南阳凹陷砂砾岩体甜点区预测及效果  

Prediction and effect of sweet spot area of glutenite body in Nanyang Sag

作　　者：张永华[1] 郑凯文[1] 张悦 李连生[1] 肖湘 贺莨 李黎明[1] ZHANG Yonghua;ZHENG Kaiwen;ZHANG Yue;LI Liansheng;XIAO Xiang;HE Liang;LI Liming(Exploration&Development Research Institute of Henan Oilfield Company,SINOPEC,Nanyang 473000,Henan,China;N0.2 Oil Production Plant of Dagang Oilfield Co.,Ltd.,PetroChina,Daqing 163000,Heilongjiang,China)

机构地区：[1]中国石化河南油田分公司勘探开发研究院,河南南阳473000 [2]中国石油大庆油田有限责任公司第二采油厂,黑龙江大庆163000

出　　处：《石油地质与工程》2024年第3期14-17,22,共5页Petroleum Geology and Engineering

摘　　要：南阳凹陷黑龙庙地区砂砾岩体规模小,多期砂体叠置,沉积期次划分难,非均质性强、甜点区难以预测。为此,利用可视化技术对三维地震资料进行精细构造解析与古构造恢复,研究砂砾岩体成因。在对5口井层序地层划分基础上,依据砂组-砂体的沉积旋回性与地震反射结构,划分砂砾岩体沉积期次;通过岩石物理分析与正演模拟明确砂砾岩体地球物理响应特征。通过井点处扇根、扇中、扇端地震反射特征与相同层位其他点处的地震反射特征进行相关分析,确定扇根、扇中、扇端的平面分布;实测砂砾岩体岩性、物性参数与波阻抗属性,交汇分析确定有效区分砂砾岩与泥岩的波阻抗属性的值域。依据高精度反演得到的波阻抗数据体,在砂砾岩体储层波阻抗值域及顶底反射层位控制下,求出有效储层厚度与分布,圈定砂砾岩体储层甜点区的范围。以此为依据在其甜点区上部署的HL1井日产油5.46 m 3,预测结果与实钻井一致。In view of the characteristics of small sandstone mass,multi-stage sand superposition,difficult division of sedimentary stages,strong heterogeneity,the sweet spot area in Heilongmiao region,Nanyang Sag is difficult to predict.Therefore,the visualization technology is used to analyze the fine structure of the 3D seismic data and restore the paleo-structure,and then the study on the genesis of the sand gravel rock mass is carried out.According to the sedimentary cycle and seismic reflection structure of sand-sand body,the sedimentary stages of sand-gravel rock mass are divided on the basis of sequence stratigraphic division of 5 wells.Through petrol-physical analysis and forward modeling,the geophysical response characteristics of gravel rock mass are determined.Through the correlation analysis between the seismic reflection characteristics of fan root,fan middle and fan end at well point and the seismic reflection characteristics of other points in the same layer,the plane distribution is determined.Through the intersection analysis of the measured lithology,physical property parameters and wave impedance properties,the range of wave impedance properties of gravel rock and mudstone is determined.Based on the wave impedance data obtained by high-precision inversion,the effective reservoir thickness and distribution are obtained under the control of the wave impedance range and the top and bottom reflection horizon,and the sweet spot area of the sandstone reservoir is delineated.Based on this,the HL1 well deployed in the sweet spot produced 5.46 m 3/d,which is consistent with the actual drilling results.

关 键 词：南阳凹陷 砂砾岩体 成因机制 正演模拟 沉积期次 甜点预测 甜点区 

分 类 号：P631[天文地球—地质矿产勘探]