CAJ | 학술논문

准噶尔盆地玛湖西斜坡区三叠系百口泉组储层为扇三角洲致密砂砾岩，具有低孔、低渗、储层薄的特征，水下中等孔隙度的灰绿色砂砾岩为优质储层。由于地震资料主频低（25～30 Hz），储层薄（10 m左右），而且优质储层与致密层阻抗叠置，目前常用的叠后波阻抗反演、叠前同时反演等方法都满足不了该地区优质薄储层预测的要求。笔者基于取芯、测井、试油等资料开展岩石物理分析，利用纵波阻抗和纵横波速度比建立岩石物理图版，确定该区的优质储层参数特征。在此基础上，开展叠前地质统计学反演，综合叠前同时反演与地质统计学反演技术的优点，实现砂砾岩优质薄储层的预测。反演结果表明，叠前地质统计学反演结果可以明显提高储层纵向预测的分辨率，较好地解决该地区致密砂砾岩优质薄储层预测的问题，为该区下步勘探开发提供依据。
준갈이분지마호서사파구삼첩계백구천조저층위선삼각주치밀사력암，구유저공、저삼、저층박적특정，수하중등공극도적회록색사력암위우질저층。유우지진자료주빈저（25～30 Hz），저층박（10 m좌우），이차우질저층여치밀층조항첩치，목전상용적첩후파조항반연、첩전동시반연등방법도만족불료해지구우질박저층예측적요구。필자기우취심、측정、시유등자료개전암석물리분석，이용종파조항화종횡파속도비건립암석물리도판，학정해구적우질저층삼수특정。재차기출상，개전첩전지질통계학반연，종합첩전동시반연여지질통계학반연기술적우점，실현사력암우질박저층적예측。반연결과표명，첩전지질통계학반연결과가이명현제고저층종향예측적분변솔，교호지해결해지구치밀사력암우질박저층예측적문제，위해구하보감탐개발제공의거。
The reservoir of Triassic Baikouquan Formation on Mahu slope in Junggar Basin is characterized by low porosity,low permea?bility,and thin tight conglomerate,with only the subaqueous grayish green conglomerate with medium porosity being the high?quality res?ervoir. Because central frequency of seismic data is low (25~30 Hz),the thickness of the thin layer is about 10 m,and the impedances of high?quality reservoir and tight layers are overlapped in these reservoirs,the commonly used post?stack impedance inversion and pre?stack simultaneous inversion are not very effective in prediction of high?quality and thin reservoirs.In this paper,based on core,logging and test data,the authors carried out the petrophysical analysis and established the petrophysical chart by using P?impedance and vp/vs , and then identified the parameter of the effective reservoir of this area.Finally,the authors conducted the pre?stack geo?statistic inversion that combines the advantages of the simultaneous inversion and geo?statistics inversion,and predicted the high?quality and thin conglom?erate reservoir.The result of inversion indicates that the pre?stack geo?statistics inversion can effectively identify the high?quality and thin conglomerate reservoir and provide reliable basis for further exploration and development.