| The work area of this study is Hanliu fault zone in Gaoyou sag,there are many problems about the structure interpretation in the work area which are the fault system are complexed,structure is broken,and the finding of traps is hard.First we use great mass of data to correlate the strata,and distinguished the rich oil system(E1f2+1,E2d1)and less finding system?E2s,K2t?.On the base of the fine stratigraphic correlation,we do some research about the structure,faults,and favorable traps.And we do many tentative studies about the structure interpretation and reservoir prediction in the complex structural area.After the research about the traps optimization,the main results of the research are as follows:1.We do the different fine stratigraphic correlation in the formation of E1f2+1,E2d1 and E2s,K2t.About 61 wells were correlated,1125 samples were analyzed,and 260m well core in21 wells were described.And we do some research about the distribution of the strata,sedimentary facies,reservoir physical property,and the factors of them.The strata K2t1developed the braided river delta,E1f1 developed the shallow water delta,and E2s1 developed the fluvial facies and delta.The Hanliu fault affected the K2t,E1f weakly,and affected the E2s seriously.2.We do the 3D seismic interpretation on the 8 sets of data,the total area is 1400 Km2,and formed the Identification technique about subtle fault,igneous rock,structural trap in the formation of K2t,E1f,subtle trap in E2d and E2s.Finally,we found 89 structural traps,6lithologic traps,the total area is 53.2 Km2,and predicted resource is 5828×104 t.3.On the base of the research about the distribution rule of the traps in the Hanliu fault zone,and after the evaluation of traps,4 wells were deployed and 3 wells of them get the industrial oil flow,1well of them was low output oil and water layer.In this research,we found the controlled reserves 163×104 t,the predicted reserves 502×104 t. |
PDF Full Text Request