高压低孔隙度低渗透率储层流体测井响应特征研究  

Reserch on Logging Response Characteristics of Fluid in the Reservoir with High Pressure,Low Porosity and Low Permeability

作　　者：蒋云箭 周广清 柴春艳 冷洪涛[3] JIANG Yunjian;ZHOU Guangqing;CHAI Chunyan;LENG Hongtao(Oil and Gas Exploration and Management Center,Shengli Oilfield Company,SINOPEC,Dongying,Shandong 257200,China;Marginal Oilfield Developing Project,Management Center of Sinopec Oilfield Service,Shengli Corporation,SINOPEC,Dongying,Shandong 257000,China;Shengli Well Logging Company of Sinopec Matrix Corporation,Dongying,Shandong 257096,China)

机构地区：[1]中国石化胜利油田分公司油气勘探管理中心,山东东营257200 [2]中国石化胜利石油工程有限公司难动用项目管理中心,山东东营257000 [3]中国石化经纬有限公司胜利测井公司,山东东营257096

出　　处：《测井技术》2021年第6期617-623,共7页Well Logging Technology

摘　　要：高压低孔隙度低渗透率储层具有压力系数高、储层物性差、钻井过程中流体显示活跃等多重特征。由于高压低孔隙度低渗透率储层流体测井响应特征不明显,储层含油性评价难度较大。通过对比常压条件下低孔隙度低渗透率储层与常规储层钻井液滤液侵入差异,指出常压低孔隙度低渗透率储层中影响地层电阻率的因素相对单一,主要为钻井液滤液的驱替作用。基于胜利油田多个探区高压储层地质和测井资料,开展了高压条件下低孔隙度低渗透率储层测井响应特征和钻井液滤液驱替特征研究。与常压低孔隙度低渗透率储层钻井液滤液驱替特点不同,高压低孔隙度低渗透率储层钻井液滤液侵入剖面分布范围窄、相对稳定、持续时间长,钻井液滤液对地层电阻率影响程度小,含油储层存在比较明显且相对稳定的电阻率低侵响应特征,电阻率低侵特征与储层流体性质具有较好的对应关系。综合上述认识,绘制了高压低孔隙度低渗透率储层双侧向电阻率流体识别特征图,并开展了储层流体性质定性分析和有效性定量评价。研究成果大幅度提升了胜利油田准噶尔盆地中部深层和济阳坳陷高压低孔隙度低渗透率储层流体识别与储层有效性评价的准确性。The reservoir with high pressure,low porosity and low permeability has many characteristics,such as the high pressure coefficient,poor physical properties and the active oil and gas show in the process of drilling.Due to the indistinct logging response characteristics of the fluid in the reservoir with high pressure,low porosity and low permeability,the difficulty to evaluate the oil-bearing properties is increased.By comparing the invasion difference of mud filtrate between the reservoir with low porosity and low permeability and conventional reservoir under normal pressure,it is pointed out that factors affecting the formation resistivity are relatively simple in the reservoir with normal pressure,low porosity and low permeability.The dominant factor is the mud filtrate displacement.Based the geologic characteristics and the logging data of the high pressure reservoir in the different region of Shengli oilfield,the research on the characteristics of the logging response and mud filtrate displacement in the low porosity and low permeability reservoir under high pressure are carried out.Distinguished from the mud filtrate displacement characteristics of the low porosity and low permeability reservoir under the normal pressure,the distribution zone of the mud filtrate invasion profile is narrow,relatively stable and can last for more time in the reservoir with high pressure,low porosity and low permeability.The effects of the mud filtrate on the resistivity are fewer.The low resistivity invasion feature is more distinct and relatively stable in the oil-bearing reservoir.There is a good corresponding relationship between the low resistivity invasion feature and the fluid property.Based on the above understandings,the characteristic diagram to identify the fluid using dual lateral resistivity is drew for the reservoir with high pressure,low porosity and low permeability.Meantime,the qualitative analyses and the quantitative effectiveness evaluation of fluid properties are completed.The results show that the accuracy

关 键 词：测井评价 高压 低孔隙度低渗透率储层 低侵响应 流体识别 双侧向电阻率 胜利油田 

分 类 号：P631.84[天文地球—地质矿产勘探]