scholarly journals Depositional facies and reservoir characteristics of the Early Cretaceous Lower Goru Formation, Lower Indus Basin Pakistan: Integration of petrographic and gamma-ray log analysis

Petroleum ◽  
2021 ◽  
Author(s):  
Qamar UZ. Zaman Dar ◽  
Pu Renhai ◽  
Shahid Ghazi ◽  
Shakeel Ahmed ◽  
Rana Imran Ali ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Gamma Ray ◽  
Indus Basin ◽  
Log Analysis ◽  
Depositional Facies ◽  
Reservoir Characteristics ◽  
Lower Indus Basin ◽  
Lower Goru Formation ◽  
Gamma Ray Log

scholarly journals Evaluation of Gas Potential in Early Cretaceous Shale Lower Indus Basin, Pakistan

2020 ◽  
Vol 11 (1) ◽  
pp. 123-129
Author(s):  
Bilal Ahmed ◽  
Mohibullah Mohibullah ◽  
Sadiq Jalal ◽  
Shabeer Ahmed Abbasi ◽  
Abdul Salam Khan ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Vitrinite Reflectance ◽  
Empirical Relation ◽  
Indus Basin ◽  
Peak Oil ◽  
Gas Generation ◽  
Geochemical Parameters ◽  
Lower Indus Basin ◽  
Lower Goru Formation ◽  
Gas Potential

The shale gas potential of the early Cretaceous Talhar shale member of the lower Goru Formation in lower Indus basin of Sanghar district, Sindh province, has been evaluated using 2D seismic and well logs data. Graphical and empirical techniques were applied to calculate various geochemical parameters for the evaluation of shale plays. Total Organic Carbon (TOC) is calculated by Passey's (∆LogR) Overlay technique and its values are about 2.44 wt.%. Vitrinite Reflectance (Ro) is estimated by graphical and empirical relation and the value lies between 0.95-1.0 which implies that the Talhar shale member is in peak oil and initial gas generation phase. Log-derived Maturity Index (LMI) is calculated by NPHI, RHOB or density log and uranium logs. The average value is about 0.55 which reflects that the formation is probably in the initial maturation phase. Kerogen Volume (Vk) is estimated by empirical relation using RHOB log as input and it is about 13 wt. % which reflects that the formation has enough potential of oil/gas expulsion. The results are compared and validated with a study of the adjacent field of the same basin. This study reveals that Talhar member of lower Goru Formation could be the future probable potential unconventional reservoir for exploration in lower Indus basin of Pakistan.

scholarly journals Evaluation of Gas Potential in Early Cretaceous Shale Lower Indus Basin, Pakistan

2020 ◽  
Vol 11 (1) ◽  
pp. 123-129
Author(s):  
Bilal Ahmed ◽  
Mohibullah Mohibullah ◽  
Sadiq Jalal ◽  
Shabeer Ahmed Abbasi ◽  
Abdul Salam Khan ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Vitrinite Reflectance ◽  
Empirical Relation ◽  
Indus Basin ◽  
Peak Oil ◽  
Gas Generation ◽  
Geochemical Parameters ◽  
Lower Indus Basin ◽  
Lower Goru Formation ◽  
Gas Potential

The shale gas potential of the early Cretaceous Talhar shale member of the lower Goru Formation in lower Indus basin of Sanghar district, Sindh province, has been evaluated using 2D seismic and well logs data. Graphical and empirical techniques were applied to calculate various geochemical parameters for the evaluation of shale plays. Total Organic Carbon (TOC) is calculated by Passey's (∆LogR) Overlay technique and its values are about 2.44 wt.%. Vitrinite Reflectance (Ro) is estimated by graphical and empirical relation and the value lies between 0.95-1.0 which implies that the Talhar shale member is in peak oil and initial gas generation phase. Log-derived Maturity Index (LMI) is calculated by NPHI, RHOB or density log and uranium logs. The average value is about 0.55 which reflects that the formation is probably in the initial maturation phase. Kerogen Volume (Vk) is estimated by empirical relation using RHOB log as input and it is about 13 wt. % which reflects that the formation has enough potential of oil/gas expulsion. The results are compared and validated with a study of the adjacent field of the same basin. This study reveals that Talhar member of lower Goru Formation could be the future probable potential unconventional reservoir for exploration in lower Indus basin of Pakistan.

scholarly journals Evaluation of Gas Potential in Early Cretaceous Shale Lower Indus Basin, Pakistan

2020 ◽  
Vol 11 (1) ◽  
pp. 123-129
Author(s):  
Bilal Ahmed ◽  
Mohibullah Mohibullah ◽  
Sadiq Jalal ◽  
Shabeer Ahmed Abbasi ◽  
Abdul Salam Khan ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Vitrinite Reflectance ◽  
Empirical Relation ◽  
Indus Basin ◽  
Peak Oil ◽  
Gas Generation ◽  
Geochemical Parameters ◽  
Lower Indus Basin ◽  
Lower Goru Formation ◽  
Gas Potential

The shale gas potential of the early Cretaceous Talhar shale member of the lower Goru Formation in lower Indus basin of Sanghar district, Sindh province, has been evaluated using 2D seismic and well logs data. Graphical and empirical techniques were applied to calculate various geochemical parameters for the evaluation of shale plays. Total Organic Carbon (TOC) is calculated by Passey's (∆LogR) Overlay technique and its values are about 2.44 wt.%. Vitrinite Reflectance (Ro) is estimated by graphical and empirical relation and the value lies between 0.95-1.0 which implies that the Talhar shale member is in peak oil and initial gas generation phase. Log-derived Maturity Index (LMI) is calculated by NPHI, RHOB or density log and uranium logs. The average value is about 0.55 which reflects that the formation is probably in the initial maturation phase. Kerogen Volume (Vk) is estimated by empirical relation using RHOB log as input and it is about 13 wt. % which reflects that the formation has enough potential of oil/gas expulsion. The results are compared and validated with a study of the adjacent field of the same basin. This study reveals that Talhar member of lower Goru Formation could be the future probable potential unconventional reservoir for exploration in lower Indus basin of Pakistan.

scholarly journals Depositional Environment and facies analysis of Useni- 1, Niger Delta Basin, using well logs, core data

2019 ◽  
Vol 7 (1) ◽  
pp. 58
Author(s):  
G. O. Aigbadon ◽  
E. O. Akpunonu ◽  
S. O. Agunloye ◽  
A. Ocheli ◽  
O. O .Akakaru
Keyword(s):  
Gamma Ray ◽  
Water Saturation ◽  
Oil Field ◽  
Well Logs ◽  
Depth Range ◽  
Depositional Facies ◽  
Core Data ◽  
Delta Plain ◽  
Niger Delta Basin ◽  
Gamma Ray Log

This study was carried out integrating well logs and core to build reservoir model for the Useni-1 oil field. Core data and well logs were used to evaluate the petrophysical characteristics of the reservoirs. The paleodepositional environment was deduce from the wells and cores data. The depositional facies model showed highly permeable channels where the wells where positioned. The environments identified that the fluvial channel facies with highly permeable zones constituted the reservoirs. Four reservoirs were mapped at depth range of 8000ft to 8400ft with thicknesses varying from 20ft to 400ft. Petrophysical results showed that porosity of the reservoirs varied from 12% to 28 %; permeability from 145.70 md to 454.70md; water saturation from 21.65% to 54.50% and hydrocarbon saturation from 45.50% to 78.50 %. Core data and the gamma ray log trends with right boxcar trend indicate fluvial point bar and tidal channel fills in the lower delta plain setting. By-passed hydrocarbons were identified in low resistivity pay sands D1, D2 at depth of 7800 – 78100ft in the field.  

scholarly journals WELL LOGS ANALYSIS TO ESTIMATE THE PARAMETERS OF SAWAN-2 AND SAWAN-3 GAS FIELD

2020 ◽  
Vol 5 (2) ◽  
pp. 69-75
Author(s):  
Raja Asim Zeb ◽  
Muhammad Haziq Khan ◽  
Intikhab Alam ◽  
Ahtisham Khalid ◽  
Muhammad Faisal Younas
Keyword(s):  
Physical Properties ◽  
Oil And Gas ◽  
Water Saturation ◽  
Total Porosity ◽  
Effective Porosity ◽  
Indus Basin ◽  
Log Analysis ◽  
Neutron Density ◽  
Gas Field ◽  
Lower Goru Formation

The lower Indus basin is leading hydrocarbon carriage sedimentary basin in Pakistan. Evaluation of two sorts out wells namely Sawan-2 and Sawan-3 has been assumed in this work for estimation and dispensation of petro physical framework using well log data. The systematic formation assessment by using petro physical studies and neutron density cross plots reveal that lithofacies mainly composed of sandstone. The hydrocarbon capability of the formation zone have been mark through several isometric maps such as water saturation, picket plots, cross plots, log analysis Phie vs depth and composite log analysis. The estimated petro physical properties shows that reservoir have volume of shale 6.1% and 14.0%, total porosity is observed between 14.6% and 18.2%, effective porosity ranges 12.5-16.5%, water saturation exhibits between 14.05% and 31.58%, hydrocarbon saturation ranges 68.42% -86.9%, The lithology of lower goru formation is dominated by very fine to fine and silty sandstone. The study method can be use within the vicinity of central Indus basin and similar basin elsewhere in the globe to quantify petro physical properties of oil and gas wells and comprehend the reservoir potential.

Identification of Hydrocarbon Potential of Talhar Shale: Member of Lower Goru Formation Using Well Logs Derived Parameters, Southern Lower Indus Basin, Pakistan

2017 ◽  
Vol 29 (3) ◽  
pp. 587-593 ◽  
Author(s):  
Muhsan Ehsan ◽  
Hanming Gu ◽  
Malik Muhammad Akhtar ◽  
Saiq Shakeel Abbasi ◽  
Zaheen Ullah
Keyword(s):  
Well Logs ◽  
Indus Basin ◽  
Hydrocarbon Potential ◽  
Lower Indus Basin ◽  
Lower Goru Formation

scholarly journals Smectite illitization of the Talhar shale, Lower Goru Formation, Southern Indus Basin, Pakistan

2021 ◽  
Vol 11 (6) ◽  
pp. 2315-2325
Author(s):  
Asghar Ali ◽  
Muhammad Salman ◽  
Rafique Ahmad
Keyword(s):  
Shale Gas ◽  
Indus Basin ◽  
Elemental Content ◽  
Depth Range ◽  
Fine Grained ◽  
Depth Data ◽  
Lower Indus Basin ◽  
Quantitative Analyses ◽  
Lower Goru Formation ◽  
Depth Ranges

AbstractSubsurface samples of the Talhar shale, Lower Goru Formation, are analyzed for smectite (montmorillonite) and illite in the Nur-dep#1 (ND‒1), well 2, Southern Lower Indus Basin, Pakistan. The ND‒1, well 2 is an unsuccessful well drilled by the OGDCL, Pakistan, for the shale gas exploration. Illitization and elemental content constrained using XRD qualitative and XRF quantitative analyses, respectively. The illite content increases from 15 to 55% with increasing depth. The fine-grained shale comprises chlorite, kaolinite, halloysite, allophane, muscovite, microcline, illite and montmorillonite. Chlorite was observed at 3450–3452 m, whereas kaolinite is present at depth range of 3450–3482 m. The mix layer expandability decreases from 40 to 20% at depth ranges from 3450 to 3552 m, respectively. The interstratification is random to ordered. Potassium and silicon contents with respect to aluminum and calcium are increasing with depth. Data obtained in this research indicate that the shale gas is immature and the oil is an early–medium stage of maturation.

scholarly journals Porosity Distribution and Differentiation of Different Types of Fluids in Reservoir of Sawan Gas Field, Lower Indus Basin, Pakistan

2019 ◽  
Vol 3 (1) ◽  
pp. 28-37
Author(s):  
M. Asad ◽  
H.U. Rahim
Keyword(s):  
Acoustic Impedance ◽  
Reservoir Characterization ◽  
Three Dimensional ◽  
Seismic Inversion ◽  
Indus Basin ◽  
Gas Field ◽  
Porosity Distribution ◽  
Lower Indus Basin ◽  
Seismic Reservoir ◽  
Lower Goru Formation

AbstractThe lower Indus basin is one of the prolific basins in Pakistan in which the C-interval of lower Goru formation act as a reservoir. With the help of petrophysical interpretation production zone is recognized and also porosity is calculated at the reservoir level. Through porosity we are able to calculate Ksat. A model based inversion of 2D seismic inversion was performed to ascertain three dimensional dispersion of acoustic impedance in the investigation zone and we have recognized new areas where porosity distribution is maximum and site which is suitable for new well. Porosity and Acoustic impedance are typically contrarily relative to each other. Presently porosity can be anticipated in seismic reservoir characterization by utilizing acoustic impedance from seismic inversion far from well position.

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