大庆SN油田东部过渡带油水边界综合确定  

Comprehensive Determination of Oil⁃Water Boundary in Eastern Transitional Zone of Daqing SN Oilfield

作　　者：梁宇[1] 杨会东[1] 付宪弟[1] 蔡东梅[1] 王彦辉[1] 孙衍民 LIANG Yu;YANG Huidong;FU Xiandi;CAI Dongmei;WANG Yanhui;SUN Yanmin(Research Institute of Exploration and Development,Daqing Oilfield Co.,Ltd.,PetroChina,Daqing,Heilongjiang 163712,)

机构地区：[1]中国石油大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《新疆石油地质》2024年第2期213-220,共8页Xinjiang Petroleum Geology

摘　　要：为确定大庆SN油田东部过渡带油水界面,综合钻井、测井、地震资料,结合岩心含油产状分析和老井油水层二次解释,基于双相介质理论的叠后属性油气检测以及基于叠前地震波形指示反演的流体识别等技术,探讨构造油气藏外扩区油水边界的综合确定方法。研究区油水边界具有以下特征:岩心含油产状为油斑以上;测井解释外推为油层或油水同层;叠后属性低高频能量比大于0.85;叠前反演预测含水饱和度小于75%。因此,以“井点定深度、地震定边界、动态来验证”为原则,从“点—线—面—空”,经过综合分析,确定最终油水边界位置。研究成果有效指导了研究区外扩评价部署,对同类型构造油田油水边界研究具有参考意义。In order to determine the oil-water contact in the eastern transitional zone of the Daqing SN oilfield,based on the drilling,log-ging,and seismic data,together with the core oil occurrence analysis and the reinterpretation of oil/water layers in existing wells,a com-prehensive method for determining the oil-water boundary in the extension zone of structural reservoirs was discussed by using the tech-niques such as hydrocarbon detection through post-stack seismic attributes based on dual-phase medium theories and fluid identifica-tion based on pre-stack seismic waveform indication inversion.The oil-water interface in the study area exhibits the following character-istics:(1)oil patch or higher level occurs in cores;(2)oil layers or oil-water layers are extrapolated on the basis of logging interpretation;(3)in post-stack attributes,the energy ratio of low frequency to high frequency is greater than 0.85;and(4)the predicted water saturation from pre-stack inversion is less than 75%.Therefore,following the principle of“depth of oil-water contact determined by well data,boundaries of oil and water distribution determined by seismic data,and validation by well performance”,and through comprehensive analysis from point to line,plane,and then space,the final position of the oil-water interface was determined.The research results effec-tively guide the extention deployment and evaluation in the study area,and are referential for delineating the oil-water boundaries in sim-ilar structural reservoirs.

关 键 词：构造油气藏 油水边界 井震资料 叠后属性 叠前反演 综合分析 

分 类 号：TE112.321[石油与天然气工程—油气勘探]