北部湾盆地白莲构造流一段储层非均质性研究

发布时间：2019-02-16 21:12

【摘要】：储层非均质性是注水开发效果的重要影响因素之一,为了指导白莲地区先导性水驱实验,拟开展北部湾盆地白莲构造流一段储层非均质性研究,本文研究了白莲地区流一段储层本区的四性特征及其相互关系,建立了孔渗饱泥测井解释模型,并通过建立的模型进行了这四个参数的计算;建立了储层流体判别图版及储层测井解释标准从而确定了储层分布特征;在测井解释的基础上对研究区的层内、层间非均质性以及隔夹层分布状况进行了研究。结果表明本区储层以中孔-低渗为主;储层流体判别图版精度为80%;修正了一些一次解释的结论,把测井解释结果和试油结论作对比,表明储层流体判别符合率为89.2%;储层南东方向比较厚,北西方向比较薄;层内非均质程度主要为中-强,正韵律模式普遍分布在各个不同层段的水下分流河道微相中;复合正韵律占比重较大,在水下分流河道发育的砂层组内比较常见;反韵律模式主要出现在河口坝砂体和间湾中,占比小;复合反正韵律和复合正反韵律主要发育在水下分流河道中;0-1砂层组的层内非均质性显示为弱;0-2、I-3、I-4、IV-9砂层组层内非均质性显示为中等;II-5、II-6、III-7、III-8砂层组层内非均质性强。层间非均质程度主要为中-强;0-1、I-3、I-4、II-5砂层组层间非均质性弱,0-2、II-6砂层组层间非均质性中等,III-7、III-8、IV-9砂层组层间非均质性强。夹层在0-2最发育,厚度为1-3米;隔层在0-2、I-4、II-5、II-6、III-7砂层组较发育,厚度大于5米。非均质性是远离物源的方向非均质性强,离物源越近非均质性越弱。建议层间非均质性较强的储层分层注水。
[Abstract]:Reservoir heterogeneity is one of the important influencing factors of water injection development. In order to guide the pilot water drive experiment in Bailian area, a study on reservoir heterogeneity of Bailian structural flow first member in Beibu Gulf Basin is proposed. In this paper, the four characteristics and their relationships of the reservoir area of the first member of flow in Bailian area are studied, the interpretation model of pore and permeability saturated mud logging is established, and the calculation of these four parameters is carried out through the established model. The reservoir fluid pattern and logging interpretation criteria are established to determine the reservoir distribution characteristics, and the distribution of interlayer heterogeneity and interlayer distribution in the study area are studied on the basis of log interpretation. The results show that the reservoir in this area is mainly medium porosity and low permeability, the accuracy of reservoir fluid discrimination chart is 80, some conclusions of one interpretation are revised, and the results of log interpretation and oil test are compared, which shows that the coincidence rate of reservoir fluid discrimination is 89. 2%. The reservoir is thicker in the south east direction and thinner in the north west direction, the heterogeneity in the layer is mainly medium to strong, and the positive rhythm pattern is generally distributed in the microfacies of the underwater distributary channel in different layers. The compound positive rhythm accounts for a large proportion and is more common in the sand formation developed in the underwater distributary channel, and the anti-rhythm pattern mainly appears in the sand body and the interbay of the estuarine dam, and the proportion is small. Compound back rhythm and compound positive and negative rhythm are mainly developed in underwater distributary channel, the heterogeneity of 0-1 sand formation is weak, the heterogeneity of 0-2 I-3 I-4 + IV-9 sand formation is moderate, the heterogeneity of 0-1 sand formation is weak, and the heterogeneity of 0-2 I-3 I-4 + IV-9 sand formation is moderate. The heterogeneity of II-5,II-6,III-7,III-8 sand formation is strong. The degree of interlayer heterogeneity was mainly medium to strong; The interlaminar heterogeneity of 0-1 I-3 + I-4 + II-5 sand formation is weak, the interlayer heterogeneity of 0-2 ~ (II-6) sand formation is moderate, and the interlayer heterogeneity of III-7,III-8,IV-9 sand formation is strong. The intercalation is the most developed in 0-2 with a thickness of 1-3 m, and the thickness of the interlayer is more than 5 m in the 0-2 I-4 + II-5 / II-6 / III-7 sand formation. Heterogeneity is the direction of strong heterogeneity away from the source, the closer the heterogeneity is, the weaker the heterogeneity is. It is suggested that stratified water injection in reservoirs with strong heterogeneity between layers should be carried out.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TE357.6

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