To identify the factors and mechanisms affecting reservoir micro-heterogeneity in the same type of microfacies at different stages of cycle, the main controlling factors of the reservoir micro-heterogeneity of the mouth bar in Es2-9 Formation of the Shengtuo Oilfield were analyzed based on the sedimentary dynamic analysis of high resolution stratigraphic sequence and quantitative parameters of reservoir micro-heterogeneity. The base level cycles of different stages have a differential control on the reservoir micro-heterogeneity of the mouth bar. The changes of the base level in different orders lead to variation in accommodation space and sediment supply, and in turn changes in sedimentary environments of mouth bar at different stages, as a result, the reservoir micro-heterogeneity of the single mouth bar in short-term base level cycle is strong at bottom and weak at top, the reservoir micro-heterogeneity of compound mouth bar (formed by different stages of single mouth bar) in middle-term base level cycle gets weaker from bottom-up, and the reservoir micro-heterogeneity of compound mouth bar at different stages of long-term base level cycle has no obvious pattern.

To identify the influence of base-level cycle on the macro-heterogeneity differences of the reservoir among the same type of microfacies in different stages of base-level cycle,using the dynamic principle of the high resolution stratigraphic sequence sedimentation is to analyze the main controlling factors of the reservoir macro-heterogeneity of the estuary dam in Es_2-8 formation of Shengtuo Oilfield on the basis of statistical data and core test material,and this study illustrates the control mechanism of base-level cycle on the macro-heterogeneity differences of the reservoir among the estuary dam in different stages of base-level cycle.Besides,this paper concludes the distribution characteristics of the reservoir macro-heterogeneity among the estuary dam in different stages of base-level cycle.The results show that the base-level cycle in the different ranks goes up and down,which results in the change of accommodation and sediment supply condition and leads to appearance of difference in reservoir sedimentary environment of estuary dam in the different stages.It makes that the reservoir macro-heterogeneity of the upper part of the single estuary dam in short-term base-level cycle is lower than that of the basal part,and the reservoir macro-heterogeneity of the upper part of the compound estuary dam(formed by different stages of single mouth bar)in middle-term base-level cycle is lower than that of the basal part.What's more,the reservoir macro-heterogeneity of the compound estuary dam in the different stages of long-term base-level cycle is distributed irregularly.

Temperature and stress of country rock are obtained by the simulation of the temperature and stress when magma emplaced. The quantitative relationship between heat field and condensation contraction joint are established by integrated application of strain energy and surface energy theory. The fracture parameters are assessed quantitatively. Consequently, the development law of contraction joint is concluded in metamorphic belt. The metamorphic thickness increases when the intrusive thickness increases, while no metamorphic belt forms when the intrusive thickness is less than 20 m, by the study of the contact metamorphic belt in north slope of Gaoyou sag. Thermal stress decreases with the increasing distance from the intrusive rocks. Condensation contraction joints are chiefly extensive near the intrusive rock and the maximum of crack linear density is about 13 cracks/m. Away from the intrusive rock, the density of fracture line rapidly decreases, especially 3-6 linear density of cracks/m in the metamorphic belt edge. Overall, the upper metamorphic permeability is slightly better than that of the lower one. The maximum porosity of condensation contraction joints lies in the most thickness of the intrusive rocks, and short axis direction of crack penetration is similar to vertical direction, while its permeability is greater than that of the long axis. The validity of this simulation is testified by rock core statistics.

Taking 11J11 dense drilling zone, Gudao Oilfield, Shengli petroleum province as a case, according to core, well logging and performance data, combining outcrop and modern deposition study on meandering river, the systemic analyzing method of subsurface reservoir architecture of the meandering river is established. On the basis of accurate sequence frame and architecture elements interpretation in single well, the method of hierarchy analysis and model fitting is applied in architecture anatomy, four architecture hierarchies, composite meander belt, single meander belt, single point bar and lateral accretion sandbody are identified and anatomized. Research results are accorded with sedimentary pattern of the meandering river and performance data in the study area, indicating this method is reasonable. Three-dimensional reservoir architecture model is set up precisely, spatial characteristics of lateral accretion shale beddings in point bar are exhibited, which are scientific reasons for remaining oil distribution controlled by reservoir architecture. The application effects of this method in Gudao Oilfield are good and can be used in other similar oilfields.

PreviousNext No AccessSEG Technical Program Expanded Abstracts 2009Seismic inversion constrained by well data and geological faciesAuthors: Jun WangXuri HuangJun WangShengli Geological Research Institute, SinoPecSearch for more papers by this author and Xuri HuangSunRise PetroSolutions Tech, Inc.Search for more papers by this authorhttps://doi.org/10.1190/1.3255359 SectionsSupplemental MaterialAboutPDF/ePub ToolsAdd to favoritesDownload CitationsTrack CitationsPermissions ShareFacebookTwitterLinked InRedditEmail Abstract This work proposes a method to perform seismic inversion using the constraints of well data and geological facies. This method uses statistics from well logs as a constraint for inversion which leads to a stochastic modeling process with high resolution. In general, large scale facies information is available for the field. The facies is used as a classifier to extract the statistics for each facies. Using the classification, the constraint has a spatial variation according to the geological model. With this spatially variant constraint and by matching the seismic, the inverted model has a better spatial resolution compared to that from one with a log constraint only. By applying it to a fluvial depositional field, the validity of this method is demonstrated. In particular, the result has a better lateral image which is also consistent with the geological pattern.Permalink: https://doi.org/10.1190/1.3255359FiguresReferencesRelatedDetailsCited ByDevelopment and application of iterative facies-constrained seismic inversion4 May 2021 | Applied Geophysics, Vol. 17, No. 4Improve impedance inversion by adopting seismic sedimentary-guided a priori modelXianzheng Zhao, Fengming Jin, Lihui Liu, Yang Xiao, and Li Wang6 June 2016 | Interpretation, Vol. 4, No. 3 SEG Technical Program Expanded Abstracts 2009ISSN (print):1052-3812 ISSN (online):1949-4645Copyright: 2009 Pages: 4338 publication data© 2009 Copyright © 2009 Society of Exploration GeophysicistsPublisher:Society of Exploration Geophysicists HistoryPublished: 14 Oct 2009 CITATION INFORMATION Jun Wang and Xuri Huang, (2009), "Seismic inversion constrained by well data and geological facies," SEG Technical Program Expanded Abstracts : 2477-2481. https://doi.org/10.1190/1.3255359 Plain-Language Summary PDF DownloadLoading ...