ISSN 1673-8217 CN 41-1388/TE
主管:中国石油化工集团有限公司 主办:中国石油化工股份有限公司河南油田分公司
黄帅博. 2020: 焉耆盆地四十里城地区储层特征及孔隙演化. 石油地质与工程, 34(02): 28-32+38.
引用本文: 黄帅博. 2020: 焉耆盆地四十里城地区储层特征及孔隙演化. 石油地质与工程, 34(02): 28-32+38.
HUANG Shuaibo. 2020: Reservoir characteristics and pore evolution in Sishilicheng area of Yanqi basin. Petroleum Geology and Engineering, 34(02): 28-32+38.
Citation: HUANG Shuaibo. 2020: Reservoir characteristics and pore evolution in Sishilicheng area of Yanqi basin. Petroleum Geology and Engineering, 34(02): 28-32+38.

焉耆盆地四十里城地区储层特征及孔隙演化

Reservoir characteristics and pore evolution in Sishilicheng area of Yanqi basin

  • 摘要: 以焉耆盆地四十里城地区为例,在储层岩石学、成岩作用、物性及孔隙结构研究的基础上,结合盆地的构造–沉积–热演化模式,建立砂岩孔隙度演化的预测模型。结果表明,四十里城地区储层原始孔隙度为35.00%,压实作用导致孔隙度损失24.50%,胶结作用致使孔隙度损失2.80%。在早成岩期结束时,对于孔隙体系连通性好的储层,由于次生孔隙的形成以及被油气充注,最终保存的孔隙度约为12.50%;对于孔隙体系连通性差的储层,由于既没有形成次生孔隙又没有被油气充注,最终孔隙度仅为7.70%。优质储层与沉积相带统计关系表明,优质储层大部分都分布在辫状河三角洲平原分支河道和前缘水下分流河道砂体。

     

    Abstract: By taking Sishilicheng area of Yanqi basin as an example, based on the study of reservoir petrology, diagenesis, physical properties and pore structure, combined with the structural-sedimentary-thermal evolution model of the basin, a prediction model of sandstone porosity evolution is established. The results show that the original porosity of the reservoir in Sishilicheng area is 35.00%, the porosity loss caused by compaction is 24.50%, and the porosity loss caused by cementation is 2.80%. At the end of early diagenetic period, for the reservoir with good connectivity of pore system, the final preserved porosity is about 12.50% due to the formation of secondary pores and oil-gas filling. For the reservoir with poor connectivity of pore system, the final porosity is only 7.70% due to no secondary pores and no oil-gas filling. The statistical relationship between high-quality reservoirs and sedimentary facies shows that most of the high-quality reservoirs are distributed in braided river delta plain branch channel and front underwater distributary channel sand body.

     

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