摘要
渤海湾盆地大港和华北探区近年连续在千米桥等奥陶系潜山获得重要勘探突破 ,表明以奥陶系为主的潜山仍是有潜力的勘探领域。根据已发现潜山油气藏的成藏条件 ,划分出 5类成藏组合 :潜山埋藏型 ,构造反转型 ,顺层溶蚀 运移型 ,晚期成岩 (侵蚀 )型 ,古生古储型。在原有潜山勘探理论的基础上提出 :燕山末期至早第三纪的构造反转对潜山发育和油气成藏具有重要的作用 ;奥陶系碳酸盐岩的溶蚀具有多种途径和形式 ;逆冲构造体系是形成下古生界原生油气藏和煤成油气藏的最有利构造样式。取得潜山勘探成果的关键因素是 :采用以叠前深度偏移为主的地震处理技术精确落实潜山圈闭 ;有针对性地选准研究工作思路 ,进行包括 10项研究内容的多学科地质综合研究 ,正确建立奥陶系潜山油气藏成因模式 ;形成以欠平衡为要点的十大钻井工艺技术系列。
In recent years, a series of new important discoveries have been made in Ordovician buried hill of Qianmiqiao, Wumaying, and other places of Dagang and Huabei in Bohai Bay basin, which shows that Ordovician buried hills have the great potential for oil and gas exploration. According to present buried hill reservoir plays, a total of five different types of reservoir play can be identified: buried hill, structural reversal, bedding corrosion migration, late diagenesis and the one that generated and accumulated in the Paleozoic. Based on origin theory of buried hill exploration, a series of new viewpoints are put forward in this paper, such as the structural reversal of Mesozoic and Cenozoic plays an important role in the formation of buried hill oil and gas reservoir plays; corrosion of Ordovician carbonate reservoir displays in different ways and forms and thrust structure system is the most favorable structure mode formation of primary oil/gas reservoir of Paleozoic and coal formed oil/gas reservoir. The key factors to the success of the buried hill exploration could be summarized as following: to precisely prove buried hill trap by means of seismic processing technique characterized by pre stack depth migration; to correctly select studying thinking, namely performing comprehensive geology study including 10 rinds of contents; to establish origin modes of Ordovician buried hill reservoir plays and to form 10 technical series including under balanced drilling.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2000年第5期1-4,共4页
Petroleum Exploration and Development
关键词
渤海湾盆地
奥陶系
油气藏
成藏组合
勘探
Huanghua depression, Jizhong depression, Ordovician, Carbonate rock, Buried hill, Reservoir formation, Type, Pattern, Exploration, Technique
