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OA北大核心CSTPCD
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
孤北洼陷南斜坡东部砂体成因复杂,预测难度大,严重制约着该区油藏后续的勘探开发.利用地震、钻井、测井、岩芯及分析化验等基础资料,开展了孤北洼陷南斜坡东部油藏地质特征研究,明确了沙三段主要沉积体系及特征,刻画了不同沉积成因的砂体展布,阐明了控藏要素耦合下的有利目标区.研究表明:孤北洼陷南斜坡东部沙三段不同部位砂体成因复杂,物源主要来自西南方向的孤岛凸起及东北方向的长堤凸起,分别发育三角洲、扇三角洲相沉积,两者间为同期共生的滑塌沉积;优选均方根振幅、有效频宽、相位谱 3类地震属性,应用分频RGB融合技术与测井信息对比验证,实现了不同沉积成因砂体的精细刻画,向北拓展了三角洲砂体的展布范围,发现了新的滑塌浊积砂体;通过将距离油源较近、砂体发育区、构造高部位及与断层的配置关系等 4个控藏要素在平面上进行叠合,优选了新有利目标Z242井区,后期通过井位钻探证实了井区潜力较大,推动了孤北洼陷油藏的高效开发.该研究对三角洲相砂岩油藏勘探开发具有重要的指导意义.
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.
李宏宏;郝孝春;常伟;杨勇;王春伟
昆仑数智科技有限责任公司,北京 102206山东省煤田地质局第五勘探队,济南 250100中石化经纬有限公司地质测控技术研究院,青岛 266071
海洋学
孤北洼陷分频RGB融合技术沉积体系控藏要素
Gubei Subsagfrequency-division RGB fusion technologysedimentary systemreservoir-con-trolling factors
《海洋地质前沿》 2024 (010)
61-70 / 10
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)
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