Fuzzy mathematics-based reservoir evaluation in the southeastern Pre-Caspian Basin

被引：0

作者：

Zhu, Wei ^{[1
]}

Gu, Shaoqiu ^{[1
]}

Cao, Zijian ^{[1
]}

Zhang, Guoyi ^{[2
]}

机构：

[1] School of Civil Engineering, Hunan University of Science and Technology, Xiangtan

[2] Exploration and Production Research Institute, Jilin Oilfield, PetroChina, Songyuan

来源：

Oil and Gas Geology | 2013年 / 34卷 / 03期

关键词：

Fuzzy mathematics; Jurassic; Pre-Caspian Basin; Reservoir evaluation; Triassic;

D O I：

10.11743/ogg20130311

中图分类号：

学科分类号：

摘要：

Kazakhstan Pre-Caspian Basin is a craton marginal foreland basin located in the southeast edge of East European Platform and is one of the main petroliferous regions in Caspian Sea. Terrigenous clastic rocks were widely developed during the Triassic-Jurassic in southeastern Pre-Caspian Basin. The reservoirs are dominated by sandstone and siltstone of shallow marine shelf facies, shoals facies and delta facies. The poroperm characteristics of the reservoirs are medium porosity and moderate permeability as a whole. The well logging interpretation shows that the reservoirs physical properties and pore texture are of strong heterogeneity. Based on fuzzy mathematics evaluation, this paper optimized the geological factors through multiple regression analysis and smallest secondary multiplication, recognized porosity, permeability, oil saturation and sand thickness as the key geological factors, and established fuzzy mathematical model. The new model overcomes the complexity and subjectivity caused by various uncertainties that are common in traditional reservoir evaluation. Multiple model comparison reveals that the favorable reservoirs in this area are J2II and TII.

引用

页码：357 / 362

页数：5

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