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Keywords: formation damage
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Proceedings Papers

Paper presented at the Annual Technical Meeting, June 7–9, 1998
Paper Number: PETSOC-98-01
... Abstract During drilling and completion phases, the primary mechanisms of near-welibore formation damage can be attributed to the following factors: pore throat constriction catied by clay swelling, deflocculation due to incompatible fluids or clay migration; water blocking resulting in...
Proceedings Papers

Paper presented at the Annual Technical Meeting, June 7–9, 1998
Paper Number: PETSOC-98-58
... Abstract Underbalanced drilling (UBD) in becoming increasingly used as a technique to reduce significant invasive formation damage in vertical and horizontal wells to improve production rates of oil and gas, and enhance injectivity in gas and water injection situations. UBD may be a...
Proceedings Papers

Paper presented at the Annual Technical Meeting, June 7–10, 1997
Paper Number: PETSOC-97-103
... to the permeability of the near wellbore area due to leak off and mud cake deposition on the face of the production zone. Thus, the formation damage can be related to both the filter cake and the filtrate that invades the productive zone. It is often necessary to apply stimulation treatments to...
Proceedings Papers

Paper presented at the Annual Technical Meeting, June 9–11, 1996
Paper Number: PETSOC-96-83
... Abstract Horizontal wells with open hole completion have become in Venezuela a way to improve production in mature fields. In this scenario, it is necessary to prevent formation damage while drilling these wells. A new laboratory test has been designed to measure the formation damage left by...
Proceedings Papers

Paper presented at the Annual Technical Meeting, June 9–11, 1996
Paper Number: PETSOC-96-88
... Abstract A novel matrix stimulation concept, formation heat treatment (FHT), which involves the application of intense heat for the treatment of water-blockage and clay-related formation damage in water-sensitive formations was developed and tested in the laboratory. Initial bench-scale...
Proceedings Papers

Paper presented at the Annual Technical Meeting, June 6–8, 1995
Paper Number: PETSOC-95-18
... horizontal. For non-coredreservoir sections, drill cuttings can be valuable in formations evaluation. Areas that should be assessed before horizontal drilling include, reservoir description, wellbore stability, and formation damage potential. Reservoir description, including heterogeneity definition, is...
Proceedings Papers

Paper presented at the Annual Technical Meeting, June 6–8, 1995
Paper Number: PETSOC-95-71
... Abstract Clay minerals in hydrocarbon reservoirs often cause formation damage. The wellknown examples are fines migration, clay swelling, and hydrothermal mineralreactions. In the last few decades, numerous clay stabilizers have beendeveloped to control formation damage related to clay...
Proceedings Papers

Paper presented at the Annual Technical Meeting, June 6–8, 1995
Paper Number: PETSOC-95-67
... Abstract During drilling and completion the primary mechanisms of near-wellbore formation damage include pore-throat constriction, water blocking, plugging with drill solids and mud products, and loading of the reservoir with drilling or completion fluids. Among these mechanisms, some of the...
Proceedings Papers

Paper presented at the Annual Technical Meeting, June 11–14, 1994
Paper Number: PETSOC-94-17
... that the process of underbalanced drilling reduces the potential for formation damage, the possibility of invasive formation damage still exists in certain reservoirs where the initial saturation (either hydrocarbon or water) is substantially less than the irreducible saturation of the phase which is...
Proceedings Papers

Paper presented at the Annual Technical Meeting, June 11–14, 1994
Paper Number: PETSOC-94-15
... concepts for improved performance prediction of these wells. To predict the productivity index of horizontal wells requires the determination of the pressure drop due to formation damage around such wells. Long duration of formation exposure to drilling fluids may be the main reason for the unexpected...
Proceedings Papers

Paper presented at the Annual Technical Meeting, June 11–14, 1994
Paper Number: PETSOC-94-21
... petroleum society oilfield chemistry formation damage drilling fluids and materials assessment mechanicalbehaviour rock-fluid interaction penetration rock-fluid incompatibility structural unit drilling fluid formulation drilling fluid property upstream oil & gas production chemistry...
Proceedings Papers

Paper presented at the Annual Technical Meeting, June 6–9, 1992
Paper Number: PETSOC-92-45
.... The samples initially contained only kaolinite and illite clays, classically classified as non-water sensitive. This paper presents the results of three detailed laboratory coreflow experiments and documents the degree of formation damage (up to 95% reductions in permeability were observed) due to...
Proceedings Papers

Paper presented at the Annual Technical Meeting, April 20–23, 1991
Paper Number: PETSOC-91-90
... Abstract Hot oiling is the most commonly used method for removing paraffin deposits in oilfield operations because of its immediate results and relatively low operation cost. However, hot-oiling may also cause formation damage. This study examines the hot oiling practices on 92 Utikuma Lake...
Proceedings Papers

Paper presented at the Annual Technical Meeting, June 9–12, 1990
Paper Number: PETSOC-90-106
... Mexico. Reservoir deliverability in these areas with significant coalbed methane resources and reserves is less influenced by thickness, depth, completion technique, and measured and inferred pressure and formation damage. Cleats (coal fractures) in cores from four northern San Juan Basin Gas Research...
Proceedings Papers

Paper presented at the Annual Technical Meeting, June 9–12, 1990
Paper Number: PETSOC-90-57
... Abstract A model is described to optimize hot oil/water effectiveness and minimize formation damage. Calculations show that hot oil jobs are often too large. In most cases the same amount of wax can be removed with smaller volumes of hot fluid. Smaller hot oil volumes reduce formation damage...
Proceedings Papers

Paper presented at the Annual Technical Meeting, June 9–12, 1990
Paper Number: PETSOC-90-58
... solvents to remove hydrocarbon based formation damage. Treatment with this chemical has been effective in removal of multi-continent hydrocarbon and hydrocarbon/water causeddamage. The removal of this damage in producing wells provides increased production at rates and lifetimes exceeding those obtained by...
Proceedings Papers

Paper presented at the Annual Technical Meeting, June 11–15, 1988
Paper Number: PETSOC-88-39-65
... Abstract As reserves dwindle and exploration/development cost escalates particularly in frontier regions, the need for effective prevention and/or treatment of formation damage to maximize well productivity, has become apparent to prudent operators. This paper discusses economic implications...
Proceedings Papers

Paper presented at the Annual Technical Meeting, June 7–10, 1986
Paper Number: PETSOC-86-37-67
... Abstract Numerical simulation of hydraulic fracturing with liquid CO 2 is discussed in this paper. Field experience indicates that CO 2 is a preferred fluid in sensitive reservoirs where there is a risk of formation damage with conventional treatments. Simulation of the process, which is...

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