The Tectonic Evolution And Sequence Stratigraphy Research Of Northern Bonaparte Basin And Typical Passive Margins Deep-water Basin

Deep water oil and gas exploration is the hot spot and most potential field of current oil and gas exploration, Norhern Bonaparte Basin is rich in oil and gas resource, and also is an important area of strategic vision, but the geological conditions and the background for oil and gas accumulation of Norhern Bonaparte Basin is unique. So the research of the tectonic evolution and sequence stratigraphy research of Northern Bonaparte Basin and typical Passive Margins Deep-water Basin has important theoretical and practical significance.Northern Bonaparte Basin is the terminal deep-water basin, this paper we use the reginal geological data, seismic data, drilling, logging data and core data to carry out integrating wells with seismic data sequence stratigraphy study, and then study the tectonic, sequence, sedimentary and hydrocarbon geologic characters of North Bonapart Basin. Based on these researches, conclude that Northern Bonaparte Basin has experienced the tectonic evolution of rift onset, continental rift, expansionl continental margin, mature continental margin and terminal continental margin, and formed four unconformities (rift onset unconformity, breackup unconformity, continental rise transform unconformity and subduction and collision unconformity). During this tectonic evolution, it formed rift onset sequence, continental rift sequence, expansionl continental margin sequence, mature continental Margin sequence and Terminal Continental Margin sequence, and also experienced the sedimentary evolution of non-marine sedimentary→transient sedimentary→marine sedimentary.By comparative study of different Passive Margins Deep-water Basin, the follows results have been conclude: the Passive Margins Deep-water Basin only formed three unconformities (rift onset unconformity, breackup unconformity and continental rise transform unconformity), has experienced the tectonic evolution of rift onset, continental rift, expansionl continental margin and mature continental margin. During this tectonic evolution the Passive Margins Deep-water Basin formed four tectonic-sequences. After these reaearches, we pointed out that:①in the deep-water basin without salt rock, the Continental rift sequence and the Mature Continental Margin sequence are the most important exploration targets (such as Northern Bonaparte Basin and Niger Delta Basin);②in the deep-water basin with salt rock, the Continental rift sequence is the most important exploration target (such as Campos Basin, Santos Basin and Lower Congo Basin).