Exploration Target Optimization Of Upper-third Member Of Shahejie Formation Of Gentle Slope In Shulu Sag

In this paper,taking upper-third member of Shahejie Formation in the slope belt of Shulu sag as an example,sedimentary facies,the relationship between hydrocarbon accumulation tectonic activity,and analyzes exploration targets optimization are primarily studied through logging data,seismic data and geology.(1)Based on analyses of single well facies and seismic facies,combining with the sand ratio and seismic attributes,the sedimentary facies of the upper-third member of Shahejie formation are studied.The research shows that braided river delta facies are developed in the slope belt,and which are chiefly distributed in tectonic belt of Nanxiaochen and Xicaogu.And the source of which are from the western bump of NingJin.(2)A study on reservoir prediction of three sand groups of the upper-third member of Shahejie Formation by utilizing RMS amplitude show that the distribution of favorable reservoir ofⅠsand group is in structural belt of Xicaogu,western of Taijiazhuang and Xinji,the distribution of favorable reservoir of Ⅱsand group is in structural belt of Xicaogu,the distribution of favorable reservoir of Ⅲ sand group is in tectonic belt of Xicaogu,western of Taijiazhuang,Xinji and Nanxiaochen.(3)The tertiary faults whose strike are in the NE-NEE direction of middle part of slope,together with the secondary fault compose fault combination style of fault terrace,Y shape and the Y shape,graben and horst,flower structure and feathery structure,which form different trap types in the central structural belt.The tertiary faults which are off to the hydrocarbon source rocks of the lower-third member of Shahejie Formation is the source-related faults,which can provide the pathway for the oil-gas migration from hydrocarbon source rocks to traps of the upper-third member of Shahejie formation as a superior transportation system,and forming down generated and up stored reservoirs.And the sealing property fault can be used as oil and gas gathering place,forming fault block(fault nose)reservoirs.(4)According to the analysis on the reservoir forming conditions of tectonic belts in the slope belt,it is forecasted that the favorable tectonic belts for oil and gas gathering are distributed in the Xicaogu and western of Taijiazhuang,and optimizing two exploration targets which are Jin 83 x and Jin 62.