Differential Development Characteristics and Exploration Significance of Sand-bodies in Lower Member of Minghuazhen Formation in Eastern Section of Bonan Low Uplift
The lower member of Minghuazhen Formation in the eastern section of Bonan low uplift is main exploration layer,but the dis-tribution law of sand-bodies is not clear,which restricts the effectiveness of oil and gas exploration.The logging data while-drilling,log-ging data,analytical test data and seismic data are comprehensively studied.The results show that there are one medium-term cycle(corresponding to lowstand system tract,transgressive system tract and highstand system tract)and five short-term cycles(correspond-ing to five oil layer groups)in the lower member of Minghuazhen Formation in the eastern section of Bonan low uplift.The sand-rich reservoirs are mainly developed in the V oil layer group of the lowstand system tract and the II oil layer group of the highstand system tract.The distribution of sand bodies in the V oil layer group of the lower member of Minghuazhen formation is mainly affected by the eastern source system,channel-type sand bodies and sheet-type sand bodies are developed.The distribution of sand bodies in the II oil layer group is mainly affected by the western source system,mainly developing channel-type sand bodies,estuary dam-type sand bodies and sheet-type sand bodies.It is proposed that the key exploration area of the V oil layer group is in the northeast,and the key explora-tion area of the II oil layer group is in the northwest.
Bonan low upliftshort term cycledifferential sand-body developmentchannel-type sand-bodyestuary dam-type sand-body
万方数据
维普
