Structural Lithology Traps And Target Optimization In Shasan Section Of Nanpu NO.5

The exploration of deep natural gas in Nanpu sag has obtained high yield industrial gas flow in the Shahejie formation igneous rock in Nanpu NO.5 structure,which indicates that the deep Shahejie formation in the study area has great exploration potential.However,the Shahejie formation in the study area has developed faults,complex stratigraphic contact(intercalation of multi-stage igneous rocks and sandstone),unclear sedimentary system,diverse types of reservoirs(igneous rocks and sandstone),and rapid changes in vertical and horizontal physical properties of reservoirs.This paper has a unified understanding of the uniform horizon,overall structural characteristics and reservoir distribution rules of the Shahejie formation in the study area.It is necessary to carry out an overall study on the fault combination pattern,reservoir distribution rules and main control factors of the reservoir,and make clear the stratigraphic framework,structure,sedimentation,reservoir characteristics and main control factors of hydrocarbon accumulation of the Shahejie formation in the study area.1.Carry out sequence and system domain division.Under the stratigraphic framework of sequence and system domain,carry out the stratigraphic interpretation of Shahejie formation of Nanpu NO.5 structure to clarify the contact relationship between strata;2.Carry out the interpretation of the whole section fault and the analysis of the structural evolution,implement the fault structure style and the fault activity period,and determine the major oil-source faults.3.Carry out research on sequence and system domain paleogeomorphologic recovery,establish sedimentary model by combining drilling and earthquake,and define sand body enrichment rule.4.Under the stratigraphic framework of sequence and system domain,carry out the division of key area and key strata quasi-sequence and the interpretation of fine structure,and refine the research unit.5.Under the framework of system domain and quasi-sequence,reservoir prediction was carried out,and sedimentary facies belts were divided by drilling and seismic methods.6.Under the framework of system domain and quasi-sequence,the development model of volcanic rocks was established,and fine identification,characterization and fracture prediction of volcanic mo NOmers were carried out to define favorable facies belts of volcanic rocks.7.Carry out dominant reservoir prediction under the framework of quasi-sequence.8.Identify and optimize favorable traps.