Fault Block Trap Evaluation Technology and Application Effect Combining Static and Dynamic Characteristics of Gas Reservoirs in Complex High Steep Structural Zones

Due to strong compression in the later stage, multiple rows of positive structural zones were formed in southern Sichuan. The Dengjingguan structure is a high and steep structure with a complete anticline morphology, which develops from bottom to top and has favorable overall structural conditions. There are many drilling wells in the Jialingjiang Formation of the Dengjingguan structure, with drilling concentrated in the 1950s and 1960s. There are only three wells with complete drilling curves, and the faults within the structural zone are developed and fragmented as a whole. It is difficult to accurately identify the structural traps of the fault blocks within the structural zone, making it difficult to evaluate exploration potential and affecting subsequent well site deployment. In response to this issue, this article uses newly acquired 3D seismic data to carry out fine structural interpretation, combined with the actual drilling situation of production dynamic data, and combines static and dynamic to complete the evaluation of the Dengjingguan structural block. Dynamically leveraging the advantages of the new 3D, we can sort out the development patterns of faults from regions to blocks, and then from blocks to local systems, and use coherent attributes to determine the distribution of faults. Dynamically utilize the pressure coefficient of drilling and the production data of gas wells to validate the static interpretation plan, conduct well to well comparisons, and repeatedly revise the static interpretation results. The evaluation of fault block traps through the combination of static and dynamic gas reservoirs effectively reduces the ambiguity of complex high steep structural fault block interpretation, improves the rationality between wells, and provides reliable basis for the subsequent exploration and well location deployment of oil fields. It has good guidance and reference significance for the potential evaluation of complex high steep structural fault blocks in southern Sichuan in the future.