Concept of seismic sedimentology and its application in continental rift basin
Online published: 2012-08-20
Seismic sedimentology is a new marginal interdisciplinary subject following seismic stratigraphy and sequence stratigraphy. It is superior in the research of depositional systems and reservoir prediction and has obtained obvious results in carbonate oil and gas exploration. But there is fewapplication in continental rift basin.With the help of high resolution seismic data, abundant log data and geological data, combined with Luanping field outcrops, guided by seismic sedimentology theory, a 3D geological model of fan delta was established based on the research of high resolution sequence stratigraphic framework and sedimentary system in Nanpu Depression. The framework includes one secondorder sequence unit and four third-order sequence units in Dongying Formation. The third-order sequence units can be divided into highstand system tracts, transgressive system tracts and lowstand system tracts by the maximum flooding surfaces and the first flooding surfaces. The sand bodies are large of scale in highstand systemtracts, which are the most favorable reservoir; while they are smaller relatively in lowstand system tracts, forming good reservoir-cap assemblages with shales in transgressive systemtracts. According to the structural setting and the three-dimentional geological model, guided by seismic sedimentology theory and research thought of well-seismic mutual feedback, it is considered that fan delta systemis the main depositional systemwhich is forming by several distributary channels, and thin layer lacustrine mudstone deposits between underwater distributary of channels.
YANG Qianqian , LI Xiangfang , WU Qiong . Concept of seismic sedimentology and its application in continental rift basin[J]. Lithologic Reservoirs, 2012 , 24(4) : 64 -69 . DOI: 10.3969/j.issn.1673-8926.2012.04.012
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