Research On Reservoir Geological Characteristics Of Tian 5 Fault Block In Linnan Sag

In this paper,Tian 5 fault block specific field reservoir geological characteristics and development status,based on research in the area of previous knowledge on the use of some new technology and methods to re-examine the geological characteristics of the reservoir area,the first segment of the target layer again stratigraphic were fine sand single level,and then combined with the use of three-dimensional seismic data stratigraphic division and correlation of the results of re-structural interpretation,the structural characteristics clarify on the basis of experimental data combined with adjacent areas of re-logging data storage layer of interpretation,and based on the macroscopic heterogeneity of the reservoir study to interpret the results,and on this basis,the use of gray correlation coefficient method for reservoir classification and evaluation,and finally on the basis of the above research,the establishment of the reservoir three-dimensional geological model layer,lay the foundation for reservoir simulation work late.In this paper,Tian 5 on segment is divided into two basic groups of three sand on the use of sedimentary cycles and lithology comparison method destination layer into a total of 40 small layer,wherein a small layer of oil 19.Two,three sand set in the lateral continuity of sand than four groups to be poor,single sand thickness of four groups generally larger,better continuity,including three 3 small layer of sand group,a group of four sand,3,7 small layer of oil is the main small layers.Fine structural interpretation by studies suggest that the area cut by two north-south boundary faults from inside has been a nearly north-south east-west trending faults cut two small block,which is basically consistent with previous understanding,in the eastern block again re-identify a fault in about 10 meters away from the secondary small faults,three sand set in the vertical inheritance better structure are simple monoclinic structure.By logging interpretation of secondary studies suggest that the reservoir area for the hole in the reservoir permeability,porosity distribution mostly in the 20 or more,the distribution range of permeability between 70 × 10-3?m2 ~ 100 × 10-3?m2.On the basis of log interpretation,based on the study of macroscopic reservoir heterogeneity think,between the reservoir layer and the inner layer of the plane heterogeneity strong line,whereby the final classification and evaluation of the reservoir,the reservoir area divided into three categories,of which four sand reservoir was significantly more than the second and third sand group.Finally,calculation of reserves,and the establishment of three-dimensional geological model of the reservoir,the results through data distribution and model reserves the model test that model is more reliable.Tian five main source to block oil from southern Linnan sag,in effect blocking the northern boundary fault gathered into hiding,the impact of the structural characteristics of the distribution of oil affected,mainly in the vicinity of structural highs northern boundary fault,Since the closure of the role of internal secondary faults,makes two things belong to different water block system,with no oil-water interface.In addition,the oil distribution is also affected by the impact of the heterogeneity of the reservoir,in the vertical,due to the layer and the inner layer of the spacer layer sandwich of development,so that each small layer of oil is almost no correlation;in the plane,the general porosity osmotic rate larger area,is the main area of oil distribution.