摘要
鄂尔多斯盆地东部王庄区长6油层组为致密砂岩储层,储层物性差,非均质性强,明确其储层“四性”关系及有效储层参数下限对甜点预测具有重要意义。通过岩心、测录井以及物性分析资料,明确了王庄区长6储层“四性”关系。其中细砂岩物性整体相对较好,声波时差与储层物性具有较好的对应关系,深感应电阻率则对含油性具有较好的指示性,油水层的深感应电阻率平均值为20~40Ω·m,水层为12~16Ω·m。在此基础上综合岩心、测录井、试油试采及多种分析化验资料,采用多种方法,最终确定王庄区长6油层组有效储层各项参数下限,分别为:孔隙度为8.0%,渗透率为0.2 mD,岩性下限为细砂岩,含油级别下限为油迹,含油饱和度为38.0%,深感应电阻率为20.0Ω·m,声波时差为215μs/m。
The Chang 6 oil member in the Wangzhuang area,eastern Ordos Basin is a tight sandstone reservoir with poor reservoir physical properties and strong heterogeneity.It is significant to clarify the relationship between the reservoirs four properties and the lower limit of effective reservoir parameters for dessert prediction.The core,logging,and physical property analysis data were used to clarify the“four properties”relationship of Chang 6 reservoir in the Wangzhuang area.The physical properties of fine sandstone are relatively good,and there is a good correspondence between acoustic time difference and reservoir physical properties.In addition,the deep induction resistivity has a good indication of reservoir oiliness.The average deep induction resistivity of the oil-water layer is 20~40Ω·m,while that of the water layer is 12~16Ω·m.On this basis,combined with core,logging,production test,and geochemical analysis data,and using a variety of methods,the lower limit of effective reservoir parameters of Chang 6 reservoir in the Wangzhuang area was determined.The results are as follows:the porosity is 8.0%,the permeability is 0.2 mD,the lower limit of lithology is fine sandstone,the lower limit of oil grade is oil trace,the oil saturation is 38.0%,the deep induction resistivity is 20.0Ω·m,and the acoustic time difference is 215μs/m.
作者
王春艳
王波
龚建涛
WANG Chun-yan;WANG Bo;GONG Jian-tao(Department of Exploration,Yanchang Oil Field Co.,Ltd.,Yanan 716000,China;Development Department,Yanchang Oilfield Co.,Ltd.,Yanan 716000,China)
出处
《科学技术与工程》
北大核心
2023年第16期6775-6784,共10页
Science Technology and Engineering
关键词
四性关系
有效储层下限
致密砂岩储层
长6油层组
鄂尔多斯盆地
four properties relationship
lower limit of effective reservoir
tight sandstone reservoir
Chang 6 oil member
Ordos Basin