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    • List of Articles Source rock

      • Open Access Article

        1 - Geochemical Investigation and Mineral Matrix Effect on Probable Source Rock's Potentiality, Darquain Oilfield in the Abadan Plain
        بهرام علیزاده نسیم آزاد بخت سید حسین  حسینی الهام ترهنده
        Darquain anticline is located at 5 km northeast of city of Abadan. The axis trend of this oilfield is north through south. In this study, Kazhdumi, Gadvan, Garu and Sargelu Formations in Darquain Oilfield, in Abadan Plain, were analyzed by Rock-Eval 6 instrument. S2 v More
        Darquain anticline is located at 5 km northeast of city of Abadan. The axis trend of this oilfield is north through south. In this study, Kazhdumi, Gadvan, Garu and Sargelu Formations in Darquain Oilfield, in Abadan Plain, were analyzed by Rock-Eval 6 instrument. S2 vs. TOC plot revealed that kerogen type in this oilfield predominantly is of mixed of types II & III. Significant S2 Adsorption by matrix of Kazhdumi Formation in well numbers 1 and 2 (5.33-14.06 mg HC/gr rock) and Gadvan Formation in well numbers 2 and 3 (3.1-3.2 mg HC/gr rock) is due to low thermal maturity as well as low Gas-Oil Ratio factor. In Garu and Sargelu Formations amounts of adsorbed S2 by matrix are respectedly 0.82 and 0.84 mg HC/gr rock, that represent a medium thermal maturation and medium to high Gas-Oil Ratio factor. Quantity of TOClive in the Kazhdumi, Gadvan, Garu and Sargelu formations estimated to be in the range of 0.6-1.6, 0.2-1.9, 1.53 and 8.38 by weight percent respectively. This represents potential for the studied formations fair to excellent petroleum generation. Also the studied wells were modeled, by which the Ro of the source rocks were calculated according to their depth. Also transformation ratio of organic matter and the initial TOC is estimated. Transformation Ratio of Kerogen in studied formations ranges from 0.12 to 0.66. This is in accordance with estimated Easy Ro by PBM software (0.5-0.8). It can then be concluded that Kazhdumi Formation is in early oil window and already started to generate hydrocarbon. This is also verified by Tmax data. The Gas-Oil Ratio of Kazhdumi and Gadvan Formations is 0-1 indicating variable hydrocarbon generation. Also this factor for Garu and Sargelu is 0.58-1 indicates that they have more gas generation potential rather than oil generation potential. The inferences drawn from It can be inferenced from iso TOCoil and TOCgas maps led to the conclution that, in west and southwestern parts of the basin, the depth during deposition of mentioned formations was more in compare to other parts of Darquain. Manuscript profile
      • Open Access Article

        2 - Evaluation of hydrocarbon potential of Gadvan Formation in Binak, Gachsaran and Marun fileds by geochemical methods and thermal modeling.
        نغمه مرتاضیان
        Investigation on hydrocarbon source rock potentiality of Gadvan Formation in Marun, Gachsaran and Binak oil fields using Rock-eval pyrolysis shows that Gadvan Formation in Marun and Gachsaran oil fields is an effective source rock and is capable of generating hydrocar More
        Investigation on hydrocarbon source rock potentiality of Gadvan Formation in Marun, Gachsaran and Binak oil fields using Rock-eval pyrolysis shows that Gadvan Formation in Marun and Gachsaran oil fields is an effective source rock and is capable of generating hydrocarbon (oil and gas) , whereas the same formation in the Binak oil field has no hydrocarbon generation potential. The presence of organic matter in Gadvan Formation from Marun and Gachsaran oil fields suggests a mixture of kerogen type II/III and in Binak oil field kergen type III is dominant. Based on Tmax values derived from Rock-Eval pyrolysis, Gadvan Formation in Marun and Gachsaran oil fields is thermally mature and entered oil window stage but in Binak oil field this formation is immature and has not entered oil window yet. The results obtained from pyrolysis and virtinite reflectance measurements are in good agreement with thermal history modeling using PBM software program. Organic facies curve plotted for the Gadvan Formation indicates organic facies BC for Marun and Gachsaran oil fields and organic facies CD for Binak oil field suggesting marine persistent anoxic to oxidizing conditions prevailed during early deposition Manuscript profile
      • Open Access Article

        3 - Evaluation of hydrocarbon potential of Gadvan Formation in Binak, Gachsaran and Marun fileds by geochemical methods and thermal modeling
        نغمه مرتاضیان
        Investigation on hydrocarbon source rock potentiality of Gadvan Formation in Marun, Gachsaran and Binak oil fields using Rock-eval pyrolysis shows that Gadvan Formation in Marun and Gachsaran oil fields is an effective source rock and is capable of generating hydrocarbo More
        Investigation on hydrocarbon source rock potentiality of Gadvan Formation in Marun, Gachsaran and Binak oil fields using Rock-eval pyrolysis shows that Gadvan Formation in Marun and Gachsaran oil fields is an effective source rock and is capable of generating hydrocarbon (oil and gas) , whereas the same formation in the Binak oil field has no hydrocarbon generation potential. The presence of organic matter in Gadvan Formation from Marun and Gachsaran oil fields suggests a mixture of kerogen type II/III and in Binak oil field kergen type III is dominant. Based on Tmax values derived from Rock-Eval pyrolysis, Gadvan Formation in Marun and Gachsaran oil fields is thermally mature and entered oil window stage but in Binak oil field this formation is immature and has not entered oil window yet. The results obtained from pyrolysis and virtinite reflectance measurements are in good agreement with thermal history modeling using PBM software program. Organic facies curve plotted for the Gadvan Formation indicates organic facies BC for Marun and Gachsaran oil fields and organic facies CD for Binak oil field suggesting marine persistent anoxic to oxidizing conditions prevailed Manuscript profile
      • Open Access Article

        4 - Source rock characterization of the Fahlian, Gadvan, and Surmeh formations in giant Gachsaran oilfield
        Majid Safaei-Farouji Hossain Rahimpour-Bonab Buyuk Ghorbani
        The aim of this study is geochemical evaluation of the Fahlian, Gadvan, and Surmeh formations as possible source rocks in Gachsaran oil field using Rock-Eval Pyrolysis manner. All of the studied samples possess migration index amounts lower than 1.5 showing indigenous n More
        The aim of this study is geochemical evaluation of the Fahlian, Gadvan, and Surmeh formations as possible source rocks in Gachsaran oil field using Rock-Eval Pyrolysis manner. All of the studied samples possess migration index amounts lower than 1.5 showing indigenous nature of their hydrocarbons. TOC versus S2 and TOC against S1+S2 diagrams suggest fair hydrocarbon generation potential for the Fahlian and Surmeh formations and fair to good potential for the Gadvan formation. for the Fahlian and Surmeh formations type III kerogen and for the Gadvan formation mixed type II and II-III kerogens were identified. So, the Fahlian and Surmeh formations contain organic matter with terrigenous source (gas prone) and the Gadvan Formation possess both of marine and terrigenous organic matter (oil and gas prone). According to the cross plot of Tmax versus Hydrogen index (HI), the Gurpi formation is capable of mixed gas and oil, and gas generation and the Fahlian and Surmeh formations considered only gas prone formations. In terms of organic facies type, the surmeh, Fahlian, and Gurpi formations located in CD, C and CD, and BC and C zones of jones diagram, respectively. So, the Gadvan formation in compare to the Fahlian formation and the Fahlian formation in compare to the Surmeh formation, deposited under more anoxic conditions. In terms of thermal maturity, All of the Fahlian, Gadvan, and Surmeh formations located in oil window zone, but the Surmeh formation possess higher maturity than the Fahlian formation and the Fahlian formation have highr maturity in compare to the Gadvan formation. Manuscript profile
      • Open Access Article

        5 - Estimation of oil production, restoration of burial history and thermal maturity using Pyrolysis Rock-Eval data and Arrhenius model in one of the wells of Parsi oilfield
        Abuzar Bazvandi Bijan Maleki Saeedeh Senemari parviz armani
        Investigating potential source rocks in oilfields is important. In this study, in addition to evaluating the hydrocarbon potential, the Arrhenius kinetic model was used to more accurately assess the source rock maturity status as well as the percentage of oil generation More
        Investigating potential source rocks in oilfields is important. In this study, in addition to evaluating the hydrocarbon potential, the Arrhenius kinetic model was used to more accurately assess the source rock maturity status as well as the percentage of oil generation in the Parsi oilfield. In the Arrhenius model, the rate of kerogen decomposition is very important. In this research, some source rocks that have been tested by thermal pyrolysis were kinetically analyzed and the source rock conversion ratio (TR) was determined. Based on the results of burial history and thermal modeling, it was found that Kazhdumi and Pabdeh formations were in the oil window well while Gurpi formation did not enter the oil window due to poor organic matter content (TR = 0). Therefore, among the Kazhdomi, Gurpi and Pabdeh formations in the Parsi oilfield, Kazhdumi formation is considered as the main and most effective source rock of this oilfield with high TTI and TR = 100. Manuscript profile
      • Open Access Article

        6 - Comparison of ΔlogR and mineralogy-based methods in estimating organic carbon content of Pabdeh formation in Ahwaz and Rag-e Sefid oilfields
        Mahdi Shafie Seyed Hassan Tabatabaei Morteza Tabaei Nader Fathianpour Ali Opera
        One of the most common and relatively accurate methods for determining the amount of organic carbon in rocks in the oil and gas exploration potential is the Pyrolysis family, a standard example of which is the first rock pyrolysis method. Based on the study of the core, More
        One of the most common and relatively accurate methods for determining the amount of organic carbon in rocks in the oil and gas exploration potential is the Pyrolysis family, a standard example of which is the first rock pyrolysis method. Based on the study of the core, this method explores the potential of oil and gas resources in rocks. One of the important and valuable parameters in determining the potential of oil and gas resources is the determination of TOC. The purpose and motivation of this research is to compare the ΔlogR method and the mineralogy-based method for calculating the total amount of organic carbon in the source rock. It has the desired accuracy and relatively low cost. The fields studied in this study are two fields of Ahwaz and Rag-e sefid. These fields are among the potential fields of southwestern Iran for more detailed investigation and estimation of organic carbon content. In this research, software studies have been performed through IP software, using which the petrophysical data of each field have been calculated and compared, and finally, its results have been compared with actual TOC values. Input data in the mineralogical data method include density log, neutron porosity log and gamma log, and input data in the ΔlogR method include acoustic and resistivity logs. According to the fields, the most appropriate methods (in terms of R2) in Ahwaz and rag-e sefid fields are the mineralogical data method and the ΔlogR method, respectively. Also, in terms of cost, precision and accuracy parameters, the best method discussed in this research is R2 mineralogical data in Ahwaz and Rag-e sefid, 0.94 and 0.61, respectively. After this, the ΔlogR method comes second. Manuscript profile