摘要
红旗凹陷是海拉尔盆地中部断陷带油气勘探的又一重要领域。为了搞清其有效烃源岩发育情况、展布特征及有利勘探目标区,在对本区内已钻10口探井暗色泥岩地化资料分析基础上,开展原油色谱-质谱分析和生物标志化合物对比、w(TOC)和R o预测及井震标定,在地震剖面上进行暗色泥岩对比追踪等方法预测有效烃源岩的厚度及分布,结合构造、沉积相研究,确定有利勘探区。结果表明:红旗凹陷铜钵庙组及塔木兰沟组暗色泥岩有机质丰度高,有机质类型以Ⅱ1型为主,达到好烃源岩标准;凹陷的洼槽区铜钵庙组下部、塔木兰沟组暗色泥岩厚度大、分布广泛、成熟度高,为有效烃源岩。洼槽间的低隆起带和西部陡坡带发育扇三角洲沉积,生、储、盖配置好,是有利勘探部位,油藏为自生自储。
Hongqi Sag is another important area of oil and gas exploration in Middle Hailar Basin.In order to find out the development,distribution characteristics and favorable target area of the effective hydrocarbon source rock,based on the analysis of the dark mudstone geochemical data of 10 drilling wells in the area,the crude oil chromatography-mass spectrometry analysis,and biomarker compounds comparison,organic carbon and Ro predictions and well-seismic calibration were conducted,and moreover on the seismic profiles,with the help of the dark mudstone contrasting and tracking methods and so on,the thickness and distribution of the effective hydrocarbon source rocks were predicted.In addition,combining with the studies on the structures and sedimentary facies,the favorable exploration areas were identified.The results show that the organic matter abundances of the dark mudstone in Tongbomiao and Tamlangou Formations in Hongqi Sag are pretty higher,the organic matter type is mainly Type II1,which reaches the standards of the good source rock;Lower Tongbomiao Formation in the sag lower area and Tamlangou Formation characterized by pretty large dark mudstone thickness,wide distribution and high maturity are the effective source rocks.The fan delta depositions are well-developed in the low uplift zone between the lower areas and the west steep slope zone with well-configured hydrocarbon generation-reservoir-caprock,so they are the favorable exploration parts and the oil reservoirs are self-generated and self-stored.
作者
张海桥
ZHANG Haiqiao(Exploration and Development Research Institute of Daqing Oilfield Co Ltd,Daqing 163712,China)
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2020年第2期21-27,共7页
Petroleum Geology & Oilfield Development in Daqing
基金
国家科技重大专项“大庆油气持续有效发展关键技术研究与应用”(2016E-0202)。
关键词
海拉尔盆地
红旗凹陷
烃源岩
油源对比
铜钵庙组
塔木兰沟组
油藏
Hailar Basin
Hongqi Sag
source rock
oil-source correlation/comparison/contrast
Tongbomiao Formation
Tamlangou Formation
oil reservoir
