high yield and enrichment of gasaccumulation A,B and C are all located in the fault anticlinal trap range of the central fault zone of the T 41 reflector in the depression,and the optimized areas have been confirmed by drilling.The tight gas reservoir resources in the deep depression of Changling fault depression in Songliao basin have great potential.

关 键 词：长岭断陷 SZJ洼槽 烃源岩分布 有利储层预测 成藏模式 圈闭优选评价 

分 类 号：TE122[石油与天然气工程—油气勘探]