渤海湾盆地胜利油区石炭—二叠系赋存特征及意义

OCCURRENCE CHARACTERISTICS AND SIGNIFICANCE OF CARBONIFEROUS AND PERMIAN IN THE SHENGLI OIL FIELD, THE BOHAI BAY BASIN

缪九军 张欣国 张彦霞 邱岐 李贶

Miao Jiujun Zhang Xinguo Zhang Yanxia Qiu Qi Li Kuang

成都理工大学, 能源学院, 成都, 610059 2. 中国石油化工股份有限公司, 石油勘探开发研究院无锡石油地质研究所, 江苏, 无锡, 214151

College of Energy Resources, Chengdu University of Technology, Chengdu, Sichuan 610059, China 2. Wuxi Research Institute of Petroleum Geology, Research Institute of Petroleum Exploration and Production, SINOPEC, Wuxi, Jiangsu 214151, China

渤海湾盆地济阳坳陷及临清坳陷东部地区(胜利油区)石炭—二叠系经过印支—燕山期的多期挤压以及喜山期的以拉张为主的构造作用后,形成了东西分带分块、南北分带的赋存状况。其中,印支—燕山期挤压抬升北东强、南西弱;喜山期拉张则南东大、北西小,由此造成了大小不等、形态各异、埋深不同的"断块体"。表现为北东断块体碎、小,而南西断块体相对大而成片。此外,2期构造运动的叠加,使得石炭—二叠系残留的断块体厚度成"楔状"。其中,印支—燕山期的多期挤压抬升剥蚀及其所形成的构造反转,造成断块体东西两侧呈逐渐减薄的趋势;而喜山期的强烈拉张,使得断块体北深南浅,北翼深部呈"楔状"减薄,南部逐渐抬高。上述特征对该区石炭—二叠系煤系烃源岩的晚期成烃(主要是二次生烃)、成藏具有相当大的影响。

Carboniferous and Permian strata in the east of Jiyang and Linqing Depressions(the Shengli Oil Field) of the Bohai Bay Basin are zoned and blocked from east to west and zoned from north to south,influenced by multi-compressions during the Indosinian-Yanshanian stage and extensions during the Himalayan stage.Compression uplifts during the Indosinian-Yanshanian stage are strong in the northeast and weak in the southwest.Extensional uplifts during the Himalayan stage are large in the southeast and small in the northwest.Various "blocks" of different sizes,shapes and depths are formed.Blocks in the northeast are small and faulted while those in the southwest are big and jointed.In addition,superimposition of the two stages of tectonic movements has changed Carboniferous and Permian residual block bodies into "wedge shape".Multi-compressions,uplifts and erosions during the Indosinian-Yanshanian stage and the following tectonic reverse result in the gradually thinning trend in the east and west of blocks.Strong extensions during the Himalayan stage make blocks deep in the north and shallow in the south.Blocks are thinning in the deep northern flank like wedges and gradually uplifting in the south.The above-mentioned characteristics have relatively great impact on late hydrocarbon generation(mainly secondary hydrocarbon generation) and accumulation in Carboniferous and Permian in the Shengli Oil Field,the Bohai Bay Basin.

fault blocks|occurrence distribution|Carboniferous-Permian|the Shengli Oil Field|the Bohai Bay Basin

https://doi.org/10.11781/sysydz200802127