Study On The High-Efficiency Well Potential And Integrated Potential Exploration Technology At The Edge Of The Western Large Fault In Xing 1-3 Area

After years of development and adjustment,all kinds of oil layers have been flooded to varying degrees,and the oilfield has entered the development stage of extra-high water-cut stage,with low balance coefficient of storage and production,great difficulty in stable production,highly dispersed remaining oil space,and great difficulty in conventional potential digging.How to excavate the remaining oil economically and effectively has become an important subject of improving oil recovery.Faults are well developed in the western block of Xing1-3,and the remaining oil is relatively abundant nearby.Efficient wells are found at the edge of the well to make full use of the remaining oil and improve the comprehensive potential digging effect.In this paper,a comprehensive study of the comprehensive geology is carried out.Firstly,the structure is reunderstood,especially the fine interpretation of the target fault well earthquakes,the combination mode of breakpoints is defined,and the spatial location of faults is determined,which lays a foundation for the evaluation of injection-production relationship.The characteristics of reservoir development are defined to provide a basis for reservoir failure analysis and residual oil distribution.Then the residual oil distribution is studied quantitatively using numerical simulation technology to find out the location of residual oil.Finally,based on the research results of structure,reservoir and residual oil,combining with the current injection and production status of oil and water wells,the residual oil accumulation area,efficient well digging method and the optimal design location are determined.Through comprehensive consideration of the block's structure,reservoirs,remaining oil,development status and current technology,five principles for overall potential tapping have been determined,which specifically refines complex fault blocks,combined faults,large well spacing,and fault stacking.There are 5 potential types such as overburden and loss of reservoir failure,injection and production out of control,and 2 vertical wells drilled,6 highly deviated wells drilled,11 old wells designed for sidetracking,2 reinjections,7 supplementary holes,etc.Potential tapping measures have formed an overall potential tapping technology suitable for the geological characteristics of the study area.In this way,the development effect of the block is improved,and it plays a positive role in improving the recovery rate of the block water drive.Based on the data of dense well pattern and on the basis of grasping the tectonic evolution law of the block,this study realizes the return alignment of breakpoints and the clear description of sections,laying a foundation for rationalizing the injection-production relationship and potential analysis of the fault edge.The fault type is determined by building a three-dimensional model of the relationship between fault and stratigraphic configuration.The continuity of the channel sand body across the main unit of the fault is predicted by seismic inversion data combined with sedimentary facies map.Through the calculation of the growth index of each reservoir group across the fault,it is determined that the fault has weak homogeny,which has little influence on the sediment thickness of the falling pan sand body.These studies are of guiding significance for the potential mapping of the fault edge and the selection of the target target area.