Analysis Of Reservoir Forming Conditions And Potential Of Damintun Sag Sand Four Tight Oil

Damintun sag as a "small and fat" hydrocarbon rich sag,oil and gas exploration degree is up to 66.3%,in order to realize the continuous development of oil and gas exploration and development,continuous exploration and discovery of new fields is needed.In recent years,unconventional oil and gas exploration in the world has made significant progress,the exploration of tight oil is constantly breaking through the traditional exploration concept,and become the new "bright spot" of the growth of reserves.Es4 oil shale as the main hydrocarbon source rocks in Damintun Sag have large thickness and stable distribution.Through statistical analysis,51 wells showed hydrocarbon indication,Shen 224 well which in the oil shale section,has been obtained for industrial oil flow,demonstrating good prospects for exploration.This study which based on the idea of tight oil exploration,reference to the experience of exploration at home and abroad,study on structural evolution sedimentary conditions and source rocks,analysis of the relationship between oil shale genesis、formation structure、reservoir type and source reservoir configuration,is determined that the tight reservoir of the oil shale development section has certain exploration potential,Get a new understanding.Breakthrough of the original "oil shale" section as a whole source rock,a single lithologic Geological understanding,the oil shale development section have typical "sandwich" structure,and is developed with micritic dolomite and carbonate oil shale.Construction,lamination and contraction seam is also developed,the relationship between source and storage is favorable,the potential of tight oil exploration is huge.Using geological analysis and testing,logging evaluation and seismic prediction,formed series of technology which contained analytical laboratory logging evaluation to clear the dominant lithology,analysis and testing-logging evaluation to determine TOC distribution,post stack rock physical analysis and inversion prediction of dense layer distribution and so on,those technology provid technical support for favorable target evaluation.Through the study of system petroleum geology,transforming the geological concept,research ideas and technical methods which oil shale from the source rock to the reservoir,the geological prediction and evaluation method of the "sweet spot" area of dense oil is preliminarily explored,it has reference meaning for finding dense reservoir in Liaohe oil area.