2011•Journal of Oil and Gas TechnologyRequires access
Sedimentary Facies of K2t1 Reservoir in the South of Hai'an Depression
Tang Zaiqiu, Yu Yongsheng, Huang Fei, BI Jian-fu, Zhang Yunfeng
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Abstract
The characteristics of lithology,sedimentary structure and grain sizes of K2t1 sandstone reservoirs of Hai'an Depression were described in order to clarify the sedimentary facies of K2t1 Reservoir in the south of Hai'an Depression on the basis of the core facies analysis.The rules of plane distribution of sedimentary facies were analyzed.It was determined that the target zones of the studied area were mainly of delta sedimentary systems and the delta front subfacies.The microfacies include the underwater distributary channel,channel mouth bar,bay beside distributary channel,distal bar,sand sheet and underwater natural levee,in which the underwater distributary channel,channel mouth bar and distal bar are the advantageous facies belts.The planar graphs of sedimentary facies are drawn,it provides a foundation for reservoir prediction.