Wellbore damage zone experimental determinination

technical report

Publisher: Office of Nuclear Waste Isolation, Battelle Project Management Division, Publisher: Available from National Techncal Information Service in Colombus, Ohio, Springfield, VA

Written in English
Published: Pages: 110 Downloads: 322
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Subjects:

  • Rocks.,
  • Drilling and boring.

Edition Notes

StatementR. Lingle ... [et al.].
ContributionsLingle, R., United States. Dept. of Energy., Battelle Memorial Institute. Office of Nuclear Waste Isolation., Terra Tek, Inc.
The Physical Object
Paginationvi, 110 p. :
Number of Pages110
ID Numbers
Open LibraryOL15263883M

  A wellbore is a hole that is drilled to aid in the exploration and recovery of natural resources, including oil, gas, or water. A wellbore is the actual hole that forms the well. A wellbore . For the depth of wellbore collapse (as shown in Figure 16), the damaged zone increased rapidly and then tends to be stable and increases linearly by the influence of hydration effect. Therefore, the hydration effect of shale in the Shahejie Formation is very obvious and the wellbore collapse is a time-dependent progressive failure process. 6. 3 Shear failure and wellbore breakouts. 6. 3. 1 Breakout angle determination; 6. 3. 2 Breakout measurement; 6. 3. 3 Maximum horizontal stress determination from breakout angle. 6. 4 Tensile fractures and wellbore breakdown. 6. 4. 1 Identification of tensile fractures in wellbores. 6. 5 The mud window; 6. 6 Mechanical stability of deviated. Hydraulic fracturing, also called fracking, fracing, hydrofracking, fraccing, frac'ing, and hydrofracturing, is a well stimulation technique involving the fracturing of bedrock formations by a pressurized liquid. The process involves the high-pressure injection of 'fracking fluid' (primarily water, containing sand or other proppants suspended with the aid of thickening agents) into a wellbore.

Traditional models for determining fracture initiation pressure (FIP) either consider a wellbore with an impermeable mudcake or with no mudcake at all. An analytical model considering permeable mudcake is proposed in this paper. The model can predict pore pressure and stress profiles around the wellbore, and consequently the FIP, for different mudcake thickness, permeability, and strength. An experimental study of Permeability Determination in the lab. 1st International Conference on Petroleum and Mineral Resources, 4 - 6 December, Koya, Kurdistan, Iraq. -Cole, J., & Rasouli, V., Numerical Simulations of CO2 Injection into a Porous Sandstone Formation. 1st International Conference on Petroleum and Mineral Resources, 4 - 6. @article{osti_, title = {ADVANCED FRACTURING TECHNOLOGY FOR TIGHT GAS: AN EAST TEXAS FIELD DEMONSTRATION}, author = {Sharma, Mukul M}, abstractNote = {The primary objective of this research was to improve completion and fracturing practices in gas reservoirs in marginal plays in the continental United States. The Bossier Play in East Texas, a very active tight gas play, was . "An Experimental and Analytical Study of Steam-Water Capillary Pressure", SPE Reservoir Evaluation and Engineering, 4(6), December , Li, K. and Horne, R.N.: “Characterization of Spontaneous Water Imbibition into Gas-Saturated Rocks,” SPEJ (December ), 6 (4), p

  According to the analysis, the instability was mainly caused by high pH (pH = 11~12) of drilling fluids (Table 1). In this paper, a new insight was proposed on why wellbore instability can be induced by high-pH drilling fluids, in terms of some chemical reaction experiments on both high-pH solution and shale. 2. Samples and Experimental Methods. One of the most challenging tasks faced by environmental engineers is cost effective hydraulic and hydrochemical characterization of a fractured bedrock aquifer by means of exploratory wellbores. To address this problem, a new borehole fluid logging method for rapidly and efficiently determining the. The rate at which formation particles are removed will stabilize with this shape evolution and the removal of the zone damaged by completion practices. If the production rate is varied (wells are often shut in for periods of time), sand production will likely temporarily increase when production starts again. Any restriction to flow from near-well reductions in flow capacity. This damage is thought to result from reductions in near-well permeability caused by perforating debris or from the solids or mud filtrate invasion caused by the drilling process.

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Wellbore damage zone experimental determinination. Columbus, Ohio: Office of Nuclear Waste Isolation, Battelle Project Management Division ; Springfield, VA: Available from National Technical Information Service, (OCoLC) Material Type: Government publication, National government publication: Document Type: Book: All Authors.

Leakage of CO2 and brine from geologic storage reservoirs along wellbores is a major risk factor to the success of geologic carbon sequestration.

We conducted multiphase [supercritical (sc)CO2-brine] coreflood experiments that simulate a leakage pathway along the cement/rock interface.

A composite core constructed of oil-well cement and siltstone separated by a simulated damage zone (defect Cited by: A Method for Determination of Near-wellbore Zone Properties Alteration during Well Drilling, Completion and Cleanup Operations by Combination of Numerical Simulations and Special Experimental Technique Modelling of both near-wellbore damage and natural cleanup of horizontal wells drilled with a water-based mud.

SPE Dobrynin, V.M Cited by: 1. The damaged formation zone is very susceptible to drilling fluid and results in alteration of existing pore pressure and fracture pressure.

This paper presents integrated experimental and analytical solutions for wellbore strengthening due to mud cake by: Wellbores are largely constructed during coal mining, shale gas production, and geothermal exploration. Studying the shape and size of the disturbed zone in surrounding rock is of great significance for wellbore stability control.

In this paper, a theoretical model for elastic-plastic-damage analysis around a deep circular wellbore under non-uniform compression is by: 1. A Method for Determination of Near-Wellbore Zone Properties Alteration During Well Drilling, Completion, and Cleanup Operations by Combination of Numerical Simulations and Special Experimental Technique.

Presented at the SPE European Formation Damage Conference and Exhibition, Budapest, Hungary, 3–5 June. Jiaming Zhang, Zhangxin Chen, in Formation Damage During Improved Oil Recovery, Discussion. There have been numerous classical topics about formation damage in a near-wellbore region of the rock matrix resulting from an application of TEOR including sands and fines migration, clay swelling, mineral transformation, minerals dissolution and precipitation, wettability alteration, scale.

From micro-CT images three zones around the borehole were identified including the collapsed zone (red), the micro-cracked/damaged zone (blue) and the rest of the sample (Fig. Two cross-sections of sample C are shown in Fig. 5a and b, respectively, to show the directionality of the collapsed and micro-cracked zones.

Hence, the high pressure will allow the solid particles and the fluid filtrate to invade the non-damaged zone or so-called pay zone around the well and consequently, it sustains the damage formation (Civan, ) (Fig. 1(c)). During the invasion Wellbore damage zone experimental determinination book drilling fluid through the reservoir rock, the filtrate fluid will mix and push forward the fluid.

Horizontal well (HW) was divided into several elements after acidizing. In each element, there would exist a composite zone that was made up of damage zone (DZ) and acidizing zone (AZ).

Local skin factor after acidizing was used to describe the resistance in each composite zone. The models for local skin factor and productivity of HW were created using the method of equivalent filtration.

Based on the results from the simulations, the following conclusions are drawn:(1)The development of damage zone around the opening is strongly dependent on the in-situ stress conditions even.

The book establishes the basic principles involved before introducing practical measurement and experimental techniques to improve recovery and reduce exploitation costs.

It illustrates their successful application through case studies taken from oil and gas fields around the world.

A major damage mechanism of formation damage is the reduction of relative permeability surrounding the well due to changes of fluid saturation in the invaded zone.

Based on the Hawkins () equation, the reduction of permeability surrounding the wellbore and the invasion radius must be estimated to quantify the degree of damage.

The experimental results of specimens 3# show that gel fracturing could offset the confinement of fracture height at least in the near-wellbore zone. The fractures created by gel fracturing was likely to penetrate through the BPs directly, resulting in only activating a small number of BPs.

matrix acidizing in carbonate reservoir 1. Kurdistan Reginal Government Ministry of Higher Education Knowledge University College of Engineering Petroleum Engineering Department 4th stage graduation project Matrix acidizing in carbonate reservoir A thesis submitted in partial fulfilment of the requirements for the award of Bachelor’s Degree in Petroleum Engineering Prepared By: Mohammed.

Zhiqiang Tang, Xinhai Kong, Wenjiang Duan, Jiajia Gao, Wellbore breakout analysis and the maximum horizontal stress determination using the thermo-poroelasticity model, Journal of Petroleum Science and Engineering, /, (), (). Experiment scheme. To study the effects of tectonic compression, injection rate and viscosity of fracturing fluid on hydraulic fracture propagation across bedding planes, experiment parameters were designed as shown in table states of the strike-slip fault (overlying stress is the intermediate principal geo-stress) were set in experiments, similar to the stress condition of the.

The stability of hydrate-bearing near-wellbore reservoirs is one of the key issues in gas hydrate exploitation. In most previous investigations, the damage evolution process of the sediment structure and its effect on near-wellbore reservoir stability have been neglected.

Therefore, the damage variable is introduced into a multi-field coupled model based on continuous damage theory and multi. The finite element analysis (FEA) technology by hydraulic-mechanical-damage (HMD) coupling is proposed in this paper for wellbore stability analysis of transversely isotropic rock, developed basing on the recently established FEA technology for isotropic rock.

The finite element (FE) solutions of numerical wellbore model, damage tensor calculation and Pariseau strength criterion for. Zhouhua Wang is an associate professor at the College of Petroleum & Gas Engineering at Southwest Petroleum University, as well as an associate research fellow affiliated with the State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation.

Wang has authored or coauthored more than 30 technical papers and holds 3 patents. His research interests include phase behavior of reservoir. In reviewing Chinese shale gas reserves and national policies regarding shale gas exploitation, shale gas will be of critical importance in providing clean natural gas to China.

However, compared to those in the United States, the cost of shale gas extraction and the complex problems encountered in more complex and deep drilling in China are key technologies that need to be overcome.

Explore the latest full-text research PDFs, articles, conference papers, preprints and more on WELLBORE STABILITY. Find methods information, sources, references or conduct a literature review on.

contributions to total flow occurring through the wellbore damage zone, the plug core, and - the surrounding undisturbed anhydrite bed.

The m-long by cm-diameter grout plug limits flow from the high-pressure ( MPa) Bell Canyon aquifer to literlday ( gallday), a.

Precise testing methods have been applied to an experimental study of the effect of the intermediate principal stress σ 2 on failure of a granite, a limestone, and a dolomite rock at room temperature. σ 2 affects failure in two ways. Strength at failure increases with σ 2 by an amount that is proportional to, although smaller than, the amount of the least compression σ 3; this effect of σ.

This book focuses on the underlying mechanisms of lost circulation and wellbore strengthening, presenting a comprehensive, yet concise, overview of the fundamental studies on lost circulation and wellbore strengthening in the oil and gas industry, as well as a detailed discussion on the limitations of the wellbore strengthening methods currently used in industry.

Reservoir Formation Damage, Third Edition, provides the latest information on the economic problems that can occur during various phases of oil and gas recovery from subsurface reservoirs, including production, drilling, hydraulic fracturing, and workover operations.

The text helps readers better understand the processes causing formation damage and the factors that can lead to reduced flow. Drillability determination: a drillability index for percussion drills / ([Pittsburgh]: U.S.

Dept. of the Interior, Bureau of Mines, []), by Sathit Tandanand, Harold F. Unger, and United States. Bureau of Mines (page images at HathiTrust). The proposed procedure, known as impulse fracture test,'' is an injection/falloff test designed for the determination of formation permeability and reservoir pressure.

The hydraulically induced fracture can pass the near wellbore damaged zone and expose a larger formation area to flow. The permeability and reservoir pressure determined are.

The challenge for those involved in the design of non-damaging drill-in fluids is to effectively minimize formation damage, especially in open-hole completion applications. Formation damage may be evaluated using a number of laboratory techniques.

One useful method, which is summarized for brevity, measures the initial oil or gas permeability of a natural core or other porous medium. Therefore, in order to avoid the occurrence of any damage zone around the borehole wall, the mud pressure must be increased [8]. On the other hand, an increase in the mud pressure may cause.

Near-wellbore pressure loss is a combination of pressure drop near the wellbore based on perforation friction and tortuosity (Chipperfield et al. ). High NWBPL results in a lower percentage.In book: Rock Mechanics: Meeting Society's Challenges and Demands (pp) can only reflect the degree of difficulty for the initiation of damage at the wellbore rather than the extent.1.

n. [Drilling] The drilled hole or borehole, including the openhole or uncased portion of the well. Borehole may refer to the inside diameter of the wellbore wall, the rock face that bounds the drilled hole. Synonyms: borehole See: inside diameter, openhole.