Pyrolytic and provenance evaluation of organic matter from the tertiary niger delta basin, nigeria: implication on hydrocarbon generation.

The present work deals with evaluation of organic matter based on detailed Rock-Eval pyrolysis techniques studies to evaluate hydrocarbon generation potential of source rocks by collecting twenty- nine shale samples from well cuttings in the Tertiary Formations of the Niger Delta, Nigeria. The values of vitrinite reflectance (0.57–0.74%Ro) and maximum (Tmax: 420–445°C) confirmed that samples are at early maturity to matured stage enough to generate liquid and gaseous hydrocarbon. The cross-plot between hydrogen index (HI) and oxygen index (OI) atomic ratio indicates that samples were predominant in the bituminous rank and having kerogen Type III makes it suitable for hydrocarbon generation. Rock-Eval pyrolysis analysis (Types II-III and Type III kerogen) on shale samples from the Niger Delta reveals organic matter of predominantly terrestrial origin based on type III kerogen. The organic matter (OM) assemblages suggests a marine setting but dominated by terrestrial inputs likely related to fluvial processes which is function of most delta system. Based on high total organic carbon (TOC) value of 5.42wt% and Type III kerogen made the shale an excellent source rock, with gas-prone kerogen. The high OI, low total sulphur (TS) suggests terrestrially derived OM and deposition in an oxic and dysoxic shallow marine environment. In addition, HI and Tmax values describe the samples as a characteristic Type III dominant kerogen and potential to generate oil and gases while the Tmax, consistently indicate an immature to mature on the shale organic matter

PETROLEUM GEOCHEMISTRY OF KUCHALLI -1 IN THE NIGERIAN SECTOR OF THE CHAD BASIN

Kuchalli -1 well, one of the twenty-three exploratory oil wells drilled in the Nigerian sector of the Chad Basin penetrated a Cretaceous succession comprising the Bima, Gongila, Fika and Chad formations. Organic geochemical analyses were carried out to assess the source-rock potential of forty (40) selected ditch cuttings. Total Organic Carbon (TOC) content was found to vary between 0.5 – 2.0wt % (moderate to good) at a depth of 1700m and 2300m. Hydrogen Index (HI) values correlated against TOC and Tmax values indicate gas generative potential. Results of the investigation show that the Chad Basin has hydrocarbon source rock potential at the indicated interval. TOC of > 0.5wt% was recorded in both the Gongila and Fika shales. The Bima Sandstone and the Gombe Sandstone could serve as potential reservoir rocks. An integrated exploration programme is recommended for use in the Chad Basin to enable a better understanding of the petroleum systems of the basin

Performance Comparison of ANN Training Algorithms for Hysteresis Determination in LTE networks

Long-Term Evolution (LTE) network is an improved standard for mobile telecommunication system developed by the 3rd Generation Partnership Project (3GPP) requires an efficient handover framework which would reduce hysteresis and improve quality of service (QoS) of subscribers by maximizing scarce radio resources. This paper compares the performance of two ANN prediction algorithms (Levenberg- Marquadt and Bayesian regularization) based on received signal strength (RSS) and the hysteresis margin parameters for neuro-adaptive hysteresis margin reduction algorithm. The Bayesian regularization algorithm had a lower mean error when compared with the Levenberg-Marquadt (LM) prediction algorithm and as such a better option for neuroadaptive hysteresis margin reduction algorithm

Mapping and Characterization of Some Industrial Mineral Deposits in North-Central Nigeria as Raw Materials for Industrialization

Physical mapping and geochemical characterization of some industrial mineral occurrences in North-Central Nigeria have been undertaken as a basis for identifying the locations of their occurrence, the economic quantities, modes of occurrence and physico-chemical characteristics as raw materials for industrialization in the region. The North-Central region of Nigeria comprises the geopolitical states of Benue, Kogi, Kwara, Nasarawa, Niger, Plateau and the Federal Capital Territory. Physical mapping-surveys have been carried out on clay, marble and talc deposits in Niger State; barite and clay deposits in Nasarawa State and on clay, marble and feldspar deposits in Kogi State. Deposits of clay have been mapped in Niger State at Mashegu, Kutigi and Lemu, marble and clay at Kwakuti and talc at Kagara. In Nasarawa State barite deposits were mapped at Azara and Wuse and clay deposit at Shabu while in Kogi State clay deposits occur at Ahoko and Ojodu, marble at Jakura and Obajana and at Allo/Itobe and feldspar at Ajaokuta. All the mapped industrial minerals occur in economic quantities, although the exact reserves have not yet been measured

Screening and Ranking of Chad Basin for co 2 Sequestration Potential in Nigeria

ABSTRACT Sedimentary basins are suitable to different degrees for CO 2 geological sequestration as a result of various intrinsic and extrinsic characteristics. This paper preliminarily screened and ranked the Chad Basin of Nigeria sector based on Bachu (2003) ranking and screening criteria adapted which includes factors such as tectonic setting, basin size and depth, geology, hydrogeology, hydrocarbon potentials, climate, geothermal, existing resources and industry maturity. For each criterion i (i = 1…5) used for the evaluation of basin suitability, monotonically -increasing numerical function f i is assigned, which are continuous or discrete, to describe a value placed on a specific class j for that criterion. The lowest and the highest functions of this functions characterize the worst and best class in terms of suitability for that criterion, i.e. f i,1 = min (f i ), where and f i,n = max (f i ); where ( n = 3, 4 or 5).The criteria relate to either the containment security, the volume of storage capacity achievable, or considering the economic or technological feasibility. The results shows that Chad basin has R k score value of 0.53 against the f i, n = max (f i ) value equal to 1 as highest value of the function characterize the best in terms of suitability for the criterion in which this ranking are based on. Regional screening and ranking of the entire basins are recommended while detailed local site characterisation of the basin is needed to assess its overall suitability for CO 2 sequestration potentials, since countries like Cameroon, Central African Republic, Niger, Chad, and Nigeria shares the basin on regional leve

Planktonic agglutinated foraminiferal associations in the Cretacious Dukul formation of the Nigerian Upper Benue Trough

No Abstract. Global Journal of Geological Sciences Vol. 5 (1&2) 2007: pp. 55-6