| The thought of this paper is to use the related theory of petroleum geology as a guide also combines macro and micro research train.The data been used include: logging,well logging,analysis assay.In this paper,the reservoir,stratigraphic,sedimentary facies of the region is set as the main object of study,based on the regional geological characteristics and sedimentary facies,this paper studied reservoir characteristics and made reservoir classification evaluation.On this basis,combining with the characteristics of gas reservoir distribution,make simple research about the relationship between reservoir and gas enrichment.Through the regional geological structure and sedimentary analysis,a clear understanding of the regional tectonic and the basic characteristics of the study is being made.The main sedimentary facies in the region is the restricted sea platform subfacies of epicontinental sea carbonate platform system,which can be subdivided into dolomitic flat,grey-dolomitic flat,mud-dolomitic flat facies.The reservoirs are mainly distributed in dolomitic flat.The rock type includes dolomite and limestone,dolomite of different crystalline structure is the main reservoir rock.The diagenetic environment include evaporation seawater diagenetic environment,atmospheric freshwater diagenetic environment,the burial diagenetic environment.there are a lot of diagenesis type in the region,which include dissolution,metasomatism,fracture diagenesis,compaction,pressolution,cementation filling the role and recrystallization.The former three belong to constructive diagenesis,the latter three belong to the destructive diagenesis.The main reservoir space include dissolution pore(hole),intercrystalline solution pores,fracture,gypsum mould pore,intergranular hole.Reservoir types are divided into ? good reservoir and ? poor reservoir.Reservoir thickness and gas enrichment has a positive correlation.reservoir physical property have good relationship with gas enrichment. |
PDF Full Text Request