摘要
济阳坳陷南部东营凹陷—惠民凹陷深层的孔店组勘探程度较低 ,建立其地层格架 ,是油气勘探研究及战略部署必走的一步。认为孔店组沉积期研究区基本是北断南超的伸展半地堑 ,4个沉降中心明显受断层控制 ;以埕宁隆起和鲁西隆起为主要物源区 ,区域物源丰富 ;气候早湿晚干 ,水体整体较浅 ,但有深水区域发育的条件。把孔店组确定为完整的Ⅲ级层序 ,划分为低位体系域 (对应于孔三段 )、湖侵体系域 (对应于孔二段中、下部 )、高位体系域 (对应于孔二段上部和孔一段中、下部 )和收缩体系域 (对应于孔一段上部 )及若干准层序。解释了研究区总长约 30 0 0km地震剖面 ,建立了4条钻井地震联合剖面 ,建立起宏观层序地层格架 ,认识到孔店组有深水洼地相间分布、多个次级沉积中心共存的特点 ,烃源岩 (类型主要为Ⅱ2 —Ⅲ型 )主要发育在湖侵体系域中。建议增加孔店组油气勘探的速度。图 3参 2 (王孝陵摘 )
Kongdian Formation in Dongying-Huimin sag of Jiyang depression, which is deeply buried, has been less explored. Based on the studies of the regional geologic background, Dongying-Huimin sag in the Kongdian period was a pull-apart semi-graben with the north being a fault and the south being an overlap. The setting is beneficial to the development of source rock due to the abundant regional source areas, the climate being humid in early period and arid in late period, the water body being shallow as a whole while some places being beneficial to the development of the deep water area. The precise sequence stratigraphic studies on well logs manifest that Kongdian Formation developed a complete sequence (third order) which is subdivided into lowstand system tract, transgressive system tract, highstand system tract and shrinking system tract. Firstly, the results of sequence stratigraphy studies, such as the burial depth of the sequence or system tract boundaries, are projected to the well-tie seismic sections. Then the macroscopic sequence stratigraphic framework is constructed through the control function of the seismic section. The correlation error is within the tolerance of the seismic explanation. The authors suggest that the sequence stratigraphy system should be established, thus adapting to the further research of Kongdian Formation and satisfying the need of the petroleum exploration and development.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2000年第6期28-30,共3页
Petroleum Exploration and Development
关键词
东营凹陷
惠民凹陷
孔店组
层序地层学
油气勘探
Eocene epoch, Stratigraphic, Prototype, Sedimentary basin, Seismic interpretation, Oil and gas exploration, Dongying seg, Huimin seg
