Research On Middle Array Of Sequence Stratigraphy In The North Of Tai Kang

Guided by the theory of sequence stratigraphy, the thesis intends to make an overall and systematic research on the features of middle array of sequence stratigraphy, sediment, evolution, entrapment, combination of source rock, reservoir and rock cap as well as the distribution laws of reservoir. Based on the six favorable target areas for exploration, it sets up the identification marks for the sequence interface, parasequence sets, parasequence, and dense section of middle array in that area. And it identifies the sequence interface based on seismic profile and drilling knowledge. By keeping close track on the contrast of the six reflectors of earthquake T2,T1g4,T1′,T1,T07 and T06, it establishes the sequence stratigraphy framework and forms the identification marks for sedimentary system, sedimentary facies, sedimentary microfacies. Through the analysis of sand isopach map, single well sedimentary microfacies and sedimentary system ichnograph, it clarifies the distribution laws of sedimentary microfacies of sandstone and predicts the distribution area of lithologic trap, providing more knowledge on petroleum source bed, reservoir and capping formation in the north of Tai Kang area. At last it points out that the key reason for forming hydrocarbon-bearing pool lies in the degree of local cap rock abundance and its broadside sealing. More importantly, it demarcates the favorable potential exploratory zone and predicts the exploratory targets based on the explanation of fine structure.