Rock physics modeling and 4D seismic feasibility study in one of the Iranian carbonate reservoirs

Shiri, Sadegh; Falahat, Reza

doi:10.1016/j.jappgeo.2019.103855

Cited by 7 publications

(8 citation statements)

References 14 publications

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“…Velocity sensitivity is the phenomenon that particles in reservoir rocks migrate and block the roar channel due to the change in fluid flow velocity, which leads to a change in reservoir rock permeability [20]. A high-pressure displacement pump was used to pump the simulation fluid through the sample, and the confining pressure was slowly adjusted to 2.0 MPa.…”

Section: Materials and Methodologymentioning

confidence: 99%

Development scheme screening considering reservoir damage based on the AHP model

Yang

Jiang

et al. 2023

SN Appl. Sci.

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The development process of oil and gas fields is affected by engineering and geology. Reservoir damage is significant as a bridge connecting these two disciplines. The life cycle of oil and gas fields can be prolonged by making development plans that consider reservoir damage. Therefore, this study performed experiments and discusses a Cretaceous reservoir development in the Chun17 block of the Chunguang Oilfield. We have carried out five sensitivity experiments on typical cores from the block, and analyzed lithology, physical properties, and crude oil. A mathematical model based on the Analytic Hierarchy Process (AHP) was then established based on the core data.Overall, the reservoir in the study area has ultra-high porosity and high permeability. The reservoir has moderately strong water sensitivity (damage rate is 38 ~ 90%) and moderately strong alkali sensitivity (damage rate is 22 ~ 75%). The crude oil belongs to extra-heavy oil reservoirs (containing 2.43% wax, 0.96% sulfur, 20.25 m% gum, 7.35 m% asphalt, 38.26 m% saturated hydrocarbon, and 27.51 m%). The crude oil is sensitive to temperature changes. Based on the AHP model analysis, the development scheme chooses the third (weight 0.1757) of the conventional analytic results of AHP; the Thermal oil production C1 scheme has the most stable future trend and appears to be the best option. In the next step, using fire flooding technology to develop the reservoir will benefit the most economically. The workflow consisting of "conclusion of reservoir experiment → AHP mathematical modeling → verification of relative permeability of high-temperature oil and water → verification of trial production" is simple and effective. The findings of this study can help to better understand the idea and process of making development plans for sensitive oil and gas fields through reservoir evaluation. Combining experimental data with mathematical modeling can find a balanced combination point in qualitative and quantitative analysis. Whether this combination point is correct can be verified by field engineering practice.

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Section: Materials and Methodologymentioning

confidence: 99%

Development scheme screening considering reservoir damage based on the AHP model

Yang

Jiang

et al. 2023

SN Appl. Sci.

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“…During the Neoproterozoic, the exposure of Gondwana, accompanying the amassing of continents at a huge scale, led to the configuration of isolated unit Pangaea (Stampfli et al, 2013). The Indian Plate was once part of Gondwanaland and separated because of fragmentation (Powell et al, 1979).…”

Section: Regional Geology and Tectonic Settingsmentioning

confidence: 99%

“…This is an area where pore types, minerals, and lithofacies affect the velocities and impedances similarly to the porosity values (Eberli et al, 2003). Carbonate reservoirs account for about half of hydrocarbon production globally, and thus there is a need for the development of rock physics modeling to avoid risk in carbonate exploration (Shiri & Falahat, 2019;Chopra & Marfurt, 2007). The main reason behind this is heterogeneity in the carbonate reservoirs and their pore type distribution.…”

Section: Introductionmentioning

confidence: 99%

An integrated approach to evaluate the hydrocarbon potential of Jurassic Samana Suk Formation in Middle Indus Basin, Pakistan.

Miraj

Javaid²,

Ahsan

2021

KJS publishes peer-review articles in Mathematics, Computer Sci

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The Indus Basin is considered as prolific hydrocarbon-bearing province of Pakistan. The study area is located in the Middle Indus Basin. Two wells (Bagh-X-01 and Budhuana-01) were drilled in the vicinity of the study area to determine the hydrocarbon potential of the area. Both wells show no hydrocarbon reserves and are thus abandoned. The present study emphasizes two-dimensional subsurface seismic interpretation and rock physics evaluation to estimate reservoir properties of the Jurassic Samana Suk Formation. Data from nine 2-D seismic lines and two wells have been utilized to evaluate the potential. The time contour maps indicate the existence of subsurface structural features in the study area. With the help of the 3-D geological model, the faults are marked in the Samana Suk Formation and the structure is identified as a monocline. The 3-D geological modeling results also reveal that Samana Suk Formation tends to become thin in the northeast, and thick in the southwest. The petrophysical interpretation was performed to find the hydrocarbon potential of the Formation. The cross plot between P-impedance and Vp/Vs ratio shows that the lithology cannot be differentiated by the logs. Rock physics parameters such as Poisson’s ratio, bulk modulus, shear modulus, shear wave velocity, primary wave velocity, Vp/Vs ratio, and density indicate that there are no considerable hydrocarbon reserves in the Samana Suk Formation.

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“…In addition, V s can be predicted by rock physics relationships. In 2020, Shiri and Falahat used a hybrid rock physics method to estimate pressure changes from acoustic impedance (Shiri and Falahat, 2020). Later, Dalvand and Falahat used modified Gassmann's relationships to estimate V s from wire-line log data (Dalvand and Falahat, 2021).…”

Section: Introductionmentioning

confidence: 99%

Prediction of Shear Wave Velocity and Modification of Castagna and Carroll Relationships in One of the Iranian Oil Fields

Mahmoudian

Shiri

Vaezian

2022

MGPB

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Shear wave velocity is one of the essential parameters for describing hydrocarbon reservoirs that have several applications in petrophysical, geophysical, and geomechanical studies. Shear wave velocity usually does not exist in all wells, especially in old oil fields. In the current study, two equations of Carroll and Castagna have been modified, and linear and nonlinear multi-regressions were used to estimate shear wave velocity in an oil reservoir in southwestern Iran. Initially, compressional wave velocity and porosity were determined as the most effective wire-line logs on shear wave velocity by comparing their correlations. Then, two equations of Carroll and Castagna were modified. In addition, new equations based on porosity and compressional wave velocity for estimating the shear wave velocity were obtained. Shear wave velocity was estimated by new exponential equations in the wells of the current oil field with excellent goodness of fit by determination coefficients of 0.80 in the whole well, 0.72 in the Ghar-Shale-1, and 0.78 in Ghar-Shale-3 in X-07 well.

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Rock physics modeling and 4D seismic feasibility study in one of the Iranian carbonate reservoirs

Cited by 7 publications

References 14 publications

Development scheme screening considering reservoir damage based on the AHP model

Development scheme screening considering reservoir damage based on the AHP model

An integrated approach to evaluate the hydrocarbon potential of Jurassic Samana Suk Formation in Middle Indus Basin, Pakistan.

Prediction of Shear Wave Velocity and Modification of Castagna and Carroll Relationships in One of the Iranian Oil Fields

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