同铁构造嘉陵江组储层裂缝非线性预测与分析研究

NON-LINEAR PREDICTION AND ANALYSIS ON RESERVOIR FRACT-URE FOR JIALINGJIANG FORMATION OF TONGTIE STRUCTURE

基于储层裂缝系统具有非线性特征,应用三种直接与裂缝有关的非线性参数对同铁构造嘉陵江组嘉二1储层裂缝进行了非线性预测与评价。嘉陵江组嘉二1储层裂缝空间展布特征是成区带分布,沿构造轴向和断层走向从北到南分为两带一区,并分为四级,这种裂缝展布特征与构造特征、断层及地应力分布密切相关。同铁构造嘉陵江组嘉二1储层有效裂缝富集区与天然气富集区具有对应关系,并为钻探所证实,为同铁构造嘉陵江组嘉二1气藏的开发提供了科学依据,具有重大的经济意义。

Based on fracture system of reservoir with non-linear characteristics,non-linear prediction and evaluation of reservoir fracture were applied to Jialingjiang Formation T_1j_2~1 of Tongtie structure by using three non-linear parameters which directly correlate with reservoir fracture. The fractured spatial distribution of T_1j_2~1 reservoir was divided into two fractured zones which followed the trend of tectonic axes and faults.These two zones could be subdivided into 4 subzones related to the faults,stress distribution.It was confirmed by drilling that effective fracture abundance zone of T_1j_2~1 reservoir of Tongtie structure was closely related with gas abundance area.This research provided evidence for T_1j_2~1 gas reservoir exploitation in Tongtie structure and was of economic significance.