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۱Depositional environment, microfacies and diagenesis of Surmeh Formation in Kohrang Area, High Zagros zone, SW Iran.
نویسنده(ها): ، ، ،
اطلاعات انتشار: چهاردهمین همایش بین المللی نفت، گاز و پتروشیمی، سال
تعداد صفحات: ۹
the jurassic surmeh formation of the zagros basin is a thick sequence of shallow water carbonate (limestones , dolomites, and dolomitic limestones . The study area is located in kohrang region kohkiloyeh province in the southwest of iran. This successtion can be subdivided in to 12 microfacies distinguished on the basis of their depositional textures and fauna. based on the paleoecology , sedimentary structures and lithology , four distinct depositional settings can be recognized ; tidal flat , lagoon , shoal and open marine. an absence of turbidite deposits , reefal facies, gradual facies changes and widespread tidal flatdeposits indicate that the surmeh formaiton was deposited in a carbonate ramp environment. there are some diagenetic processes in this formaion such as mechanical and chemical compaction, cementation, silicification, micritization, dolomitization, bioturbation , dissolution and neomorphism.<\div>

۲Detection of Boundary Layers Using Wavelet Transform
نویسنده(ها): ، ، ،
اطلاعات انتشار: چهاردهمین همایش بین المللی نفت، گاز و پتروشیمی، سال
تعداد صفحات: ۹
this study presents a novel method in detection and identificatio of geological layers and sun layers using a combination of wavelet transform and conventional well log data . Well log data of one of the oil wells in south west of iran were analyzed and its geological formation interfaces were determined using conventional packages , then we use CGR and ILD logs and a combination of wavelet transform spectrum analysis in identifying strtigraphic formation interfaces. the results from wavelet transform coefficient analysis and conventional well log analysis were similar . we conclude that a pseudo–log , detailed wavelet coefficients of raw well log data, can be used as lithology identification and boundary layer detection in combination with conventional well log data and this method can be used were due to lack of some well logs the proper identification of geological formation is not possible.<\div>

۳Geochemical (Thermal) Modeling, Burial History, Oil and Gas Generation of Petroleum System in an oil field in the South–West Iran by Using Pars Basin Modeler (PBM
نویسنده(ها): ، ،
اطلاعات انتشار: دومین کنگره مهندسی نفت ایران، سال
تعداد صفحات: ۱۰
There are three risks that must be addressed before drilling a well: trap and seal, reservoir and hydrocarbon charge. These three components must be in–place for an exploration, or production well to be successful. Assessing the trap and reservoir risk is routine task of an earth scientist in all hydrocarbon exploration companies. Seismic, well and out crop data provide abundant information that explorationists use to determine quality and viability of these two constituents. Assessing the hydrocarbon charge risk is not routine in all companies. One of the basic objectives of reservoir geochemistry is to deal with hydrocarbon charge within sedimentary basin. Thermal history and burial history reconstruction lead to an estimation of the timing of hydrocarbon generation and expulsion.In this study for thermal modeling method, time–temperature parameters were put together and then, thermal maturity of organic matter (e.g. R0) were calculated through Lopatin’s method simply referred as Time Temperature Index (TTI). Accuracy of calculations was distinguished by comparison between measured and calculated thermal indicators. In addition, the location of oil and gas generation windows and timing of hydrocarbon generation were determined in the study area.According to TTI method the mature source rocks were recognized as Kazhdumi, Gadvan and Garau formations which entered the early maturity region 12, 13 and 35 million years ago respectively and also entered the early maturity region at the depth of 3200, 3150 and 2900 m respectively.General trend of maturity in the field shows an increase suggesting that from north to the south more mature source rocks are located in the southern part of the field.<\div>
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