石油勘探与开发2017，Vol.44Issue(3)：359-369,11.DOI:10.11698/PED.2017.03.05
深层储集层长石溶蚀增孔的物理模拟与定量计算
Physical simulation and quantitative calculation of increased feldspar dissolution pores in deep reservoirs
摘要
Abstract
The physical simulation of diagenesis was conducted for the Cretaceous Bashijiqike Formation deep sandstone reservoir in Kelasu structural belt of Kuqa Depression,Tarim Basin,and the dissolution rate and increased dissolution pores of feldspar matrix grains in such reservoirs were quantitatively calculated in the process from long-term shallow burial in early stage to quick deep burial in late stage.Through the field emission large-area SEM analysis,the dissolution rate and increased dissolution pores of feldspar matrix grains in core samples taken from Dabei and Keshen areas were quantitatively calculated.After the experimental data and the actual core data were cross-checked,the evolution model was established for increased feldspar dissolution pores in deep continental reservoirs with high content of feldspar matrix grains.According to the calculation results,the maximum increased feldspar dissolution pores in Keshen area during the process from long-term shallow burial in early stage to quick deep burial in late stage is by 0.86％-2.05％.The simulated sandstone reservoir with burial depth of more than 7 000 m reveals a larger quantity of increased feldspar dissolution pores,with the absolute error value of 0.23％ after calibration.In Dabei area,calcite is the primary contributor to secondary dissolution pores,followed by feldspar.Quantitative calculation shows the maximum increased feldspar dissolution pores in Dabei area to be by 0.62％-1.48％.Similarly,the simulated sandstone reservoir with burial depth of more than 7 000 m reveals a larger quantity of increased feldsPar dissolution pores,with the absolute error value of 0.15％ after calibration.There are two causes of the experiment errors:One cause is that the simulation experiment uses ideal conditions and the simulation reservoirs are homogeneous;Another one is that deep reservoirs have strong heterogeneity and there are big differences in the dissolution within different areas.关键词
库车坳陷/深层储集层/长石溶蚀/溶蚀增孔/成岩物理模拟Key words
Kuqa Depression/deep reservoir/feldspar dissolution/increased dissolution pore/physical simulation of diagenesis分类
能源科技引用本文复制引用
高志勇,冯佳睿,崔京钢,王晓琦,周川闽,石雨昕..深层储集层长石溶蚀增孔的物理模拟与定量计算[J].石油勘探与开发,2017,44(3):359-369,11.基金项目
国家科技重大专项“前陆冲断带及复杂构造区地质演化过程、深层结构与储集层特征”(2016ZX05003-001) （2016ZX05003-001）
中国石油天然气股份有限公司课题(2014E-3209 （）
2016B-0502 （）
2016B-0302) （）
