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冀中拗陷北部潜山带隔层有效性综合评价
Effectiveness of interlayers in buried hills, northern Jizhong depression
王新龙 苏 敏 刘宁静 许 菲
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DOI:
作者单位:中国石油集团测井有限公司华北事业部
中文关键字:潜山内幕 深潜山 隔层分布 物性 烃浓度 排替压力 有效性 测井评价
英文关键字:Inner buried hill; Deep buried hill; Distribution of barrier; Physical property; Hydrocarbon concentration; Displacement pressure; Effectiveness; Logging evaluation
中文摘要: 冀中拗陷北部潜山带隔层能否起到有效隔层的作用,是深潜山及潜山内幕油气藏形成的关键。根据区域潜山成藏类
型,层序地层、沉积相特点,结合岩心、薄片等实验数据及元素俘获、阵列声波、电成像等测井资料进行综合分析判断,对深潜
山及潜山内幕奥陶系、寒武系、青白口系、蓟县系盖隔层分布特征进行总结分类,并从隔层的岩性、物性、烃浓度、压力封闭等
微观特征进行评价,形成了一套较完整的隔层测井评价方法:①利用自然伽马能谱、ECS 元素测井资料,分析黏土矿物对封隔质
量的影响,定量计算矿物组分含量,准确判断岩性;②利用交会图技术提高泥质岩物性计算精度;③综合利用三孔隙度曲线、电
成像及阵列声波资料,提高浓度封闭及有效性评价计算精度;④对封隔性重要参数排替压力求取方法进行研究,提高了纵向封闭
能力的判断精度。利用该方法对北部潜山带不同隔层类型的有效性进行综合评价,确定了隔层发育区分布规律,并建立了不同层位、
不同区域的评价标准。

DOI: 10.12055/gaskk.issn.1673-3177.2018.01.002






英文摘要:The effectiveness of interlayers in buried hills, northern Jizhong depression, is the key factor to form deep buried hill and
inner buried hill reservoirs. In this paper, the distribution characteristics of Ordovician, Cambrian, Qingbaikou and Jixian interlayers
of deep and inner buried hills were identified and classified after comprehensive analysis on some experimental data (cores and thin
sections) and logging data (element capture, array acoustic and electric imaging), depending on the types of buried-hill hydrocarbon
accumulation, together with the characteristics of sequence stratigraphy and sedimentary facies. Then, the microscopic characteristics
of interlayers were evaluated from aspects of lithology, physical property, hydrocarbon concentration, and pressure sealing. Finally, a
relatively complete logging evaluation method suitable for interlayers was developed. First, the effect of clay minerals on interlayer
performance is analyzed, the content of mineral composition is calculated quantitatively, and the lithology is discriminated accurately
by using natural gamma-ray spectroscopy and ECS logging data. Second, crossplot technology is adopted to increase the calculation
accuracy of physical properties of argillaceous rocks. Third, tri-porosity curve is combined with electric imaging and array acoustic
log to increase the calculation accuracy of concentration sealing and effectiveness evaluation. And fourth, the method used to calculate
the important sealing parameters (i.e. displacement pressure) is investigated, so as to improve the accuracy to discriminate the vertical
sealing capacity. By virtue of this method, the effectiveness of interlayers in buried hills is evaluated comprehensively. Thus, the
distribution laws of interlayer development areas are determined, and the evaluation criteria for different horizons and areas are established.
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国内统一连续出版物号:CN51-1159/TE |国内发行代码: |国际标准出版物号:ISSN1673-3177 |国际发行代码:
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