Sensitivity Study On Geomechanical Properties To Determine Their Impact On Fracture Dimensions And Gas Production In The Khuff And Pre-Khuff Formations Using A Layered Reservoir System Approach, Ghawar Reservoir, Saudi Arabia

2001 ◽  
Author(s):  
Rahim Zillur ◽  
Mohammed Y. Al-Qahtani
Keyword(s):  
Saudi Arabia ◽  
System Approach ◽  
Sensitivity Study ◽  
Gas Production ◽  
Geomechanical Properties ◽  
Reservoir System

The Effect of Cementation on the Mechanical Properties of Sandstones

2006 ◽  
Vol 9 (04) ◽  
pp. 308-316 ◽  
Author(s):  
Ashraf M. Al-Tahini ◽  
Carl H. Sondergeld ◽  
Chandra S. Rai
Keyword(s):  
Mechanical Properties ◽  
Saudi Arabia ◽  
Hydraulic Fracture ◽  
Gas Production ◽  
Wellbore Stability ◽  
Minor Role ◽  
Complex Nature ◽  
Thin Sections ◽  
Geomechanical Properties ◽  
A Minor

Summary The variability in mechanical properties measured on sands from the Jauf and Unayzah formations of Saudi Arabia is observed to be dependent upon cementation. Understanding the role of cementation in controlling the mechanical properties can improve the design of hydraulic-fracture treatments and, hence, improve reservoir performance. Strength measurements from triaxial-testing data and examination of core in thin sections were used to relate the detailed microstructure and cementation to the variation of mechanical properties. Strength and elastic moduli were determined for 65 samples cored from five different wells. Forty-seven samples were analyzed in thin sections and point counted to determine and quantify cementation. Cements in these two formations have variable composition and habits; both affect the mechanical properties and strength. It is not sufficient to know that cements exist; it is also necessary to know where the cement occurs. Pure quartz over growths play a major role in increasing strength, while clay coatings play a minor role. Simple linear correlations were found relating cement concentrations to strength. Introduction The Jauf and Unayzah reservoirs (Ghawar field, Saudi Arabia) are deep sequences of thin sandstones and shales saturated with condensate-rich gas. These reservoir rocks display a wide variation in both permeability and porosity (Fig. 1) (Al-Qahtani and Buhidma 2001). Hydraulic fracturing has been introduced to enhance productivity in the Jauf sandstones within the Ghawar reservoir. The complex nature of tectonic stresses, geomechanical properties, and geology leads to problems of sand production and wellbore stability in the Unayzah and Jauf formations. Such problems make the development of these reservoirs challenging. The variations of mechanical properties such as Young's modulus (E), Poisson's ratio, (u), and unconfined compressive strength (UCS) have a direct impact on hydraulic-fracture design. The variation of these properties affects fracture propagation and geometry and, consequently, gas production.

scholarly journals Fluid pressure arrival-time tomography: Estimation and assessment in the presence of inequality constraints with an application to production at the Krechba field, Algeria

Geophysics ◽  
2010 ◽  
Vol 75 (6) ◽  
pp. O39-O55 ◽  
Author(s):  
Alessio Rucci ◽  
D. W. Vasco ◽  
Fabrizio Novali
Keyword(s):  
Surface Deformation ◽  
Transient Flow ◽  
Fluid Pressure ◽  
Inequality Constraints ◽  
Gas Production ◽  
Gas Field ◽  
Peak Displacement ◽  
Geomechanical Properties ◽  
Fluid Production ◽  
Using Data

Deformation in the overburden proves useful in deducing spatial and temporal changes in the volume of a producing reservoir. Based on these changes, we have estimated diffusive traveltimes associated with the transient flow due to production, and then, as the solution of a linear inverse problem, the effective permeability of the reservoir. An advantage of the approach based on traveltimes, as opposed to one based on the amplitude of surface deformation, is that it is much less sensitive to the exact geomechanical properties of the reservoir and overburden. Inequalities constrain the inversion, under the assumption that the fluid production only results in pore volume decreases within the reservoir. The formulation has been applied to satellite-based estimates of deformation in the material overlying a thin gas production zone at the Krechba field in Algeria. The peak displacement after three years of gas production is found to be approximately [Formula: see text], overlying the eastern margin of the anticlinal structure defining the gas field. Using data from 15 irregularly spaced images of range change, we have calculated the diffusive traveltimes associated with the startup of a gas production well. The inequality constraints were incorporated into the estimates of model parameter resolution and covariance, improving the resolution by roughly 30% to 40%.

An Efficient Multiscale Method for the Simulation of In-situ Conversion Processes

SPE Journal ◽  
2015 ◽  
Vol 20 (03) ◽  
pp. 579-593 ◽  
Author(s):  
Hangyu Li ◽  
Jeroen C. Vink ◽  
Faruk O. Alpak
Keyword(s):  
Numerical Modeling ◽  
Reaction Rates ◽  
Sensitivity Study ◽  
Gas Production ◽  
Multiscale Method ◽  
Fine Scale ◽  
Computational Performance ◽  
Simulation Results ◽  
Coarse Grids

Summary Numerical modeling of the in-situ conversion process (ICP) is a challenging endeavor involving thermal multiphase flow, compositional pressure/volume/temperature (PVT) behavior, and chemical reactions that convert solid kerogen into light hydrocarbons, which are tightly coupled to temperature propagation. Our investigations of grid-resolution effects on the accuracy and performance of ICP simulations have demonstrated that ICP-simulation outcomes—specifically, chemical-reaction rates, kerogen-accumulation profiles, and oil-/gas-production rates, may exhibit relatively large errors on coarse grids. Coarse grids are attractive because they deliver favorable computational performance. We have developed a novel multiscale modeling method for simulating ICP that reduces numerical-modeling errors and reproduces fine-scale-simulation results on relatively coarse grids. The method uses a two-scale solution method, in which the reaction kinetics of the solids is solved locally on a fine-scale grid, with interpolated temperatures obtained from coarse-grid simulations of thermal flow and fluid transport. We demonstrate the accuracy and efficiency of our multiscale method with representative 1D models. It is shown that the method delivers accurate solutions for key ICP performance indicators with very little computational overhead compared with corresponding coarse-scale models. The robustness of the multiscale method has been verified over a number of physical-parameter ranges with a limited-scope sensitivity study. Numerical results show that the multiscale method consistently improves the simulation results and matches the fine-scale reference results closely.

scholarly journals International Politics of the Persian Gulf

2013 ◽  
Vol 30 (4) ◽  
pp. 115-118
Author(s):  
Turan Kayaoglu
Keyword(s):  
Saudi Arabia ◽  
International Relations ◽  
Persian Gulf ◽  
Soft Power ◽  
International Politics ◽  
Resource Competition ◽  
Gas Production ◽  
Late Nineteenth Century ◽  
Gulf Region ◽  
The Persian Gulf

The Persian Gulf region is home to the six members of the Gulf Cooperation Council (viz., Oman, the UAE, Qatar, Bahrain, Kuwait, and Saudi Arabia), Iran, and Iraq. Holding over 60 percent of the world’s oil and over 40 percent of its natural gas reserves, the Persian Gulf is central to the global economy. Yet a dominant regional power is lacking; beginning with the British in the late nineteenth century, foreign powers have consistently been meddling in the region. Significant economic, social, cultural, and political changes have transformed the region’s international relations since Britain’s withdrawal in the 1960s. The contributors to this volume, which provides a rich account of this transformation, focus on natural resources, the Iranian-Saudi competition, the interest of major external actors, and political reform. The volume’s main thrust is the centrality of both state and regime security in order to understand the region. The volume’s editor, Mehran Kamrava, notes that the international politics there is essentially that of security politics. He offers four reasons for this: (1) its central role in oil and natural gas production and, increasingly, global finance, (2) the competition between Iran and Saudi Arabia over regional leadership, (3) the long-standing American-Iranian conflict, and (4) the instability brought about by intermixing politics and religion. He identifies three poles of power that shape the region’s security dynamics: the American pole; the GCC pole, which is centered on Saudi military and Qatari-UAE financial power; and the Iranian pole, which relies both on military might and soft power. Since the Iranian revolution, the American and the GCC poles have built a resilient alliance that has been driven by both the United States’ growing direct involvement and the GCC’s failure to provide security to its members. The chapters, written by leading regional specialists, further elaborate on the region’s security dynamics. In Chapter 2, J. E. Petersen offers a useful typology of boundary formation. He discusses how the state-building process, historical claims, colonial imposition, and resource competition have shaped state boundaries. As these boundaries remain contested, Petersen details various ongoing problems. In Chapter 3, Fred H. Lawson refines the concepts “security dilemma” and “alliances dilemma” and uses them to explain the arms race in the Gulf since the first Gulf War. Middle East specialists and international relations scholars will find these chapters useful in conceptual refinement ...

Gulf states will struggle to meet domestic gas demand

2018 ◽  
Keyword(s):  
Saudi Arabia ◽  
Natural Gas ◽  
United Arab Emirates ◽  
Gas Production ◽  
Medium Term ◽  
Content Type ◽  
Associated Gas ◽  
Domestic Markets ◽  
Gulf States ◽  
The Cost

Significance Saudi Arabia, Kuwait and the United Arab Emirates (UAE) are pursuing ambitious natural gas plans that depend on relatively high-cost non-associated gas developments. Impacts The cost of gas in Saudi Arabia, Kuwait and the UAE will rise, creating further pressure to reform domestic markets. Hoped-for LNG export opportunities are unlikely to be realised in the short-to-medium term. Initial phases of assessment will determine whether the targeted prospects are genuinely commercial. Gas production will be intimately linked with refinery and petrochemical expansion plans.

scholarly journals Oil, gas industry of Saudi Arabia

2020 ◽  
Vol 63 (9) ◽  
pp. 105-112
Author(s):  
Sh aalan Mohamed Abdo Hamud ◽  
◽  
Raisa A. Ak hmedyanova ◽  
Keyword(s):  
Saudi Arabia ◽  
Natural Gas ◽  
Shale Gas ◽  
Oil And Gas ◽  
Gas Production ◽  
Gas Industry ◽  
Oil Reserves ◽  
The World ◽  
Saudi Aramco ◽  
Oil Company

The review of the oil and gas industry in Saudi Arabia is Conducted. Data on oil and gas reserves, consumption, and exports are provided. Saudi Arabia is one of the largest non-FTI producers in the Russian Federation among the non-FTI exporters (OPEC). BL agodarya mirovym za pasam not FTI, one of the most important ones in the world, but the one with the most inquisitive in the field of energy from rasli, Saudi Arabia, is the largest exporter of oil. The data on oil reserves of the largest fields, including the largest in the world of the terikovoye non-oil field of Gavar are presented. Saudi Arabia occupies the fifth place in the world in the field of natural gas passes, with a volume of 294 trillion cubic feet, and the third place in the field of natural gas passes in the Far East. Saudi Arabia they EET de nine EXT morning not preparatively for waste water treatment, of which four PR andlegal Saudi Aramco and the OS the rest of the floor joint PR Adbrite with to foreign companies. The largest oil and gas companies represented in SaudiI Arawia are named, in particular: Saudi Aramco, Saudi Shell, Saudi Exxon Mobil, Saudi Chevron, Total, Eni, Sinopec, Sumitomo. It is shown that Saudi Ar amco is a non-state oil company of Saudi Arabia, the largest in the world in terms of oil production and oil reserves. The company also controls natural gas production in the country. Saudi Aramco is a national non-oil company Of the Saudi Aravia, which is responsible for non-oil and gas operations throughout the Kingdom. Recently, the main goal is to use unconventional gas sources, namely shale gas production. Currently, the company Saudi Aramco has more than 16 drilling rigs for the extraction of shale gas. By the end of 2020, the company is expected to extract 3 billion cubic feet of natural gas per day.

First level seismic microzonation map of Al-Madinah province, western Saudi Arabia using the geographic information system approach

2016 ◽  
Vol 75 (3) ◽  
Author(s):  
Sayed S. R. Moustafa ◽  
Nassir SN Al-Arifi ◽  
Muhammad Kamran Jafri ◽  
Muhammad Naeem ◽  
Eslam A. Alawadi ◽  
...  
Keyword(s):  
Information System ◽  
Saudi Arabia ◽  
Geographic Information System ◽  
System Approach ◽  
Geographic Information ◽  
Seismic Microzonation
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