The Paleogene and Neogene in Bohaiwan Basin are mainly developed as follows：
A. half graben
B. reverse fault
C. foredeep
D. front-fold-thrust belt
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The deployment principles of detailed sag survey exploration are as follows：
A. Based on the background of the formation of the play, the systematic anatomical structure and sedimentary characteristics
B. Focusing on the establishment of a play accumulation model, focusing on the study of petroleum migration and accumulation and preservation conditions, and dividing accumulation combinations
C. Pay attention to all kinds of reservoir cap rock combination and correctly select exploration target layer
D. Focuses on the paleolatitude, paleogeography and Paleoclimate of the source rocks
As for the relationship between the density of seismic network and the number of traps found, the correct descriptions are as follows：
A. There is a positive correlation between the number of traps and the density of seismic network
B. It is found that the number of traps increases rapidly first and then slows down with the increase of seismic network density
C. There is a negative correlation between the number of traps and the density of seismic network
D. It is found that the number of traps decreases first and then increases with the increase of seismic network density
In the detailed sag survey period, the drilling type generally deployed is：
A. scientific exploration well
B. parameter well
C. wildcat well
D. appraisal well
In the play assessment period, the main purposes of deploying parameter wells are:
A. Further understanding of the stratigraphic sequence, contact relationship, lithology and lithofacies characteristics of the secondary structural unit
B. Understand the combination of reservoir and seal rock and determine the main target layer for exploration
C. It provides parameter basis for geophysical data interpretation
D. Exploratory petroleum exploration
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