Lithologic Reservoirs ›› 2021, Vol. 33 ›› Issue (2): 59-69.doi: 10.12108/yxyqc.20210207

• PETROLEUM GEOLOGY • Previous Articles     Next Articles

Heterogeneity characteristics of tight reservoir of lower submember of He 8 member in Su 49 block,Sulige gas field

LONG Shengfang, WANG Yushan, LI Guoliang, DUAN Chuanli, SHAO Yingming, HE Yongmei, CHEN Lingyun, JIAO Xu   

  1. Oil and Gas Cooperative Development Branch, CNPC Bohai Drilling Engineering Co., Ltd., Tianjin 300457, China
  • Received:2020-09-28 Revised:2020-10-28 Online:2021-04-01 Published:2021-03-31

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Abstract: Typical tight sandstone reservoirs are developed in lower submember of He 8 member in Su 49 block, Sulige gas field. The gas-water distribution rules are complex and the gas production of single well varies greatly. In order to clarify the influence of reservoir heterogeneity on gas reservoir distribution and gas well productivity, and to achieve efficient development of gas field,based on fine stratigraphic division and comparison,the systematic research on reservoir and plane heterogeneity was carried out by making full use of the data of drilling and logging,testing analysis and gas well production. The results show that:(1) The heterogeneity of lower submember of He 8 member in the study area is relatively strong. The reservoir physical properties of lower sand group 2 of He 8 member are generally poor,there are many interlayers in the layer,and the vertical and plane connectivity of sand body is poor,and its heterogeneity is stronger than that of lower sand group 1 of He 8 member.(2) On the plane,the interlayer and plane heterogeneity in the west of the study area are strong,the sand body connectivity of lower sand group 1 of He 8 member in Su 176 area and nearby is good,and there are relatively high porosity and permeability zones with less interlayer,which is favorable for natural gas enrichment and accumulation.(3) Reservoir heterogeneity has obvious influences on gas-bearing property,macro distribution of gas reservoir and development effect. Relatively good reservoir physical property,connectivity and less interlayer are the key to gas enrichment and high production. The results can provide reference for well location deployment and later development in the study area and similar areas.

Key words: interlayer, tight sandstone reservoir, heterogeneity, lower submember of He 8 member, Sulige gas field

CLC Number: 

  • TE121.1
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