松辽盆地北部深层断陷分布规律及勘探潜力  

DISTRIBUTING LAWS AND EXPLORATORY POTENTIALS OF THE DEEP FAULT DEPRESSIONS IN NORTH SONGLIAO BASIN

作　　者：黄薇[1] 杨步增[1] 孙立东[1] 李广伟[1] 王秋菊[1] 王晓莲[1] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院

出　　处：《大庆石油地质与开发》2014年第5期76-81,共6页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家重点基础研究发展计划(973)项目“火山岩油气藏的形成机制与分布规律”(2009CB219308);中国石油天然气股份公司重大专项“大庆探区非常规油气勘探开发关键技术研究与现场试验”(2012E-2603-02)

摘　　要：松辽盆地深层断陷是天然气勘探的重要领域,近年来徐家围子、长岭等断陷均取得了较好勘探成果,但其他断陷是否具有形成气藏的地质条件不得而知.为此,以松辽盆地深层断陷结构解释为基础,结合区域地质背景研究认为：松辽盆地深层发育了一系列NNE、NE、NNW向断裂控制的分割断陷,受隆起带分割发育了3个断陷带和1个斜坡带,自东向西断裂活动逐渐变弱;NW-NNE向张扭性共轭断裂控制了沙河子组的空间分布,进而决定了烃源岩展布;营城组沉积末期构造运动产生了大量的气源断裂,挤压形成的隆起构造是油气运移的有利指向;经断陷成藏条件评价,明确了近期勘探的3个层次。The deep fault depressions in Songliao Basin are the important area of natural gas exploration.In recent years,although the much better exploratory achievements are obtained in Xujiaweizi and Changling Fault Depressions,whether the other fault depressions possess the geological conditions of the gas reservoir accumulation or not is still on the air.Therefore based on the structure interpretation of the deep rifts in Songliao Basin and combined with the regional geological background studies,the following conclusions are drown：a series of divided rifts controlled by NNE,NE and NNW-trending faults are developed in the deep zone of Songliao Basin; well-developed 3 fault depression belts and 1 ramp belt are divided by uplift zones,the strength of fault activity diminishes from east to west; the special distribution of Shahezi Formation is controlled by NW-NNE-trending tenso-shear conjugation faults,and furthermore,so are the spread and distribution of the source rocks.A lot of faults which are communicated with the gas source rocks are induced during the last stage of Yingcheng Formation deposition period,the uplifted structures which are formed by the compression are favorable migration-aimed areas ; on the basis of the evaluation of the rift accumulation conditions,3 current exploration steps are defined.

关 键 词：松辽盆地 断陷分布规律 天然气 勘探潜力 

分 类 号：TE121.1[石油与天然气工程—油气勘探]