A comprehensive investigation on performance of oil and gas development in Nigeria: Technical and non-technical analyses

Rui, Zhenhua; Cui, Kehang; Wang, Xiaoqing; Chun, Jung-Hoon; Li, Yuwei; Zhang, Zhien; Lu, Jun; Chen, Gang; Zhou, Xiyu; Patil, Shirish

doi:10.1016/j.energy.2018.06.027

Cited by 84 publications

(18 citation statements)

References 45 publications

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“…In many instances, the scope of the facilities making up the project were exceeded. The result supports the findings of Rui, et al [31] that oil and gas projects in Nigeria experience 42% scope overrun and a 38% cost overrun. In this case study, the major facilities in the projects collectively exceeded their original cost by 106%.…”

Section: Resultssupporting

confidence: 90%

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Cost Over-Run in Civil Works: A Case-Study of Engineering, Procurement and Construction (EPC) Gas Depot Construction Projects in Nigeria

Ogbu

Ehigiator-Irughe

2020

EJGEO

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Engineering, procurement and Construction (EPC) projects in the oil and gas sector of Nigeria are under-researched. This leaves investors with little or no guide on the cost-overrun risks of oil and gas depot projects. Using the qualitative case study research technique, this study investigated cost overrun in the civil works of a petroleum products depot project in Lagos, Nigeria. The objectives were to ascertain the reasons for cost overrun and the areas of substantial cost overrun in the project. It was found that except for the cost of construction of “gantry” which was under-measured as a result of use of a wrong method of costing, the rest of the major facilities experienced cost overrun with a cumulative difference of 106%. It was also discovered that the cost overruns mainly originated from design and construction activities. The study recommends the timely engagement of consultants to review the conceptual designs of contractors and monitor the activities of EPC contractors for oil and gas depot projects on behalf of clients. Such consultants should not, however, have powers to control the contractors. As much as possible, parties to EPC contracts should use standard conditions of contract that will better reflect their intentions rather than contrive bespoke conditions.

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Section: Resultssupporting

confidence: 90%

“…In this case study, the major facilities in the projects collectively exceeded their original cost by 106%. Rui, et al [31] noted that the range of cost overrun in Nigerian projects is -12% to 130%, which implies that the cost variation in the major components of this project tends towards the higher range of cost overrun for the country.…”

Section: Resultsmentioning

confidence: 98%

Cost Over-Run in Civil Works: A Case-Study of Engineering, Procurement and Construction (EPC) Gas Depot Construction Projects in Nigeria

Ogbu

Ehigiator-Irughe

2020

EJGEO

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“…Management in the oil and gas industry is the prevalence of economic and political stability [10]. In a related case, it was revealed that the general low subsurface complexity of the Nigerian oil and gas projects which calls for low technology challenges are advantages for field development; therefore, subsurface complexity and technology challenges are not the major causes of the poor performance, including those related to the adverse impacts of the oil and gas industry [15]. Another argument citing the cost of production of oil and gas and associated risks include the inherent risks of catastrophic oil wells blowouts at extreme depths which tend to increase as the productivity of oil facilities increases exponentially with water depth, as evident in the "Golden Triangle" between West Africa, Brazil and Gulf of Mexico [16].…”

Section: Some Literature Argues That the Magic To Influence Sustainabmentioning

confidence: 99%

Mitigating the Environmental Effects of Oil and Gas Exploitation: Issues of Compliance, Cost of Production, and Community Awareness

Arthur¹

2020

JPEE

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This study assessed the effectiveness of mitigation measures adopted to address the environmental effects of oil and gas industries from the perspective of compliance, cost of production, and community awareness. The research applied a case study through multi-method-qualitative and quantitative approaches. The target population of 547,368 people involved people in Takoradi, Shama and Newtown communities. A sample size of 150 was selected and categorised under 36% for Shama, 30% for Newtown and 34% for Takoradi. A combination of probability (simple random) and non-probability (cluster and convenience) sampling frames were used to access the respondents for the study. Data collection tools were limited to questionnaires and interview sessions. The descriptive statistics, Relative Importance Index (RII) and significance testing using a one-sample t-test module guided the analysis. Interview sessions were compiled into transcripts and later categorized into themes that directly reflected the patterns of the questions on the questionnaire. The conclusion rated major decisions in mitigating oil and gas impacts on the environment as first for conscious effort to package fuel and other chemicals in safe storages, followed by the use of best road systems to reduce the risk of accidents, then application of strict rules and regulations to curb impacts and lastly capacity building for participants in the oil and gas production industry. While significant measures have been adopted to mitigate the effects of oil and gas exploration, there remain challenges with effectiveness as a result of weakness in community involvement efforts, lack of motivation, weak laws and regulations and loss of respect. For effectiveness in reducing the challenges to mitigate the environmental impacts of the oil and gas production activity, policymakers, as well as the practitioners in the oil production industry, are advised to motivate people into buying into their policy to reduce such impacts.

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“…Tight sand initial permeability which is usually less than 1 mD [19][20][21][22] has been widely researched [23,24], especially the permeability stress sensitivity [25][26][27][28]. Different methods have been used to measure tight sand permeability, mainly including traditional steady-flow permeability measurement and pulse-decay permeability measurement [29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Analyzing Tight Sand Characteristics and Its Influence on Aqueous Phase Removal by Gas Displacement

Meng

Shen

et al. 2019

Geofluids

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Tight sand gas is an important unconventional natural gas. Liquid filtration plays a main role in the formation damage. Flowback rate is closely related to the formation permeability recovery. Usually, the more flowback rate is, the better the permeability recovery is. In order to research the factors that influence the liquid flowback, the tight sand characteristics and gas displacement have been investigated. Some experiments were carried out, including porosity, permeability, XRD, casting thin section, SEM, stress sensitivity, rock expansion, and gas displacement. The results are shown as follows. Taiyuan formation has average high clay content than H8 formation. Illite is the main clay in Taiyuan formation; chlorite is the main clay in H8 formation. From the casting thin section, the rock has strong compression. Taiyuan formation has large pore. However, H8 formation mainly has small cracks. Through the SEM, there are many micro- to nanocracks as well as some pores in these two formations. In some cases, cracks penetrate the clays. From the permeability stress sensitivity, these tight sands have strong stress sensitivity. Permeability decreases quickly with increasing confining pressure. In the rock expansion experiment, the tight sand has less expansion rate compared with shale gas rock and volcanic gas rock. Rock expansion rate has positive relationship with clay content. In the gas displacement experiment, usually the higher the clay content, the lesser the liquid flowback. Some samples have high clay content. However, it has high flowback rate, which may account for good pore connection. Through the above study, the flowback rate has negative relationship with clay content and positive relationship with pore size, pore connection, and displacement pressure. In order to increase tight gas production in the study area, the formation should have high flowback rate and less liquid retention. Therefore, clay expansion preventing additives should be added into the fracturing liquid to reduce the liquid retention. The quick flowback should be implemented after hydraulic fracturing for reducing the interaction between liquid and rock. At the same time, the drawdown pressure should keep in a certain value to reduce stress sensitivity.

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A comprehensive investigation on performance of oil and gas development in Nigeria: Technical and non-technical analyses

Cited by 84 publications

References 45 publications

Cost Over-Run in Civil Works: A Case-Study of Engineering, Procurement and Construction (EPC) Gas Depot Construction Projects in Nigeria

Cost Over-Run in Civil Works: A Case-Study of Engineering, Procurement and Construction (EPC) Gas Depot Construction Projects in Nigeria

Mitigating the Environmental Effects of Oil and Gas Exploitation: Issues of Compliance, Cost of Production, and Community Awareness

Analyzing Tight Sand Characteristics and Its Influence on Aqueous Phase Removal by Gas Displacement

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