Modeling of porosity and permeability for hydrocarbon Exploration: A case study of Gongola arm of the Upper Benue Trough

Although subsurface traps have been regularly explored for hydrocarbon exploration, natural gas and CO2 storage has drawn industrial attention over the past few decades, thanks to the increasing demand for energy resources and the need for greenhouse gas mitigation. With only one depleted hydrocarbon field in Greece, saline aquifers, salt caverns and sedimentary basins ought to be evaluated in furtherance of the latter. Within this study the potential of the Greek subsurface for underground storage is discussed. An overview and re-evaluation of the so-far studied areas is implemented based on the available data. Lastly, a pragmatic approach for the storage potential in Greece was created, delineating gaps and risks in the already proposed sites. Based on the above details, a case study for CO2 storage is presented, which is relevant to the West Katakolo field saline aquifer.

Download Full-text

Depth to magnetic basement in the Anambra Basin, Benue Trough of Nigeria from aeromagnetic data: A prelude for hydrocarbon exploration

Interpretation ◽

10.1190/int-2021-0014.1 ◽

2021 ◽

pp. 1-57

Author(s):

Olatunbosun O. Olagundoye ◽

Chiedu S. Okereke ◽

Aniekan E. Edet ◽

Dominic Obi ◽

Aniediobong Ukpong

Keyword(s):

Depth Estimation ◽

Data Transformation ◽

Hydrocarbon Exploration ◽

Hydrocarbon Generation ◽

Depth Range ◽

Aeromagnetic Data ◽

Benue Trough ◽

Anambra Basin ◽

Magnetic Basement ◽

Fault Structures

Data transformation, regional-residual separation, trend analysis, and Analytic Signal (AS) depth estimation were applied to aeromagnetic data covering the Anambra Basin, which is a major depocentre in the Benue Trough, southeast Nigeria with the primary objectives of accentuating attributes of magnetic sources and determining if sufficient sediment thickness exists for hydrocarbon generation, maturation, and expulsion. The application of data transformation techniques (such as map projection, merging, and reduction-to-pole) and regional-residual ensured the computation of a crustal magnetic field that would be suitable for magnetic analyses. Results indicate that the magnetic basement in the basin forms an undulating surface overlain by sediments with average thickness ranging between 4 km and 7.5 km, while maximum thickness reaches 8 km in some areas. This depth range suggests promising prospect for source-facies maturation and expulsion. We expect that areas in the study area with these appreciable sediment thicknesses, good preservation of graben-fill, and suitable areal closures or fault structures would be favorable for hydrocarbon prospectivity.

Download Full-text

A new approach for porosity and permeability prediction from well logs using artificial neural network and curve fitting techniques: A case study of Niger Delta, Nigeria

Journal of Applied Geophysics ◽

10.1016/j.jappgeo.2020.104207 ◽

2020 ◽

Vol 183 ◽

pp. 104207

Author(s):

Job G. Urang ◽

Ebong D. Ebong ◽

Anthony E. Akpan ◽

Emmanuel I. Akaerue

Keyword(s):

Neural Network ◽

Artificial Neural Network ◽

Curve Fitting ◽

Niger Delta ◽

Well Logs ◽

New Approach ◽

Permeability Prediction ◽

Porosity And Permeability ◽

Artificial Neural

Download Full-text

The relationship between synsedimentary fault activity and reservoir quality — A case study of the Ek1 formation in the Wang Guantun area, China

Interpretation ◽

10.1190/int-2019-0131.1 ◽

2020 ◽

Vol 8 (3) ◽

pp. SM15-SM24 ◽

Cited By ~ 3

Author(s):

Xixin Wang ◽

Yuming Liu ◽

Jiagen Hou ◽

Shaohua Li ◽

Qiangqiang Kang ◽

...

Keyword(s):

Grain Size ◽

Slip Rate ◽

Size Analysis ◽

Reservoir Quality ◽

Accommodation Space ◽

Controlling Mechanism ◽

Porosity And Permeability ◽

Fault Interpretation ◽

The Relationship

The activity of synsedimentary faults plays an important role in controlling the distribution of sand bodies in basins and furthermore the porosity and permeability of reservoirs. We have used fault interpretation, the method of image and granularity size analysis, and the seismic pumping effect to investigate the control of the activity of the Kongdong fault on the development degree of the dissolution pores and grain size, further studying the controlling mechanism of the activity of synsedimentary faults on reservoir quality (porosity and permeability). The results showed that the slip rate of synsedimentary faults is one of the main factors in controlling reservoir quality. The slip rate controls the accommodation space and hydrodynamic conditions and it furthermore controls the grain size. The higher the slip rate, the bigger the grain size in the downthrow wall of synsedimentary faults; the seismic pump produced by synsedimentary faults activity also controls the development degree of dissolution pores. The development degree of dissolution pores in the downthrown wall of synsedimentary faults is greater than that in the upthrown wall. Dissolution pores are more developed in areas with a large slip rate of synsedimentary faults. Porosity increases gradually with the increase of plane porosity of dissolution pores, whereas the changes of permeability are not obvious.

Download Full-text

Hydrocarbon Detection Techniques on Subtle Reservoir Exploration in Qiongdongnan Basin

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.356-360.3028 ◽

2011 ◽

Vol 356-360 ◽

pp. 3028-3032

Author(s):

Jun Xiao ◽

Bei Zhu ◽

Ji Hua Liao

Keyword(s):

Seismic Attenuation ◽

Qiongdongnan Basin ◽

Hydrocarbon Exploration ◽

Main Research ◽

Hydrocarbon Detection ◽

Detection Techniques ◽

Sand Body ◽

Information Fusion Technique ◽

Gas Bearing

Subtle reservoir is an important area of hydrocarbon exploration in Qiongdongnan basin. The reservoir hydrocarbon-bearing potential is one of the cores of this research, and the geophysical technology is the main research tool. In this paper, AVO, AVD, DR and seismic attenuation gradient techniques are carried out to evaluate the hydrocarbon-bearing ability. Taking the JY area of eastern Qiongdongnan basin as a case study, the results show that the characteristics of gas-bearing reservoir in JY area are the 3rd AVO anomaly, high AVD and DR, and low attenuation gradient. Furthermore, multi-information fusion technique is used to qualify the gas resource scale and provide decision-making advice for the future exploration. It shows that the seismic anomaly sand body of the first member of Sanya Formation in JY area has large gas resource potential and good exploration prospect.

Download Full-text

Prediction of free flowing porosity and permeability based on conventional well logging data using artificial neural networks optimized by Imperialist competitive algorithm – A case study in the South Pars gas field

Journal of Natural Gas Science and Engineering ◽

10.1016/j.jngse.2015.02.026 ◽

2015 ◽

Vol 24 ◽

pp. 89-98 ◽

Cited By ~ 18

Author(s):

Majid Jamshidian ◽

Mohsen Hadian ◽

Mostafa Mansouri Zadeh ◽

Zohreh Kazempoor ◽

Pouya Bazargan ◽

...

Keyword(s):

Neural Networks ◽

Artificial Neural Networks ◽

Imperialist Competitive Algorithm ◽

Well Logging ◽

The South ◽

Gas Field ◽

Competitive Algorithm ◽

Porosity And Permeability ◽

Artificial Neural

Download Full-text

Characteristics and prediction of weathered volcanic rock reservoirs: A case study of Carboniferous rocks in Zhongguai paleouplift of Junggar Basin, China

Interpretation ◽

10.1190/int-2017-0159.1 ◽

2018 ◽

Vol 6 (2) ◽

pp. T431-T447 ◽

Cited By ~ 2

Author(s):

Xiaoming Sun ◽

Siyuan Cao ◽

Xiao Pan ◽

Xiangyang Hou ◽

Hui Gao ◽

...

Keyword(s):

Oil And Gas ◽

Volcanic Rocks ◽

Geophysical Methods ◽

Junggar Basin ◽

Hydrocarbon Exploration ◽

Background Information ◽

Long Time ◽

Volcanic Reservoirs ◽

Fluid Detection

Volcanic reservoirs have been overlooked for hydrocarbon exploration for a long time. Carboniferous volcanic rocks of the Zhongguai paleouplift contain proven reserves of [Formula: see text]. We have investigated the volcanic reservoirs integrating cores, well, and seismic data, and the proposed volcanic reservoir distribution is controlled by the weathering function, fractures, and lithology. The weathering process makes the originally tight igneous rocks become good-quality reservoirs, and fractures play an important role in connecting different types of pores and act as reservoir space. Isolated and ineffective pores become effective ones due to connection among fractures. Only volcanic breccia can be good-quality reservoirs without any weathering function. The nonlinear chaos inversion controlled by weathered layers shows that the good-quality reservoirs are distributed in the top of the weathering crust and the structural high. Furthermore, fluid-detection attributes and background information prove that oil and gas are distributed along the paleostructural high. The objectives of this study were to (1) describe the characteristics of volcanic reservoirs and determine the controlled rules for reservoir distribution, (2) characterize the distribution of reservoirs and hydrocarbon, and (3) propose an effective workflow for hydrocarbon exploration in volcanic rocks combining geologic and geophysical methods.

Download Full-text