Application Of Paleogeomorphic Coupling Sand Control Mechanism In Gaoyou And Jinhu Sag

Gaoyou and Jinhu sag is the main sag which are rich-oil in Subei basin.For now,all the oil-gas reservoirs which have been discovered have less study work about covert oil-gas reservoirs that are difficult to explore,among,Dai 1^st is the important one that covert oil-gas reservoirs which need to reach.On account of the diversity and complexity of the sandstone's growth,mechanism of sand dominate is the main bottleneck to restricting the reaching of covert oil-gas reservoirs.To settled for the sandstone distribution and mechanism of sand dominate in two sags,the manipulation in base level provenance system(“beam”)+feed system(“valley”)+slope-break system(“slope”),which are three palaeogeomorphology characteristic parameter Effective Coupling prognosis techniques of land facies complex fault depression basin covert oil-gas reservoirs sandstone is appled.Here is the cognition and result:1.Using tools of quantification analysing detrital component,trace element and rare-earth element,the result is the Dai 1^stepoch structural setting of Gaoyou sunken is active mainland margin,epoch structural setting of Jinhu sunken is mainland arc of nearing active mainland margin.Two sunken are both based on felsite and recycling precipitate.The provenance of Gaoyou sag mainly come from Tongyang uplift,Wupu low bulge,Lingtangqiao low bulge bulge and Zheduo low bulge bulge;the provenance of Jinhu sag mainly come from Tianchang bulge,Lingtangqiao low bulge bulge,Liupu low bulge bulge,Zhangbaling uplift and Jianhu uplift.2.Using the seismic cross section of Gaoyou and Jinhu sag to discern the deposit stage of Dai 1^st,the northern ramp region of Gaoyou sag and Jinhu sag both developed break girdle,lower cutting river valley and trough.There are two fracture regulate belts belong to Zhenwu and Wupu in Gaoyou sag,fracture regulate belt belong to Shigang in Jinhu sag.3.According to the display result of precipitation facie profile,the southern cliff section of Gaoyou sag and Jinhu sag in Dai 1^st both developing bound deltaic fan and nearshore underwater shock fan;the southern cliff section of Gaoyou sag developing meandering river delta shoreline,the southern cliff section of Jinhu sag developing anastomosed stream delta shoreline.4.A ccording to the three palaeogeomorphology core characteristic parameter to coupled factorization the result,uniting the precipitation facie profile,the result is that Zhenwu,Caozhuang and the south of Fumin in Gaoyou sag and surrounding fracture belt in Jinhu sag in Dai 1^st have great deploy of“beam”+“canal”+“slope”that can be prospected as the important area in next move.5.Comparing the couple result of the three palaeogeomorphology core characteristic parameter of Gaoyou and Jinhu sag,we know that the coupling effect of palaeogeomorphology core characteristic parameter in Jinhu sag has strongly inherited,the affection of vegetal level belong to sandstone is mainly provenance duration provide.The coupling effect of palaeogeomorphology core characteristic parameter in Gaoyou sag is a process that turn good from bad,the affection of vegetal level belong to sandstone is provenance,valley of canal and break in grade,three of them are all turning good.This result of research has offered technical support of beneficial sandstone of two sags,there are actual meanings for Jiangsu oil field sequent exploratory development and produce work.Figure 83;Table 20;Reference 45...