South Block Wang Gou Men Of Wuqi Oilfield Chang 6 Sand Body Configuration Study

As the oil fields gradually enter the stage of high water cut and high production,how to accurately distribute the remaining oil and improve the oil and gas recovery has become the main target of the exploration and development of the oil fields.On the basis of studying the present situation and development trend at home and abroad,this paper is guided by the theory of sedimentology,tectonic geology,sequence stratigraphy,reservoir geology,logging geology,development geology and so on.This paper starts with the geological characteristics and development characteristics of the Wang Gou area in Wuqi oilfield,and starts with the formation model of the reservoir.Using the data of geology,earthquake,logging and various kinds of testing,through the analysis of the genesis of the single sand body,the vertical division,the plane identification and the connection relationship among the single sand bodies,the 6 sand bodies of the Wang Gou area in Wuqi oilfield are fine depicted,and the suggestions for the development of the next oil field are provided.The main achievements of this study are as follows:(1)based on the theoretical guidance of cyclical contrast and classification control of high resolution sequence stratigraphy,the fine division and contrast of 101 wells in the whole region are divided into 6~1,6~2 and 6~3 long,and then 6~1 into 1 small layers and 2 small layers,and 6~2 is divided into 3 small layers and 4 layers,and the Chang 63 is divided into small layers and small layers.(2)through the observation and analysis of core core,according to core data of core well in this area,it mainly includes core color,lithology,sandstone composition,structure,grain size data,sedimentary structure,and contrasting the sedimentary characteristics of the area with the related sedimentary environment characteristics summed up by the predecessors,with the shape of well measuring curve and the sand body on the plane.The distribution rule is further subdivided into subaqueous distributary channel,estuary dam and distributary Bay sedimentary microfacies.(3)based on the isochronous stratigraphic framework of 6 small layers and 21 sections of the complex channel sand body,combined with the sedimentary microfacies and using the long 6 reservoir logging curve,the single sand body is divided and dissected,the identification mark of the single sand body is summed up,the cause of the single sand body is analyzed,and the size of the single sand body is determined.(4)on the basis of fine portrayal,the distribution characteristics of single sand body section are studied.Most of the wells are connected to the most of the wells controlled by the channel single sand body in the northwest direction of the CIS provenance,and the transverse sand bodies of most small layer units are continuous and have a wide range and exist in most layers.Due to the source of the vertical source,the well connected body,controlled by the single sand body of the river channel,will be very few,which causes the transverse sand body of most small layer units to be discontinuous and the transverse distribution is limited.The main development types of single sand body are underwater distributary channel single sand body and estuary dam single sand body.To sum up,the main problems facing the research area are the thinning and deepening of reservoir geological research,focusing on the fine layer division and comparison,the development of small layer and thick layer interlayer,the study of residual oil potential and the study of fine water flooding and digging potential.The fundamental reason is that for the late development of the late development of the continental reservoir,it is necessary to dissect the internal configuration of the small layer sand body,to study the seepage barrier,the difference in the seepage and the control of the distribution of the remaining oil.