龙女寺—广安地区寒武系洗象池组储层特征及有利区预测
发布时间：2018-11-17 13:12
【摘要】：洗象池组是四川盆地油气下古生界～震旦勘探领域的重要层位之一,龙女寺-广安地区洗象池组碳酸盐岩具有和龙王庙组相似的岩性条件,且从钻探效果来看,油气显示良好,具有可观的勘探前景,因此深入研究其储层特征具有重要意义。 本次研究旨在结合前人研究成果,运用矿物岩石学、沉积学、石油地质学、地球化学、储层评价的相关理论及方法,对龙女寺～广安地区洗象池组地层的划分,地层分布沉积相类型、颗粒滩展布特征、储集岩、孔隙及物性等基本特征及储层发育主控因素进行研究。 通过钻井、录井、测井及岩心、地震等大量资料的综合分析,认为洗象池组自下而上可分为三个段,且在研究区的西北部洗象池组的地层受到了剥蚀；洗象池组为局限台地相,主要发育颗粒滩、台坪、泻湖亚相。识别出砂屑云岩和晶粒云岩是研究区洗象池组主要的储集岩,主要孔隙类型为粒间溶孔、晶间溶孔及晶间孔,而“针孔层”主要发育于砂屑云岩中。储层的物性特征表现为低孔低渗、局部存在高孔高渗的特点。储层受沉积相和成岩作用的共同影响,裂缝也有效的改善了储层渗流能。储层纵向上主要分布在洗二段、洗三段、平面上主要分布于龙女寺东南～广安地区。 综合沉积相、储层分布及其他因素建立储层评价标准,划分出Ⅰ、Ⅱ二级有利勘探区,对有利勘探区进行预测,龙女寺构造东南区为Ⅰ级有利勘探区,广安～合川一线为Ⅱ级有利勘探区。
[Abstract]:Xixiangchi formation is one of the important strata in the exploration field of Lower Paleozoic ~ Sinian in Sichuan Basin. The carbonate rocks of Xiewangchi formation in Longnushi-Guangan area have lithologic conditions similar to those of Longwangmiao formation, and the oil and gas show well in terms of drilling results. Therefore, it is of great significance to study the reservoir characteristics in depth. The purpose of this study is to use the theories and methods of mineral petrology, sedimentology, petroleum geology, geochemistry and reservoir evaluation to divide the strata of the Xianghuchi formation in Longnusi ~ Guangan area. The distribution of sedimentary facies, the distribution characteristics of grain-flat, reservoir rock, porosity and physical properties, and the main factors controlling reservoir development are studied. Based on the comprehensive analysis of drilling, logging, core and seismic data, it is concluded that the wash pool formation can be divided into three sections from the bottom to the top, and the formation of the Xiwangchi formation in the northwestern part of the study area has been eroded. The Xixiangchi formation is a restricted platform facies, mainly developed granular beach, platform, lagoon subfacies. It is recognized that sandclastic dolomite and grain dolomite are the main reservoir rocks of the Xianghuchi formation in the study area. The main pore types are intergranular dissolved pore, intergranular dissolved pore and intergranular pore, while the "pinhole layer" is mainly developed in sandstone dolomite. The physical properties of reservoirs are characterized by low porosity and low permeability and high porosity and high permeability. The reservoir is influenced by sedimentary facies and diagenesis, and fractures also improve reservoir percolation energy effectively. The reservoir is mainly distributed longitudinally in the second stage and the third section, and is mainly distributed in the southeast of Longnusi to Guangan area. Synthetical sedimentary facies, reservoir distribution and other factors, the reservoir evaluation criteria are established, and the favorable exploration areas 鈪，
本文编号：2337914
[Abstract]:Xixiangchi formation is one of the important strata in the exploration field of Lower Paleozoic ~ Sinian in Sichuan Basin. The carbonate rocks of Xiewangchi formation in Longnushi-Guangan area have lithologic conditions similar to those of Longwangmiao formation, and the oil and gas show well in terms of drilling results. Therefore, it is of great significance to study the reservoir characteristics in depth. The purpose of this study is to use the theories and methods of mineral petrology, sedimentology, petroleum geology, geochemistry and reservoir evaluation to divide the strata of the Xianghuchi formation in Longnusi ~ Guangan area. The distribution of sedimentary facies, the distribution characteristics of grain-flat, reservoir rock, porosity and physical properties, and the main factors controlling reservoir development are studied. Based on the comprehensive analysis of drilling, logging, core and seismic data, it is concluded that the wash pool formation can be divided into three sections from the bottom to the top, and the formation of the Xiwangchi formation in the northwestern part of the study area has been eroded. The Xixiangchi formation is a restricted platform facies, mainly developed granular beach, platform, lagoon subfacies. It is recognized that sandclastic dolomite and grain dolomite are the main reservoir rocks of the Xianghuchi formation in the study area. The main pore types are intergranular dissolved pore, intergranular dissolved pore and intergranular pore, while the "pinhole layer" is mainly developed in sandstone dolomite. The physical properties of reservoirs are characterized by low porosity and low permeability and high porosity and high permeability. The reservoir is influenced by sedimentary facies and diagenesis, and fractures also improve reservoir percolation energy effectively. The reservoir is mainly distributed longitudinally in the second stage and the third section, and is mainly distributed in the southeast of Longnusi to Guangan area. Synthetical sedimentary facies, reservoir distribution and other factors, the reservoir evaluation criteria are established, and the favorable exploration areas 鈪，
本文编号：2337914
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