The Structural Characteristics And Favorable Exploration Targets In Huazhuang Area

Influencedby the brokenfault structures,numbers of faults as well as the complicated accumulation condition,the current exploration benefit is relatively low in Huazhuang area.This thesis,based on the studies of structural geology,sedimentology and petroleum geology,analyzing the 3D seismic interpretation data and comprehensive logging and geological data,directed by the research of fault geometry features,the kinematics characteristics as well as tectonic genesis as the guiding ideology and method,started from seismic interpretation and the analysis of the typical seismic profiles,detailed studies the geometry features,the causes of fault activity characteristics as well as the tectonic genesis in the studied area.Analyzing favorable hydrocarbon accumulation conditions and reservoir types,as well as predicting favorable traps will produce a very important theoretical andpractical significance in the further exploration of Huazhuang oil field.Through 3D seismic interpretation,the detailed explanation has been done in the studied area.According to the results of the interpretation,the classification of faults has been made in terms of the secondary fault in the studied area.Combined with precision seismic interpretation,the thesis studies the geometry characteristics of the faults,and holds that the faults in the studied area is well developed,and thestrikes of fault are mainly NEE,nearly EW and NW.The types of fault plane combination include parallel combination,oblique-shape combination and grid-shape combination.Fault section combination types mainly include developmental ladderlike combination,"Y" glyph combinations and graben.Selected three lines of different tectonic position in the study area,compiled the structural evolution sections,combined with the calculationof the average fault throw and fault activity rate,this thesis holds that the main strata of the fault activities is from the third member of the Funing formation to the lower Dainan formation.Comprehensively analyzing the geometry and kinematics characteristics and the structure of the cause of faults in Huazhuang area,we hold that in addition tothe control of regional stress field and Tanlu Fault,the development of faults was mainly affected by boundary faults.Based on the study of geometry and combination types of faults,the thesis analyzed the influence of the structure of hydrocarbon accumulation,and holds thatreservoirs are mainly fault block reservoirs and fault nose reservoirs.Through the analysis of the distribution of oil and gas in Gaoyou sag and the impact of faults on the gathering and distribution of oil and gas,the thesis studies accumulation conditions from some aspects,respectively sources of oil and gas,conditions of reservoirs as well as conditions of traps,forecasting that there are two favorable traps: No.2 and No.6.