Reservoir Architecture Analysis And Fine Structure Interpretation Of Complex Fault Block

The study area involoved is the 660 fault block,and the target section is the lower section of the Shahejie Formation of Es3-Es4.This paper makes use of the existing research results,combined with logging,drilling,seismic and geological data,etc,to research strata classification and correlation,to analyze the reservoir sedimentary facies of the study area,to research the interface identification of the reservoir structure and the division of the reservoir Architecture elements,and the structural characteristics in the study area.Thus,there is further understanding of the strata,sedimentary facies in the study area,the configuration and structural features.There are 3-5 sand groups in the lower part of Es3 in Bin660 fault block,while the upper part of Es4 can be divided into 1-2 sand group.The typical lithology of the study area is basically the same,and the electrical characteristics are relatively stable.Each group of Es3 can be divided into four small layer,while each group of Es4 can be divided into three small layer.The thickness of sand in northwest near the source is thicker and it is thinner in the northeast.The sedimentary facies sign and sedimentary distribution characteristics of the 660 fault block show typical fan delta front sediments,include distributary channel,bar,far sand dam,sand sheet and underwater distributary channel,etc.From Es4 to Es3,it is a retreat process,the water is deeper,the sand body development is reduced,and the thickness is thinner.A large number of predecessors have shown that the fan delta front subfacies are the main research object.And,the interface of the estuary dam is divided into 3-5 grades,which is divided into three types of estuary dam structure,and the most important one is a single estuary dam Architecture.By establishing the correspondence relationship between logging and seismic response,this paper makes a fine study on the constitutive element unit,and further subdivides the composite sand body of Shahejie Formation,Es41,to subdivide it into the single sand body level and to establish the seismic interpretation model of reservoir Architecture.Based on the data of the high precision seismic data and the wellbore,the static data and the dynamic data are combined with the coherent body technology,and the fine section of the Bin660 block is explained in detail.Overall,the Bin660 block is located on the north side of the Bin649 rolling anticline,which is higher than the northwest in the southeastern part,and is close to the south boundary fault.There are seven faults developed in the area,which are ladder-like development in the section,simple structure on the plane,and the two main faults in the north and the south are parallel,and low order fault and the main fault crisscross.And the development of these secondary faults makes the internal construe complicate.The boundary fault is a shovel-type fault,NE.Under the control of the large boundary fault,the internal development of the inferior sequence fault is mostly the direction of things,leaning south.