海洋地质前沿2024，Vol.40Issue(10)：61-70,10.DOI:10.16028/j.1009-2722.2023.290
济阳坳陷孤北洼陷南斜坡东部沙三段沉积体系及有利目标研究
Study on the depositional system and favorable targets of the Third Member of the Shahejie Formation in the eastern part of the southern slope of Gubei Subsag,Jiyang Depression
摘要
Abstract
The formation of sand bodies in the eastern part of the southern slope of Gubei Subsag(ESS)is com-plicated and difficult to predict,which seriously restricts the subsequent exploration and development of the reser-voir in the ESS.Based on seismic,drilling,well logging,coring,and chemical analytical data,the geological char-acteristics of the reservoir in the ESS were studied.The main sedimentary systems and characteristics of the Third Member of the Shahejie Formation were defined,the sand body distribution of different sedimentary genesis was described,and the favorable target area under the coupling of reservoir control factors was clarified.Results show that the origin of sand bodies in different parts of the Third Member of the Shahejie Formation in the EES is com-plex,and the provenance is mainly from the Gudao bulge in the south and the Changdi bulge in the northeast,where the delta and fan delta facies are developed,respectively,and between which coexisting olistostrome depos-its were developed simultaneously.In the optimal root mean square,three seismic attributes:amplitude,effective bandwidth,and phase spectrum were selected,and the frequency-division RGB fusion technology was applied to compare and confirm with logging information.The fine characterization of sand bodies of different sedimentary origins was realized,the distribution range of delta sand bodies was found to expand northward,and a new olisto-strome-turbidite sand body was discovered.The new favorable target Z242 well area was selected by combining four reservoir-controlling factors,i.e.,short distance to the oil source,sand body well-developing,structural high,and fault existence,after which a new favorable target Z242 well area was selected and later,well location drilling confirmed that the new target area has great potential.This research promoted the efficient development of oil reservoirs in the Gubei Subsag and has important guiding significance for the exploration and development in delta facies sandstone oil reservoirs.关键词
孤北洼陷/分频RGB融合技术/沉积体系/控藏要素Key words
Gubei Subsag/frequency-division RGB fusion technology/sedimentary system/reservoir-con-trolling factors分类
海洋科学引用本文复制引用
李宏宏,郝孝春,常伟,杨勇,王春伟..济阳坳陷孤北洼陷南斜坡东部沙三段沉积体系及有利目标研究[J].海洋地质前沿,2024,40(10):61-70,10.基金项目
国家重点研发计划项目"油/水/固界面浸润调控智能流体提高采收率关键材料与机理研究"(2019YFA0708700) （2019YFA0708700）
