• Slurry Injection

    Technical papers related to the injection of solids and slurry using hydraulic fracturing (aka, drill cuttings injection, slurry injection, slurry fractured injection, or cuttings reinjection).

    • "Feeling the Pulse of Drill Cuttings Injection Wells-A Case Study of Simulation, Monitoring, and Verification in Alaska", SPE 84156-PA, SPE Journal, Volume 12, Number 4, December 2007, pp. 458-467, 2007.

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      Abstract: In April 1998, a program for continuous deep disposal of drill cuttings and open pit materials was initiated on the North Slope of Alaska. This ongoing injection project is commonly referred to as GNI, or "Grind and Inject.?? Accumulated drilling cuttings and mud slurry are injected into a receptive Cretaceous soft sandstone in three wells: GNI-1, GNI-2, and GNI-3. Typical operations involve injecting slurry into one of the three wells continuously for a number of days and then switching injection to another well. The average injection rate is approximately 30,000 B/D. As of 30 September 2002, project injection has included 12.7×106 bbl of water, 30.9×106 bbl of slurry containing 2.0×106 tons or 2.2×106 cubic yards of excavated frozen reserve pit material and drilling solids, and 1.31×106 bbl of fluid from ongoing drilling operations.

    • "Geo-mechanics of Batch Injection in Horizontal Waste Disposal Wells, North Sea" ARMA 05-672, presented at Alaska Rocks 2005, The 40th U.S. Symposium on Rock Mechanics (USRMS), June 25 - 29, 2005, Anchorage, AK.

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      Abstract: The disposal domain concept is arguably accepted as the prevalent storage mechanism during the batch injection of drill cuttings. The disposal domain is best thought of as an elliptical realm surrounding the well. This phenomenon is well documented by field and laboratory observations and has been addressed in previous work. Most studies and field operations have centered around vertical or near vertical wells. Rarely have horizontal wells been designed for conversion to injectors or used for disposal and therefore, the effect of batch injection and the created disposal domain have not been addressed. The current paper will provide an integrated look at the fracturing process that occurred in a horizontal disposal well. The well is located in the Valhall Field, North Sea, and offshore Norway. The well has multiple perforated intervals. The work will address a modified disposal domain concept as it applies to horizontal wells. The paper illustrates a history of the fracture nature (geometry and extent) and propagation across the various layers. Comparison of the field pressure history and the simulation results will be addressed.

      Authors: K. S. Zaki, Advantek International; T. G.Kristiansen, BP Norway; A. S.Abou-Sayed, C. W. Summers, G. G. Wang, and M. D. Sarfare, Advantek International

      Copyright 2005, Society of Petroleum Engineers

    • "Ultimate Capacity of a Disposal Well in Drilling Waste Injection Operations," paper SPE/IADC 79804 presented at the 2003 SPE/IADC Drilling Conference, Amsterdam, The Netherlands, February 19 – 21.

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      Abstract: Drilling waste disposal through downhole hydraulic fracturing is often the preferred waste management option because it can achieve green operation and often has favorable economics. Most field situations are comprised of injection in either a dedicated well or in the annulus of an existing well. Containment of the disposed waste must be ensured and one of the questions in drilling waste injection operations is; what is the capacity of a disposal well or annular scheme? The answer to this question depends on downhole waste storage mechanisms. It is evident from laboratory simulation studies and field operation experience that multiple fractures are created in drill cuttings injection (DCI) operations and the capacity of a disposal well is much larger than that estimated from single fracture simulations. More importantly, as more solids are injected into the disposal formation, the local stress is modified. Because of this change in local stress, fracture shapes, and extents at the beginning of a DCI; operations can be significantly different from the fracture shapes and extents at the end the operation. Modeling of this fracturing evolution process is necessary and essential to ensure the safe containment of the disposed waste and to estimate accurately the disposal capacity of a drilling waste disposal well.

      Authors: Abou-Sayed, A.S., Guo, Q., and Meng, F.

      Copyright 2003, Society of Petroleum Engineers

    • "An Assessment of Economical and Environment Drivers of Sour Gas Management by Injection," SPE 97628, paper presented at the SPE International Improved Oil Recovery Conference in Asia Pacific, Kuala Lumpur, Malaysia, 5-6 December, 2005.

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      Abstract: Many of the largest fields yet to be developed around the world contain oil, water, and high concentrations of sour gas. The fact that they are still undeveloped reflects the significant political and economic hurdles they have yet to overcome. Successful production of such fields will require careful management of surface resources (land, water, and power), subsurface resources (hydrocarbons), and associated streams (produced water, non-salable products, and E&P wastes). Several fields in the Caspian Sea are awaiting full development because they are burdened by the high expected cost and severe legal and economic risks associated with high hydrogen sulphide (H2S) content. Advantek International was contracted to undertake a comparative analysis of the engineering requirements, environmental impact risks, and economics for disposal of several associated streams in a Caspian field with 20% acid gas (CO2 and H2S).

      Authors: Abou-Sayed, A.S., Zaki, K., Summers, C.

      Copyright 2005, Society of Petroleum Engineers

    • "Management of Sour Gas by Underground Injection - Assessment, Challenges and Recommendations", SPE 86605, presented at the SPE HSE Conference held in Alberta, Canada, 29-31 March 2004.

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      Abstract: Many of the world's Mega-fields (> 1 billion barrels of reserves) contain sour gas, a blend of natural gas and hydrogen sulfide (H2S), either alone or in combination with carbon dioxide (CO2). H2S gas is extremely toxic, the combination of H2S and CO2 (Acid Gas - AG), can be highly corrosive, the elemental sulphur reacts with water to form acid rain, and CO2is now recognized as a significant greenhouse gas. Where there is a demand for the natural gas, and capacity to separate the components, the H2S and CO2 can be separated out. However, these components must be managed in a cost-effect way and according to regulatory requirements to maximize recovery of hydrocarbons and minimize AG safety and environmental impacts. To date, the CO2 components have typically been vented to the atmosphere, and sulphur has been produced for industrial uses. Novel step changes are needed to handle the large sour gas volumes to be produced by the mega-fields under development in the Caspian Sea and Middle East regions.

      Authors: Abou-Sayed, A.S., Zaki, K., C. Summers, Advantek International Corporation

      Copyright 2004, Society of Petroleum Engineers

  • Water Injection

    Technical papers related to the water injection, including produced water reinjection, water flood, and injection of flowback water.

  • Geomechanics

    Technical papers related to reservoir geomechanics and wellbore stability generally, including rock physics.

    • "Some Advances in Near Wellbore Geomechanics," paper SPE/ ISRM 78194 presented at the 2002 SPE/ISRM Rock Mechanics Conference, Dallas, Texas, 20-23 October 2002.

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      Abstract: This paper attempts to discuss current gaps in understanding the intricacies and details of coupling farfield deformation to well completion. Examples are shown where reservoir compaction or dilatancy is explicitly coupled to near-wellbore behavior, with specific application for assessing well performance and survivability. The analyses can use reservoir simulations coupled with analytical predictions of stresses and deformations in individual simulator blocks. The predicted stresses and deformations form the boundary conditions for finite element modeling that can focus in on the details around the completion itself. This is in contrast to the current approaches that use explicit coupling of pressure and deformation in complete massive finite element representations, with refined gridding around the completion.

      Authors: McLennan, J.D. and Abou-Sayed, A.S.

      Copyright 2002, Society of Petroleum Engineers

    • "Laboratory Simulation of Liner Loading and Near-Wellbore Permeability Variation in Poorly Consolidated Sandstones," paper SPE 47291 presented at the 1998 SPE/ISRM Eurock '98, Trondheim, Norway, July 8-10, 1998.

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      Abstract: Flow experiments were performed on a ten-inch diameter by fifteen-inch long thick-walled cylindrical sample of poorly consolidated sandstone, with a 1.25-inch diameter borehole. The purpose was to evaluate the effect of changing stress regimes on near-wellbore permeability and liner loading. A one-inch diameter screened liner was installed in the wellbore to preclude sand production. The liner was instrumented with strain gages, in order to determine stresses resulting from borehole deformation during production. The cylindrical sample was instrumented with pore pressure probes, placed at different distances from the wellbore, in order to assess variation in formation permeability with evolving effective confining stresses and production regimes.

      Authors: Khodaverdian, M.F., Abou-Sayed, A.S., Ramos, R., Guo, Q. and McLennan, J.D.

      Copyright 1998, Society of Petroleum Engineers

    • "Mechanical and Thermal Properties of Unconsolidated Sands and Its Applications to the Heavy Oil SAGD Project in the Tia Juana Field, Venezuela," paper SPE 54009 presented at the SPE Latin America and Caribbean Petroleum Engineering Conference, Caracas, Venezuela, April 21-23, 1999.

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      Abstract: Thermal and mechanical rock properties were evaluated with special laboratory tests and logs to analyze a Steam Assisted Gravity Drainage (SAGD) project by MARAVEN S.A. (now part of PDVSA Exploración y Producción) in the heavy oil Tía Juana field on the eastern side of Lake Maracaibo, Venezuela. This SAGD project is the first application of this technology in Venezuela and consisted of two parallel horizontal wells on top of each other where steam is injected in the upper well and oil is produced in the lower well.

      Authors: Abou-Sayed, A.S., Guo, Q., Vasquez, A.R., Sanchez, M.S., Portillo, F., Poquioma, W., Blundun, M., and Mendoza, H.

      Copyright 1999, Society of Petroleum Engineers

    • “Compaction-Induced Wellbore Failure and Fault Instability: A Hybrid Approach," ARMA/NARMS 04-594 presented at ARMA's 6th NARMS: Gulf Rocks 2004, 5-9 June.

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      Abstract: This paper outlines a solution approach for evaluating the stability of casing and faults due to reservoir compaction. Firstly, a geomechanics model is presented for the evaluation of casing failure due to reservoir compaction. Secondly, a three dimensional finite element analysis is coupled with the developed geomechanics compaction model for the detailed casing failure analysis. Deformations and stresses are determined on a cylindrical surface surrounding the length of the newly drilled or completed wellbore in the regions of interest. This cylindrical surface is sufficiently remote from the wellbore so that the wellbore has no or little influence on the stresses and displacements due to the reservoir compaction on this surface. The calculated displacements on the cylindrical surface are then used as boundary conditions for a focused near-wellbore stress and strain analysis using finite element technology. This hybrid analysis affords evaluating the near wellbore details that are often glossed over with a fastly compacted solution not requiring multimillion FEA cells. Yet, it preserves the fine details around the wellbore and allows for incorporating fault loading and macro influences of geologic structures and reservoir extent. It preserves the material balance and does not alter the pressure volume relationship in the reservoir void space. Interface elements can account for the slippage between the casing and the cement and between the formation rock and the cement. Field cases are presented for both the geomechanics model and hybrid finite element model.

      Authors: Abou-Sayed, A.S., F. Meng, and G. Wang, Advantek International Corporation

    • "Assessment of Casing Integrity and Subsidence Coupled With Reservoir," SPE/ISRM 76797 Simulation in Deepwater Reservoirs.

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      Abstract: Various geomechanical-modeling approaches, which cover a wide range of techniques and complexity, have been developed to assess the stability of a borehole and/or the integrity of well casing. The ability to confidently use these models can be limited, however, because they generally do not allow the model user to consider the "real-world" variability of the input parameters defined in the models. Often, these geomechanical models do not adequately accommodate the innate variability of the rock properties (mechanical and petrophysical) of the target reservoirs. Consequently, this deterministic approach too often results in uncertainty about the "correct" value of a critical parameter to use and insecurity in the model results. Decisions based on these results can later, not surprisingly, be found to be incorrect. Model users attempting to overcome the limitations noted above have tried various techniques. Subjective estimation, arbitrary "minimums", grading techniques, and stepwise estimation have all been commonly used.

      Authors: Abou-Sayed, A.S., Guo, Q., and Meng, F., Advantek International Corporation

      Copyright 2004, Society of Petroleum Engineers

    • "Modeling of Reservoir Compaction and Casing Integrity Evaluation Using Reservoir Simulation," paper SPE 81072 presented at the SPE Latin American and Caribbean Petroleum Engineering Conference held in Port-of-Spain, Trinidad, West Indies, 27-30 April 2003.

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      Abstract: The paper discusses the impact of reservoir production on wellbore integrity and survivability when the compacting reservoir behaves as a deformable permeable body. The discussion is carried out using results of a numerical geomechanics model developed for estimating reservoir compaction, the subsequent surface/mudline subsidence; and the displacements, stresses and strains along the wellbore trajectories.

      Authors: Abou-Sayed, A.S., Guo, Q., Meng, F., Noble, J.E.

      Copyright 2003, Society of Petroleum Engineers

  • Hydraulic Fracturing

    Technical papers related to hydraulic fracturing, including case studies, advances in model building, and other topics.

  • Oilfield Waste Management

    • Waste Management Can’t Be Overlooked - E&P

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      The American Petroleum Institute estimates that about 1.21 bbl of drilling waste are generated for every foot drilled in the U.S., nearly 50% of which is solid waste. Though various federal and local laws and regulations govern the disposal of oilfield waste, regulatory compliance is not itself a sufficiently high standard to ensure the industry’s license to operate. Especially in this period of declined oil prices, with operators driven to cut costs wherever possible, it is critical that as an industry we recognize those technologies that provide a high degree of environmental surety while reducing near-term and long-term costs. We must demonstrate that we can manage our wastes in ways that improve the economic and environmental sustainability of our developments.

Advantek Waste Management Services Announces New Board Member

Advantek Waste Management Services LLC (Advantek), a leading waste management company and innovator of best practice techniques for managing wastes produced by the oil and gas industry, announced today that David J. Hayes has joined its Board of Directors. Mr. Hayes is a Distinguished Visiting Lecturer in Law at the Stanford Law School and a Visiting Senior Fellow at the Center for American Progress.

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Advantek Waste Management Services Funded by TPG Capital

Advantek Waste Management Services LLC (AWMS) announced today that TPG Alternative & Renewable Technologies ("TPG ART") has funded its spin-off from Advantek International (Advantek). TPG ART's funding will accelerate AWMS's growth and scale as a full service oilfield waste management company, which will build upon Advantek's long and successful history of leadership in the waste management field, particularly as it relates to solids, muds, slurry, and water injection. Terms of the deal are not disclosed.

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