摘要
在分析大庆长垣以东地区天然气成藏条件的基础上 ,以影响含气系统的主要地质条件 (烃源岩和盖层 )为依据 ,将该区划分为 4个含气系统 ,即 :J～K1d2 含气系统、J～K1q1+ 2 含气系统、K1d2 ～K1q1+ 2 含气系统、K1qn～K1qn 含气系统。它们分别形成于登二段沉积末期、泉一、二段沉积末期、泉一、二段沉积末期和嫩四段沉积末期。由于由下至上断至T2 断层在嫩江组和明水组沉积末期的活动开启 ,使该区在某些地区 4个含气系统上下连通形成一个更大的含气系统即J+K1d2 +K1qn ～K1qn 含气系统 ,这是造成该区扶、杨油层天然气多源形成的一个重要原因。
Based on analyzing the formation conditions of gas pools in Daqing Placan ticline and its east,according to the main geological conditions(hydrocarbon sou rcerock and caprock),four gas accumulation systems are divided in the paper.They are: gas accumulation system of J～K 1d 2;gas accumulation system of J～K 1q 1+2 ,gas accumulation system of K 1d 2～K 1q 1+2 ;oil and gas accu mulation system of K 1q n～K 1q n.These four gas accumulation systems form ed in the end of K 1d 2 sedimentary period,the end of K 1q 1+2 sedimentary period and the end of K 1n 4 sedimenary period,Because of active opening of faulted from T 5or T 4 or T 3 to T 2 in the end of K 1n and K 2m,four ga s accumulation systems are made to be linked into a big gas accumulation system( gas ac cumulation system of J+K 1d 2+K 1q n～K 1q n).This is an important reason why the gas in F,Y oil layer is from many different gas sourcerocks.\;Subject key
出处
《新疆石油学院学报》
2000年第4期5-9,共5页
Journal of Xinjiang Petroleum Institute
关键词
松辽盆地
含气系统划分
演化特征
盖层
烃源岩
daqing placanticline and its east
gas accumulation s ystem
dividing in the section
evolution characteristics
caprock
hydrocarbon sour cerock
