Integrated exploration of subtle reservoirs is a multidisciplinary research work under the framework of sequence stratigraphy with the information integration system as the platform

which can be performed in three stages

including basic data compilation

regional comprehensive evaluation and target prediction. In the basic data compilation stage

an information platform should be built to realize integrated management of multiple source data and achievements. The regional comprehensive evaluation should be carried out in the following steps

including the building of a regional isochronal sequence stratigraphic framework

study of the characteristics of sedimentary system and subtle traps

study of the reservoiring pattern of subtle reservoirs

and prediction and evaluation of the spatial distribution of subtle reservoirs

so as to illustrate the types

features

forming conditions and spatial distribution of the subtle reservoirs. Target prediction should be performed in steps including selection of the working area

high accuracy correlation of sequential framework

recognition and characterization of subtle traps and evaluation of oil/gas-bearing properties of subtle traps

so as to recognize and evaluate subtle reservoirs and finally determine the targets for exploration drilling. The information integration system can be developed on the basis of the COM GIS system and should have the functions of integrated management of petroleum exploration information and multidisciplinary data

comprehensive presentation and application of research achievements

as well as tapping mass data. Application of the integrated exploration methodology in the research of subtle reservoirs in Dainan Fm of Jinhu sag

Subei basin

shows that it is practical and effective.