【作者】 林博； 戴俊生； 陆先亮； 张本华；

【Author】 LIN Bo;DAI Jun-sheng;LU Xian-liang;ZHANG Ben-hua;China University of Petroleum(East China);Gudao Oilfield Production Plant,Shengli Petroleum Administration Bureau;

【机构】 中国石油大学地球资源与信息学院； 胜利油田分公司孤岛采油厂；

【摘要】 目的以孤岛油田中一区馆6段为例,进行河流相夹层三维空间分布随机建模研究,以探索夹层分布与剩余油分布关系。方法通过对各种模拟方法进行对比研究和分析,优选序贯指示模拟方法在研究区内建立夹层三维空间分布模型。结果结果检验表明该模型具有较高的准确性和可信性。模型分析显示馆6段夹层分布范围广,其形态、分布规律复杂,厚度变化大,平均厚度0.61 m。延伸距离50¹80 m,分布面积一般为0.01⁰.1 km²。夹层分布密度范围为0.11⁰.63m/m,分布频率范围为0.52¹.24个/m,单夹层厚度分布范围为0.4⁵.5 m,储层非均质性较强。结论10—413,8—309等井区均有夹层连片分布,在这些井区将会有剩余油富集。主力油层馆6³²,6³¹和6⁴¹夹层分布密度和分布频率较小,剩余油饱和度较低,但可采剩余油绝对数量较大;馆6¹、馆6²、馆6⁴²、馆6⁵、馆6⁶夹层分布密度和分布频率值较高,剩余油富集程度较高。更多还原

【Abstract】 Aim Cuantao Formation 6 of Zhongyi district in Gudao Oilfield being taken as an example,fluvial fades interlayer 3D spatial distribution stochastic modeling was studied in order to find the relationship between interlayers distribution and remaining oil distribution.Methods A 3D distribution modeling for interlayer was developed by SIS method.Results The model analysis reveals many interlayers are found in Cuantao 6 Formation,while the distributional regularities and shapes of interlayers are complex and their thickness is varied in different areas.The average thickness is 0.61 m,the extended distance is 50- 180 m,and the distribution area is 0.01-0.1 km².Interlayer distribution density is 0.11-0.63 m/m,distribution frequency is 0.52- 1.24 layers/m,and single interlayer thickness is 0.4- 3.8 m.Cuantao Formation 6 is of high heterogeneity.Conclusion There are many interlayers in 10-413,8-309 well areas,where remaining oil could be rich,Interlayers distribution frequency and distribution density in Cuantao 6³²,Cuantao 6³¹,Cuantao 6⁴¹ formations is low,remaining oil saturation is low too,but the absolute quantity of payable remaining oil is large.The interlayers distribution frequency and distribution density of Cuantao 6¹,Guantao 6²,Cuantao 6⁴²,Cuantao 6⁵ formations are high,so remaining oil will be concentrated in these formations.更多还原