The depositional facies, sequence stratigraphy, palaeogeography, and coal accumulation in the fluviolacustrine middle jurassic xishanyao formation in the central zhunnan central segment of the southern junggar basin coalfield, northwest china were analyzed based on outcrops, well cores, and geophysical well logs. The purpose of this chapter is to present a succinct summary of sequence concepts, focusing on what has become the standard, or most typical, sequence model, and making only brief references to exceptions and complexities. The stratigraphic concept of a depositional sequence was introduced to the scientific literature by exxon production research company eprco in the late 70s, building on the shoulders of giants. Seismic stratigraphy has now become one of the standard tools of the geoscientist, and there is a pressing need for an introductory text on sequence stratigraphy. Carbonates seismicscale geometries and sequence stratigraphic architecture of early cretaceous synpost rift lacustrine carbonate systems, presalt section, south atlantic margins. Sequence stratigraphy, typically used for hydrocarbon exploration in ancient strata, can be applied to late quaternary successions to decipher complex spatial relations among their aquifers. Sequence stratigraphy the basics free download as powerpoint presentation. Even though the physical dimensions of the outcrop might be fairly. Depositional sequence boundary selection is a wellknown controversy that could be resolved with objective recognition criteria. Insights for correlation, mapping, and genetic controls.
Vail riceuniversity, houston, texas it is important to establish the fundamental concepts of sequence stratigraphy and to define terminology critical for the communication of these concepts. Sedimentation at the axial area of the half graben axss started later, corresponding to the unit c in the scss. Aug 31, 2016 sequence stratigraphy is a branch of geology that attempts to subdivide and link sedimentary deposits into unconformity bound units on a variety of scales and explain these stratigraphic units in. Review article highresolution sequence stratigraphy of clastic shelves ii. The innovation and refinement of the techniques and concepts of sequence stratigraphy has been one of the most exciting and profound developments in geology over the past thirty years. Paleogeographic reconstruction of facies belts at precise moments in time is the goal of the sequence stratigrapher. Principles of sequence stratigraphy developments in.
Table 9, values used to calculate ottman and bohacs hardness percentage 37. Integration of physical, chemical, and biofacies data from out. Facies and sequence stratigraphy of the abo formation in the kingdom field area, terry and hockley counties, west texas. An interruption in sedimentation discontinuity is commonly accompanied by a period of erosion that can cause a significant gap in the rock record unconformity. Laketype controls on petroleum source rock potential.
Marine and petroleum geology university of alberta. Sequence stratigraphy american association of petroleum. Sequence stratigraphy is a branch of geology that attempts to subdivide and link sedimentary deposits into unconformity bound units on a variety of. Environmental sequence stratigraphy essenvironmental sequence stratigraphy ess process. The sequence stratigraphic approach yields depositional. Sequence stratigraphy material for this chapter are mainly from the following articles. Coals that cannot be correlated regionally may also have sequence stratigraphic significance, where they occur at specific horizons within a largerscale hierarchy of stratal variations hamilton and tadros, 1994.
Evolving methodology, emerging models and application histories authors. Towards the standardization of sequence stratigraphy. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Lazar, 2010, sequence stratigraphy in finegrained rocks at the field to flow unit scale.
Petroleum geology of the uticapoint pleasant play in. You are introduced to sea level and base level, sequence, concepts of sequence stratigraphy from the perspective of evolving sediment geometry through time, and relative sea level changes. Vail, 1987, sequence stratigraphy, allostratigraphy, isotope stratigraphy, and biostratigraphy. Seismic stratigraphy of the paleocene waltman shale member, fort union formation, wind river basin, wyoming k. Steel3 1 school of environmental sciences, university of liverpool, jane herdman building, liverpool l69 3gp, uk 2 department of earth science and engineering, imperial college london, london sw7 2az, uk.
Total petroleum systems and geologic assessment of undiscovered oil and gas resources in the san juan basin. Organic matter content and type variation in the sequence. Sequence stratigraphy is useful for analyzing cycles that range, in duration, from the 10 ka to 50 ma scale. To determine the sequence stratigraphic setting, facies architecture and geometry in the sediment. Practical sequence stratigraphy was originally published as a fifteenpart series in the canadian society of petroleum geologists monthly magazine, the reservoir, between may 2008 and september 2009. Pdf sedimentology and sequence stratigraphy of the. In the late 1970s, seismic data was interpreted stratigraphically to define packages of strata hundreds of meters thick that were deposited between sea level cycles that lasted 0. The sequence part of the name refers to cyclic sedimentary deposits. Introduction organicmatteromrichness,type, andthermalmaturity arekeyparameters used in the evaluation of conventional and unconventional petroleum systems tissot and welte, 1984. These three endmember facies associations are recognized based on objective physical, chemical, and biological criteria carroll and bohacs, 1999. Sequence stratigraphy is a working methodology that.
Jaffri with very deep and wide knowledge of carbonate and clastic depositional systems. Ashton embry for his work in making this series possible. This textbook thoroughly develops fundamental concepts of sequence stratigraphy that links baselevel changes to sedimentary deposits. As with any other method of stratigraphic analysis, the trend over time was to increase the resolution of sequence stratigraphy by applying the. Sequence stratigraphy, palaeogeography, and coal accumulation. Facies architecture of the upper calvert bluff a thesis. The geological setting descri bed in the lecture is hypothetical, and represents the first of a series of other hypothetical and real geological examples of. Paleontologic data, integrated with seismic and well log data, are an integral part of sequence stratigraphic analysis. You are introduced to sea level and base level, sequence, concepts of sequence stratigraphy from the perspective of evolving sediment. Principles of sequence stratigraphy provides an indepth coverage and impartial assessment of all current ideas and models in the field of sequence stratigraphy. Biostratigraphy in sequence stratigraphy aapg wiki.
It is also an analytical procedure that provides a framework for stratigraphic units and their bounding surfaces elated to their genesis. Case study of field x, niger delta kelechi azubuike ijomah1, beka f. Controls on sequence development octavian catuneanua, massimo zecchinb adepartment of earth and atmospheric sciences, university of alberta, 126 earth sciences building, edmonton, alberta t6g 2e3, canada b ogs istituto nazionale di oceanogra. Sequence stratigraphy is especially difficult to apply in many mudrock successions depositional sequences can be defined in many proximal mudrock successions but. Late pleistoceneholocene strata of the po basin were investigated using a sequence stratigraphic approach to produce a highresolution model for guiding. Organic matter content and type variation in the sequence stratigraphic context of the upper devonian new albany shale, illinois basin bei liua. Sequence stratigraphy is a type of stratigraphy that deals with the description, interpretation, classification, and nomenclature of sedimentary rocks based on their stratal stacking patterns and. A composite sequence boundary is interpreted at the base of the deepwater sediments in the scss with a lowstand sequence set extending from local units b to d. Environmental sequence stratigraphy essenvironmental sequence stratigraphy ess beauty of this approach is that the. These stratigraphic parameters can influence coal gas content. Geology, sequence stratigraphy, and oil and gas assessment. Sequence stratigraphy paleoproductivity clastic supply bottomwater redox condition 1.
Sequence stratigraphy lamontdoherty earth observatory. Now its time for you to deal with what sedimentary and volcanic rocks are like on a larger scale. Accommodation succession sequence stratigraphy refines. The sequence stratigraphy and depositional characteristics of fan. Pdf link pdf add to citation manager sequence stratigraphic framework for prediction of shallow water flow in the greater marsursa area, mississippi canyon area, gulf of mexico continental slope. P3 1,2department of geology, university of port harcourt, port harcourt, nigeria 3 department of petroleum engineering, nigerian agip oil company, port harcourt, nigeria abstract. Sequence stratigraphy is a branch of geology that attempts to subdivide and link sedimentary deposits into unconformity bound units on a variety of scales and explain these stratigraphic units in terms of variations in sediment supply and variations in the rate of change in accommodation space relative sea level, the combination of eustatic sea level and tectonic subsidence.
The depositional facies, sequence stratigraphy, palaeogeography, and coal accumulation in the fluviolacustrine middle jurassic xishanyao formation in the central zhunnan central segment of the southern junggar basin coalfield, northwest china were analyzed. Alongside 3d seismic, longreach horizontal drilling and the application of plate tectonics to exploration, sequence stratigraphy has been one of the greatest scientific advances within the petroleum geology industry of the last 50 years. The future of sequence stratigraphy depends on stratigraphers making observations with a common method so that physical frameworks can be clearly separated from interpretations of driving mechanisms. Sequence stratigraphy for petroleum play assessment pgs. The streamed video chalk board lecture below explains the ideal vail et al 1977 sequence, and considers this in terms of the component systems tracts, and their gross geometries as products of changes in relative sea level and the evolving accommodation space. By identifying and correlating different sedimentary units based on the controls on their supply, transport, and deposition characteristics, a robust depositional framework can be generated that helps to better understand the different petroleum system play elements. At applied stratigraphix we have described over 3 km of core on a cmscale from basins across the globe, as well as both carbonate and shale. Sequence stratigraphy is the study of rock relationships within timeequivalent depositional successions bounded by surfaces of erosion or nondeposition. Sequence stratigraphy is a very useful tool for interpreters of seismic and well data. Can sequence stratigraphic concepts be applied in mudrock. Introduction to the future of sequence stratigraphy. The sequence stratigraphic approach is a powerful way to integrate all scales of information, to.
Borehole log borehole log toto graphic grainsize log graphic grainsize log. Geology, sequence stratigraphy, and oil and gas assessment of. Download a copy of the uga stratigraphy labs sequence stratigraphy poster. The desert member of the blackhawk formation and the castlegate sandstone in the book cliffs of utah and colorado were analyzed to develop a model of sequence stratigraphy and facies architecture. Stratigraphy is the geologic knowledge about the processes by which sedimentary deposits form and how those deposits change through time and space on the earths surface. In the older sequence stratigraphic literature especially in the 1980s and 1990s, there was considerable discussion of type 1 and type 2 sequences, concepts that have largely since been abandoned or ignored.
Published online by the canadian society of petroleum. Sequence stratigraphic models for exploration and production. Accommodation succession sequence stratigraphy refines traditional. Oil i d t hoil industry has already invested billions. Sequence stratigraphy also enables us to make accurate predictions of source and seal potential well away from sample control, using regional information, and seismic and welllog data e. Sequence stratigraphy is used to analyze the ways that sedimentary basins fill, classify strata into a predictive depositional framework for correlation, describe the spatial and temporal relationships of a reservoir, and to correlate strata to global sea level records posamentier and allen, 1999. Enhancing sequence stratigraphic concepts through the integration of seismic stratigraphy and seismic geomorphology with process sedimentologypositive feedback loops that result in improved.
Remember that the submitted abstract is provisional. Sequence stratigraphy is the study of sedimentation patterns and facies relationships within a chronostratigraphic. Sequence stratigraphy is especially difficult to apply in many mudrock successions depositional sequences can be defined in many proximal mudrock successions but are difficult to define in distal successions. Posamentier exxon production research company houston, texas and p. It usually involves subdividing a sedimentary basin fill into individual sequence s of deposition hence the name, which can then be linked to changes in the two fundamental parameters of sediment supply and accommodation the amount of space available for deposition. We offer consulting services in seismic stratigraphy, sequence stratigraphy, sedimentology, geomodeling and sedimenthosted mineral deposits such as uranium, gold,platinum, silver, trona, potash and salt. It was a great experience, which exceeded all my expectations for these reasons. Sequence stratigraphy integrates all other types of stratigraphy and includes seismic stratigraphy figure 1. Sequence stratigraphy is the study of genetically related facies within a framework of chronostratigraphically significant surfaces. Focus on geology to define subsurface migration pathways.
Clay mineralogy, provenance, and sequence stratigraphy of. S gulf region, mudstones as unconventional shale gasoil reservoirs. In the case of sequence stratigraphy, the depositional sequence is defined as a relatively conformable succession of genetically related strata bounded by unconformities and their. Michael grammer and others published integrating depositional facies and sequence stratigraphy in characterizing unconventional reservoirs. He was corecipient of the aapg jules braunstein memorial award for best poster session paper in 1995 for work on coal sequence stratigraphy and the aapg international paper award in 1998 and was an aapg distinguished lecturer for 1999. S gulf region, mudstones as unconventional shale gasoil. Enhancing sequence stratigraphic concepts through the integration of seismic stratigraphy and seismic geomorphology with process sedimentologypositive feedback loops that result in improved stratigraphic and lithologic predictions. Sequence stratigraphy is a working methodology that emphasizes the importance of breaks in the stratigraphic record for the definition of sequences. Its a 36 x 24 pdf that you can print and hang for quick reference to the essential features of sequence stratigraphy. The future defined 2017 gcssepm conference, december 45, 2017, houston, texas because of hurricane harvey, we have been slowed in updating our website for the conference. Selected papers and illustrated abstracts of the eighth annual. Sequence stratigraphy is a type of stratigraphy that deals with the description, interpretation, classification, and nomenclature of sedimentary rocks based on their stratal stacking patterns and their stratigraphic relations. Current sequence stratigraphic concepts may clarify the controls on distribution and extents, thickness, and quality of eastern kansas coal seams.
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