Refined Indentification About Complex Fault Block Trap In Haian Sag

Haian sag is the key area of Jiangsu oil field gas increase in oil reserve and production,but with the improvement of old mature exploration degree and exploration areas from simple structural trap to complex and subtle trap field,Increasingly difficult to find and practicable favorable traps,the technical method of the trap identification is also put forward higher requirements.In this paper,according to the existing seismic,geology,well-curve and testing data,in-depth research on trap identification,according to the structural trap,subtle trap and shallow traps in three parts,which the trap identification taizhou group is the research focus,Basically achieved the following results:1.The favorable zones for taizhou group structure reservoir oil and gas migration and accumulation,tectonic style analysis and comprehensive interpretation of fault,the relationship between different level sequence fault combination,through seismic forward modeling,coherence,and data fusion technology,a clear taizhou group T40 seismic reflection characteristics and the recognition of small fault,detailed interpretation of the seismic reflection,find and implement small fault(micro slip)charged traps;2.In view of the taizhou group of subtle reservoir,based on the fine sand layer group contrast,combined with the research of sedimentary microfacies and sand body distribution characteristics of research,clear development rule of the sand body by seismic attribute extraction and frequency division processing,wave impedance inversion technology to identify subtle trap.3.Through the study of all concave shallow haian sag,combining qu pond findings of concave,optimization and its main areas with similar conditions,to carry out the fine structure interpretation and implementation of shallow favorable target area and the target block.4.According to different formations and different types of trap evaluation optimization,provide drilling target.By adopting corresponding technical methods,explained in the 3d seismic 1104.09 km2,150 km of 2D seismic,and several key areas of a subtle trap predictions,found a group of favorable structural trap and fault-lithologic trap,provide powerful guarantee for the next step prospecting Haian sag.Also established a set of suitable for haian sag of small fault and subtle trap prediction method and technical process.