Chapter 5 Seismic Reservoir Characterization -Books Pdf

CHAPTER 5 SEISMIC RESERVOIR CHARACTERIZATION
28 Dec 2019 | 31 views | 0 downloads | 13 Pages | 6.12 MB

Share Pdf : Chapter 5 Seismic Reservoir Characterization

Download and Preview : Chapter 5 Seismic Reservoir Characterization


Report CopyRight/DMCA Form For : Chapter 5 Seismic Reservoir Characterization



Transcription

SEISMIC RESERVOIR CHARACTERIZATION,Central Scotian Slope Study CANADA June 2016. Objectives, Characterize the sand distribution using the Marathon and Veritas 3D post stack seismic volumes in order to guide the lithofacies distribution for GDE mapping. Workflow and methodology, The acoustic inversion of the two seismic cubes has been performed using InterWell software to generate denoised synthetic seismic with enhanced frequency. bandwidth The different steps of the inversion are the following. Well to seismic calibration of the 5 wells available in the 3D Annapolis G 24 Balvenie B 79 Chebucto K 94 Crimson F 81 and Glenelg J 48. A priori model building using the key interpreted horizons to define the structural grid. Acoustic inversion, From well data acoustic impedance does not allow a clear discrimination of sands from shales and other lithologies Figure 2 Moreover the sand beds are. quite thin and potentially too thin for seismic resolution approximately 25m Therefore lithologies cannot be directly predicted from the acoustic impedance. volume resulting from inversion It was then decided to perform seismic facies analysis on the H L and M sand interpreted horizons using both supervised and. non supervised K means classification in order to characterize the lateral variations of these sand intervals The principle of seismic facies analysis is to. analyze the character of the seismic traces or the reflectivity trace at the reservoir level and relate its variations to the geological properties of the reservoir. The non supervised approach consists in a seismic trace classification here with the k means technique without giving any geological a priori. information from the wells It gives a neutral objective view of the seismic data set. With the supervised approach a priori geological information is introduced via the selection of typical wells grouped in n classes Each class is linked to. particular characteristics of the wells for example the porosity range to define n classes Training traces are extracted in the vicinity of the typical wells. within the thickness under investigation and are used to build a discriminant function in order to obtain n classes seismic facies maps. Several seismic attributes RMS Similarity have also been calculated on the 2 seismic volumes at different levels seabed K94 K101 K130 in order to 25000 m. highlight potential areas of interest and to identify the lateral variations. The maps resulting from the seismic reservoir characterization were then used as a guide for GDE maps construction. Figure 1 Location map of the Veritas and Marathon 3D cubes with the available wells The two cubes overlap in. the region of Annapolis G 24 and Crimson F 81 wells The Balvenie B 79 Chebucto K 90 and Glenelg J 48. wells are located within the Veritas survey only, Figure 2 a RHOB DT PHIE AI and facies logs at the Annapolis G 24 well Sands do not have a clear acoustic impedance signature allowing them to be differentiated from.
other lithologies b AI vs PHIE cross plot at the 5 wells available in the 3D below K101 Sands cannot be discriminated using acoustic impedance only. Objectives and methodology PL 5 1,SEISMIC RESERVOIR CHARACTERIZATION. Central Scotian Slope Study CANADA June 2016,Marathon acoustic inversion. The well to seismic calibration results on the Marathon seismic cube are satisfactory Figure 3 The estimated phase rotation 0 and the final results are coherent. with those of the previous seismic interpretation, The Marathon inversion gives satisfactory results with a good attenuation of random noise as illustrated by the noise maps Figure 4. Acoustic impedances resulting from inversion are likely to be impacted by the burial trend to remove this trend seismic characterization Seismic Facies Analysis. and attribute computation has been performed on the seismic reflectivity resulting from inversion a. Figure 3 Good well to seismic calibration results at the Annapolis G 24 and Crimson F 81 wells on the Marathon seismic Notice the strong attenuation. of seismic amplitudes below K94, Figure 4 Noise maps calculated on Marathon 200ms below top T50 before a and after b inversion The. correlation values are higher after inversion the inversion has attenuated random noise. PL 5 2 Marathon acoustic inversion,SEISMIC RESERVOIR CHARACTERIZATION.
Central Scotian Slope Study CANADA June 2016,Veritas acoustic inversion. The well to seismic calibration results on the Veritas seismic cube are satisfactory Figure 5. An AGC Amplitude Gain Control has been applied to the Veritas cube during seismic processing Figure 6 Because of this process seismic amplitudes are. not preserved Acoustic inversion is strongly impacted by this amplitude homogenization and inversion results are therefore not reliable. The Veritas seismic cube which covers both the shelf and slope areas has however still been useful for direct seismic attribute interpretation Seismic. characterization Seismic Facies Analysis and attribute computation has thus been performed on the raw seismic volume NE SW. Figure 5 Good well to seismic calibration results at the Annapolis G 24 and Crimson F 81 wells on Veritas seismic The effect. of the AGC is clearly visible on the calibration tables amplitudes are boosted in the lower part below K94 in comparison with. Marathon 3D seismic data, Figure 6 Comparison between a seismic section through the Annapolis G 24 well from the Marathon a and Veritas seismic. cubes b An AGC has been applied on this cube during processing seismic amplitudes are not preserved acoustic. inversion cannot provide reliable results,Veritas acoustic inversion PL 5 3. SEISMIC RESERVOIR CHARACTERIZATION,Central Scotian Slope Study CANADA June 2016. Seismic characterization at H Sand level on the Marathon seismic data. Both supervised and unsupervised seismic facies maps were generated at the H Sand level on the Marathon 3D cube Figure 8. The unsupervised seismic facies map was built with three classes red blue and green which present a clear NNW SSE trend compatible with. sand deposit direction The Annapolis G 24 well in which the thickest sand was found is located in the red class whereas the Crimson F 81. well with lower sand thickness Figure 11 in plate 5 5 is located in the blue class Robot traces present much larger amplitudes for green and. red classes Analogies with the RMS map presented in Figure 9 are evident with the red class clearly linked with high RMS amplitudes A first. interpretation is then to define green and red classes as sand classes. Supervised classification has been guided by traces extracted around the two wells assigning them to two classes the first or red class is linked. to Annapolis G 24 the sandier well The other blue class should reflect the characteristics of Crimson F 81 Observations given for. unsupervised classification are confirmed here with the red class associated with the presence of more sand and the blue class with lessor. amounts of sand, Figure 7 Seismic section in the Marathon cube through Annapolis G 24 showing the location of the H L and M.
Sand interpreted horizons on which seismic characterization was performed. Figure 8 Unsupervised a and supervised b seismic facies maps calculated at the H Sand level 48ms below top H Sand on Marathon seismic reflectivity from inversion The. supervised approach is composed of two classes guided respectively by Annapolis G 24 and Crimson F 81 The two maps are well correlated the circled pattern which is. present on both maps may correspond to sand infilling 5000 m. Figure 9 RMS map calculated at H Sand 48ms below top H Sand The circled energy anomaly corresponds. to a topographic high bounded by a fault The features of this map are well correlated with those of the. seismic facies maps,PL 5 4 Seismic facies analysis at H Sand. SEISMIC RESERVOIR CHARACTERIZATION,Central Scotian Slope Study CANADA June 2016. Seismic characterization at H Sand level on the Veritas seismic data. An unsupervised seismic facies map was generated on Veritas seismic at the H sand level Figure12 Because of the post processing applied to these data. AGC the seismic facies analysis was conducted on the raw seismic traces instead of reflectivity traces In the zone covered by both Veritas and Marathon. surveys the unsupervised seismic facies map appears much noisier than Marathon s Figure 8 but presents the same global features with a clear NNW ESE. trend The robot traces are also very similar to those obtained with Marathon cube On the platform area where Chebucto and Glenelg wells are located the. supposed red sand follows a more coastal trend this behavior is consistent with Dionisos modeling PL 6 2. 1D seismic modeling test, A 1D modeling test was performed at Annapolis G 24 the AI log was modified to mimic a thickening of the sand interval at the H Sand level from 3 m to 12 m to. evaluate its impact on the seismic response Figure 10 Synthetic and reflectivity traces RC were then generated from the modified AI log The sand layer. thickening leads to a change of the seismic response the original reflectivity trace in green evolves to the red trace presenting larger negative amplitude This is. what is observed on robot traces indicating that the red class may correspond to a thickening of the sand layer Therefore the red areas evidenced by the. seismic facies maps mostly located around Glenelg J 48 and Chebucto K90 which present thicker H Sands Figure 11 and at the east of Annapolis G 24 and. Crimson F 81 may correspond to sandier areas,Poor seismic. data quality, Figure 10 a Modeling on the AI log at Annapolis G 24 of an increase of sand thickness from 3 to 12 m b Synthetic and reflectivity logs generated.
from the original green and modelled red AI A change of the seismic trace can be observed due to the thickening of the sand layer. Figure 12 Unsupervised seismic facies map calculated at the H Sand level 48 ms below top H Sand on Veritas seismic. Based on the 1D modeling results the red traces may correspond to a sand thickening The red zones on the map might. Figure 11 Lithology logs at Glenelg Chebucto,therefore correspond to sandier areas. Annapolis and Crimson 48ms below H Sand,Glenelg and Chebucto have more sands at the H. Sand level,Seismic facies analysis at H Sand PL 5 5. SEISMIC RESERVOIR CHARACTERIZATION,Central Scotian Slope Study CANADA June 2016. Seismic characterization at the L Sand level, Both supervised and unsupervised seismic facies maps have.
been generated at the L Sand level on Marathon and Veritas. Figures 15 and 16 using the same techniques as for the H. Sand The seismic facies are less organized than at the H. Sand level this could be due to the poor seismic data quality. and the resulting less accurate horizon picking,Figure 13 Lithology logs at. Annapolis and Crimson,48ms below L Sand,Annapolis has more sands at. the L Sand level, Figure 14 Seismic section in the Marathon cube going through the 2 structures highlighted in Figure 15. Figure 16 Unsupervised seismic facies map calculated at the L Sand level 48ms below. top L Sand on Veritas seismic The NNW SSE trend is still visible in the basin at this level. Figure 15 Unsupervised a and supervised b seismic facies maps calculated at the L Sand. level 48ms below top L Sand on Marathon seismic reflectivity from inversion The supervised Figure 17 Similarity map at L Sand with isolines. approach uses two classes guided by Annapolis G 24 and Crimson F 81 wells The dark line. in Figure a indicates the location of the seismic section shown in Figure 14. PL 5 6 Seismic facies analysis at L Sand,SEISMIC RESERVOIR CHARACTERIZATION. Central Scotian Slope Study CANADA June 2016,Seismic characterization at the M Sand level.
Both supervised and unsupervised seismic facies maps were generated at. the M Sand level on Marathon and Veritas Figure 20 and 21 No clear. organization of the seismic facies can be observed at this level this could. be due to the poor seismic data quality and the resulting less accurate. horizon picking,Figure 18 Lithology logs at,Annapolis and Crimson 48ms. Poor seismic,below M Sand Annapolis has data quality. more sands at the M Sand level, Figure 19 Seismic section in the Marathon cube through the two structures highlighted in Figure 20. Figure 21 Unsupervised seismic facies map calculated at the M Sand level 48ms below top M. Sand on Veritas 3D seismic data There is no clear organization of the seismic facies. Figure 20 Unsupervised a and supervised b seismic facies maps calculated at the M Sand. level 48ms below top M Sand on Marathon seismic reflectivity from inversion The supervised. Figure 22 Similarity map at M Sand with isolines, approach is composed of two classes green and blue guided by Annapolis G 24 and Crimson F. 81 wells The dark line in Figure a corresponds to the seismic line shown in Figure 19. Seismic facies analysis at M Sand PL 5 7,SEISMIC RESERVOIR CHARACTERIZATION.
Central Scotian Slope Study CANADA June 2016,Attribute generation at seabed. The similarity maps calculated on the two seismic cubes at the seabed level show clear evidence of pockmarks which are also clearly. visible on seismic sections Figure 23, These pockmarks are more visible on the shelf but can also be identified on the slope. Figure 23 a Similarity map calculated at seabed 48ms below seabed on Veritas seismic It highlights the presence of pockmarks which are also. observed on the seismic section b along the white dotted line of Figure a These pockmarks evidence gas rising up to the surface. PL 5 8 Attribute maps at Seabed,SEISMIC RESERVOIR CHARACTERIZATION. Central Scotian Slope Study CANADA June 2016,Attribute generation at K94. The energy anomalies located in the upper part of the RMS maps zones 1 and 2 on Figures 24 and 25 are. bounded by listric faults They are associated with two small basins located at the base of prograding wedges. Zone 3 corresponds to a third small basin located slightly downslope from basin 2 It is limited by roll over. structures Figure 24 In contrast to basin 1 the energy anomaly is restricted to the south west part of the. basin Figure 24a The low energy portion corresponds to a channel with an upslope downslope orientation. The high energy area is located in the central part of the small basin. Note that the K94 closes the small basins Figure 24b and 25b. Figure 24 a RMS map calculated at K94 on Marathon, seismic showing three energy anomaly zones b Seismic.
section on Marathon through zone 2 and 3,SW NE NW SE. Figure 24 2 Close up of,zone 2 of Figure 21,Figure 24 3 Close up. of zone 3 of Figure 21,Figure 25 a RMS map calculated at K94 on Marathon. seismic showing three energy anomaly zones b Seismic. section on Marathon through zone 1 2000 m,Attribute maps at K94 PL 5 9. SEISMIC RESERVOIR CHARACTERIZATION,Central Scotian Slope Study CANADA June 2016.
Attribute generation at K101 a, Zone 1 Figure 26 corresponds to a faulted turtle back The energy is concentrated at the top of the structure. Figure 26a high amplitudes are also present inside the structure Figure 26b b. Zone 2 Figure 27 and section 2 also corresponds to a roll over with high energy at the summit It is bounded. by a listric fault at the southeast, An amplitude anomaly is present in the upper part of the onshore offshore channel defined by zone 3 Figure. 27 and section 3, Zone 4 Figure 27 and section 4 is a slightly inverted The energy anomaly corresponds to the top of the. structure and is bounded by faults,2000 m 5000 m, Figure 26 a RMS map calculated at K101 on Marathon. seismic showing one energy anomaly zone b Seismic,section on Marathon through zone 1.
NW 50 Amplitude 50 SE, Figure 27 a RMS map calculated at K101 on Marathon seismic showing three. 4000 m energy anomaly zones 2 Seismic section on Marathon through zone 2 3 Seismic. section on Marathon through zone 3 4 Seismic section on Marathon through zone 4. PL 5 10 Attribute maps at K101,SEISMIC RESERVOIR CHARACTERIZATION. Central Scotian Slope Study CANADA June 2016,Attribute generation at K130 a. Zone 1 Figure 28a corresponds to the sediment infill of a small basin probably related to deep seated salt. movements The energy anomaly is located in the axial part of the basin and is limited to the east by a north south. striking fault This energy anomaly likely corresponds to a sandsheet deposit in this small basin Figure 28b. Zone 2 Figure 29 corresponds to the sediment infill of a small basin related to deep seated salt movement and. growth fault structures It is located at the base of a prograding wedge the energy anomaly is concentrated in the. southwest part of the basin This area appears to correspond to a sandsheet deposit Figure 29A. Zone 3 Figure 29 corresponds to an anomaly on the flank of a turtle back structure The K130 caps a complex. set of inverted channels The high energies are located at the top or on the flank of this structure Figure 29B It is. limited to the northeast by a salt diapir, Figure 28 a RMS map calculated at K130 on Marathon. seismic showing one energy anomaly zone b Seismic,section on Marathon through zone 1.
Figure 29 2 Close up of,zone 2 of Figure 26,Figure 29 3 Close up. of zone 3 of Figure 26, Figure 29 a RMS map calculated at K130 on Marathon. seismic showing three energy anomaly zones b Seismic 5000m. section on Marathon through zone 2 and 3,Attribute maps at K130 PL 5 11.


Related Books

Sape Edang Bolenj - ISI

Sape Edang Bolenj ISI

urusan Etnomusikologi, k. ompetensi. Penciptaan Musik Etnis, Fakultas Seni . Pertunjukan, Institut Seni Indonesia Yogyakarta. Sebuah kecintaan dan kagum akan indahnya karya seni warisan para leluhur, telah memotivasi penulis untuk selalu mengekspresikan diri melalui karya seni yang dilatarbelakangi oleh sebuah tradisi. Hambatan serta ...

MANTRA WEDA DALAM UPACARA SATU DI PENDOPO AGUNG TROWULAN ...

MANTRA WEDA DALAM UPACARA SATU DI PENDOPO AGUNG TROWULAN

MANTRA WEDA DALAM UPACARA SATU SURO. DI PENDOPO AGUNG TROWULAN JAWA TIMUR . Oleh: . Widiyarti Rochmaningtiyas Caturputri . 101 0389 015 . TUGAS AKHIR PROGRAM STUDI S-1 ETNOMUSIKOLOGI

MODEL RAILROAD MANAGER

MODEL RAILROAD MANAGER

support on your railroad, you can create shipping and receiving activity for freight. Industry traffic leads to waybill generation and the capability to create manifests for trains. Tools to quickly generate traffic are easy to use. Schedules for regular passenger or freight are supported. Extra trains can be quickly defined. Time and

Before the U.S. Surface Transportation Board

Before the U S Surface Transportation Board

performance data is provided be standardized in comprehensive Excel spreadsheets versus the current hodge-podge of differing spreadsheet formats and basic PDF files, the latter of which are impractical for extracting, analyzing and comparing data in a useful format. Fourth, what matters most to companies storing, handling, processing and shipping and receiving agricultural commodities is the ...

WHITEPAPER technology for your entire business

WHITEPAPER technology for your entire business

2 TECHNOLOGY FOR YOUR ENTIRE BUSINESS BETTER BUSINESS PRACTICES By the very nature of their businesses, distributors have unique processes including order management, inventory management, warehouse management, purchasing, ?nancial management, customer relationship management, business reporting and analysis, e-business, and much more.

Elogio del camminare Suggerimenti di lettura della ...

Elogio del camminare Suggerimenti di lettura della

lunga marcia / Stephen King (Richard Bachman) - Sperling & Kupfer, [1998] Inventario BLA 7226 Collocazione DEP 813 KIN L'uomo in fuga / Stephen King (Richard Bachman).- Sperling paperback, 2003 Inventario BLA 20313 Collocazione DEP 813 KIN L'uomo che cammina / Alan Warner - U. Guanda, 2003 Inventario BLA 13850 Collocazione G 823 WAR

LMS5xx LMS511-12100 Heavy Duty

LMS5xx LMS511 12100 Heavy Duty

LMS511-12100 Heavy Duty | LMS5xx 2D LIDAR SENSORS Ambient light immunity 70,000 lx General notes Note on use The sensor does not constitute a safety component as defined by relevant legislation on ma-chine safety. Classifications ECl@ss 5.0 27270990 ECl@ss 5.1.4 27270990 ECl@ss 6.0 27270913 ECl@ss 6.2 27270913 ECl@ss 7.0 27270913 ECl@ss 8.0 ...

MAKHLUK HIDUP - Universitas Pendidikan Indonesia

MAKHLUK HIDUP Universitas Pendidikan Indonesia

Setiap bunga terbentuk pada tangkai khusus, yaitu tangkai bunga (pedicellus). Pada bagian bawah yang membesar terdapat dasar bunga (receptacullum). Pada bagian ini tersusun bagian-bagian bunga yang berupa daun kelopak (sepalum) secara kolektif disebut calyx. Daun mahkota ( petalum) yang secara kolektif disebut corolla.

SKRIPSI KEDUDUKAN ANAK PEREMPUAN SEBAGAI AHLI WARIS ...

SKRIPSI KEDUDUKAN ANAK PEREMPUAN SEBAGAI AHLI WARIS

canda, tawa, kebersamaan sebagai bagian dari keluarga. Tidak mengenal angkatan dan selalu mau menolong. Tak dapat penulis sebutkan satu persatu karena kalian terlalu banyak hahaha. Tuhan tau itu, dan akan selalu memberkati kalian. Amin. 21. Kepada teman sekaligus saudara Frecilia Supit Allorante ST,

Removal of Volatile Organic Compounds from polluted air

Removal of Volatile Organic Compounds from polluted air

Removal of Volatile Organic Compounds from polluted air Faisal I. Khan *, Aloke Kr. Ghoshal Department of Chemical Engineering, Birla Institute of Technology and Science, Pilani-333 031, Rajasthan, India Abstract Volatile Organic Compounds (VOCs) are among the most common air pollutants emitted from chemical, petrochemical, and allied ...