Study And Application Of Reservoir Characteristics Of The Dai Nan Formation In Lian 38 Fault Block Of Gaoyou Sag

In view of the problem of Large change of reservoir in lithologic reservoir,poor physical property,low production of single well and slow effect of water injection in lian 38 fault block,Study on the characteristics of the 38 reservoirs.Using 3D seismic fine interpretation and reservoir prediction method,has been used in drilling data,combined with core,test analysis and production test,for fine reservoir description.The structural form,fracture system,reservoir type and lithology,physical property,structure characteristics,fluid property and distribution law of this area have been corrected.The reservoir geological model is established and the reserves are recalculated.Onthe basis of the study of reservoir characteristics,Analysis of production dynamics,Determine the way of development,The preferred type and type of well pattern,Optimization of well network parameters,Put forward the opinion of well network and optimize the injection and production system,Analysis of economic benefits at last.The main results are as follows:This study is mainly based on the situation of fast lateral change and large lithology in the reservoir,Under the control of the mark layer and the auxiliary sign layer,Using the method of "cycle contrast,classification control",The sand layer group and small layer partition frame and subdivision scheme of the target layer in the study area are established.Through core observation andthe study of the corresponding relationship with the log curve,It points out that the main development of the delta sedimentary system,developed delta two large phase five kinds of micro phase,The distributary channel of the delta is the most developed facies belt of the reservoir sand body.Through the study of the sedimentary characteristics and the development characteristics of sand bodies in this area,The reservoir characteristics of the reservoir in the sedimentary cycle of relative development of sand body are studied by reservoir prediction method.The geometric shape of the reservoir,the distribution of the reservoir physical property in the vertical and horizontal direction and the heterogeneity of the reservoir are clarified.It is determined that the development mode of Lian 38 fault block should be developed by artificial water injection.Well consider the application can improve the economic benefits of large-scale fracturing horizontal well simulation.Comparing different types of well network,the reverse seven point well network in area well network is more suitable.The best pattern of horizontal well well network is the best of staggered well network.Obtaining reasonable well network parameters and developing technical policy,Put forward the opinion of well network deployment and carry out the benefit analysis.