摘要
青西油田窿六区块下沟组属于低孔裂缝型油田藏，岩性复杂，砾岩、泥质白云岩是主要的裂缝发育岩性，储层测井评价难度大。通过分段后依据自然伽马，声波时差，补偿中子等曲线的交汇图版能识别储层岩性。在识别岩性的基础上，利用常规测井资料与FMI成像测井资料进行储层裂缝识别，分析天然裂缝发育段测井响应特征，研究裂缝与岩性的关系，裂缝产状，裂缝有效性等问题，研究表明，高产油层以发育高角度裂缝为主，其次是低角度裂缝、水平裂缝，准确识别岩性与裂缝是储层有效性评价以及准确判别流体性质的关键。
The reservoirs of Xiagou formation in Qingxi oilfield belong to low-porosity fracture reservoir with complex lithology which is composed mainly by conglomerate, argillaceous dolomite and dolmitic mudstone. Logging evaluation is difficult.After subsection the lithology can be identified with the crossplot of GR, AC and CNL.On the basis of lighology identification,conventional logging data and FMI imaging well logging data can be used to identify reservoir fracture. The log response characteristics of natural fracture growth interval are analyzed and the relationship between fracture and lithology is studied. Researches indicate that effective fracture are mainly high angle, then low angle, horizontal angle. Accurate lighology and fracture identification is the key of reservoir evaluation and fluid property discrimination.
出处
《国外测井技术》
2011年第4期43-46,3-4,共4页
World Well Logging Technology
关键词
岩性识别
裂缝识别
裂缝倾角
FMI成像图
青西油田
lithology identification
fracture identification
fracture dip
FMI imaging plot
Qingxi oilfield
