Fine Reservoir Description Of Chang2 Reservoir Of Yanchang Formation In The First Part Of Dalugou Area Of Jing'an Oil Field

Based on the new theories of modern fine reservoir description , by using theories and techniques of the petroleum geology ,high-resolution sequence stratigaphy ,sediments ,reservoir geology ,modeling of geology, carried out the research of the fine reservoir description of Chang2 reservoir of Yanchang Formation in the First part of Dalugou Area of Jing'an Oil Field. In these studies ,the new geology ,well logging of physical geography ,well gathering ,test oil ,chemical analysis date and all other useful date are used ,combined the characteristics of structure-lithology of the study area , the research including the fine compartmentalized and parallelled of layers ,sedmentary microfacies , integrately classified and estimated of reservoir ,flow unit, modeling of geology, founding the three-solid geology modeling of the study object. The results can play an important theoretics and practical role in the research of the prospected and exploitation of the Chang2 reservoir of the Yanchang formation in the First part of Dalugou Area of Jing'an Oil Field.After studying ,these main harvest and innovation are achieved:1.By combining the high -resolution sequence stratigaphy theory and the equality -and slice up ,acting-whisht testing one another techniques for the first time, studied the sides of the fine compartmentalized and parallelled of layers of Chang2 in the studying area, effectively conquered the difficulties and avoided errors in the former work which only using the gyration in the fine delamination in the Ordos basin, truely founded the building block of the aim sequence in the study area.At the same time, enriched the theoretics of the land river deposit fine compartmentalized and parallelled of layers.2.Based on the sedimentary background in study region ,studied the sedmentary microfacies in the researching area. After confirmed the subfacies , identified the sedmentary microfacies types of riverway , midstream ,antiquated riverway ,interfluve and riverside.At the same times, studied the characteristics of the lithofacies .Furthermore , summarized the sedimentary mode of the Chang2 reservoir in the first part of the Dalugou area in order to guiding the prospected and exploitation of the oil and gas in the next steps.3.Based on the research of four- character relation, explained the well logging again of the Chang2 reservoir in the studying area, the afresh explaining of well logging has the distance of every eight point in one metre, and it can distinguish the thickness distance like 0.125 metre. These study provided qualification for the three-solid ration modeling of geology.4.From the petrology ,the microcosmic characteristics of reservoir ,diagenesis analysing of well logging interpreting ,heterogeneity of the reservoir ,dominated factors of the play and other parts integrately studied the basic characteristics of the aim reservoir. Furthermore, chose reservoir quality , effective thickness ,heterogeneity of the reservoir and used software of SPSS to process clustering analysis, and integrately estimated and classified the reservoir in the studying area.5. Studied the flow unit of the Chang2 reservoir of Yanchang Formation in the First part of Dalugou Area of Jing'an Oil Field for the first time. Chose the parameters of the reservoir quality which can plentily delegated seep ability of the reservoir, using methods of clustering analysis and differentiated analysis, plotted the aim reservoir to four flow unit kinds of A ,B ,CandD.6.Using the methods of sediments cortrolling and random modeling, chose RMS software, founded structure ,sedmentary microfacies ,reservoir quality ,NTG and flow unit modeling of the Chang2 reservoir of Yanchang Formation in the First part of Dalugou Area of Jing'an Oil Field in a tuft, in order to afforded firm geology gist for the latter numerical value simulation and the tertiary oil extraction and enhancing oil recovery.