Elements of Thermally Treating Oil-Base Mud Cuttings

Young, G.A.; Growcock, Fred; Talbot, K.J.; Lees, Janet M.; Worrell, B.

doi:10.2118/21939-ms

Cited by 4 publications

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“…On a site of oil drilling, mud provide several important functions: lubrication of drilling bits, the maintenance of subsurface pressures, and transport of cuttings towards surface. It is a complex system of fluids based on water (WBM) or on oil (OBM) [1] , with several chemical and mineral additives. The types of drilling fluids and their components in most wells were shown in the Table 1.…”

Section: Introductionmentioning

confidence: 99%

Management of Drilling Waste in an Environment and Economic Acceptable Manner

Wang

Zheng

Deng

2012

AMR

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In upstream petroleum industry, one of the major operations that can potentially impact the environment is drilling. A major component of the wastes generated during drilling are the rock cuttings and the drilling fluids. The drilling fluids can have different chemical composition and various additives. Spilled or improperly disposed drilling wastes have the potential to harm plants and animals, and it should be managed to minimize risk to human health and the environment. The increasing environmental legislation surrounding drilling operations has led to a rapid rise in drilling waste management spending by operators. Managing wastes to minimize their harm potential to health and environment is the international concern and requires efficient management of wastes to reduce the environmental impacts. The management and control of waste which develops from the strategy can also have the beneficial effect of reducing the number of health related issues.This paper presents the waste management including recognizing the waste sources and methods which are used to minimize the impaction to environment and human health from drilling waste. This paper also reviews the strategy of drilling waste management which could reduce the number of health related issues as well as environment pollution.

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Section: Introductionmentioning

confidence: 99%

Management of Drilling Waste in an Environment and Economic Acceptable Manner

Wang

Zheng

Deng

2012

AMR

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A Review on Impacts of Drilling Mud Disposal on Environment and Underground Water Resources in South of Iran

et al. 2009

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In Drilling Oil Wells a system of complex fluids and chemical additives is used. Losses of these fluids in the well during drilling or disposal of them in well site could transfer pollutants to groundwater. In the present study a number of well sites, located in South of Iran, were studied to indicate types and magnitude of various pollutant materials that remain in the environment undestroyed and have considerable impacts on the underground water resources. Hydrocarbons used in Oil Base Muds (OBM) that can't be biodegrade readily in nature found to be the most severe pollutant material caused by disposal of Drilling Mud and Cuttings. Volume of drilling waste for these oil wells evaluated to be an average almost 0.5 m3 per one meter of drilled oil well. Available common treatment methods were compared to assess the most economically and environmentally attractive treatment scenarios. Thermal desorption and reserve pit without treatment are two most dominant methods could be conducted in Southern Oil Fields of Iran, each has its advantages and disadvantages. Due to geological structure and near surface aquifer in Khuzestan province thermal desorption should be conducted to disposal cuttings to reduce their hydrocarbon content to less than 5% according to European Standard. Major challenges of drilling waste management program in onshore oil fields of Iran were studied and clear principals for managing waste streams, which include: reduce, replace, reuse, recycle, recover, treat and final dispose, were listed along with material, equipment and strategies that should be considered in each step. Introduction Oil well drilling operations are responsible for the disposal of large quantities of drill cuttings and fluids. On a site of oil drilling, mud provide several important functions, lubrication of drilling bits, the maintenance of subsurface pressures, and transport of cuttings towards surface. It is a complex system of fluids based on water (WBM) or on oil (OBM), with several chemical and mineral additives. The formulation of these muds is adjusted with precision according to the physicochemical conditions of drilling, which change with the depth, and the nature of the crossed geological formations [3]. Other than the fluid (either water or oil or both) and the solid phases, different types of chemicals and polymers are used in designing a drilling mud to meet some functional requirements such as appropriate mud rheology, density, mud activity, fluid loss control property etc. Though the factors that guide the choice of a fluid base and the mud additives are complex, the selection of the additives must take account of both the technical and environmental factors to eliminate any environmental impact [4]. Due to potential detrimental effect of non-environment friendly drilling fluids, Environmental Protection Agency (EPA) and other regulatory bodies are imposing increasingly stringent regulations on the use and disposal of non-environment friendly drilling fluids, whether it is water-based or oil-based [4].

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Fluids Re-Injection (FRI): A Waste Management Technique

AlKhaldi

Al-Yami

2011

SPE Asia Pacific Oil and Gas Conference and Exhibition

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Disposal of produced fluids, during different well activities, has been one of the main challenges for field operators due to environmental and economical concerns. The limitations on the discharge of oily wastes in addition to other regional regulations have resulted in several efforts to develop technologies and techniques that can be utilized as on-site disposal mechanism. One technique is to re-inject produced fluids into non-productive permeable zones of adjacent wells.A comprehensive lab investigation was conducted in order to explore the feasibility of re-injecting various produced fluids during different activities such as mudcake clean-out, completion, or well stimulation treatments. This study includes also a detailed investigation of emulsion and scaling potential of various produced fluids mixtures: oil/clean-out fluid, oil/spent acid, spent acid/formation brine and clean-out/formation brine. In addition, a series of coreflood experiments was conducted to assess the effect of produced fluids injection on the initial permeability of core plugs taken from non-productive sandstone formation. These experiments were conducted at reservoir temperature using representative cores and collected produced fluids.Coreflooding experiments showed that the effect of oil injection on core plugs permeability was mainly constrained by the initial core permeability. In tight cores, K = 25 mD, injection of oil damaged the core by forming external oil filter cake on the face of core. However, in cores with high initial permeability, K > 1 D, nearly 10 PV of produced oil was injected with no observed formation damage. Similarly, clean-out fluids/oil mixtures were also injected with no observed formation damage. In contrast to oil/clean-out fluids, spent acid/oil injection effect on core permeability value was dependent on injected spent acid type. This paper provides the recommendations and limitations of using produced fluids re-injection as a waste management technique.

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Elements of Thermally Treating Oil-Base Mud Cuttings

Cited by 4 publications

References 0 publications

Management of Drilling Waste in an Environment and Economic Acceptable Manner

Management of Drilling Waste in an Environment and Economic Acceptable Manner

A Review on Impacts of Drilling Mud Disposal on Environment and Underground Water Resources in South of Iran

Fluids Re-Injection (FRI): A Waste Management Technique

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