Terpretation And Structural Evolution Anal Ysis Reveal Of Huhehu

Huhehu depression is in the area of a larger peripheral sag sag of Hailar basin, has the objective layer area, continuous buried oil conditions superior characteristics. But due to the complexity of the tectonic subsidence characteristics, at present of Huhehu sag tectonic characteristics and evolution of the lack of a unified understanding, affecting the further exploration and development in the region. Therefore, it is necessary to fine interpretation of seismic data, the tectonic framework and evolution of recovery.By using 2D and 3D seismic data, has carried on the detailed seismic interpretation, on the basis of this were structural features in the study, and the analysis of tectonic evolution history. The main results are the following several aspects: understanding to rationalize the T_2-2- T₅ deep fault system and T_2-1- T₀₄ shallow layer fracture system of space extension implementation level fracture 5, secondary fault 6, identify tertiary fault 99, implement trap 157, trap area 1317km². Recovery of the Nantun Formation- prototype pattern during the deposition of river mill turn Huhehu depression group. Nantun Formation- grinding Shui River sedimentary period, in Huhehu sag and its adjacent areas developed three sizeable nee to control fault, the plane the three control faults is en echelon distribution, and formed a half graben fault depression group. In Yimin period, Hui cable wood fault, call and Hunan fault right order diagonal strike slip fault system activity, make to the west of the tin Linbeier convex continuous uplift, to the east of Huhehu depression continued settlement. Nantun period, the above three half graben fault depression in the initial crack subsidence stage and sedimentary filling with inflow from the conversion at the slopes of the long axis of the source, is the main reservoir layer series of development period. Large grinding Shui River sedimentary period, the aforementioned three half graben fault depression in severe fault depression period, settlement, ancient landform contrast big, water depth, sedimentary filling in short axis provenance is developmental stages of the main hydrocarbon source rocks.This study identified in Huhehu depression in different periods of tectonic fracture type, combination rules and distribution characteristics of, identified the transformation characteristics and evolution law of each period, Huhehu sag next oil and gas accumulation conditions and planning deployment provides a solid geological information and for stable Haita increasing reserves provide important basic geological support.