砂砾岩储集体成岩差异性分析——以玛北斜坡带三叠系百口泉组为例  

Differentiation of diagenesis in sandy conglomerate reservoir： A case study from the Triassic Baikouquan Formation in Mahu slope area, Junggar Basin

作　　者：韩登林[1,2] 李雷[1] 连丽霞 朱亚婷[4] 李维锋[1,2] 袁晓光[5] 张双源 

机构地区：[1]长江大学油气资源与勘探技术教育部重点实验室,武汉430100 [2]长江大学地球科学学院,武汉430100 [3]中国石油新疆油田分公司实验检测研究院,新疆克拉玛依834000 [4]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000 [5]中国地质大学(北京),北京100083

出　　处：《地质科学》2017年第2期428-439,共12页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：中国石油科技创新基金项目（编号：2016D-5007-0104）、国家自然科学基金项目（编号：41302094）、长江青年基金项目（编号：2015cqr08）和长江青年科技创新团队基金项目（编号：2015cqt04）资助.

摘　　要：凭借着高产油气流，玛湖凹陷北斜坡带百口泉组砂砾岩储层成为近年来颇受储层沉积学家们关注的热点区域。层段内砂砾岩储层储集物性表现出明显的差异性，其控制机理一直尚未明确。本文按照流体成因差异，将层段内岩石相划分为4种类型：牵引流成因的砂砾岩相、含砾砂岩相、砂岩相，以及重力流成因的砂砾岩相。在不断埋深过程中，重力流砂砾岩相的压实进程远远早于且明显强于牵引流砂砾岩相。而随后持续深埋过程中，重力流砂砾岩相孔隙度不再明显降低，渗透率却呈现明显增加，表明重力流砂砾岩相内的微裂缝开始发育。上述压实效应的差异造成了在储集空间上，牵引流砂砾岩相以原生粒间孔为主要类型，而重力流砂砾岩相则以粒内溶孔和微裂缝为主要类型。最终在宏观储集物性上，牵引流砂砾岩相储集性能明显优于重力流砂砾岩相，成为研究层段内有效的储集体。The Triassic Baikouquan Formation in Mahu slope area, Junggar Basin, attracted much attention of the reservoir sedimentologist. The difference of physical property in the sandy conglomerate reservoir is obvious, but its control mechanism has not been clear. According to the difference of fluid property, the rock facies are divided into four types： Traction current sandy conglomerate facies （TCSCF）, pebbly sandstone facies, sandstone facies and gravity flow sandy conglomerate facies （GFSCF）. During burial, compaction effect in the GFSCF is sooner and stronger than that in the TCSCF. And in the process of continuous deep burial, porosity in the GFSCF is not decreasing significantly, but the permeability begins increasing. These show there are micro-cracks beginning to produce in GFSCF. The difference of the compaction effect cause that type of reservoir space in the TCSCF is mainly dominated by primary intergranular pores, and secondary pores and micro-cracks is the main reservoir space in the GFSCF. Finally, the physical property of the TCSCF is obviously better than that of the GFSCF, the former is the effective reservoir in the formation.

关 键 词：玛湖凹陷 百口泉组 砂砾岩 成岩作用 压实作用 

分 类 号：P618.13[天文地球—矿床学]