石油勘探与开发2014，Vol.41Issue(2)：158-167,10.DOI:10.11698/PED.2014.02.04
超深层裂缝-孔隙型致密砂岩储集层表征与评价--以库车前陆盆地克拉苏构造带白垩系巴什基奇克组为例
Characterization and evaluation of ultra-deep fracture-pore tight sandstone reservoirs:A case study of Cretaceous Bashijiqike Formation in Kelasu tectonic zone in Kuqa foreland basin, Tarim, NW China
摘要
Abstract
Taking the Cretaceous Basijiqike Formation sandstone reservoirs in the Kuqa foreland basin as an example, this paper studies the characterization and evaluation methods of fracture-pore (fracture-primary pore and fracture-dissolution pore) ultra-deep reservoirs under the double effects of diagenetic compaction and tectonic compression. Buried over 6 000 m deep, the sandstone reservoirs of Basijiqike Formation are ultra-deep reservoirs, aimed at which, an ultra-deep fracture tight sandstone reservoir characterization technique is built, which integrates macroscopic microfacies-lithofacies identification, centimeter-micron scale fracture description, micron pore depiction and nano-throat characterization. The research indicates that the effective reservoir space consists of structural fractures, micron pores and nano-pore throats. The main radius of matrix pores is 2-100 μm, that of matrix throats is 10-500 nm and the main area of fracture opening degree is 100-300μm. Effective reservoirs are mainly controlled by microfacies-lithofacies, tectonic compression and erosion. Relatively high-quality reservoir spaces consist of fractures, residual intergranular pores and dissolution pores, developed in the stacked area of weak compacted structure zone and underwater distributary channel zone. Favourable reservoirs over 7 000 m deep can be in continuous band distribution, there still could be effective reservoirs in formations over 8 000 m deep.关键词
库车前陆盆地/巴什基奇克组/超深层/裂缝/溶蚀孔隙/原生孔隙/储集层表征Key words
Kuqa foreland basin/Bashijiqike Formation/ultra-deep formation/fracture/dissolution pore/primary pore/reservoir characterization分类
能源科技引用本文复制引用
张惠良,张荣虎,杨海军,寿建峰,王俊鹏,刘春,陈戈..超深层裂缝-孔隙型致密砂岩储集层表征与评价--以库车前陆盆地克拉苏构造带白垩系巴什基奇克组为例[J].石油勘探与开发,2014,41(2):158-167,10.基金项目
国家重点基础研究发展计划(973)项目(2011CB201106) （973）
中国石油科技重大专项(2010E-2100) （2010E-2100）
