Fault Seal Analysis from Seismic and Well Data

Klarner, S.; Kirnos, D.G.; Klarner, O.; Ruzlyaeva, N.; Voykov, G.G.; Zhukova, O.S.

doi:10.3997/2214-4609.201602321

Cited by 2 publications

(2 citation statements)

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“…We simply refer to this sealing mechanism as a "primary seal" or "primary juxtaposition seal". The primary juxtaposition seal is established when an impermeable lithological layer (e.g., shale) comes into contact with a reservoir lithological layer at the fault location [45] . In the seismic section (as seen in Figure 5(b)), the lithologies of reservoir A (SZT Formation) and B (PO Formation) from one fault block are juxtaposed against non-reservoir shale lithologies (PA and YA Formations) from the opposing fault block.…”

Section: Fault-sealing Behaviorsmentioning

confidence: 99%

Seismic stratigraphy and structural analysis in the determination of petroleum play within Salin basin, Myanmar

Aung,

Maw,

Moe

et al. 2023

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<p>This study presents a new interpretation of the seismic stratigraphic unit equivalent to the Late Cretaceous to Pliocene formations in the Salin basin. Many researchers investigated the outcrops of the stratigraphic succession of the Salin basin but there is a lack of comprehensive analysis by seismic interpretation. This study provides a comprehensive description of the structural development within the Salin basin, enhancing our comprehension of the regional stratigraphic evolution of the examined region. Seismic sequences were delineated using a combination of horizon mapping, internal reflection configuration, termination patterns, and thickness analysis. We identified two distinct mechanisms for lateral fault seals: (1) primary juxtaposition seals and (2) secondary fault rock seals (also known as membrane seals). Once the hydrocarbons are matured within the source formations (Late Cretaceous to Early Oligocene shales units): Kabaw (KB); Laungshe (LA); Tabyin (TA); Pondaung (PO); Yaw (YA); and Shwezettaw (SZT), they are migrated towards the reservoir formations (Pondaung (PO), Shwezettaw (SZT), Padaung (PA), Okhmintaung (OHK), and Kyaukkok (KK)) through these predicted paths. Generally, the primary migration takes place along the fault or fractured planes or pores within rock units. In the southwestern limb of the Yenangyaung anticline, the disharmonic folding and upward bending of the KK, PY, OHK, and PA formations resulted in the deformation of ductile strata within the PA Formation, forcing them towards the peripheral synclines. The main deep fore-thrust in the southwestern limb of the Chauk anticline rooted within the PA Formation flattened up while approaching the OHK and PY formations. Chauk anticlinal axis above the PY and OHK detachment level are more migrated toward the northeast. As a result, above the crest of the deep anticline, the shallow low-angle fore-thrust pushed up into the growth strata, leading to the uplift of the YA and SZT formations within the Letpando anticline. YA Formation crops out locally along the axis of the structure and is the major seal, with sandstones in the underlying Eocene PO Formation being the main reservoir.</p>

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Section: Fault-sealing Behaviorsmentioning

confidence: 99%

Seismic stratigraphy and structural analysis in the determination of petroleum play within Salin basin, Myanmar

Aung,

Maw,

Moe

et al. 2023

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“…The fault plane that was bounding the reservoir layers is assessed in terms of sealing or leaking behavior. Thus, the migration pathway of hydrocarbon can be traced [5,6].…”

Section: Introductionmentioning

confidence: 99%

Reservoir Compartment Assessment: A Case Study of Bangko and Bekasap Formation, Central Sumatra Basin Indonesia

Haris¹,

Anindya

Indra³

et al. 2018

GEOMATE

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ABSTRACT:The reservoir compartment assessment for a case study of the Agur field, Central Sumatra Basin has been successfully carried out by using fault seal analysis (FSA). The objective of this paper is to asses subsurface fault properties in term of the fault sealing that was defining the hydrocarbon reservoir compartment. In this work, the FSA was performed by integrating juxtaposition, shale gouge ratio (SGR) and transmissibility analysis over fault plane that was identified within reservoir layers on the Bangko and Bekasap formation. The juxtaposition seal is intended to assess how the reservoir layer is juxtaposed across the fault plane over either reservoir or non-reservoir layer. The SGR analysis is applied to estimate the shale content in the fault plane, which is caused by the fault movement of sequence stratigraphy. The last analysis of transmissibility is carried out to calculate the capacity of a reservoir to drain the hydrocarbon through a fault plane. Faults architecture (throw, heave, and orientation) and the reservoir layer target were identified based on 3D seismic and well log data interpretation. The FSA is applied to nine faults that formed nine reservoir compartments within three reservoir layers, which are obtained from 3D seismic and well log interpretation. The fault characteristics were classified and the fault seal distribution map was produced to identify the reservoir connectivity among the faults. The FSA results show that nine identified compartments in the first reservoir layer are clustered into five compartments. In addition, the FSA clustered nine identified compartments in the second reservoir layer into four compartments. In contrast, nine compartments in the third reservoir layer were connected each other that are clustered into one compartment. These results are useful not only for evaluating future hydrocarbon traps but also for future field development.

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Fault Seal Analysis from Seismic and Well Data

Cited by 2 publications

References 0 publications

Seismic stratigraphy and structural analysis in the determination of petroleum play within Salin basin, Myanmar

Seismic stratigraphy and structural analysis in the determination of petroleum play within Salin basin, Myanmar

Reservoir Compartment Assessment: A Case Study of Bangko and Bekasap Formation, Central Sumatra Basin Indonesia

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