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EAGE workshop on Developments in Land Seismic Acquisition for Exploration
- Conference date: 17 May 2010 - 19 May 2010
- Location: Cairo, Egypt
- Published: 18 May 2010
61 - 73 of 73 results
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Application of LPG Fracturing for Unconventional Resources
More LessHolditch (2009) suggested that the Total Recoverable Resource from unconventional gas reservoirs in any basin will be about 10 times more than the ultimate recovery of all the conventional oil and gas reservoirs in the same basin. Exploration for these huge unconventional resources has grown globally in the last several decades, especially for tight gas sands, tight oil carbonates, and gas shales.
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Shuaiba: The Challenging Unconventional Trap
Authors G. Al Sahlan, G. Gega, R. Blackford and P. ClewsSequence Stratigraphy of Shuaiba Post Deposition; Digenesis
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Reservoir development and entrapment mechanisms for the basal Zubair Formation in Kuwait
Authors S.K. Tanoli, A.A. Al-Fares and O. Al-KhalidThe paper presents the reservoir sandstone development associated with the Late Valanginian sequence boundary. Both conventional and unconventional entrapment occurs. The conventional entrapment envisages the presence of top seal and a four way closure structure. Unconventional entrapment can take place where sealing facies impinge against a paleohigh providing vertical as well as lateral seal. The play is assessed at local scale for development and regional scale for exploration purposes. For the former geophysical attributes are used to determine the reservoir distribution. For regional analysis paleodrainage pathways are determined to figure out the possible loci for sandbody development.
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Looking for Sand in the Empty Quarter: Exploring for Permian Stratigraphic Traps in the South Rub al Khali Basin
Authors G. Pike, C. Harvey, M. Hulver, P. van Mastrigt and W. VoggenreiterA number of stratigraphic traps were identified and de-risked through SRAK’s Upper Paleozoic Play Based Exploration project. The essential component was the recognition of thickening seismic geometries off-structure that were related to potential Nuayyim Formation (Unayzah ‘A’ Reservoir Unit) sandstone development and/or Jawb Member (Unayzah ‘B’ Reservoir Unit) onlap.
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Tight Gas and Oil Reservoirs in Kuwait - An Overview
Authors N. Mohammed Al-Ammar, R. Husain, B.Z. Khan, F. Hussain, A. Prakash and R. MulyonoTight reservoirs of Kuwait of different ages have been discussed.Four major tight reservoirs are Triassic Lower Jilh, Jurassic Najmah-Sargelu and Cretaceous Makhul and Minagish reservoirs. These reservoirs are prospective in areas of natural fracture development. Major challenges and way forward for exploration of these targets have been elaborated.
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Jilh Formation: Sedimentology and Diagenetic modifications with reference to Reservoir characteriztion, Kuwait
Authors M.M. Al-Ajmi, D.A. Khan and R. HusainThe Jilh Formation in Kuwait is an unconventional reservoir with various Facies Associations suggesting the deposition in restricted environment with supratidal and intertidal to sub-tidal depositional conditions with occasional development of shoals. Diagenetic modifications are important as they have played an important role in modification of reservoir quality. Fractures helped in enhancing the reservoir quality and have played a major role in the prospectivity of Jilh Formation
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Integrated Formation Evaluation Of Triassic Jilh Dolomite Reservoir, acase study from Sabriyah Field North Kuwait
Authors M.A Musaed, A.R. Ahmad, R.H. Riyasat and A.A. AbdulazizWith overstraining of conventional reservoir,the exploratory efforts are focused on unconventional reservoirs in frontier areas.The Jilh Dolomite,a tight reservoir occurring in the middle part of Late to Middle Triassic Jilh Formation,is investigated in Sabiriyah area of North Kuwait for its hydrocarbon prospectivity.The Jilh Dolomite had shown hydrocarbon potential on logs but the testing results did not match the conventional log interpretation.This has adversely impacted the hydrocarbon assessment of this reservoir,thus affecting reserve accretion targets.The re-evaluation of hydrocarbon potentials of Jilh Dolomite has been carried out utilizing all the relevant data particularly well logs,well testing,mudlog reports,drilling reports and core reports.The objectives of the petrophysical interpretation is fresh evaluation of intervals with anomalous testing results to confirm the presence of potential hydrocarbon bearing intervals in the non-conventional reservoir Jilh Dolomite.A clear cut workflow involving synergistic interpretation of different datasets has been evolved and lithological and flow properties and saturation models have been prepared.The petrophysical evaluation results show that there are possibilities of having hydrocarbons in the top part of the reservoir in North Kuwait.
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Preliminary Biofacies Studies of the Ratawi, Minagish and Makhul Formations Kuwait: The Search for the Subtle Trap
Authors S Crittenden and M. Al-BaghliThe Berriasian to Hauterivian stages of the Lower Cretaceous succession in the State of Kuwait are dominated by relatively shallow marine carbonates of the Makhul, Minagish and Ratawi formations. Exploration for hydrocarbons in Kuwait has during the last 75 years concentrated on the search for structural traps. It has only been in the last 10 to 15 years that effort has been given to the search for the more subtle stratigraphical plays and traps. The pursuit of the stratigraphical trap in the Lower Cretaceous Makhul (Tithonian in part), Minagish and Ratawi formations of Kuwait relies therefore upon the interpretation and thorough understanding of the large amount of data generated from the preceding structural phase of exploration. One interpretation technique is the integration of biofacies analysis data (from core thin sections) with geological core derived data (sedimentology, lithofacies and petrology) and with wireline logs
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Sequence Stratigraphic Framework of the Late Albian-Early Cenomanian
Authors A. H. Youssef, A.P. Kadar and R. Moralesthis study discusses how the sequence stratigraphic analysis is important in defining the uncoventional stratigraphic traps.
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Potential Field Anomalies and Oil-Gas Traps
By A.A. ChernovThe materials of regional gravity and magnetic researches are used a reliable basis for definition of the structural plan of territories, revealing of buried rises, basic tectonic blocks and basic disjunctives, that was confirmed for the first stages of study of the West-Siberian plate oil and gas bearing. As is known, in many cases the direct connection of deposits HC with abnormal gravitational (and or magnetic) field is found out. There is a plenty of such data on various regions: western Siberia, Byelorussia, Ustiurt, PreKaspiy, Canada etc. [1]. For water areas of Ob and Taz bays the most precise conformity extremuma of geopotential fields to the overwhelming majority productive anticlinal structures is observed.
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Buried Reefs Investigation by Gravity Data
By A.A. ChernovThe analysis of gravity anomalies (scale 1:25 000) in researched site was carried out with the purpose of revealing and mapping of oil and gas perspective objects in a difference sedimentations. As is known, buried reefs are shown in gravitational fields by local anomalies of four types: 1) local maxima; 2) anomalies such as "sombrero"; 3) negative anomalies with an appreciable maximum in middle; 4) negative. There are anomalies such as "a gravitational step" less often.
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Seismic Data Conditioning and Combination Attribute for Fault / Fracture Detection
Authors A. Prakash, R. Husain, A. Nada Mohamad and M. RinaldiUnconventional resources are those resources which require greater than industry standard technology or invesment to harness them. Tight sand gas is one such resource. The small faults and fractures play majot role in determining the reservoir quality in such cases. This paper discusses about data conditioning to retain appropriate signal band that enahnces small faults and then studying combination attributes to identify the areas of high fracture density.
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Integrated Modeling to Mitigate Risk in Frontier Exploration Offshore Brazil
Authors I.D. Bryant, A. Bender, A. Lovatini and B. Wygrala and P. XuMultipurpose 3D geological models were used for an integrated evaluation of the exploration potential of the offshore portions of the Potiguar and Ceará basins of Brazil. Multiclient, prestack depth-migrated 2D seismic data that covered the deeper parts of the basins were tied to released wells in the shallower part of the basins. The well data enabled depth conversion of the seismic data and interpretation of eight horizons. Geochemical data and the geological model were combined to build a 3D basin and petroleum systems model of the area that predicted the amount and location of yet-to-be discovered hydrocarbon accumulations.
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