Analysis Of Fault’s Segment Growth Pattern In Xing 6～7 Blocks Of Daqing Oilfield

The geological structure is complex in Xingbei Development Area of Daqing Oilfield,and the number of faults is large,so many problems,such as the phenomenon of more than one point of fault in one well and fault growth and evolution model,can’t be solved.It’s necessary to further structure interpretation by combinating well and seismic,carrying out the analysis of the fault growth pattern in the study area, fine fault interpretation and fine characterization of microstructure to improve the accuracy of describing faults,have important guiding significance to to find remaining oil.Firstly,get to know the sedimentary background of Xingbei Development Area, Guided by the sequence stratigraphy and sedimentology, by means of well logging,conduct stratigraphic correlation,and recognize all the the points of fault vertically guided by structure pattern,locate the points of fault in each oil layer group on the plane.Secondly,according to fine horizon calibration,use seismic section and horizontal slice to identify fault in study area,match well points and faults by combinating well and seismic,form three-dimensional depiction of multi-section segment superpotion pattern,confirm that faults in the study area have the phenomenon of segment growth.Thirdly,on the basis of multi-activities of Putaohua oil layer and the combination feature and fault’s segment growth mechanism,according to fine research by combinating well and seismic,obtain the faults’ segment growth pattern in Xing 6 ~ 7 blocks that faults’ growth go through 4 stages,including phase of faults’ propagation fold, phase of vertical segment growth, phase of through hard-connected and phase of faults’ full connection. Faults’ space combination is the right order inclined superposition vertically,segment faults’ main active period is during yaojiazu period,two segment growth points locate near T1 and T11,and the segment growth position is plastic formation based on mudstone and politic siltstone,and then explain the reson of the phenomenon of more than one point of fault in one well.Finally, according to the control fuction of fault segment growth feature on the distribution of microstruture microstructures regularities of distribution as guidelines,,use structure map and distance and fault displacement curve,to distinguish and depict microstructures by side of faults,provide a solid geological basis for analysis and potential tapping of remaining oil.