Exploration Target Evaluation And Well Placement Of Es3～4 In The Eastern Gaoersan Exploration Area Of The Western Sag Of Liaohe Basin

This article is mainly aimed at the problem of Gaoersan exploration area enter the later period and the shortage reserve replacement, looking for favorable traps in eastern Gaoersan exploration area to carry out the research on reservoir evaluation and well placement. With the integration of seismic data, logging data, and old oil well production performance, the combination of comprehensive utilization of 3 d seismic data structure interpretation and reservoir prediction technology for research of local structure, reservoir to implement. The geologic structure determines the main developmental fracture of two groups, the north east to Taian ~ Dawa and Songjia~ Chenjia for two long-term growth in the control of depositional fault, nearly east-west fault block effect, and the two groups of faults in the formation of traps and hydrocarbon distribution is of great significance. The sedimentary determines the Shahejie four paragraphs mainly developed fan delta- lake depositional systems, source from the short axis; Sand three sedimentary period work area of the north and west development is given priority to with glutenite fan delta- lake sedimentary system, the deep development of work area in southern and eastern nearshore subaqueous fan deposits. There are two main types of oil-gas reservoir, one is structural deposit,the other is structural lithologic composite, the braid canal in mid of coastal subsea apron and fan delta front underwater channel sand body is the most favorable oil bearing reservoir in this area. In the structure, sedimentary reservoir and reservoir based on comprehensive study, in the G3-6-24 wellblock provide two favorable traps, advise the location two wells; G105 wellblock provide one favorable trap, suggest location one well; G81 wellblock provide ong favorable trap, suggest location one well.Through the trap evaluation and risk analysis, it is suggested that high priority to implement the G3-6-24 wellblock suggestion the first well and G105 wellblock suggest the third well.